./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_6-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_6-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-17 19:52:27,112 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:52:27,161 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:52:27,166 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:52:27,168 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:52:27,187 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:52:27,188 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:52:27,188 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:52:27,189 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:52:27,190 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:52:27,191 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:52:27,191 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:52:27,191 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:52:27,194 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:52:27,194 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:52:27,194 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:52:27,194 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:52:27,195 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:52:27,195 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:52:27,195 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:52:27,195 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:52:27,195 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:52:27,196 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:52:27,196 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:27,197 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:52:27,197 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:52:27,198 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:52:27,198 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:52:27,198 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:52:27,198 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:52:27,198 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:52:27,200 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:52:27,201 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-17 19:52:27,416 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:52:27,436 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:52:27,438 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:52:27,439 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-17 19:52:27,440 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-17 19:52:27,442 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_6-1.yml/witness-2.1.yml [2024-09-17 19:52:27,489 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:52:27,490 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:52:27,490 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2024-09-17 19:52:28,680 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:52:28,891 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:52:28,891 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_6-1.c [2024-09-17 19:52:28,897 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/e0116a0bd/a53bebcad3334c389fee1c305b59b7c6/FLAG6be646fd0 [2024-09-17 19:52:29,261 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/e0116a0bd/a53bebcad3334c389fee1c305b59b7c6 [2024-09-17 19:52:29,261 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:52:29,262 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-17 19:52:29,263 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:29,263 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:52:29,270 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:52:29,271 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:27" (1/2) ... [2024-09-17 19:52:29,272 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6671fe80 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,272 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:27" (1/2) ... [2024-09-17 19:52:29,273 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7bd404ba and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,274 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:29" (2/2) ... [2024-09-17 19:52:29,274 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6671fe80 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,274 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:52:29" (2/2) ... [2024-09-17 19:52:29,278 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-17 19:52:29,280 INFO L1541 ArrayList]: Function contract at [L19]: requires null, ensures (((((((((2 == \result) && (3 == \old(n))) || ((\result == 1) && (\old(n) == 1))) || (5 < \old(n))) || ((3 == \result) && (\old(n) == 4))) || (\old(n) < 1)) || ((5 == \result) && (5 == \old(n)))) || ((\result == 1) && (2 == \old(n)))) && (((\result == 0) || (\old(n) == 1)) || (1 < \old(n)))) [2024-09-17 19:52:29,280 INFO L1541 ArrayList]: Function contract at [L9]: requires null, ensures ((\result == 0) || (0 < \old(n))) [2024-09-17 19:52:29,293 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:52:29,413 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_2calls_6-1.c[946,959] [2024-09-17 19:52:29,416 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:29,435 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-17 19:52:29,474 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_2calls_6-1.c[946,959] [2024-09-17 19:52:29,475 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:52:29,486 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:52:29,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29 WrapperNode [2024-09-17 19:52:29,487 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:52:29,488 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:29,488 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:52:29,488 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:52:29,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,498 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,509 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-17 19:52:29,509 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:52:29,510 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:52:29,510 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:52:29,510 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:52:29,517 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,517 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,518 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,524 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure fibo2 is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-17 19:52:29,524 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,525 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,527 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,528 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,529 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,529 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,530 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:52:29,531 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:52:29,531 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:52:29,531 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:52:29,532 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (1/1) ... [2024-09-17 19:52:29,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:52:29,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:29,558 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-17 19:52:29,559 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-17 19:52:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:52:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-17 19:52:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-17 19:52:29,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-17 19:52:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-17 19:52:29,591 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-17 19:52:29,591 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:52:29,592 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:52:29,638 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:52:29,639 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:52:29,755 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-17 19:52:29,755 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:52:29,771 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:52:29,771 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:52:29,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:29 BoogieIcfgContainer [2024-09-17 19:52:29,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:52:29,772 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:52:29,772 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:52:29,775 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:52:29,775 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 17.09 07:52:27" (1/4) ... [2024-09-17 19:52:29,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeb1313 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:52:29" (2/4) ... [2024-09-17 19:52:29,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeb1313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,776 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:52:29" (3/4) ... [2024-09-17 19:52:29,776 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5aeb1313 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:52:29, skipping insertion in model container [2024-09-17 19:52:29,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:52:29" (4/4) ... [2024-09-17 19:52:29,778 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_6-1.c [2024-09-17 19:52:29,791 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:52:29,791 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-09-17 19:52:29,829 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:52:29,834 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;@754d48fd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:52:29,834 INFO L337 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-09-17 19:52:29,837 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 19:52:29,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-17 19:52:29,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:29,844 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-17 19:52:29,844 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:29,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:29,848 INFO L85 PathProgramCache]: Analyzing trace with hash 83656213, now seen corresponding path program 1 times [2024-09-17 19:52:29,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:29,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120182128] [2024-09-17 19:52:29,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:29,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:29,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:29,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:29,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:29,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120182128] [2024-09-17 19:52:29,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120182128] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:29,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:29,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:52:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734829144] [2024-09-17 19:52:29,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:29,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 19:52:29,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 19:52:30,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:52:30,007 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,032 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-09-17 19:52:30,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 19:52:30,034 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-17 19:52:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,039 INFO L225 Difference]: With dead ends: 30 [2024-09-17 19:52:30,039 INFO L226 Difference]: Without dead ends: 28 [2024-09-17 19:52:30,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 19:52:30,044 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 58 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:30,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-17 19:52:30,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2024-09-17 19:52:30,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 19 states have internal predecessors, (23), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 19:52:30,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 33 transitions. [2024-09-17 19:52:30,075 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 33 transitions. Word has length 5 [2024-09-17 19:52:30,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,075 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 33 transitions. [2024-09-17 19:52:30,075 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,075 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 33 transitions. [2024-09-17 19:52:30,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-09-17 19:52:30,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,076 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,076 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:52:30,077 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1701623902, now seen corresponding path program 1 times [2024-09-17 19:52:30,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642994621] [2024-09-17 19:52:30,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642994621] [2024-09-17 19:52:30,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642994621] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:30,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:30,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-17 19:52:30,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208878950] [2024-09-17 19:52:30,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:30,133 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:52:30,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:52:30,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:30,135 INFO L87 Difference]: Start difference. First operand 27 states and 33 transitions. Second operand has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,158 INFO L93 Difference]: Finished difference Result 37 states and 46 transitions. [2024-09-17 19:52:30,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:52:30,159 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-09-17 19:52:30,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,161 INFO L225 Difference]: With dead ends: 37 [2024-09-17 19:52:30,162 INFO L226 Difference]: Without dead ends: 37 [2024-09-17 19:52:30,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:30,164 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 8 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 77 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:30,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-17 19:52:30,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2024-09-17 19:52:30,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 23 states have (on average 1.3478260869565217) internal successors, (31), 25 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:52:30,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-17 19:52:30,174 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 6 [2024-09-17 19:52:30,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,174 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-17 19:52:30,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,175 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-17 19:52:30,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-17 19:52:30,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,176 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,176 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 19:52:30,177 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,178 INFO L85 PathProgramCache]: Analyzing trace with hash 422480245, now seen corresponding path program 1 times [2024-09-17 19:52:30,178 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205449324] [2024-09-17 19:52:30,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,179 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205449324] [2024-09-17 19:52:30,348 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205449324] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:30,348 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:30,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:52:30,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073164738] [2024-09-17 19:52:30,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:30,351 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:52:30,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:52:30,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:30,354 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,418 INFO L93 Difference]: Finished difference Result 41 states and 56 transitions. [2024-09-17 19:52:30,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-17 19:52:30,419 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 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 9 [2024-09-17 19:52:30,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,421 INFO L225 Difference]: With dead ends: 41 [2024-09-17 19:52:30,421 INFO L226 Difference]: Without dead ends: 41 [2024-09-17 19:52:30,421 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:30,423 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 7 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,426 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:30,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-17 19:52:30,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 37. [2024-09-17 19:52:30,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 26 states have internal predecessors, (32), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:52:30,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 46 transitions. [2024-09-17 19:52:30,431 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 46 transitions. Word has length 9 [2024-09-17 19:52:30,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,433 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 46 transitions. [2024-09-17 19:52:30,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (2), 1 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,434 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 46 transitions. [2024-09-17 19:52:30,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-17 19:52:30,434 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,435 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-17 19:52:30,435 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,435 INFO L85 PathProgramCache]: Analyzing trace with hash 398305833, now seen corresponding path program 1 times [2024-09-17 19:52:30,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38143435] [2024-09-17 19:52:30,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-17 19:52:30,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38143435] [2024-09-17 19:52:30,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38143435] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:30,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:30,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 19:52:30,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549331050] [2024-09-17 19:52:30,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:30,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:30,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:30,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:30,517 INFO L87 Difference]: Start difference. First operand 37 states and 46 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 19:52:30,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,573 INFO L93 Difference]: Finished difference Result 45 states and 55 transitions. [2024-09-17 19:52:30,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:52:30,573 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-17 19:52:30,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,574 INFO L225 Difference]: With dead ends: 45 [2024-09-17 19:52:30,574 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 19:52:30,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 19:52:30,575 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 76 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:30,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 19:52:30,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 37. [2024-09-17 19:52:30,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 26 states have internal predecessors, (31), 7 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:52:30,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-09-17 19:52:30,583 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 9 [2024-09-17 19:52:30,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,583 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-09-17 19:52:30,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 19:52:30,583 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-09-17 19:52:30,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-17 19:52:30,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,584 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-17 19:52:30,584 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,585 INFO L85 PathProgramCache]: Analyzing trace with hash 211986483, now seen corresponding path program 1 times [2024-09-17 19:52:30,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854764728] [2024-09-17 19:52:30,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,671 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854764728] [2024-09-17 19:52:30,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854764728] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:30,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:30,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-17 19:52:30,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362373487] [2024-09-17 19:52:30,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:30,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 19:52:30,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 19:52:30,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-17 19:52:30,673 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,765 INFO L93 Difference]: Finished difference Result 47 states and 55 transitions. [2024-09-17 19:52:30,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 19:52:30,766 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2024-09-17 19:52:30,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,767 INFO L225 Difference]: With dead ends: 47 [2024-09-17 19:52:30,767 INFO L226 Difference]: Without dead ends: 47 [2024-09-17 19:52:30,768 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-17 19:52:30,768 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,769 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:30,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-17 19:52:30,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2024-09-17 19:52:30,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 9 states have call successors, (9), 4 states have call predecessors, (9), 4 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 19:52:30,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2024-09-17 19:52:30,774 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 10 [2024-09-17 19:52:30,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,775 INFO L474 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2024-09-17 19:52:30,775 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.3333333333333333) internal successors, (8), 4 states have internal predecessors, (8), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,775 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2024-09-17 19:52:30,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 19:52:30,775 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,775 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,776 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-17 19:52:30,776 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,776 INFO L85 PathProgramCache]: Analyzing trace with hash 815752847, now seen corresponding path program 1 times [2024-09-17 19:52:30,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1170779095] [2024-09-17 19:52:30,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,824 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1170779095] [2024-09-17 19:52:30,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1170779095] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:30,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:30,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 19:52:30,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181353409] [2024-09-17 19:52:30,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:30,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:30,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:30,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:30,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:30,826 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:30,850 INFO L93 Difference]: Finished difference Result 59 states and 75 transitions. [2024-09-17 19:52:30,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:30,852 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-17 19:52:30,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:30,852 INFO L225 Difference]: With dead ends: 59 [2024-09-17 19:52:30,852 INFO L226 Difference]: Without dead ends: 59 [2024-09-17 19:52:30,853 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:30,853 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 9 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:30,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 118 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:30,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-17 19:52:30,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 55. [2024-09-17 19:52:30,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 36 states have (on average 1.25) internal successors, (45), 38 states have internal predecessors, (45), 11 states have call successors, (11), 5 states have call predecessors, (11), 5 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 19:52:30,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2024-09-17 19:52:30,865 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 14 [2024-09-17 19:52:30,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:30,865 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2024-09-17 19:52:30,865 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 5 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:30,865 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2024-09-17 19:52:30,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-17 19:52:30,866 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:30,867 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:30,867 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-17 19:52:30,867 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:30,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:30,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1887144096, now seen corresponding path program 1 times [2024-09-17 19:52:30,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:30,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379362817] [2024-09-17 19:52:30,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:30,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:30,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379362817] [2024-09-17 19:52:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379362817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935362089] [2024-09-17 19:52:30,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:30,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:30,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:30,994 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:30,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:52:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:31,036 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 19:52:31,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:31,096 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:31,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:31,223 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:31,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935362089] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:31,223 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:31,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-17 19:52:31,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861915296] [2024-09-17 19:52:31,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:31,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:52:31,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:31,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:52:31,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:52:31,225 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:31,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:31,489 INFO L93 Difference]: Finished difference Result 113 states and 130 transitions. [2024-09-17 19:52:31,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:52:31,489 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2024-09-17 19:52:31,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:31,490 INFO L225 Difference]: With dead ends: 113 [2024-09-17 19:52:31,490 INFO L226 Difference]: Without dead ends: 113 [2024-09-17 19:52:31,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:52:31,491 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 87 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 380 SdHoareTripleChecker+Invalid, 349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:31,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 380 Invalid, 349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:31,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-17 19:52:31,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-17 19:52:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 19:52:31,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-17 19:52:31,499 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 18 [2024-09-17 19:52:31,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:31,499 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-17 19:52:31,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 1.5) internal successors, (27), 11 states have internal predecessors, (27), 8 states have call successors, (8), 8 states have call predecessors, (8), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:31,499 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-17 19:52:31,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 19:52:31,500 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:31,500 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-17 19:52:31,513 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:52:31,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-17 19:52:31,701 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:31,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:31,701 INFO L85 PathProgramCache]: Analyzing trace with hash 2123869197, now seen corresponding path program 2 times [2024-09-17 19:52:31,702 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:31,702 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079971367] [2024-09-17 19:52:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:31,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:31,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 18 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:31,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079971367] [2024-09-17 19:52:31,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079971367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:31,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627543585] [2024-09-17 19:52:31,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:31,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:31,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:31,911 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:31,913 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:52:31,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-17 19:52:31,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:31,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 19:52:31,943 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:31,980 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-17 19:52:31,980 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:52:31,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627543585] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:31,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:52:31,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [15] total 18 [2024-09-17 19:52:31,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060993241] [2024-09-17 19:52:31,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:31,981 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:52:31,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:31,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:52:31,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:52:31,982 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:32,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:32,025 INFO L93 Difference]: Finished difference Result 112 states and 143 transitions. [2024-09-17 19:52:32,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:32,026 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-17 19:52:32,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:32,027 INFO L225 Difference]: With dead ends: 112 [2024-09-17 19:52:32,028 INFO L226 Difference]: Without dead ends: 112 [2024-09-17 19:52:32,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:52:32,028 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 6 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:32,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 81 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:32,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-17 19:52:32,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 109. [2024-09-17 19:52:32,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1666666666666667) internal successors, (84), 74 states have internal predecessors, (84), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 19:52:32,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-17 19:52:32,044 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 26 [2024-09-17 19:52:32,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:32,044 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-17 19:52:32,045 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:32,045 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-17 19:52:32,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-17 19:52:32,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:32,048 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:32,062 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:32,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:32,249 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:32,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:32,250 INFO L85 PathProgramCache]: Analyzing trace with hash 512134780, now seen corresponding path program 1 times [2024-09-17 19:52:32,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:32,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439773908] [2024-09-17 19:52:32,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:32,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:32,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,279 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:52:32,279 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:32,279 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439773908] [2024-09-17 19:52:32,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439773908] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:52:32,279 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:52:32,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 19:52:32,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84579153] [2024-09-17 19:52:32,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:52:32,279 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 19:52:32,280 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:32,280 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 19:52:32,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 19:52:32,280 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 19:52:32,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:32,313 INFO L93 Difference]: Finished difference Result 115 states and 146 transitions. [2024-09-17 19:52:32,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:52:32,313 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-17 19:52:32,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:32,314 INFO L225 Difference]: With dead ends: 115 [2024-09-17 19:52:32,314 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 19:52:32,314 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:52:32,315 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:32,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 57 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:52:32,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 19:52:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 107. [2024-09-17 19:52:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 71 states have (on average 1.1549295774647887) internal successors, (82), 72 states have internal predecessors, (82), 23 states have call successors, (23), 11 states have call predecessors, (23), 11 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-17 19:52:32,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 128 transitions. [2024-09-17 19:52:32,325 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 128 transitions. Word has length 28 [2024-09-17 19:52:32,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:32,325 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 128 transitions. [2024-09-17 19:52:32,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 19:52:32,325 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 128 transitions. [2024-09-17 19:52:32,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-17 19:52:32,326 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:32,326 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:32,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-17 19:52:32,326 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:32,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:32,327 INFO L85 PathProgramCache]: Analyzing trace with hash -1760453507, now seen corresponding path program 1 times [2024-09-17 19:52:32,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:32,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063328454] [2024-09-17 19:52:32,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:32,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:32,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:32,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,392 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-17 19:52:32,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063328454] [2024-09-17 19:52:32,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063328454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:32,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351905616] [2024-09-17 19:52:32,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:32,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:32,394 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:32,395 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:32,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:52:32,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:32,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:32,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:32,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:32,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:32,713 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:32,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351905616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:32,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:32,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 13, 13] total 25 [2024-09-17 19:52:32,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [594548105] [2024-09-17 19:52:32,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:32,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:52:32,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:32,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:52:32,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=516, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:32,714 INFO L87 Difference]: Start difference. First operand 107 states and 128 transitions. Second operand has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-17 19:52:33,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:33,023 INFO L93 Difference]: Finished difference Result 120 states and 147 transitions. [2024-09-17 19:52:33,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:52:33,023 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) Word has length 30 [2024-09-17 19:52:33,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:33,024 INFO L225 Difference]: With dead ends: 120 [2024-09-17 19:52:33,024 INFO L226 Difference]: Without dead ends: 118 [2024-09-17 19:52:33,025 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:52:33,025 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 100 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 469 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 506 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:33,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 303 Invalid, 506 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 469 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:33,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-17 19:52:33,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 109. [2024-09-17 19:52:33,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 72 states have (on average 1.1388888888888888) internal successors, (82), 74 states have internal predecessors, (82), 23 states have call successors, (23), 11 states have call predecessors, (23), 12 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2024-09-17 19:52:33,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 130 transitions. [2024-09-17 19:52:33,031 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 130 transitions. Word has length 30 [2024-09-17 19:52:33,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:33,031 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 130 transitions. [2024-09-17 19:52:33,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 17 states have internal predecessors, (50), 12 states have call successors, (15), 10 states have call predecessors, (15), 3 states have return successors, (4), 1 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-17 19:52:33,031 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 130 transitions. [2024-09-17 19:52:33,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 19:52:33,032 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:33,032 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:33,046 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:52:33,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 19:52:33,233 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:33,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:33,234 INFO L85 PathProgramCache]: Analyzing trace with hash 69552029, now seen corresponding path program 1 times [2024-09-17 19:52:33,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:33,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390018398] [2024-09-17 19:52:33,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:33,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:33,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:33,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:33,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 19:52:33,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:33,355 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:33,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390018398] [2024-09-17 19:52:33,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390018398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:33,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736677351] [2024-09-17 19:52:33,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:33,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:33,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:33,358 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:33,358 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:52:33,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:33,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:33,397 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:33,436 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:33,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:33,562 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:33,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736677351] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:33,562 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:33,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-17 19:52:33,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729095187] [2024-09-17 19:52:33,563 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:33,563 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:52:33,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:33,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:52:33,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=173, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:52:33,563 INFO L87 Difference]: Start difference. First operand 109 states and 130 transitions. Second operand has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:33,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:33,743 INFO L93 Difference]: Finished difference Result 115 states and 138 transitions. [2024-09-17 19:52:33,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:52:33,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-17 19:52:33,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:33,744 INFO L225 Difference]: With dead ends: 115 [2024-09-17 19:52:33,744 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 19:52:33,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 SyntacticMatches, 10 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:52:33,744 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 58 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:33,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 195 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:33,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 19:52:33,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 111. [2024-09-17 19:52:33,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 73 states have (on average 1.1369863013698631) internal successors, (83), 76 states have internal predecessors, (83), 23 states have call successors, (23), 11 states have call predecessors, (23), 13 states have return successors, (27), 23 states have call predecessors, (27), 23 states have call successors, (27) [2024-09-17 19:52:33,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 133 transitions. [2024-09-17 19:52:33,751 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 133 transitions. Word has length 32 [2024-09-17 19:52:33,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:33,751 INFO L474 AbstractCegarLoop]: Abstraction has 111 states and 133 transitions. [2024-09-17 19:52:33,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 11 states have internal predecessors, (34), 6 states have call successors, (7), 6 states have call predecessors, (7), 3 states have return successors, (3), 1 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-17 19:52:33,755 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 133 transitions. [2024-09-17 19:52:33,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-17 19:52:33,756 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:33,756 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:33,772 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:33,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:33,960 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:33,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:33,960 INFO L85 PathProgramCache]: Analyzing trace with hash -908221233, now seen corresponding path program 1 times [2024-09-17 19:52:33,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:33,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057035075] [2024-09-17 19:52:33,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:33,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:33,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 19:52:34,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 19:52:34,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,106 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 15 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 19:52:34,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057035075] [2024-09-17 19:52:34,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057035075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:34,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890213074] [2024-09-17 19:52:34,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:34,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:34,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:34,107 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:34,111 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:52:34,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:52:34,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:34,211 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 34 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:52:34,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:34,347 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 24 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:34,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890213074] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:34,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:34,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17, 17] total 19 [2024-09-17 19:52:34,348 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217405728] [2024-09-17 19:52:34,348 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:34,348 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:52:34,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:34,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:52:34,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:52:34,349 INFO L87 Difference]: Start difference. First operand 111 states and 133 transitions. Second operand has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:52:34,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:34,619 INFO L93 Difference]: Finished difference Result 133 states and 161 transitions. [2024-09-17 19:52:34,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:52:34,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-09-17 19:52:34,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:34,620 INFO L225 Difference]: With dead ends: 133 [2024-09-17 19:52:34,620 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 19:52:34,620 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 68 SyntacticMatches, 14 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:52:34,621 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 107 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 357 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 357 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:34,621 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [108 Valid, 157 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 357 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:34,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 19:52:34,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 125. [2024-09-17 19:52:34,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 83 states have (on average 1.144578313253012) internal successors, (95), 86 states have internal predecessors, (95), 25 states have call successors, (25), 13 states have call predecessors, (25), 15 states have return successors, (29), 25 states have call predecessors, (29), 25 states have call successors, (29) [2024-09-17 19:52:34,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 149 transitions. [2024-09-17 19:52:34,625 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 149 transitions. Word has length 39 [2024-09-17 19:52:34,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:34,625 INFO L474 AbstractCegarLoop]: Abstraction has 125 states and 149 transitions. [2024-09-17 19:52:34,626 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.111111111111111) internal successors, (38), 13 states have internal predecessors, (38), 8 states have call successors, (10), 8 states have call predecessors, (10), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-17 19:52:34,626 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 149 transitions. [2024-09-17 19:52:34,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-17 19:52:34,626 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:34,626 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:34,641 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:34,827 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-17 19:52:34,827 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:34,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -236551542, now seen corresponding path program 1 times [2024-09-17 19:52:34,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:34,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908343702] [2024-09-17 19:52:34,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:34,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:34,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:34,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:34,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 19:52:34,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,913 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-17 19:52:34,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908343702] [2024-09-17 19:52:34,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908343702] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:34,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647731439] [2024-09-17 19:52:34,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:34,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:34,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:34,915 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:34,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:52:34,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:34,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:52:34,952 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:35,097 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:35,097 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:35,314 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 37 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:35,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647731439] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:35,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:35,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 15, 15] total 20 [2024-09-17 19:52:35,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158627226] [2024-09-17 19:52:35,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:35,315 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:52:35,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:35,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:52:35,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:52:35,316 INFO L87 Difference]: Start difference. First operand 125 states and 149 transitions. Second operand has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:52:35,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:35,584 INFO L93 Difference]: Finished difference Result 136 states and 166 transitions. [2024-09-17 19:52:35,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:52:35,584 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) Word has length 44 [2024-09-17 19:52:35,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:35,585 INFO L225 Difference]: With dead ends: 136 [2024-09-17 19:52:35,585 INFO L226 Difference]: Without dead ends: 136 [2024-09-17 19:52:35,585 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 77 SyntacticMatches, 11 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:52:35,585 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 80 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:35,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 246 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:35,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2024-09-17 19:52:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 129. [2024-09-17 19:52:35,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 90 states have internal predecessors, (97), 25 states have call successors, (25), 13 states have call predecessors, (25), 17 states have return successors, (34), 25 states have call predecessors, (34), 25 states have call successors, (34) [2024-09-17 19:52:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 156 transitions. [2024-09-17 19:52:35,590 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 156 transitions. Word has length 44 [2024-09-17 19:52:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:35,590 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 156 transitions. [2024-09-17 19:52:35,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (15), 6 states have call predecessors, (15), 4 states have return successors, (9), 2 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-17 19:52:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 156 transitions. [2024-09-17 19:52:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-17 19:52:35,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:35,591 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:35,605 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 19:52:35,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 19:52:35,795 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:35,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:35,795 INFO L85 PathProgramCache]: Analyzing trace with hash 2138826648, now seen corresponding path program 1 times [2024-09-17 19:52:35,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:35,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684954440] [2024-09-17 19:52:35,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:35,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:35,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:35,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:35,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:36,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:36,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:36,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:36,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:36,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:36,082 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:52:36,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684954440] [2024-09-17 19:52:36,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684954440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:36,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172931592] [2024-09-17 19:52:36,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:36,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:36,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:36,088 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:36,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:52:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:36,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-17 19:52:36,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:36,185 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:52:36,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:52:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172931592] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:36,776 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-09-17 19:52:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508426502] [2024-09-17 19:52:36,776 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:36,776 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 19:52:36,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 19:52:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=792, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:52:36,777 INFO L87 Difference]: Start difference. First operand 129 states and 156 transitions. Second operand has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:37,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:37,231 INFO L93 Difference]: Finished difference Result 149 states and 186 transitions. [2024-09-17 19:52:37,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-17 19:52:37,231 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) Word has length 45 [2024-09-17 19:52:37,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:37,232 INFO L225 Difference]: With dead ends: 149 [2024-09-17 19:52:37,232 INFO L226 Difference]: Without dead ends: 149 [2024-09-17 19:52:37,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=1148, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 19:52:37,233 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 46 mSDsluCounter, 484 mSDsCounter, 0 mSdLazyCounter, 776 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 512 SdHoareTripleChecker+Invalid, 798 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 776 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:37,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 512 Invalid, 798 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 776 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:37,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-17 19:52:37,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 139. [2024-09-17 19:52:37,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 92 states have (on average 1.1304347826086956) internal successors, (104), 96 states have internal predecessors, (104), 26 states have call successors, (26), 13 states have call predecessors, (26), 19 states have return successors, (42), 29 states have call predecessors, (42), 26 states have call successors, (42) [2024-09-17 19:52:37,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 172 transitions. [2024-09-17 19:52:37,238 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 172 transitions. Word has length 45 [2024-09-17 19:52:37,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:37,239 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 172 transitions. [2024-09-17 19:52:37,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 27 states have (on average 1.7037037037037037) internal successors, (46), 20 states have internal predecessors, (46), 14 states have call successors, (14), 9 states have call predecessors, (14), 3 states have return successors, (7), 7 states have call predecessors, (7), 6 states have call successors, (7) [2024-09-17 19:52:37,239 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 172 transitions. [2024-09-17 19:52:37,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-17 19:52:37,240 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:37,240 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:37,253 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 19:52:37,444 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:37,445 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:37,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:37,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1824085626, now seen corresponding path program 1 times [2024-09-17 19:52:37,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:37,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592137486] [2024-09-17 19:52:37,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:37,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:37,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 19:52:37,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:37,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:37,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 19:52:37,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,632 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 11 proven. 30 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:52:37,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592137486] [2024-09-17 19:52:37,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592137486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:37,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879106553] [2024-09-17 19:52:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:37,633 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:37,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:37,635 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:37,636 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:52:37,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:37,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:52:37,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 25 proven. 20 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:52:37,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:37,922 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 14 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:52:37,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1879106553] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:37,923 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:37,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 21 [2024-09-17 19:52:37,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039576655] [2024-09-17 19:52:37,923 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:37,923 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:52:37,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:37,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:52:37,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:52:37,924 INFO L87 Difference]: Start difference. First operand 139 states and 172 transitions. Second operand has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-17 19:52:38,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:38,210 INFO L93 Difference]: Finished difference Result 155 states and 186 transitions. [2024-09-17 19:52:38,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 19:52:38,211 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) Word has length 46 [2024-09-17 19:52:38,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:38,211 INFO L225 Difference]: With dead ends: 155 [2024-09-17 19:52:38,211 INFO L226 Difference]: Without dead ends: 153 [2024-09-17 19:52:38,212 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 90 SyntacticMatches, 11 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:52:38,212 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 82 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 461 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:38,212 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 152 Invalid, 461 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:38,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-17 19:52:38,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2024-09-17 19:52:38,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 90 states have (on average 1.1222222222222222) internal successors, (101), 94 states have internal predecessors, (101), 26 states have call successors, (26), 15 states have call predecessors, (26), 18 states have return successors, (37), 26 states have call predecessors, (37), 26 states have call successors, (37) [2024-09-17 19:52:38,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 164 transitions. [2024-09-17 19:52:38,217 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 164 transitions. Word has length 46 [2024-09-17 19:52:38,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:38,218 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 164 transitions. [2024-09-17 19:52:38,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.65) internal successors, (53), 17 states have internal predecessors, (53), 10 states have call successors, (13), 6 states have call predecessors, (13), 5 states have return successors, (10), 5 states have call predecessors, (10), 6 states have call successors, (10) [2024-09-17 19:52:38,218 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 164 transitions. [2024-09-17 19:52:38,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-17 19:52:38,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:38,220 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:38,234 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 19:52:38,423 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:38,424 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:38,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:38,424 INFO L85 PathProgramCache]: Analyzing trace with hash -419169308, now seen corresponding path program 1 times [2024-09-17 19:52:38,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:38,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095248230] [2024-09-17 19:52:38,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 19:52:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:38,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:38,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:38,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 19:52:38,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 19:52:38,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,626 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:52:38,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095248230] [2024-09-17 19:52:38,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095248230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:38,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418660516] [2024-09-17 19:52:38,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:38,627 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:38,627 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:38,629 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:38,629 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:52:38,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:38,670 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 19:52:38,672 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:38,705 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:52:38,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:39,283 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 25 proven. 43 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-17 19:52:39,283 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418660516] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:39,283 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:39,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 25 [2024-09-17 19:52:39,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258543450] [2024-09-17 19:52:39,284 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:39,284 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 19:52:39,284 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:39,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 19:52:39,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=582, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:52:39,285 INFO L87 Difference]: Start difference. First operand 136 states and 164 transitions. Second operand has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:52:39,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:39,841 INFO L93 Difference]: Finished difference Result 176 states and 218 transitions. [2024-09-17 19:52:39,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-17 19:52:39,841 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) Word has length 65 [2024-09-17 19:52:39,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:39,842 INFO L225 Difference]: With dead ends: 176 [2024-09-17 19:52:39,842 INFO L226 Difference]: Without dead ends: 176 [2024-09-17 19:52:39,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1130, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 19:52:39,843 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 82 mSDsluCounter, 559 mSDsCounter, 0 mSdLazyCounter, 671 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 715 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 671 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:39,843 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 598 Invalid, 715 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 671 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:39,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2024-09-17 19:52:39,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2024-09-17 19:52:39,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 108 states have (on average 1.1388888888888888) internal successors, (123), 110 states have internal predecessors, (123), 32 states have call successors, (32), 17 states have call predecessors, (32), 20 states have return successors, (45), 34 states have call predecessors, (45), 32 states have call successors, (45) [2024-09-17 19:52:39,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 200 transitions. [2024-09-17 19:52:39,851 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 200 transitions. Word has length 65 [2024-09-17 19:52:39,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:39,851 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 200 transitions. [2024-09-17 19:52:39,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 18 states have internal predecessors, (53), 13 states have call successors, (18), 9 states have call predecessors, (18), 3 states have return successors, (10), 7 states have call predecessors, (10), 7 states have call successors, (10) [2024-09-17 19:52:39,852 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 200 transitions. [2024-09-17 19:52:39,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-09-17 19:52:39,856 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:39,856 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:39,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 19:52:40,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 19:52:40,056 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:40,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:40,057 INFO L85 PathProgramCache]: Analyzing trace with hash -86445099, now seen corresponding path program 2 times [2024-09-17 19:52:40,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:40,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857396386] [2024-09-17 19:52:40,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:40,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:40,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 19:52:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:40,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:40,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:40,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:40,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 19:52:40,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 19:52:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,182 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 31 proven. 35 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-17 19:52:40,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857396386] [2024-09-17 19:52:40,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857396386] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:40,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640007797] [2024-09-17 19:52:40,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:40,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:40,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:40,184 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:40,186 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:52:40,225 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:52:40,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:40,226 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:40,227 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:40,263 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 19:52:40,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 103 backedges. 37 proven. 35 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-17 19:52:40,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [640007797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:40,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:40,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-17 19:52:40,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9837423] [2024-09-17 19:52:40,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:40,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:52:40,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:40,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:52:40,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:52:40,378 INFO L87 Difference]: Start difference. First operand 162 states and 200 transitions. Second operand has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:52:40,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:40,589 INFO L93 Difference]: Finished difference Result 184 states and 222 transitions. [2024-09-17 19:52:40,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:52:40,590 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 66 [2024-09-17 19:52:40,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:40,591 INFO L225 Difference]: With dead ends: 184 [2024-09-17 19:52:40,591 INFO L226 Difference]: Without dead ends: 180 [2024-09-17 19:52:40,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 135 SyntacticMatches, 10 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2024-09-17 19:52:40,592 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 64 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:40,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 168 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:40,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-17 19:52:40,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 172. [2024-09-17 19:52:40,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 115 states have (on average 1.1391304347826088) internal successors, (131), 117 states have internal predecessors, (131), 34 states have call successors, (34), 18 states have call predecessors, (34), 21 states have return successors, (43), 36 states have call predecessors, (43), 34 states have call successors, (43) [2024-09-17 19:52:40,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 208 transitions. [2024-09-17 19:52:40,596 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 208 transitions. Word has length 66 [2024-09-17 19:52:40,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:40,596 INFO L474 AbstractCegarLoop]: Abstraction has 172 states and 208 transitions. [2024-09-17 19:52:40,596 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.857142857142857) internal successors, (40), 11 states have internal predecessors, (40), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:52:40,596 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 208 transitions. [2024-09-17 19:52:40,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-17 19:52:40,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:40,597 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 5, 5, 5, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-17 19:52:40,610 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-17 19:52:40,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-17 19:52:40,803 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:40,803 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:40,803 INFO L85 PathProgramCache]: Analyzing trace with hash -44229639, now seen corresponding path program 2 times [2024-09-17 19:52:40,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:40,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241100481] [2024-09-17 19:52:40,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:40,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:40,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 19:52:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:40,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:40,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:40,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:40,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 19:52:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:40,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:40,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 19:52:40,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 39 proven. 50 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2024-09-17 19:52:40,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:40,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241100481] [2024-09-17 19:52:40,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241100481] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:40,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125557948] [2024-09-17 19:52:40,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:40,964 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:40,964 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:40,966 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:40,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:52:41,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:52:41,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:41,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:52:41,011 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:41,073 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 66 proven. 46 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 19:52:41,073 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:41,255 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 50 proven. 53 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 19:52:41,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125557948] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:41,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:41,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 20 [2024-09-17 19:52:41,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290478833] [2024-09-17 19:52:41,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:41,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:52:41,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:41,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:52:41,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:52:41,256 INFO L87 Difference]: Start difference. First operand 172 states and 208 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-17 19:52:41,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:41,472 INFO L93 Difference]: Finished difference Result 174 states and 206 transitions. [2024-09-17 19:52:41,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:52:41,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) Word has length 78 [2024-09-17 19:52:41,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:41,473 INFO L225 Difference]: With dead ends: 174 [2024-09-17 19:52:41,473 INFO L226 Difference]: Without dead ends: 174 [2024-09-17 19:52:41,474 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 158 SyntacticMatches, 11 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=173, Invalid=819, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:52:41,474 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 74 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 362 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:41,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 152 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 362 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:41,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-09-17 19:52:41,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 164. [2024-09-17 19:52:41,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 109 states have (on average 1.128440366972477) internal successors, (123), 113 states have internal predecessors, (123), 32 states have call successors, (32), 18 states have call predecessors, (32), 21 states have return successors, (38), 32 states have call predecessors, (38), 32 states have call successors, (38) [2024-09-17 19:52:41,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 193 transitions. [2024-09-17 19:52:41,478 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 193 transitions. Word has length 78 [2024-09-17 19:52:41,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:41,478 INFO L474 AbstractCegarLoop]: Abstraction has 164 states and 193 transitions. [2024-09-17 19:52:41,478 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 16 states have internal predecessors, (55), 11 states have call successors, (17), 6 states have call predecessors, (17), 4 states have return successors, (13), 5 states have call predecessors, (13), 8 states have call successors, (13) [2024-09-17 19:52:41,478 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 193 transitions. [2024-09-17 19:52:41,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-17 19:52:41,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:41,479 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-09-17 19:52:41,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-17 19:52:41,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-17 19:52:41,680 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:41,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:41,680 INFO L85 PathProgramCache]: Analyzing trace with hash 2007748268, now seen corresponding path program 3 times [2024-09-17 19:52:41,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:41,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561750876] [2024-09-17 19:52:41,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:41,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:41,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:41,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:41,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:41,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:41,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:41,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:41,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:41,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:41,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 19:52:41,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 19:52:41,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 63 proven. 51 refuted. 0 times theorem prover too weak. 107 trivial. 0 not checked. [2024-09-17 19:52:41,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561750876] [2024-09-17 19:52:41,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561750876] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:41,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369849783] [2024-09-17 19:52:41,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:52:41,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:41,907 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:41,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:52:41,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 19:52:41,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:41,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 19:52:41,947 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-09-17 19:52:42,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 52 proven. 2 refuted. 0 times theorem prover too weak. 167 trivial. 0 not checked. [2024-09-17 19:52:42,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369849783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:42,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:42,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10, 10] total 27 [2024-09-17 19:52:42,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586047050] [2024-09-17 19:52:42,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:42,543 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 19:52:42,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:42,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 19:52:42,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2024-09-17 19:52:42,543 INFO L87 Difference]: Start difference. First operand 164 states and 193 transitions. Second operand has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-17 19:52:43,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:43,084 INFO L93 Difference]: Finished difference Result 219 states and 271 transitions. [2024-09-17 19:52:43,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:52:43,084 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) Word has length 92 [2024-09-17 19:52:43,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:43,086 INFO L225 Difference]: With dead ends: 219 [2024-09-17 19:52:43,087 INFO L226 Difference]: Without dead ends: 218 [2024-09-17 19:52:43,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 192 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 19:52:43,088 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:43,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 405 Invalid, 1068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 19:52:43,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-17 19:52:43,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 198. [2024-09-17 19:52:43,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 131 states have (on average 1.1145038167938932) internal successors, (146), 134 states have internal predecessors, (146), 39 states have call successors, (39), 19 states have call predecessors, (39), 26 states have return successors, (56), 44 states have call predecessors, (56), 39 states have call successors, (56) [2024-09-17 19:52:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 241 transitions. [2024-09-17 19:52:43,096 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 241 transitions. Word has length 92 [2024-09-17 19:52:43,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:43,096 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 241 transitions. [2024-09-17 19:52:43,096 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (16), 5 states have call predecessors, (16), 4 states have return successors, (11), 7 states have call predecessors, (11), 8 states have call successors, (11) [2024-09-17 19:52:43,096 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 241 transitions. [2024-09-17 19:52:43,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-17 19:52:43,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:43,097 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:43,110 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:43,301 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:43,301 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:43,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:43,302 INFO L85 PathProgramCache]: Analyzing trace with hash 2133555725, now seen corresponding path program 4 times [2024-09-17 19:52:43,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:43,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918764858] [2024-09-17 19:52:43,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:43,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:43,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:43,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:43,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:43,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:43,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:43,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:43,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:43,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 19:52:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 19:52:43,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:43,473 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 65 proven. 41 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2024-09-17 19:52:43,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918764858] [2024-09-17 19:52:43,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918764858] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:43,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333771348] [2024-09-17 19:52:43,473 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:52:43,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:43,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:43,476 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:43,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:52:43,521 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:52:43,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:43,522 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:52:43,523 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:43,631 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 76 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-17 19:52:43,631 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:44,016 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 74 proven. 81 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-17 19:52:44,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [333771348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:44,017 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:44,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15, 17] total 25 [2024-09-17 19:52:44,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990249653] [2024-09-17 19:52:44,017 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:44,017 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:52:44,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:44,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:52:44,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:52:44,018 INFO L87 Difference]: Start difference. First operand 198 states and 241 transitions. Second operand has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-17 19:52:44,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:44,387 INFO L93 Difference]: Finished difference Result 230 states and 273 transitions. [2024-09-17 19:52:44,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-17 19:52:44,387 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) Word has length 93 [2024-09-17 19:52:44,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:44,388 INFO L225 Difference]: With dead ends: 230 [2024-09-17 19:52:44,388 INFO L226 Difference]: Without dead ends: 216 [2024-09-17 19:52:44,389 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 188 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=242, Invalid=1164, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:52:44,389 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 108 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 836 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:44,389 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 288 Invalid, 836 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:44,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2024-09-17 19:52:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 197. [2024-09-17 19:52:44,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 134 states have (on average 1.1119402985074627) internal successors, (149), 133 states have internal predecessors, (149), 36 states have call successors, (36), 21 states have call predecessors, (36), 25 states have return successors, (46), 42 states have call predecessors, (46), 36 states have call successors, (46) [2024-09-17 19:52:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 231 transitions. [2024-09-17 19:52:44,395 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 231 transitions. Word has length 93 [2024-09-17 19:52:44,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:44,395 INFO L474 AbstractCegarLoop]: Abstraction has 197 states and 231 transitions. [2024-09-17 19:52:44,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.9583333333333335) internal successors, (71), 21 states have internal predecessors, (71), 14 states have call successors, (20), 5 states have call predecessors, (20), 6 states have return successors, (17), 7 states have call predecessors, (17), 11 states have call successors, (17) [2024-09-17 19:52:44,395 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 231 transitions. [2024-09-17 19:52:44,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-17 19:52:44,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:44,396 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1] [2024-09-17 19:52:44,409 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-17 19:52:44,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:44,600 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:44,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:44,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1488981553, now seen corresponding path program 5 times [2024-09-17 19:52:44,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:44,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074462105] [2024-09-17 19:52:44,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:44,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:44,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:44,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,712 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:44,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:44,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:44,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:44,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:44,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 19:52:44,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:44,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:44,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-17 19:52:44,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 82 proven. 54 refuted. 0 times theorem prover too weak. 146 trivial. 0 not checked. [2024-09-17 19:52:44,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074462105] [2024-09-17 19:52:44,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074462105] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:44,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115614758] [2024-09-17 19:52:44,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:52:44,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:44,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:44,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:44,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 19:52:44,839 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 19:52:44,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:44,841 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:52:44,843 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 129 proven. 67 refuted. 0 times theorem prover too weak. 86 trivial. 0 not checked. [2024-09-17 19:52:44,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 101 proven. 80 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-17 19:52:45,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115614758] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:45,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:45,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 17] total 28 [2024-09-17 19:52:45,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1221636920] [2024-09-17 19:52:45,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:45,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 19:52:45,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 19:52:45,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=660, Unknown=0, NotChecked=0, Total=756 [2024-09-17 19:52:45,308 INFO L87 Difference]: Start difference. First operand 197 states and 231 transitions. Second operand has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2024-09-17 19:52:45,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:45,687 INFO L93 Difference]: Finished difference Result 208 states and 240 transitions. [2024-09-17 19:52:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:52:45,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) Word has length 105 [2024-09-17 19:52:45,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:45,690 INFO L225 Difference]: With dead ends: 208 [2024-09-17 19:52:45,690 INFO L226 Difference]: Without dead ends: 208 [2024-09-17 19:52:45,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 214 SyntacticMatches, 10 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=1799, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:52:45,691 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 112 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 564 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 213 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:45,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 213 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 564 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:45,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-09-17 19:52:45,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 188. [2024-09-17 19:52:45,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.0930232558139534) internal successors, (141), 129 states have internal predecessors, (141), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (40), 36 states have call predecessors, (40), 32 states have call successors, (40) [2024-09-17 19:52:45,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 213 transitions. [2024-09-17 19:52:45,699 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 213 transitions. Word has length 105 [2024-09-17 19:52:45,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:45,699 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 213 transitions. [2024-09-17 19:52:45,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.962962962962963) internal successors, (80), 24 states have internal predecessors, (80), 16 states have call successors, (25), 6 states have call predecessors, (25), 7 states have return successors, (21), 9 states have call predecessors, (21), 13 states have call successors, (21) [2024-09-17 19:52:45,699 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 213 transitions. [2024-09-17 19:52:45,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 19:52:45,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:45,701 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 5, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-17 19:52:45,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:45,905 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:45,906 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:45,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:45,906 INFO L85 PathProgramCache]: Analyzing trace with hash -410047264, now seen corresponding path program 6 times [2024-09-17 19:52:45,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:45,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423070619] [2024-09-17 19:52:45,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:45,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:45,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:45,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:45,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:45,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:46,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:46,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:46,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:46,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:46,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 19:52:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:46,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:46,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:46,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:46,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 68 proven. 48 refuted. 0 times theorem prover too weak. 160 trivial. 0 not checked. [2024-09-17 19:52:46,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:46,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423070619] [2024-09-17 19:52:46,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [423070619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:46,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388334548] [2024-09-17 19:52:46,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:52:46,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:46,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:46,097 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:46,098 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 19:52:46,151 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 19:52:46,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:46,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 19:52:46,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:46,192 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-09-17 19:52:46,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:46,387 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 93 proven. 6 refuted. 0 times theorem prover too weak. 177 trivial. 0 not checked. [2024-09-17 19:52:46,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388334548] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:46,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:46,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9, 9] total 20 [2024-09-17 19:52:46,388 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069271581] [2024-09-17 19:52:46,388 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:46,388 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 19:52:46,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:46,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 19:52:46,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:52:46,389 INFO L87 Difference]: Start difference. First operand 188 states and 213 transitions. Second operand has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-17 19:52:46,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:46,567 INFO L93 Difference]: Finished difference Result 193 states and 215 transitions. [2024-09-17 19:52:46,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:52:46,567 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) Word has length 104 [2024-09-17 19:52:46,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:46,568 INFO L225 Difference]: With dead ends: 193 [2024-09-17 19:52:46,568 INFO L226 Difference]: Without dead ends: 191 [2024-09-17 19:52:46,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 225 SyntacticMatches, 4 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:52:46,568 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 51 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:46,569 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 187 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:46,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-17 19:52:46,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-09-17 19:52:46,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.0775193798449612) internal successors, (139), 129 states have internal predecessors, (139), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (39), 36 states have call predecessors, (39), 32 states have call successors, (39) [2024-09-17 19:52:46,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 210 transitions. [2024-09-17 19:52:46,576 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 210 transitions. Word has length 104 [2024-09-17 19:52:46,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:46,577 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 210 transitions. [2024-09-17 19:52:46,577 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 9 states have call successors, (15), 3 states have call predecessors, (15), 5 states have return successors, (14), 6 states have call predecessors, (14), 7 states have call successors, (14) [2024-09-17 19:52:46,577 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 210 transitions. [2024-09-17 19:52:46,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-17 19:52:46,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:46,577 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 7, 7, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-17 19:52:46,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-17 19:52:46,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-17 19:52:46,778 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:46,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:46,778 INFO L85 PathProgramCache]: Analyzing trace with hash -463797280, now seen corresponding path program 7 times [2024-09-17 19:52:46,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:46,778 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109104483] [2024-09-17 19:52:46,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:46,778 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:46,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-17 19:52:47,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:47,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:47,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 19:52:47,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:47,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,367 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-17 19:52:47,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:47,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109104483] [2024-09-17 19:52:47,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109104483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:47,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015346768] [2024-09-17 19:52:47,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:52:47,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:47,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:47,369 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:47,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 19:52:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:47,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-17 19:52:47,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:47,592 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-17 19:52:47,592 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:48,146 INFO L134 CoverageAnalysis]: Checked inductivity of 281 backedges. 0 proven. 129 refuted. 0 times theorem prover too weak. 152 trivial. 0 not checked. [2024-09-17 19:52:48,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015346768] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:48,146 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:48,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 36 [2024-09-17 19:52:48,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303664320] [2024-09-17 19:52:48,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:48,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:52:48,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:48,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:52:48,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1232, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:52:48,147 INFO L87 Difference]: Start difference. First operand 188 states and 210 transitions. Second operand has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-17 19:52:48,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:48,564 INFO L93 Difference]: Finished difference Result 191 states and 212 transitions. [2024-09-17 19:52:48,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:52:48,565 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) Word has length 105 [2024-09-17 19:52:48,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:48,565 INFO L225 Difference]: With dead ends: 191 [2024-09-17 19:52:48,566 INFO L226 Difference]: Without dead ends: 191 [2024-09-17 19:52:48,566 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 235 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=118, Invalid=1522, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:52:48,566 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 19 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 927 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 927 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:48,567 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 551 Invalid, 936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 927 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 19:52:48,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-17 19:52:48,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 188. [2024-09-17 19:52:48,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 129 states have (on average 1.069767441860465) internal successors, (138), 129 states have internal predecessors, (138), 32 states have call successors, (32), 22 states have call predecessors, (32), 25 states have return successors, (39), 36 states have call predecessors, (39), 32 states have call successors, (39) [2024-09-17 19:52:48,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 209 transitions. [2024-09-17 19:52:48,572 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 209 transitions. Word has length 105 [2024-09-17 19:52:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:48,573 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 209 transitions. [2024-09-17 19:52:48,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 1.5) internal successors, (51), 22 states have internal predecessors, (51), 12 states have call successors, (13), 5 states have call predecessors, (13), 7 states have return successors, (18), 18 states have call predecessors, (18), 8 states have call successors, (18) [2024-09-17 19:52:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 209 transitions. [2024-09-17 19:52:48,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-17 19:52:48,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:48,574 INFO L216 NwaCegarLoop]: trace histogram [12, 10, 10, 9, 8, 7, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-17 19:52:48,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-17 19:52:48,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:48,775 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:48,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:48,775 INFO L85 PathProgramCache]: Analyzing trace with hash 525010234, now seen corresponding path program 8 times [2024-09-17 19:52:48,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:48,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111730362] [2024-09-17 19:52:48,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:48,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:48,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:52:48,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:48,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:48,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:48,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:48,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-17 19:52:48,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-17 19:52:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 124 proven. 37 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-17 19:52:48,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111730362] [2024-09-17 19:52:48,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111730362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:48,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295345161] [2024-09-17 19:52:48,965 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:52:48,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:48,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:48,966 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:48,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 19:52:49,030 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:52:49,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:49,031 INFO L262 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:52:49,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:49,069 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 140 proven. 37 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-09-17 19:52:49,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 140 proven. 37 refuted. 0 times theorem prover too weak. 309 trivial. 0 not checked. [2024-09-17 19:52:49,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295345161] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:49,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:49,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-17 19:52:49,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618749350] [2024-09-17 19:52:49,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:49,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:52:49,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:49,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:52:49,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:52:49,229 INFO L87 Difference]: Start difference. First operand 188 states and 209 transitions. Second operand has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:52:49,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:49,398 INFO L93 Difference]: Finished difference Result 220 states and 232 transitions. [2024-09-17 19:52:49,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:52:49,399 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) Word has length 134 [2024-09-17 19:52:49,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:49,399 INFO L225 Difference]: With dead ends: 220 [2024-09-17 19:52:49,399 INFO L226 Difference]: Without dead ends: 211 [2024-09-17 19:52:49,400 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 291 SyntacticMatches, 10 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:52:49,400 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 71 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 349 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 349 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:49,400 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 231 Invalid, 380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 349 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:49,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-17 19:52:49,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2024-09-17 19:52:49,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 144 states have (on average 1.0555555555555556) internal successors, (152), 144 states have internal predecessors, (152), 31 states have call successors, (31), 27 states have call predecessors, (31), 29 states have return successors, (34), 34 states have call predecessors, (34), 31 states have call successors, (34) [2024-09-17 19:52:49,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 217 transitions. [2024-09-17 19:52:49,404 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 217 transitions. Word has length 134 [2024-09-17 19:52:49,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:49,404 INFO L474 AbstractCegarLoop]: Abstraction has 206 states and 217 transitions. [2024-09-17 19:52:49,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 11 states have internal predecessors, (41), 6 states have call successors, (11), 5 states have call predecessors, (11), 2 states have return successors, (7), 4 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:52:49,404 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 217 transitions. [2024-09-17 19:52:49,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2024-09-17 19:52:49,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:49,405 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 10, 9, 9, 9, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 3, 2, 1, 1, 1] [2024-09-17 19:52:49,417 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:49,605 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:49,605 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:49,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:49,606 INFO L85 PathProgramCache]: Analyzing trace with hash -739295778, now seen corresponding path program 9 times [2024-09-17 19:52:49,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:49,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051479790] [2024-09-17 19:52:49,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:49,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:49,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:52:49,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:49,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:49,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:49,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:49,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:49,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:49,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-17 19:52:49,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:49,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:49,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-17 19:52:49,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:49,838 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 150 proven. 52 refuted. 0 times theorem prover too weak. 369 trivial. 0 not checked. [2024-09-17 19:52:49,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051479790] [2024-09-17 19:52:49,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051479790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:49,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261844596] [2024-09-17 19:52:49,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:52:49,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:49,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:49,840 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:49,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 19:52:49,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 19:52:49,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:49,884 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 19:52:49,886 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:49,957 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2024-09-17 19:52:49,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:50,234 INFO L134 CoverageAnalysis]: Checked inductivity of 571 backedges. 128 proven. 6 refuted. 0 times theorem prover too weak. 437 trivial. 0 not checked. [2024-09-17 19:52:50,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261844596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:50,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:50,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 24 [2024-09-17 19:52:50,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951602388] [2024-09-17 19:52:50,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:50,234 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 19:52:50,234 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:50,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 19:52:50,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-17 19:52:50,235 INFO L87 Difference]: Start difference. First operand 206 states and 217 transitions. Second operand has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-17 19:52:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:50,620 INFO L93 Difference]: Finished difference Result 204 states and 212 transitions. [2024-09-17 19:52:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-17 19:52:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) Word has length 146 [2024-09-17 19:52:50,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:50,622 INFO L225 Difference]: With dead ends: 204 [2024-09-17 19:52:50,622 INFO L226 Difference]: Without dead ends: 189 [2024-09-17 19:52:50,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 316 SyntacticMatches, 4 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=255, Invalid=1385, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:52:50,623 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 86 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 763 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 323 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:50,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 323 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 763 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:50,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-09-17 19:52:50,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 184. [2024-09-17 19:52:50,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 128 states have (on average 1.046875) internal successors, (134), 129 states have internal predecessors, (134), 28 states have call successors, (28), 24 states have call predecessors, (28), 26 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2024-09-17 19:52:50,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2024-09-17 19:52:50,626 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 146 [2024-09-17 19:52:50,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:50,626 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2024-09-17 19:52:50,626 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 20 states have internal predecessors, (59), 12 states have call successors, (18), 5 states have call predecessors, (18), 4 states have return successors, (14), 6 states have call predecessors, (14), 9 states have call successors, (14) [2024-09-17 19:52:50,626 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2024-09-17 19:52:50,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2024-09-17 19:52:50,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:50,627 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 10, 10, 9, 9, 6, 6, 6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 5, 4, 4, 3, 3, 1, 1, 1, 1] [2024-09-17 19:52:50,644 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-17 19:52:50,827 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 19:52:50,827 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:50,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:50,828 INFO L85 PathProgramCache]: Analyzing trace with hash 599930700, now seen corresponding path program 10 times [2024-09-17 19:52:50,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:50,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210235929] [2024-09-17 19:52:50,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:50,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:50,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:52:50,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:50,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:50,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:50,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 19:52:50,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:50,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:50,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:50,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-17 19:52:50,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:50,991 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 95 proven. 46 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-17 19:52:50,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210235929] [2024-09-17 19:52:50,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210235929] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:50,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327149504] [2024-09-17 19:52:50,992 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:52:50,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:50,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:50,994 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:50,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 19:52:51,060 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:52:51,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:51,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:52:51,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:51,174 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 113 proven. 190 refuted. 0 times theorem prover too weak. 333 trivial. 0 not checked. [2024-09-17 19:52:51,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 636 backedges. 113 proven. 198 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-17 19:52:51,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327149504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:51,838 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:51,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 14, 17] total 23 [2024-09-17 19:52:51,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273520271] [2024-09-17 19:52:51,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:51,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 19:52:51,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:51,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 19:52:51,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=428, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:52:51,840 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-17 19:52:52,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:52,026 INFO L93 Difference]: Finished difference Result 184 states and 191 transitions. [2024-09-17 19:52:52,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 19:52:52,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) Word has length 153 [2024-09-17 19:52:52,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:52,027 INFO L225 Difference]: With dead ends: 184 [2024-09-17 19:52:52,027 INFO L226 Difference]: Without dead ends: 184 [2024-09-17 19:52:52,027 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 324 SyntacticMatches, 9 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2024-09-17 19:52:52,028 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 66 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:52,028 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 193 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:52:52,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-17 19:52:52,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-17 19:52:52,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 128 states have (on average 1.0390625) internal successors, (133), 129 states have internal predecessors, (133), 28 states have call successors, (28), 24 states have call predecessors, (28), 26 states have return successors, (30), 30 states have call predecessors, (30), 28 states have call successors, (30) [2024-09-17 19:52:52,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 191 transitions. [2024-09-17 19:52:52,031 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 191 transitions. Word has length 153 [2024-09-17 19:52:52,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:52,031 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 191 transitions. [2024-09-17 19:52:52,031 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 3.3181818181818183) internal successors, (73), 21 states have internal predecessors, (73), 14 states have call successors, (20), 3 states have call predecessors, (20), 7 states have return successors, (20), 8 states have call predecessors, (20), 13 states have call successors, (20) [2024-09-17 19:52:52,031 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 191 transitions. [2024-09-17 19:52:52,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-17 19:52:52,034 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:52,034 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 11, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 5, 5, 4, 4, 3, 2, 1, 1, 1] [2024-09-17 19:52:52,047 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-17 19:52:52,238 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 19:52:52,239 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:52,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:52,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1814789073, now seen corresponding path program 11 times [2024-09-17 19:52:52,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:52,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356470700] [2024-09-17 19:52:52,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:52,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:52:52,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:52,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:52,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:52,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,494 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:52,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:52,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:52,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:52,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 19:52:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:52,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:52,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-17 19:52:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:52,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:52,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:52,646 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 199 proven. 78 refuted. 0 times theorem prover too weak. 469 trivial. 0 not checked. [2024-09-17 19:52:52,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:52,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356470700] [2024-09-17 19:52:52,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356470700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:52,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439971701] [2024-09-17 19:52:52,647 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:52:52,647 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:52,647 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:52,648 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:52,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 19:52:52,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-17 19:52:52,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:52:52,739 INFO L262 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-17 19:52:52,741 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:53,215 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 151 proven. 250 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-17 19:52:53,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 746 backedges. 141 proven. 274 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-17 19:52:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439971701] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:55,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 25, 28] total 52 [2024-09-17 19:52:55,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306560704] [2024-09-17 19:52:55,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:55,199 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-17 19:52:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-17 19:52:55,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=184, Invalid=2572, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 19:52:55,200 INFO L87 Difference]: Start difference. First operand 184 states and 191 transitions. Second operand has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-17 19:52:56,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:56,991 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2024-09-17 19:52:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-17 19:52:56,992 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) Word has length 166 [2024-09-17 19:52:56,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:56,993 INFO L225 Difference]: With dead ends: 165 [2024-09-17 19:52:56,993 INFO L226 Difference]: Without dead ends: 165 [2024-09-17 19:52:56,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 346 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1286 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=566, Invalid=6744, Unknown=0, NotChecked=0, Total=7310 [2024-09-17 19:52:56,995 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 162 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 2052 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 410 SdHoareTripleChecker+Invalid, 2170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 2052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:56,995 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 410 Invalid, 2170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 2052 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-17 19:52:56,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2024-09-17 19:52:56,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2024-09-17 19:52:56,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 states have internal predecessors, (117), 25 states have call successors, (25), 23 states have call predecessors, (25), 23 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-17 19:52:56,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 167 transitions. [2024-09-17 19:52:56,997 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 167 transitions. Word has length 166 [2024-09-17 19:52:56,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:56,998 INFO L474 AbstractCegarLoop]: Abstraction has 165 states and 167 transitions. [2024-09-17 19:52:56,998 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 49 states have (on average 2.142857142857143) internal successors, (105), 42 states have internal predecessors, (105), 26 states have call successors, (31), 4 states have call predecessors, (31), 16 states have return successors, (37), 24 states have call predecessors, (37), 24 states have call successors, (37) [2024-09-17 19:52:56,998 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 167 transitions. [2024-09-17 19:52:56,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2024-09-17 19:52:56,999 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:52:56,999 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 10, 10, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 4, 4, 3, 2, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:57,012 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-17 19:52:57,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-17 19:52:57,203 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-17 19:52:57,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:52:57,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1269067487, now seen corresponding path program 1 times [2024-09-17 19:52:57,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:52:57,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71984249] [2024-09-17 19:52:57,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:57,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:52:57,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:57,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-17 19:52:57,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:57,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:57,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:57,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:57,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:57,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:57,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:58,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:58,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:58,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:58,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 19:52:58,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:58,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:58,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-17 19:52:58,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:58,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 19:52:58,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 19:52:58,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-17 19:52:58,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 19:52:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,443 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-17 19:52:58,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:52:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71984249] [2024-09-17 19:52:58,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71984249] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:52:58,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1727642154] [2024-09-17 19:52:58,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:52:58,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:52:58,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:52:58,446 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 19:52:58,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 19:52:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:52:58,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 417 conjuncts, 103 conjuncts are in the unsatisfiable core [2024-09-17 19:52:58,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:52:58,759 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-17 19:52:58,760 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:52:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 786 backedges. 0 proven. 267 refuted. 0 times theorem prover too weak. 519 trivial. 0 not checked. [2024-09-17 19:52:59,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1727642154] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:52:59,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:52:59,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-09-17 19:52:59,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540119419] [2024-09-17 19:52:59,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:52:59,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-17 19:52:59,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:52:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-17 19:52:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 19:52:59,208 INFO L87 Difference]: Start difference. First operand 165 states and 167 transitions. Second operand has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 19:52:59,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:52:59,435 INFO L93 Difference]: Finished difference Result 163 states and 165 transitions. [2024-09-17 19:52:59,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-17 19:52:59,435 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) Word has length 173 [2024-09-17 19:52:59,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:52:59,436 INFO L225 Difference]: With dead ends: 163 [2024-09-17 19:52:59,436 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:52:59,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 447 GetRequests, 413 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=85, Invalid=1175, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 19:52:59,436 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 0 mSDsluCounter, 873 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 907 SdHoareTripleChecker+Invalid, 897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 19:52:59,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 907 Invalid, 897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 19:52:59,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:52:59,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:52:59,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:52:59,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:52:59,437 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 173 [2024-09-17 19:52:59,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:52:59,437 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:52:59,437 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.2777777777777777) internal successors, (46), 19 states have internal predecessors, (46), 7 states have call successors, (9), 1 states have call predecessors, (9), 10 states have return successors, (23), 23 states have call predecessors, (23), 7 states have call successors, (23) [2024-09-17 19:52:59,437 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:52:59,437 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:52:59,439 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2024-09-17 19:52:59,439 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fibo2Err0ENSURES_VIOLATIONPOST_CONDITION (1 of 3 remaining) [2024-09-17 19:52:59,440 INFO L785 garLoopResultBuilder]: Registering result SAFE for location fibo1Err0ENSURES_VIOLATIONPOST_CONDITION (0 of 3 remaining) [2024-09-17 19:52:59,452 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-17 19:52:59,640 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-17 19:52:59,643 INFO L408 BasicCegarLoop]: Path program histogram: [11, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:52:59,645 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:52:59,646 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:52:59 BoogieIcfgContainer [2024-09-17 19:52:59,646 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:52:59,647 INFO L158 Benchmark]: Toolchain (without parser) took 30384.74ms. Allocated memory was 157.3MB in the beginning and 413.1MB in the end (delta: 255.9MB). Free memory was 128.5MB in the beginning and 241.0MB in the end (delta: -112.5MB). Peak memory consumption was 145.4MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 157.3MB. Free memory is still 132.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 130.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: CACSL2BoogieTranslator took 224.07ms. Allocated memory is still 157.3MB. Free memory was 128.0MB in the beginning and 114.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: Boogie Procedure Inliner took 21.79ms. Allocated memory is still 157.3MB. Free memory was 114.8MB in the beginning and 113.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: Boogie Preprocessor took 20.71ms. Allocated memory is still 157.3MB. Free memory was 113.8MB in the beginning and 112.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,647 INFO L158 Benchmark]: RCFGBuilder took 240.25ms. Allocated memory is still 157.3MB. Free memory was 111.7MB in the beginning and 98.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,648 INFO L158 Benchmark]: TraceAbstraction took 29874.09ms. Allocated memory was 157.3MB in the beginning and 413.1MB in the end (delta: 255.9MB). Free memory was 98.1MB in the beginning and 241.0MB in the end (delta: -142.9MB). Peak memory consumption was 116.0MB. Max. memory is 16.1GB. [2024-09-17 19:52:59,648 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 0.18ms. Allocated memory is still 157.3MB. Free memory is still 132.1MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.15ms. Allocated memory is still 157.3MB. Free memory is still 130.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 224.07ms. Allocated memory is still 157.3MB. Free memory was 128.0MB in the beginning and 114.8MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 21.79ms. Allocated memory is still 157.3MB. Free memory was 114.8MB in the beginning and 113.8MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.71ms. Allocated memory is still 157.3MB. Free memory was 113.8MB in the beginning and 112.2MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 240.25ms. Allocated memory is still 157.3MB. Free memory was 111.7MB in the beginning and 98.6MB in the end (delta: 13.1MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 29874.09ms. Allocated memory was 157.3MB in the beginning and 413.1MB in the end (delta: 255.9MB). Free memory was 98.1MB in the beginning and 241.0MB in the end (delta: -142.9MB). Peak memory consumption was 116.0MB. 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: 41]: 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: 19]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 9]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 29.8s, OverallIterations: 28, TraceHistogramMax: 13, PathProgramHistogramMax: 11, EmptinessCheckTime: 0.0s, AutomataDifference: 8.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1664 SdHoareTripleChecker+Valid, 5.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1586 mSDsluCounter, 7244 SdHoareTripleChecker+Invalid, 4.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 6526 mSDsCounter, 903 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12742 IncrementalHoareTripleChecker+Invalid, 13645 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 903 mSolverCounterUnsat, 718 mSDtfsCounter, 12742 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4474 GetRequests, 3659 SyntacticMatches, 116 SemanticMatches, 699 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4917 ImplicationChecksByTransitivity, 7.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=206occurred in iteration=24, InterpolantAutomatonStates: 495, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 28 MinimizatonAttempts, 192 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 15.6s InterpolantComputationTime, 3601 NumberOfCodeBlocks, 3336 NumberOfCodeBlocksAsserted, 75 NumberOfCheckSat, 5266 ConstructedInterpolants, 0 QuantifiedInterpolants, 12485 SizeOfPredicates, 84 NumberOfNonLiveVariables, 3738 ConjunctsInSsa, 499 ConjunctsInUnsatCore, 69 InterpolantComputations, 8 PerfectInterpolantSequences, 11612/15329 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 3 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-17 19:52:59,671 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