./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c --full-output --witness-type correctness_witness --validate ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.yml/witness-2.1.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReachWitnessValidation.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c ../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.yml/witness-2.1.yml -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.positions.where.we.compute.the.hoare.annotation None --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:45:44,613 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:45:44,695 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:45:44,701 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:45:44,703 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:45:44,730 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:45:44,732 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:45:44,732 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:45:44,733 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:45:44,734 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:45:44,735 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:45:44,735 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:45:44,736 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:45:44,736 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:45:44,738 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:45:44,738 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:45:44,738 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:45:44,739 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:45:44,739 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:45:44,739 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:45:44,739 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:45:44,740 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:45:44,741 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:45:44,741 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:45:44,742 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:45:44,742 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:45:44,742 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:45:44,745 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:45:44,745 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:45:44,745 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:45:44,746 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:45:44,746 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:45:44,746 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:44,746 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:45:44,746 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:45:44,747 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:45:44,747 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:45:44,747 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:45:44,747 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:45:44,748 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:45:44,748 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:45:44,749 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:45:44,749 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-20 13:45:45,000 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:45:45,028 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:45:45,031 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:45:45,032 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:45:45,033 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:45:45,034 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2024-09-20 13:45:46,469 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:45:46,637 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:45:46,637 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_8-1.c [2024-09-20 13:45:46,644 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/03febab8c/0c149ce921244db0b3691cf5641dc402/FLAG5a23b49e2 [2024-09-20 13:45:46,658 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/03febab8c/0c149ce921244db0b3691cf5641dc402 [2024-09-20 13:45:46,660 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-20 13:45:46,662 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-20 13:45:46,663 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/fibo_2calls_8-1.yml/witness-2.1.yml [2024-09-20 13:45:46,713 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:45:46,715 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-20 13:45:46,717 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:46,717 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:45:46,722 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:45:46,723 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:46" (1/2) ... [2024-09-20 13:45:46,724 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2f41f6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:46, skipping insertion in model container [2024-09-20 13:45:46,724 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:45:46" (1/2) ... [2024-09-20 13:45:46,725 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@655fbbe0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:45:46, skipping insertion in model container [2024-09-20 13:45:46,726 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:46" (2/2) ... [2024-09-20 13:45:46,726 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d2f41f6 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:46, skipping insertion in model container [2024-09-20 13:45:46,726 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:46" (2/2) ... [2024-09-20 13:45:46,732 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-20 13:45:46,735 INFO L1541 ArrayList]: Function contract at [L19]: requires null, ensures (((((\old(n) < 6) || (\result == 13)) || (7 < \old(n))) && (((\result == 0) || (\old(n) == 1)) || (1 < \old(n)))) && (((\result == 1) || (\old(n) < 1)) || (3 < \old(n)))) [2024-09-20 13:45:46,735 INFO L1541 ArrayList]: Function contract at [L9]: requires null, ensures (((((\old(n) < 2) || (\old(n) == 4)) || (5 < \old(n))) && (((\result == 0) || ((\old(n) == 1) && (\result == 1))) || (2 < \old(n)))) && ((((\old(n) == 1) && (\result == 1)) || (\old(n) < 1)) || (2 < \old(n)))) [2024-09-20 13:45:46,753 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:45:46,920 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_8-1.c[947,960] [2024-09-20 13:45:46,926 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:46,943 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global [2024-09-20 13:45:47,003 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_8-1.c[947,960] [2024-09-20 13:45:47,006 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:45:47,042 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:45:47,046 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47 WrapperNode [2024-09-20 13:45:47,047 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:45:47,048 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:47,048 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:45:47,048 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:45:47,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,061 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,076 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 20 [2024-09-20 13:45:47,076 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:45:47,077 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:45:47,077 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:45:47,077 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:45:47,087 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,088 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,093 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,107 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 [2024-09-20 13:45:47,107 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,107 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,112 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,121 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,122 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:45:47,123 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:45:47,123 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:45:47,123 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:45:47,124 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (1/1) ... [2024-09-20 13:45:47,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:45:47,139 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:47,154 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) [2024-09-20 13:45:47,156 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 [2024-09-20 13:45:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:45:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-20 13:45:47,203 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-20 13:45:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-20 13:45:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-20 13:45:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-20 13:45:47,204 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:45:47,204 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:45:47,269 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:45:47,272 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:45:47,436 INFO L? ?]: Removed 13 outVars from TransFormulas that were not future-live. [2024-09-20 13:45:47,437 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:45:47,470 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:45:47,470 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:45:47,470 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:47 BoogieIcfgContainer [2024-09-20 13:45:47,471 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:45:47,473 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:45:47,474 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:45:47,476 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:45:47,477 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:45:46" (1/4) ... [2024-09-20 13:45:47,477 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb5093 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:45:47, skipping insertion in model container [2024-09-20 13:45:47,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 20.09 01:45:46" (2/4) ... [2024-09-20 13:45:47,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb5093 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:45:47, skipping insertion in model container [2024-09-20 13:45:47,478 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 20.09 01:45:47" (3/4) ... [2024-09-20 13:45:47,478 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@34eb5093 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 20.09 01:45:47, skipping insertion in model container [2024-09-20 13:45:47,479 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:45:47" (4/4) ... [2024-09-20 13:45:47,480 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_8-1.c [2024-09-20 13:45:47,492 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:45:47,493 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-09-20 13:45:47,541 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:45:47,548 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;@473b7801, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:45:47,548 INFO L337 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2024-09-20 13:45:47,552 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) [2024-09-20 13:45:47,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-20 13:45:47,560 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:47,560 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-20 13:45:47,561 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:47,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:47,574 INFO L85 PathProgramCache]: Analyzing trace with hash 83656213, now seen corresponding path program 1 times [2024-09-20 13:45:47,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:47,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117779214] [2024-09-20 13:45:47,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:47,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:47,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:47,819 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:47,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:47,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117779214] [2024-09-20 13:45:47,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117779214] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:47,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:47,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 13:45:47,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514218933] [2024-09-20 13:45:47,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:47,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:47,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:47,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:45:47,863 INFO L87 Difference]: Start difference. First operand has 28 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 20 states have internal predecessors, (25), 5 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:47,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:47,997 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2024-09-20 13:45:47,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:48,000 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-20 13:45:48,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:48,006 INFO L225 Difference]: With dead ends: 37 [2024-09-20 13:45:48,006 INFO L226 Difference]: Without dead ends: 35 [2024-09-20 13:45:48,008 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:48,012 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:48,014 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 103 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:48,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-20 13:45:48,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-20 13:45:48,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 24 states have internal predecessors, (28), 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) [2024-09-20 13:45:48,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 42 transitions. [2024-09-20 13:45:48,052 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 42 transitions. Word has length 5 [2024-09-20 13:45:48,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:48,052 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 42 transitions. [2024-09-20 13:45:48,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:48,053 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 42 transitions. [2024-09-20 13:45:48,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-20 13:45:48,054 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:48,054 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:48,055 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:45:48,055 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:48,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:48,057 INFO L85 PathProgramCache]: Analyzing trace with hash 422480245, now seen corresponding path program 1 times [2024-09-20 13:45:48,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:48,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920499627] [2024-09-20 13:45:48,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:48,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:48,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:48,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:48,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:48,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920499627] [2024-09-20 13:45:48,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920499627] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:48,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:48,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 13:45:48,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745434626] [2024-09-20 13:45:48,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:48,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:45:48,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:48,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:45:48,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:48,190 INFO L87 Difference]: Start difference. First operand 35 states and 42 transitions. Second operand has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:48,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:48,290 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-09-20 13:45:48,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:45:48,292 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-09-20 13:45:48,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:48,294 INFO L225 Difference]: With dead ends: 54 [2024-09-20 13:45:48,295 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:45:48,296 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:45:48,297 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 23 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:48,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 109 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:45:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 44. [2024-09-20 13:45:48,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 30 states have internal predecessors, (36), 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) [2024-09-20 13:45:48,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 54 transitions. [2024-09-20 13:45:48,309 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 54 transitions. Word has length 9 [2024-09-20 13:45:48,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:48,309 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 54 transitions. [2024-09-20 13:45:48,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.4) internal successors, (7), 5 states have internal predecessors, (7), 2 states have call successors, (2), 2 states have call predecessors, (2), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:48,310 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 54 transitions. [2024-09-20 13:45:48,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-20 13:45:48,310 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:48,310 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:48,310 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:45:48,311 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:48,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:48,311 INFO L85 PathProgramCache]: Analyzing trace with hash 211986483, now seen corresponding path program 1 times [2024-09-20 13:45:48,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:48,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695532379] [2024-09-20 13:45:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:48,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:48,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:48,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:48,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695532379] [2024-09-20 13:45:48,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695532379] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:48,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:48,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 13:45:48,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023950927] [2024-09-20 13:45:48,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:48,406 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 13:45:48,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:48,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 13:45:48,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:45:48,408 INFO L87 Difference]: Start difference. First operand 44 states and 54 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) [2024-09-20 13:45:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:48,522 INFO L93 Difference]: Finished difference Result 54 states and 65 transitions. [2024-09-20 13:45:48,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:45:48,522 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 [2024-09-20 13:45:48,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:48,524 INFO L225 Difference]: With dead ends: 54 [2024-09-20 13:45:48,525 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 13:45:48,525 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 [2024-09-20 13:45:48,527 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 24 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:48,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 149 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:48,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 13:45:48,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2024-09-20 13:45:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 36 states have internal predecessors, (43), 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) [2024-09-20 13:45:48,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2024-09-20 13:45:48,542 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 10 [2024-09-20 13:45:48,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:48,543 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2024-09-20 13:45:48,543 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) [2024-09-20 13:45:48,543 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2024-09-20 13:45:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 13:45:48,544 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:48,544 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:48,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 13:45:48,544 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:48,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:48,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1688882568, now seen corresponding path program 1 times [2024-09-20 13:45:48,546 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:48,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900705286] [2024-09-20 13:45:48,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:48,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:48,623 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:48,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:48,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900705286] [2024-09-20 13:45:48,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900705286] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:48,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:48,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-09-20 13:45:48,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782736569] [2024-09-20 13:45:48,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:48,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 13:45:48,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:48,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 13:45:48,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-09-20 13:45:48,628 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:48,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:48,707 INFO L93 Difference]: Finished difference Result 74 states and 96 transitions. [2024-09-20 13:45:48,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 13:45:48,708 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-09-20 13:45:48,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:48,711 INFO L225 Difference]: With dead ends: 74 [2024-09-20 13:45:48,711 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 13:45:48,711 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-09-20 13:45:48,712 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 21 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:48,712 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 121 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:45:48,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 13:45:48,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-20 13:45:48,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 40 states have (on average 1.275) internal successors, (51), 42 states have internal predecessors, (51), 13 states have call successors, (13), 6 states have call predecessors, (13), 6 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-20 13:45:48,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 77 transitions. [2024-09-20 13:45:48,725 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 77 transitions. Word has length 13 [2024-09-20 13:45:48,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:48,729 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 77 transitions. [2024-09-20 13:45:48,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:48,729 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 77 transitions. [2024-09-20 13:45:48,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 13:45:48,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:48,730 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:48,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 13:45:48,731 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:48,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:48,732 INFO L85 PathProgramCache]: Analyzing trace with hash 815752847, now seen corresponding path program 1 times [2024-09-20 13:45:48,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:48,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802836582] [2024-09-20 13:45:48,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:48,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:48,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:48,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:48,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:48,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802836582] [2024-09-20 13:45:48,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802836582] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:48,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558486211] [2024-09-20 13:45:48,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:48,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:48,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:48,885 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) [2024-09-20 13:45:48,887 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 13:45:48,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:48,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:45:48,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:49,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:49,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558486211] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:49,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:49,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 13:45:49,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786235429] [2024-09-20 13:45:49,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:49,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:45:49,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:45:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:45:49,140 INFO L87 Difference]: Start difference. First operand 62 states and 77 transitions. Second operand has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:49,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:49,429 INFO L93 Difference]: Finished difference Result 111 states and 131 transitions. [2024-09-20 13:45:49,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:45:49,429 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2024-09-20 13:45:49,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:49,430 INFO L225 Difference]: With dead ends: 111 [2024-09-20 13:45:49,431 INFO L226 Difference]: Without dead ends: 111 [2024-09-20 13:45:49,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:45:49,432 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 72 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:49,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 286 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:49,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-20 13:45:49,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 107. [2024-09-20 13:45:49,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 70 states have (on average 1.2142857142857142) internal successors, (85), 72 states have internal predecessors, (85), 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) [2024-09-20 13:45:49,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 131 transitions. [2024-09-20 13:45:49,441 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 131 transitions. Word has length 14 [2024-09-20 13:45:49,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:49,441 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 131 transitions. [2024-09-20 13:45:49,442 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 1.5) internal successors, (21), 9 states have internal predecessors, (21), 6 states have call successors, (6), 6 states have call predecessors, (6), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:49,442 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 131 transitions. [2024-09-20 13:45:49,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 13:45:49,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:49,443 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1] [2024-09-20 13:45:49,460 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 13:45:49,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:49,644 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:49,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:49,644 INFO L85 PathProgramCache]: Analyzing trace with hash 2123869197, now seen corresponding path program 1 times [2024-09-20 13:45:49,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:49,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314722571] [2024-09-20 13:45:49,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:49,645 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:49,875 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:49,875 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:49,875 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314722571] [2024-09-20 13:45:49,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314722571] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:49,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657986496] [2024-09-20 13:45:49,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:49,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:49,876 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:49,878 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) [2024-09-20 13:45:49,879 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 13:45:49,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:49,917 INFO L262 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 13:45:49,918 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:49,986 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:49,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:50,192 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:50,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657986496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:50,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:50,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 27 [2024-09-20 13:45:50,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402138612] [2024-09-20 13:45:50,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:50,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 13:45:50,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:50,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 13:45:50,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-09-20 13:45:50,195 INFO L87 Difference]: Start difference. First operand 107 states and 131 transitions. Second operand has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:50,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:50,851 INFO L93 Difference]: Finished difference Result 223 states and 263 transitions. [2024-09-20 13:45:50,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-20 13:45:50,852 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2024-09-20 13:45:50,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:50,854 INFO L225 Difference]: With dead ends: 223 [2024-09-20 13:45:50,857 INFO L226 Difference]: Without dead ends: 223 [2024-09-20 13:45:50,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=346, Invalid=1724, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 13:45:50,858 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 142 mSDsluCounter, 521 mSDsCounter, 0 mSdLazyCounter, 548 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:50,859 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 560 Invalid, 617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 548 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 13:45:50,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-20 13:45:50,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 215. [2024-09-20 13:45:50,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 142 states have (on average 1.1901408450704225) internal successors, (169), 144 states have internal predecessors, (169), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 13:45:50,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 263 transitions. [2024-09-20 13:45:50,888 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 263 transitions. Word has length 26 [2024-09-20 13:45:50,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:50,888 INFO L474 AbstractCegarLoop]: Abstraction has 215 states and 263 transitions. [2024-09-20 13:45:50,889 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 1.5) internal successors, (39), 15 states have internal predecessors, (39), 12 states have call successors, (12), 12 states have call predecessors, (12), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:50,890 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 263 transitions. [2024-09-20 13:45:50,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 13:45:50,890 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:50,891 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1] [2024-09-20 13:45:50,907 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 13:45:51,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 13:45:51,095 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:51,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:51,096 INFO L85 PathProgramCache]: Analyzing trace with hash -698684055, now seen corresponding path program 2 times [2024-09-20 13:45:51,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:51,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904181664] [2024-09-20 13:45:51,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:51,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:51,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:51,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:51,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904181664] [2024-09-20 13:45:51,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [904181664] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:51,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140689834] [2024-09-20 13:45:51,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:45:51,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:51,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:51,301 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) [2024-09-20 13:45:51,302 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 13:45:51,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 13:45:51,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:51,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 35 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:45:51,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:51,386 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-20 13:45:51,386 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:45:51,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140689834] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:51,387 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:45:51,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [16] total 20 [2024-09-20 13:45:51,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927121226] [2024-09-20 13:45:51,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:51,387 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:45:51,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:51,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:45:51,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:45:51,388 INFO L87 Difference]: Start difference. First operand 215 states and 263 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) [2024-09-20 13:45:51,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:51,437 INFO L93 Difference]: Finished difference Result 222 states and 285 transitions. [2024-09-20 13:45:51,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:45:51,437 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.75) internal successors, (11), 5 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2024-09-20 13:45:51,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:51,439 INFO L225 Difference]: With dead ends: 222 [2024-09-20 13:45:51,439 INFO L226 Difference]: Without dead ends: 222 [2024-09-20 13:45:51,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:45:51,440 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 70 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:51,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 70 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:51,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-20 13:45:51,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 217. [2024-09-20 13:45:51,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 144 states have (on average 1.1875) internal successors, (171), 146 states have internal predecessors, (171), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 13:45:51,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 265 transitions. [2024-09-20 13:45:51,459 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 265 transitions. Word has length 30 [2024-09-20 13:45:51,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:51,460 INFO L474 AbstractCegarLoop]: Abstraction has 217 states and 265 transitions. [2024-09-20 13:45:51,460 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) [2024-09-20 13:45:51,460 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 265 transitions. [2024-09-20 13:45:51,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 13:45:51,461 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:51,461 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1] [2024-09-20 13:45:51,478 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 13:45:51,661 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:45:51,662 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:51,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:51,662 INFO L85 PathProgramCache]: Analyzing trace with hash 755241594, now seen corresponding path program 2 times [2024-09-20 13:45:51,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:51,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672491221] [2024-09-20 13:45:51,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:51,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:51,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,045 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 39 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:52,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:52,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672491221] [2024-09-20 13:45:52,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672491221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:52,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203479012] [2024-09-20 13:45:52,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:45:52,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:52,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:52,050 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) [2024-09-20 13:45:52,056 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 13:45:52,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-20 13:45:52,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:45:52,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 13:45:52,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:52,122 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 13:45:52,124 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 13:45:52,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203479012] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:52,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 13:45:52,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [19] total 21 [2024-09-20 13:45:52,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273610522] [2024-09-20 13:45:52,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:52,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:45:52,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:52,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:45:52,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:45:52,127 INFO L87 Difference]: Start difference. First operand 217 states and 265 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:52,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:52,166 INFO L93 Difference]: Finished difference Result 224 states and 281 transitions. [2024-09-20 13:45:52,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:45:52,167 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-09-20 13:45:52,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:52,168 INFO L225 Difference]: With dead ends: 224 [2024-09-20 13:45:52,168 INFO L226 Difference]: Without dead ends: 224 [2024-09-20 13:45:52,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=387, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:45:52,170 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 39 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 39 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:52,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 59 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 39 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:52,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-20 13:45:52,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 219. [2024-09-20 13:45:52,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 146 states have (on average 1.1849315068493151) internal successors, (173), 148 states have internal predecessors, (173), 47 states have call successors, (47), 23 states have call predecessors, (47), 23 states have return successors, (47), 47 states have call predecessors, (47), 47 states have call successors, (47) [2024-09-20 13:45:52,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 267 transitions. [2024-09-20 13:45:52,196 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 267 transitions. Word has length 34 [2024-09-20 13:45:52,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:52,197 INFO L474 AbstractCegarLoop]: Abstraction has 219 states and 267 transitions. [2024-09-20 13:45:52,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 1 states have call successors, (3), 1 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:45:52,199 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 267 transitions. [2024-09-20 13:45:52,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 13:45:52,200 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:52,200 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:52,221 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 13:45:52,401 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:52,401 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:52,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:52,402 INFO L85 PathProgramCache]: Analyzing trace with hash 635903209, now seen corresponding path program 1 times [2024-09-20 13:45:52,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:52,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617064778] [2024-09-20 13:45:52,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:52,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:52,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 13:45:52,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,648 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:52,648 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617064778] [2024-09-20 13:45:52,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617064778] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:45:52,648 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045754380] [2024-09-20 13:45:52,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:52,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:52,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:45:52,650 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) [2024-09-20 13:45:52,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 13:45:52,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:52,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 13:45:52,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:45:52,779 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:52,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:45:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 9 proven. 33 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 13:45:52,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045754380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:45:52,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:45:52,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-20 13:45:52,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591837877] [2024-09-20 13:45:52,977 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:45:52,977 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 13:45:52,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:52,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 13:45:52,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2024-09-20 13:45:52,978 INFO L87 Difference]: Start difference. First operand 219 states and 267 transitions. Second operand has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:53,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:53,293 INFO L93 Difference]: Finished difference Result 236 states and 291 transitions. [2024-09-20 13:45:53,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:45:53,293 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 13:45:53,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:53,297 INFO L225 Difference]: With dead ends: 236 [2024-09-20 13:45:53,297 INFO L226 Difference]: Without dead ends: 236 [2024-09-20 13:45:53,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 56 SyntacticMatches, 14 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2024-09-20 13:45:53,299 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 87 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 368 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 368 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:53,299 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 252 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 368 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:45:53,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2024-09-20 13:45:53,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 229. [2024-09-20 13:45:53,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 152 states have (on average 1.1842105263157894) internal successors, (180), 155 states have internal predecessors, (180), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2024-09-20 13:45:53,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 283 transitions. [2024-09-20 13:45:53,316 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 283 transitions. Word has length 36 [2024-09-20 13:45:53,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:53,317 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 283 transitions. [2024-09-20 13:45:53,317 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.8333333333333333) internal successors, (33), 12 states have internal predecessors, (33), 8 states have call successors, (8), 8 states have call predecessors, (8), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:53,317 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 283 transitions. [2024-09-20 13:45:53,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:45:53,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:53,319 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:53,337 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 13:45:53,519 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:45:53,520 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting fibo2Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:53,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:53,521 INFO L85 PathProgramCache]: Analyzing trace with hash -346895470, now seen corresponding path program 1 times [2024-09-20 13:45:53,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:53,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195957579] [2024-09-20 13:45:53,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:53,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:53,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:53,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-20 13:45:53,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:45:53,590 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-20 13:45:53,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:45:53,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195957579] [2024-09-20 13:45:53,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195957579] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:45:53,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:45:53,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 13:45:53,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737374588] [2024-09-20 13:45:53,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:45:53,592 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 13:45:53,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:45:53,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 13:45:53,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:45:53,593 INFO L87 Difference]: Start difference. First operand 229 states and 283 transitions. Second operand has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:53,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:45:53,629 INFO L93 Difference]: Finished difference Result 233 states and 296 transitions. [2024-09-20 13:45:53,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 13:45:53,629 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 13:45:53,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:45:53,631 INFO L225 Difference]: With dead ends: 233 [2024-09-20 13:45:53,631 INFO L226 Difference]: Without dead ends: 233 [2024-09-20 13:45:53,631 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 13:45:53,632 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 7 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:45:53,632 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:45:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-20 13:45:53,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 229. [2024-09-20 13:45:53,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 152 states have (on average 1.1842105263157894) internal successors, (180), 155 states have internal predecessors, (180), 49 states have call successors, (49), 24 states have call predecessors, (49), 25 states have return successors, (54), 49 states have call predecessors, (54), 49 states have call successors, (54) [2024-09-20 13:45:53,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 283 transitions. [2024-09-20 13:45:53,641 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 283 transitions. Word has length 40 [2024-09-20 13:45:53,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:45:53,641 INFO L474 AbstractCegarLoop]: Abstraction has 229 states and 283 transitions. [2024-09-20 13:45:53,642 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.333333333333333) internal successors, (13), 4 states have internal predecessors, (13), 1 states have call successors, (4), 1 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 13:45:53,642 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 283 transitions. [2024-09-20 13:45:53,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 13:45:53,643 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:45:53,643 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:53,643 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-20 13:45:53,643 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting fibo1Err0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, fibo2Err0ENSURES_VIOLATIONPOST_CONDITION, fibo1Err0ENSURES_VIOLATIONPOST_CONDITION] === [2024-09-20 13:45:53,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:45:53,644 INFO L85 PathProgramCache]: Analyzing trace with hash -671606166, now seen corresponding path program 1 times [2024-09-20 13:45:53,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:45:53,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351221777] [2024-09-20 13:45:53,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:45:53,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:45:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-20 13:45:53,660 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-09-20 13:45:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-09-20 13:45:53,697 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-09-20 13:45:53,698 INFO L326 BasicCegarLoop]: Counterexample is feasible [2024-09-20 13:45:53,700 INFO L785 garLoopResultBuilder]: Registering result UNSAFE for location fibo1Err0ENSURES_VIOLATIONPOST_CONDITION (2 of 3 remaining) [2024-09-20 13:45:53,701 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 3 remaining) [2024-09-20 13:45:53,702 INFO L785 garLoopResultBuilder]: Registering result UNKNOWN for location fibo2Err0ENSURES_VIOLATIONPOST_CONDITION (0 of 3 remaining) [2024-09-20 13:45:53,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-09-20 13:45:53,704 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:45:53,729 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:45:53,732 INFO L201 PluginConnector]: Adding new model witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:45:53 BoogieIcfgContainer [2024-09-20 13:45:53,732 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:45:53,732 INFO L158 Benchmark]: Toolchain (without parser) took 7017.66ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 98.8MB in the beginning and 134.6MB in the end (delta: -35.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,733 INFO L158 Benchmark]: CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,733 INFO L158 Benchmark]: Witness Parser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 100.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,733 INFO L158 Benchmark]: CACSL2BoogieTranslator took 330.22ms. Allocated memory is still 167.8MB. Free memory was 98.6MB in the beginning and 140.4MB in the end (delta: -41.8MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,733 INFO L158 Benchmark]: Boogie Procedure Inliner took 28.88ms. Allocated memory is still 167.8MB. Free memory was 140.4MB in the beginning and 138.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:45:53,734 INFO L158 Benchmark]: Boogie Preprocessor took 45.16ms. Allocated memory is still 167.8MB. Free memory was 138.8MB in the beginning and 137.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,734 INFO L158 Benchmark]: RCFGBuilder took 347.73ms. Allocated memory is still 167.8MB. Free memory was 137.6MB in the beginning and 123.6MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,734 INFO L158 Benchmark]: TraceAbstraction took 6258.85ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 122.9MB in the beginning and 134.6MB in the end (delta: -11.7MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. [2024-09-20 13:45:53,736 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.11ms. Allocated memory is still 113.2MB. Free memory is still 76.2MB. There was no memory consumed. Max. memory is 16.1GB. * Witness Parser took 0.16ms. Allocated memory is still 167.8MB. Free memory is still 100.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 330.22ms. Allocated memory is still 167.8MB. Free memory was 98.6MB in the beginning and 140.4MB in the end (delta: -41.8MB). Peak memory consumption was 15.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 28.88ms. Allocated memory is still 167.8MB. Free memory was 140.4MB in the beginning and 138.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 45.16ms. Allocated memory is still 167.8MB. Free memory was 138.8MB in the beginning and 137.6MB in the end (delta: 1.3MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 347.73ms. Allocated memory is still 167.8MB. Free memory was 137.6MB in the beginning and 123.6MB in the end (delta: 14.0MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 6258.85ms. Allocated memory was 167.8MB in the beginning and 201.3MB in the end (delta: 33.6MB). Free memory was 122.9MB in the beginning and 134.6MB in the end (delta: -11.7MB). Peak memory consumption was 23.6MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 9]: procedure postcondition can be violated procedure postcondition can be violated We found a FailurePath: [L38] int x = 8; VAL [x=8] [L39] CALL fibo1(x) VAL [\old(n)=8] [L10] COND FALSE !(n < 1) VAL [\old(n)=8, n=8] [L12] COND FALSE !(n == 1) VAL [\old(n)=8, n=8] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=7] [L20] COND FALSE !(n < 1) VAL [\old(n)=7, n=7] [L22] COND FALSE !(n == 1) VAL [\old(n)=7, n=7] [L25] CALL fibo1(n-1) VAL [\old(n)=6] [L10] COND FALSE !(n < 1) VAL [\old(n)=6, n=6] [L12] COND FALSE !(n == 1) VAL [\old(n)=6, n=6] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=5] [L20] COND FALSE !(n < 1) VAL [\old(n)=5, n=5] [L22] COND FALSE !(n == 1) VAL [\old(n)=5, n=5] [L25] CALL fibo1(n-1) VAL [\old(n)=4] [L10] COND FALSE !(n < 1) VAL [\old(n)=4, n=4] [L12] COND FALSE !(n == 1) VAL [\old(n)=4, n=4] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=3] [L20] COND FALSE !(n < 1) VAL [\old(n)=3, n=3] [L22] COND FALSE !(n == 1) VAL [\old(n)=3, n=3] [L25] CALL fibo1(n-1) VAL [\old(n)=2] [L10] COND FALSE !(n < 1) VAL [\old(n)=2, n=2] [L12] COND FALSE !(n == 1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-1) VAL [\old(n)=1] [L20] COND FALSE !(n < 1) VAL [\old(n)=1, n=1] [L22] COND TRUE n == 1 [L23] return 1; VAL [\old(n)=1, \result=1] [L15] RET, EXPR fibo2(n-1) VAL [\old(n)=2, n=2] [L15] CALL, EXPR fibo2(n-2) VAL [\old(n)=0] [L20] COND TRUE n < 1 [L21] return 0; VAL [\old(n)=0, \result=0] [L15] RET, EXPR fibo2(n-2) VAL [\old(n)=2, n=2] [L15] return fibo2(n-1) + fibo2(n-2); - UnprovableResult [Line: 41]: Unable to prove that a call to reach_error is unreachable Unable to prove that a call to reach_error is unreachable Reason: Not analyzed. - UnprovableResult [Line: 19]: Unable to prove that procedure postcondition always holds Unable to prove that procedure postcondition always holds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 28 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 6.2s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 425 SdHoareTripleChecker+Valid, 1.2s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 403 mSDsluCounter, 1769 SdHoareTripleChecker+Invalid, 1.0s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1472 mSDsCounter, 157 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 1520 IncrementalHoareTripleChecker+Invalid, 1677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 157 mSolverCounterUnsat, 297 mSDtfsCounter, 1520 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 346 GetRequests, 183 SyntacticMatches, 14 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=229occurred in iteration=9, InterpolantAutomatonStates: 104, 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, 10 MinimizatonAttempts, 56 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 2.4s InterpolantComputationTime, 400 NumberOfCodeBlocks, 352 NumberOfCodeBlocksAsserted, 16 NumberOfCheckSat, 415 ConstructedInterpolants, 0 QuantifiedInterpolants, 1013 SizeOfPredicates, 15 NumberOfNonLiveVariables, 303 ConjunctsInSsa, 52 ConjunctsInUnsatCore, 18 InterpolantComputations, 7 PerfectInterpolantSequences, 200/413 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2024-09-20 13:45:53,766 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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE