./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --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/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 13:05:36,910 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 13:05:36,952 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 13:05:36,955 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 13:05:36,955 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 13:05:36,976 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 13:05:36,976 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 13:05:36,976 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 13:05:36,977 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 13:05:36,977 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 13:05:36,977 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 13:05:36,978 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 13:05:36,978 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 13:05:36,978 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 13:05:36,978 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 13:05:36,979 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 13:05:36,982 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 13:05:36,982 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 13:05:36,982 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 13:05:36,982 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 13:05:36,983 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 13:05:36,983 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 13:05:36,983 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 13:05:36,983 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 13:05:36,984 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 13:05:36,984 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 13:05:36,985 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 13:05:36,985 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:05:36,985 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 13:05:36,985 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 13:05:36,985 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 13:05:36,985 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 13:05:36,986 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 13:05:36,986 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 13:05:36,986 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 13:05:36,988 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 13:05:36,989 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 13:05:36,989 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 13:05:37,171 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 13:05:37,188 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 13:05:37,190 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 13:05:37,191 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 13:05:37,191 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 13:05:37,192 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-20 13:05:38,353 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 13:05:38,504 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 13:05:38,505 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-20 13:05:38,511 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/bab69161a/eb0a9642c7ed40b0aef114c7ed3c3693/FLAG3227e3155 [2024-09-20 13:05:38,930 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/bab69161a/eb0a9642c7ed40b0aef114c7ed3c3693 [2024-09-20 13:05:38,933 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 13:05:38,933 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 13:05:38,936 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 13:05:38,936 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 13:05:38,940 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 13:05:38,940 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:05:38" (1/1) ... [2024-09-20 13:05:38,941 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5707630 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:38, skipping insertion in model container [2024-09-20 13:05:38,941 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 01:05:38" (1/1) ... [2024-09-20 13:05:38,953 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 13:05:39,087 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_4-1.c[946,959] [2024-09-20 13:05:39,092 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:05:39,106 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 13:05:39,119 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_4-1.c[946,959] [2024-09-20 13:05:39,119 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 13:05:39,131 INFO L204 MainTranslator]: Completed translation [2024-09-20 13:05:39,131 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39 WrapperNode [2024-09-20 13:05:39,131 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 13:05:39,132 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 13:05:39,132 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 13:05:39,132 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 13:05:39,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,142 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,147 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 13:05:39,147 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 13:05:39,148 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 13:05:39,148 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 13:05:39,148 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 13:05:39,154 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,155 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,156 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,167 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 13:05:39,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,167 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,172 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,172 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,174 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 13:05:39,175 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 13:05:39,176 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 13:05:39,176 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 13:05:39,176 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (1/1) ... [2024-09-20 13:05:39,181 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 13:05:39,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:39,201 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 13:05:39,206 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 13:05:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 13:05:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 13:05:39,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 13:05:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 13:05:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-20 13:05:39,241 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-20 13:05:39,241 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-20 13:05:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-20 13:05:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 13:05:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 13:05:39,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 13:05:39,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 13:05:39,292 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 13:05:39,294 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 13:05:39,424 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-20 13:05:39,424 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 13:05:39,445 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 13:05:39,447 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 13:05:39,447 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:05:39 BoogieIcfgContainer [2024-09-20 13:05:39,447 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 13:05:39,450 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 13:05:39,450 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 13:05:39,452 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 13:05:39,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 01:05:38" (1/3) ... [2024-09-20 13:05:39,454 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf91f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:05:39, skipping insertion in model container [2024-09-20 13:05:39,454 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 01:05:39" (2/3) ... [2024-09-20 13:05:39,455 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2bf91f05 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 01:05:39, skipping insertion in model container [2024-09-20 13:05:39,455 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:05:39" (3/3) ... [2024-09-20 13:05:39,456 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2024-09-20 13:05:39,469 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 13:05:39,470 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 13:05:39,512 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 13:05:39,517 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=All, 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;@4b4b0778, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 13:05:39,517 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 13:05:39,520 INFO L276 IsEmpty]: Start isEmpty. Operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 13:05:39,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 13:05:39,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:39,525 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:39,526 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:39,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:39,529 INFO L85 PathProgramCache]: Analyzing trace with hash -685851838, now seen corresponding path program 1 times [2024-09-20 13:05:39,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:39,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353173611] [2024-09-20 13:05:39,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:39,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:39,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:39,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:39,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:39,739 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 13:05:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353173611] [2024-09-20 13:05:39,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353173611] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:05:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:05:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:05:39,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322188409] [2024-09-20 13:05:39,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:05:39,746 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:05:39,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:39,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:05:39,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:05:39,764 INFO L87 Difference]: Start difference. First operand has 32 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 20 states have internal predecessors, (25), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 13:05:39,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:39,844 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-20 13:05:39,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:05:39,846 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-20 13:05:39,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:39,871 INFO L225 Difference]: With dead ends: 44 [2024-09-20 13:05:39,871 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 13:05:39,874 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:05:39,877 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:39,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 103 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:39,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 13:05:39,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-20 13:05:39,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 13:05:39,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-20 13:05:39,927 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2024-09-20 13:05:39,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:39,927 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-20 13:05:39,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 13:05:39,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:39,928 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-20 13:05:39,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 13:05:39,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:39,929 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:39,929 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 13:05:39,929 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:39,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:39,930 INFO L85 PathProgramCache]: Analyzing trace with hash 924954813, now seen corresponding path program 1 times [2024-09-20 13:05:39,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:39,930 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462450868] [2024-09-20 13:05:39,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:39,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:39,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:39,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:39,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:39,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:39,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,016 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 13:05:40,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:40,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462450868] [2024-09-20 13:05:40,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462450868] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 13:05:40,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 13:05:40,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 13:05:40,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220196301] [2024-09-20 13:05:40,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 13:05:40,021 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 13:05:40,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:40,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 13:05:40,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:05:40,023 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 13:05:40,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:40,071 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-09-20 13:05:40,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 13:05:40,071 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 14 [2024-09-20 13:05:40,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:40,072 INFO L225 Difference]: With dead ends: 36 [2024-09-20 13:05:40,072 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 13:05:40,073 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 13:05:40,074 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 7 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:40,074 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 13:05:40,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 13:05:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-20 13:05:40,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 19 states have internal predecessors, (22), 7 states have call successors, (7), 4 states have call predecessors, (7), 4 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-20 13:05:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-20 13:05:40,080 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2024-09-20 13:05:40,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:40,081 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-20 13:05:40,081 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 states have internal predecessors, (9), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 13:05:40,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:40,082 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-20 13:05:40,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 13:05:40,082 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:40,082 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:40,083 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 13:05:40,083 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:40,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:40,083 INFO L85 PathProgramCache]: Analyzing trace with hash -1782416332, now seen corresponding path program 1 times [2024-09-20 13:05:40,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:40,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548787440] [2024-09-20 13:05:40,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:40,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:40,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 13:05:40,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,223 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:40,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548787440] [2024-09-20 13:05:40,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548787440] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:40,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61504408] [2024-09-20 13:05:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:40,224 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:40,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:40,225 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 13:05:40,226 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 13:05:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:05:40,272 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:40,350 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:40,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:40,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61504408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:40,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:40,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-09-20 13:05:40,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16989509] [2024-09-20 13:05:40,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:40,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:05:40,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:40,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:05:40,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:05:40,543 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:05:40,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:40,681 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-20 13:05:40,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:05:40,682 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) Word has length 26 [2024-09-20 13:05:40,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:40,683 INFO L225 Difference]: With dead ends: 58 [2024-09-20 13:05:40,684 INFO L226 Difference]: Without dead ends: 34 [2024-09-20 13:05:40,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:05:40,687 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:40,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 160 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:40,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-20 13:05:40,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-20 13:05:40,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 21 states have internal predecessors, (23), 7 states have call successors, (7), 4 states have call predecessors, (7), 5 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-20 13:05:40,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-20 13:05:40,696 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2024-09-20 13:05:40,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:40,697 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-20 13:05:40,697 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.2) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (10), 1 states have call predecessors, (10), 4 states have return successors, (9), 3 states have call predecessors, (9), 8 states have call successors, (9) [2024-09-20 13:05:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:40,697 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-20 13:05:40,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 13:05:40,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:40,698 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:40,710 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 13:05:40,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:40,900 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:40,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:40,900 INFO L85 PathProgramCache]: Analyzing trace with hash -836643613, now seen corresponding path program 1 times [2024-09-20 13:05:40,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:40,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703166117] [2024-09-20 13:05:40,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:40,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:40,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:40,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:40,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:40,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:41,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:41,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,061 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:41,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703166117] [2024-09-20 13:05:41,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703166117] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:41,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066318868] [2024-09-20 13:05:41,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:41,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:41,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:41,067 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 13:05:41,068 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 13:05:41,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,135 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:05:41,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:41,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:41,178 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:41,321 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 13:05:41,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066318868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:41,321 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:41,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-20 13:05:41,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951141123] [2024-09-20 13:05:41,322 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:41,322 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 13:05:41,322 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:41,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 13:05:41,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-20 13:05:41,323 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 13:05:41,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:41,467 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2024-09-20 13:05:41,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 13:05:41,468 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) Word has length 27 [2024-09-20 13:05:41,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:41,470 INFO L225 Difference]: With dead ends: 56 [2024-09-20 13:05:41,470 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 13:05:41,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2024-09-20 13:05:41,471 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:41,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 182 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:41,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 13:05:41,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-09-20 13:05:41,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 33 states have internal predecessors, (39), 11 states have call successors, (11), 6 states have call predecessors, (11), 7 states have return successors, (18), 10 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:05:41,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-09-20 13:05:41,483 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 27 [2024-09-20 13:05:41,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:41,484 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-09-20 13:05:41,484 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 2.909090909090909) internal successors, (32), 13 states have internal predecessors, (32), 8 states have call successors, (9), 1 states have call predecessors, (9), 3 states have return successors, (8), 4 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-20 13:05:41,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:41,485 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-09-20 13:05:41,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 13:05:41,487 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:41,487 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:41,499 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 13:05:41,690 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:41,691 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:41,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:41,692 INFO L85 PathProgramCache]: Analyzing trace with hash -925704228, now seen corresponding path program 1 times [2024-09-20 13:05:41,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:41,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252613948] [2024-09-20 13:05:41,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:41,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:41,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:41,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:41,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:41,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 13:05:41,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-20 13:05:41,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,800 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:05:41,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252613948] [2024-09-20 13:05:41,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1252613948] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:41,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1827184733] [2024-09-20 13:05:41,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:41,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:41,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:41,804 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 13:05:41,805 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 13:05:41,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:41,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:05:41,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:41,913 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 13:05:41,913 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:05:42,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1827184733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:42,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:42,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2024-09-20 13:05:42,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241683632] [2024-09-20 13:05:42,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:42,185 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 13:05:42,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 13:05:42,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-20 13:05:42,186 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 13:05:42,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:42,374 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2024-09-20 13:05:42,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:05:42,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) Word has length 39 [2024-09-20 13:05:42,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:42,377 INFO L225 Difference]: With dead ends: 112 [2024-09-20 13:05:42,377 INFO L226 Difference]: Without dead ends: 68 [2024-09-20 13:05:42,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:05:42,378 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 38 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:42,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:42,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-20 13:05:42,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-09-20 13:05:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 41 states have (on average 1.2439024390243902) internal successors, (51), 44 states have internal predecessors, (51), 14 states have call successors, (14), 7 states have call predecessors, (14), 10 states have return successors, (30), 14 states have call predecessors, (30), 13 states have call successors, (30) [2024-09-20 13:05:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2024-09-20 13:05:42,395 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2024-09-20 13:05:42,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:42,395 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2024-09-20 13:05:42,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 15 states have internal predecessors, (47), 11 states have call successors, (15), 1 states have call predecessors, (15), 5 states have return successors, (14), 4 states have call predecessors, (14), 11 states have call successors, (14) [2024-09-20 13:05:42,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:42,395 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2024-09-20 13:05:42,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 13:05:42,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:42,397 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:42,410 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 13:05:42,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:42,599 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:42,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:42,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1261961157, now seen corresponding path program 1 times [2024-09-20 13:05:42,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:42,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811598486] [2024-09-20 13:05:42,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:42,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:42,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:42,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:42,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:42,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:05:42,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,710 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-20 13:05:42,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811598486] [2024-09-20 13:05:42,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811598486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:42,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [467057922] [2024-09-20 13:05:42,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:42,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:42,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:42,713 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 13:05:42,714 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 13:05:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:42,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:05:42,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:42,803 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 13:05:42,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 13:05:43,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [467057922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:43,038 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:43,038 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2024-09-20 13:05:43,038 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85183412] [2024-09-20 13:05:43,038 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:43,039 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:05:43,039 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:05:43,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:05:43,039 INFO L87 Difference]: Start difference. First operand 66 states and 95 transitions. Second operand has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 13:05:43,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:43,270 INFO L93 Difference]: Finished difference Result 182 states and 328 transitions. [2024-09-20 13:05:43,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:05:43,271 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) Word has length 40 [2024-09-20 13:05:43,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:43,273 INFO L225 Difference]: With dead ends: 182 [2024-09-20 13:05:43,276 INFO L226 Difference]: Without dead ends: 122 [2024-09-20 13:05:43,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 86 SyntacticMatches, 4 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-20 13:05:43,278 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:43,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 268 Invalid, 369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:05:43,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-20 13:05:43,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2024-09-20 13:05:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 64 states have (on average 1.21875) internal successors, (78), 67 states have internal predecessors, (78), 23 states have call successors, (23), 9 states have call predecessors, (23), 15 states have return successors, (64), 26 states have call predecessors, (64), 22 states have call successors, (64) [2024-09-20 13:05:43,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 165 transitions. [2024-09-20 13:05:43,302 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 165 transitions. Word has length 40 [2024-09-20 13:05:43,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:43,302 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 165 transitions. [2024-09-20 13:05:43,302 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.0625) internal successors, (49), 17 states have internal predecessors, (49), 10 states have call successors, (14), 1 states have call predecessors, (14), 7 states have return successors, (13), 7 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-20 13:05:43,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:43,303 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 165 transitions. [2024-09-20 13:05:43,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-20 13:05:43,304 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:43,305 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:43,319 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 13:05:43,505 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:43,505 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:43,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:43,506 INFO L85 PathProgramCache]: Analyzing trace with hash 1624375296, now seen corresponding path program 1 times [2024-09-20 13:05:43,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:43,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024658753] [2024-09-20 13:05:43,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:43,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:43,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:43,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:43,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:43,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:43,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:05:43,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-20 13:05:43,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,642 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 13:05:43,642 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024658753] [2024-09-20 13:05:43,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024658753] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:43,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312904362] [2024-09-20 13:05:43,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:43,643 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:43,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:43,644 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 13:05:43,646 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 13:05:43,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:43,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:05:43,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:43,735 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 13:05:43,736 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:43,996 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 13:05:43,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312904362] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:43,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:43,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2024-09-20 13:05:43,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53314416] [2024-09-20 13:05:43,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:43,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 13:05:43,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:43,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 13:05:43,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-09-20 13:05:43,998 INFO L87 Difference]: Start difference. First operand 103 states and 165 transitions. Second operand has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:05:44,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:44,196 INFO L93 Difference]: Finished difference Result 265 states and 513 transitions. [2024-09-20 13:05:44,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 13:05:44,197 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) Word has length 54 [2024-09-20 13:05:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:44,199 INFO L225 Difference]: With dead ends: 265 [2024-09-20 13:05:44,199 INFO L226 Difference]: Without dead ends: 168 [2024-09-20 13:05:44,200 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-20 13:05:44,201 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 303 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:44,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 185 Invalid, 303 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 274 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:05:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-20 13:05:44,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2024-09-20 13:05:44,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 89 states have (on average 1.202247191011236) internal successors, (107), 91 states have internal predecessors, (107), 33 states have call successors, (33), 12 states have call predecessors, (33), 19 states have return successors, (104), 38 states have call predecessors, (104), 32 states have call successors, (104) [2024-09-20 13:05:44,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-09-20 13:05:44,238 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2024-09-20 13:05:44,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:44,239 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-09-20 13:05:44,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 3.533333333333333) internal successors, (53), 16 states have internal predecessors, (53), 10 states have call successors, (17), 1 states have call predecessors, (17), 6 states have return successors, (18), 9 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-20 13:05:44,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:44,239 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-09-20 13:05:44,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 13:05:44,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:44,241 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:44,255 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 13:05:44,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 13:05:44,442 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1735862535, now seen corresponding path program 1 times [2024-09-20 13:05:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692653077] [2024-09-20 13:05:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:44,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:44,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:44,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:44,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:44,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:44,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:05:44,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 13:05:44,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,602 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 13:05:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692653077] [2024-09-20 13:05:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692653077] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513645384] [2024-09-20 13:05:44,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:44,603 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:44,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:44,604 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:05:44,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 13:05:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:44,642 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 13:05:44,644 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:44,682 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 13:05:44,683 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:44,835 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-20 13:05:44,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513645384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:44,835 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:44,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2024-09-20 13:05:44,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994155296] [2024-09-20 13:05:44,836 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:44,836 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:05:44,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:44,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:05:44,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:05:44,837 INFO L87 Difference]: Start difference. First operand 142 states and 244 transitions. Second operand has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-20 13:05:45,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:45,074 INFO L93 Difference]: Finished difference Result 347 states and 700 transitions. [2024-09-20 13:05:45,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 13:05:45,075 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) Word has length 55 [2024-09-20 13:05:45,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:45,078 INFO L225 Difference]: With dead ends: 347 [2024-09-20 13:05:45,078 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 13:05:45,080 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:05:45,080 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 379 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:45,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 286 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 379 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:05:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 13:05:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2024-09-20 13:05:45,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 61 states have (on average 1.180327868852459) internal successors, (72), 62 states have internal predecessors, (72), 22 states have call successors, (22), 9 states have call predecessors, (22), 13 states have return successors, (65), 25 states have call predecessors, (65), 21 states have call successors, (65) [2024-09-20 13:05:45,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2024-09-20 13:05:45,101 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 55 [2024-09-20 13:05:45,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:45,102 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2024-09-20 13:05:45,102 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.3125) internal successors, (53), 17 states have internal predecessors, (53), 8 states have call successors, (16), 1 states have call predecessors, (16), 6 states have return successors, (17), 10 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-20 13:05:45,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2024-09-20 13:05:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-20 13:05:45,105 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:45,106 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:45,117 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 13:05:45,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:45,306 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:45,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:45,307 INFO L85 PathProgramCache]: Analyzing trace with hash 1987254780, now seen corresponding path program 2 times [2024-09-20 13:05:45,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:45,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214492059] [2024-09-20 13:05:45,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:45,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:45,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:45,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:45,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,397 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:45,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:45,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:45,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:05:45,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 13:05:45,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:45,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:45,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:45,485 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 13:05:45,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214492059] [2024-09-20 13:05:45,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214492059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:45,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350798921] [2024-09-20 13:05:45,485 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 13:05:45,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:45,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:45,486 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:05:45,487 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 13:05:45,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 13:05:45,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 13:05:45,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 13:05:45,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-20 13:05:45,611 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:45,890 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-20 13:05:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350798921] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:45,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:45,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2024-09-20 13:05:45,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072126818] [2024-09-20 13:05:45,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:45,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 13:05:45,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:45,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 13:05:45,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-20 13:05:45,893 INFO L87 Difference]: Start difference. First operand 97 states and 159 transitions. Second operand has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-20 13:05:46,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:46,193 INFO L93 Difference]: Finished difference Result 192 states and 339 transitions. [2024-09-20 13:05:46,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 13:05:46,194 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) Word has length 69 [2024-09-20 13:05:46,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:46,195 INFO L225 Difference]: With dead ends: 192 [2024-09-20 13:05:46,195 INFO L226 Difference]: Without dead ends: 89 [2024-09-20 13:05:46,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2024-09-20 13:05:46,196 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 63 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:46,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 274 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 13:05:46,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-20 13:05:46,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-09-20 13:05:46,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 53 states have (on average 1.150943396226415) internal successors, (61), 52 states have internal predecessors, (61), 14 states have call successors, (14), 10 states have call predecessors, (14), 12 states have return successors, (32), 17 states have call predecessors, (32), 13 states have call successors, (32) [2024-09-20 13:05:46,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2024-09-20 13:05:46,207 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2024-09-20 13:05:46,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:46,208 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2024-09-20 13:05:46,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 3.2857142857142856) internal successors, (69), 22 states have internal predecessors, (69), 12 states have call successors, (21), 1 states have call predecessors, (21), 9 states have return successors, (23), 14 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-20 13:05:46,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:46,208 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2024-09-20 13:05:46,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-20 13:05:46,209 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:46,209 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:46,221 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 13:05:46,413 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:46,414 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:46,414 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:46,414 INFO L85 PathProgramCache]: Analyzing trace with hash -2144655573, now seen corresponding path program 1 times [2024-09-20 13:05:46,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:46,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457190396] [2024-09-20 13:05:46,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:46,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:46,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:46,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:46,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:46,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:46,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:46,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:46,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-20 13:05:46,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-20 13:05:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:46,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,731 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-20 13:05:46,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457190396] [2024-09-20 13:05:46,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457190396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:46,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693699369] [2024-09-20 13:05:46,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:46,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:46,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:46,734 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:05:46,735 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 13:05:46,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:46,788 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 13:05:46,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:46,882 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-20 13:05:46,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:47,042 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-20 13:05:47,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [693699369] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:47,043 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:47,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2024-09-20 13:05:47,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864296793] [2024-09-20 13:05:47,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:47,043 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 13:05:47,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:47,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 13:05:47,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:05:47,044 INFO L87 Difference]: Start difference. First operand 80 states and 107 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 13:05:47,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:47,128 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2024-09-20 13:05:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 13:05:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) Word has length 68 [2024-09-20 13:05:47,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:47,130 INFO L225 Difference]: With dead ends: 97 [2024-09-20 13:05:47,130 INFO L226 Difference]: Without dead ends: 93 [2024-09-20 13:05:47,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 157 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-09-20 13:05:47,131 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 0 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 176 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:47,131 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 587 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 176 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:47,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-20 13:05:47,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-09-20 13:05:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 59 states have (on average 1.1355932203389831) internal successors, (67), 58 states have internal predecessors, (67), 16 states have call successors, (16), 10 states have call predecessors, (16), 14 states have return successors, (39), 21 states have call predecessors, (39), 15 states have call successors, (39) [2024-09-20 13:05:47,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2024-09-20 13:05:47,146 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 68 [2024-09-20 13:05:47,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:47,146 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2024-09-20 13:05:47,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 12 states have internal predecessors, (32), 4 states have call successors, (8), 1 states have call predecessors, (8), 7 states have return successors, (13), 13 states have call predecessors, (13), 4 states have call successors, (13) [2024-09-20 13:05:47,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:47,146 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2024-09-20 13:05:47,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-20 13:05:47,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 13:05:47,147 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:47,160 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 13:05:47,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:47,348 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 13:05:47,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:47,349 INFO L85 PathProgramCache]: Analyzing trace with hash 2028010288, now seen corresponding path program 1 times [2024-09-20 13:05:47,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 13:05:47,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101734182] [2024-09-20 13:05:47,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:47,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 13:05:47,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 13:05:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 13:05:47,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:47,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,415 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:47,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:47,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:47,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-20 13:05:47,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-20 13:05:47,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-20 13:05:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-20 13:05:47,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,486 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-20 13:05:47,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 13:05:47,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101734182] [2024-09-20 13:05:47,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101734182] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 13:05:47,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799951058] [2024-09-20 13:05:47,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 13:05:47,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 13:05:47,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 13:05:47,489 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 13:05:47,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 13:05:47,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 13:05:47,532 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 13:05:47,534 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 13:05:47,590 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 13:05:47,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 13:05:47,954 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 13:05:47,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799951058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 13:05:47,954 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 13:05:47,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-09-20 13:05:47,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977103043] [2024-09-20 13:05:47,954 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 13:05:47,955 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 13:05:47,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 13:05:47,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 13:05:47,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-20 13:05:47,956 INFO L87 Difference]: Start difference. First operand 90 states and 122 transitions. Second operand has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 13:05:48,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 13:05:48,108 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2024-09-20 13:05:48,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 13:05:48,108 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 69 [2024-09-20 13:05:48,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 13:05:48,109 INFO L225 Difference]: With dead ends: 162 [2024-09-20 13:05:48,109 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 13:05:48,110 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-09-20 13:05:48,110 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 19 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 13:05:48,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 224 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 13:05:48,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 13:05:48,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 13:05:48,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 13:05:48,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 13:05:48,111 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2024-09-20 13:05:48,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 13:05:48,111 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 13:05:48,111 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 3.8125) internal successors, (61), 17 states have internal predecessors, (61), 11 states have call successors, (18), 1 states have call predecessors, (18), 7 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-20 13:05:48,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 13:05:48,112 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 13:05:48,112 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 13:05:48,114 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 13:05:48,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 13:05:48,318 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 13:05:48,322 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 13:05:48,324 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 13:05:50,179 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 13:05:50,197 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 01:05:50 BoogieIcfgContainer [2024-09-20 13:05:50,197 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 13:05:50,197 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 13:05:50,197 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 13:05:50,197 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 13:05:50,198 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 01:05:39" (3/4) ... [2024-09-20 13:05:50,200 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 13:05:50,241 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 13:05:50,241 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 13:05:50,241 INFO L158 Benchmark]: Toolchain (without parser) took 11307.85ms. Allocated memory was 163.6MB in the beginning and 377.5MB in the end (delta: 213.9MB). Free memory was 96.1MB in the beginning and 273.7MB in the end (delta: -177.6MB). Peak memory consumption was 37.9MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,241 INFO L158 Benchmark]: CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 13:05:50,242 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.20ms. Allocated memory is still 163.6MB. Free memory was 95.8MB in the beginning and 133.1MB in the end (delta: -37.3MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,242 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.12ms. Allocated memory is still 163.6MB. Free memory was 132.9MB in the beginning and 131.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,242 INFO L158 Benchmark]: Boogie Preprocessor took 26.02ms. Allocated memory is still 163.6MB. Free memory was 131.6MB in the beginning and 130.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,242 INFO L158 Benchmark]: RCFGBuilder took 271.87ms. Allocated memory is still 163.6MB. Free memory was 130.2MB in the beginning and 116.3MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,243 INFO L158 Benchmark]: TraceAbstraction took 10747.33ms. Allocated memory was 163.6MB in the beginning and 377.5MB in the end (delta: 213.9MB). Free memory was 116.1MB in the beginning and 275.8MB in the end (delta: -159.7MB). Peak memory consumption was 166.4MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,243 INFO L158 Benchmark]: Witness Printer took 43.61ms. Allocated memory is still 377.5MB. Free memory was 275.8MB in the beginning and 273.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 13:05:50,244 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.13ms. Allocated memory is still 109.1MB. Free memory is still 69.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.20ms. Allocated memory is still 163.6MB. Free memory was 95.8MB in the beginning and 133.1MB in the end (delta: -37.3MB). Peak memory consumption was 10.0MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.12ms. Allocated memory is still 163.6MB. Free memory was 132.9MB in the beginning and 131.6MB in the end (delta: 1.2MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 26.02ms. Allocated memory is still 163.6MB. Free memory was 131.6MB in the beginning and 130.2MB in the end (delta: 1.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 271.87ms. Allocated memory is still 163.6MB. Free memory was 130.2MB in the beginning and 116.3MB in the end (delta: 13.8MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 10747.33ms. Allocated memory was 163.6MB in the beginning and 377.5MB in the end (delta: 213.9MB). Free memory was 116.1MB in the beginning and 275.8MB in the end (delta: -159.7MB). Peak memory consumption was 166.4MB. Max. memory is 16.1GB. * Witness Printer took 43.61ms. Allocated memory is still 377.5MB. Free memory was 275.8MB in the beginning and 273.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 32 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 8.8s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 364 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 295 mSDsluCounter, 2557 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2223 mSDsCounter, 242 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2550 IncrementalHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 242 mSolverCounterUnsat, 334 mSDtfsCounter, 2550 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1186 GetRequests, 979 SyntacticMatches, 27 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 1.3s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=142occurred in iteration=7, InterpolantAutomatonStates: 143, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 11 MinimizatonAttempts, 90 StatesRemovedByMinimization, 10 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 4.2s InterpolantComputationTime, 921 NumberOfCodeBlocks, 921 NumberOfCodeBlocksAsserted, 21 NumberOfCheckSat, 1339 ConstructedInterpolants, 0 QuantifiedInterpolants, 2751 SizeOfPredicates, 16 NumberOfNonLiveVariables, 1164 ConjunctsInSsa, 99 ConjunctsInUnsatCore, 29 InterpolantComputations, 2 PerfectInterpolantSequences, 816/1143 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 19]: Procedure Contract for fibo2 Derived contract for procedure fibo2. Ensures: (((((\result == 1) && (\old(n) == 1)) || (\result == 0)) || (1 < \old(n))) && (((((\result == 1) && (\old(n) == 1)) || (\old(n) < 1)) || (3 < \old(n))) || ((\result == 1) && (2 == \old(n))))) - ProcedureContractResult [Line: 9]: Procedure Contract for fibo1 Derived contract for procedure fibo1. Ensures: (((((\result == 1) || (\old(n) < 1)) || (2 < \old(n))) && (((\result == 0) || (1 < \old(n))) || (\old(n) == 1))) && ((((3 == \old(n)) || (4 < \old(n))) || (\old(n) < 2)) || ((3 == \result) && (\old(n) == 4)))) RESULT: Ultimate proved your program to be correct! [2024-09-20 13:05:50,265 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE