./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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 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 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 16:29:17,666 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 16:29:17,738 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 16:29:17,744 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 16:29:17,745 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 16:29:17,774 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 16:29:17,777 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 16:29:17,777 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 16:29:17,778 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 16:29:17,778 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 16:29:17,779 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 16:29:17,779 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 16:29:17,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 16:29:17,783 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 16:29:17,783 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 16:29:17,783 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 16:29:17,784 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 16:29:17,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 16:29:17,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 16:29:17,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 16:29:17,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 16:29:17,788 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 16:29:17,789 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 16:29:17,789 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 16:29:17,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 16:29:17,789 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 16:29:17,790 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 16:29:17,790 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 16:29:17,790 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 16:29:17,791 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 16:29:17,791 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 16:29:17,791 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 16:29:17,791 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:29:17,792 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 16:29:17,792 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 16:29:17,795 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 16:29:17,795 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 16:29:17,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 16:29:17,803 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 16:29:17,804 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 16:29:17,805 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 16:29:17,805 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 16:29:17,806 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0724aefed4fd629206cc51e19e964e04af92729823366947a0cfe01fe4e4d102 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 16:29:18,143 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 16:29:18,165 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 16:29:18,169 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 16:29:18,170 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 16:29:18,170 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 16:29:18,172 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-12 16:29:19,747 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 16:29:19,940 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 16:29:19,940 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/fibo_2calls_4-1.c [2024-09-12 16:29:19,948 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1d73593ab/94d37ec2e78c4a4e8cc3b234dcda1a1c/FLAG964e0c28a [2024-09-12 16:29:20,331 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1d73593ab/94d37ec2e78c4a4e8cc3b234dcda1a1c [2024-09-12 16:29:20,333 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 16:29:20,335 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 16:29:20,336 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 16:29:20,336 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 16:29:20,344 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 16:29:20,344 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,345 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@708583ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20, skipping insertion in model container [2024-09-12 16:29:20,345 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,368 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 16:29:20,507 WARN L247 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] [2024-09-12 16:29:20,512 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:29:20,530 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 16:29:20,547 WARN L247 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] [2024-09-12 16:29:20,549 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 16:29:20,567 INFO L204 MainTranslator]: Completed translation [2024-09-12 16:29:20,568 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20 WrapperNode [2024-09-12 16:29:20,568 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 16:29:20,569 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 16:29:20,569 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 16:29:20,569 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 16:29:20,581 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,586 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,593 INFO L138 Inliner]: procedures = 14, calls = 12, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 16:29:20,593 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 16:29:20,600 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 16:29:20,601 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 16:29:20,601 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 16:29:20,610 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,611 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,613 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,634 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]. [2024-09-12 16:29:20,635 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,635 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,639 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,641 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,642 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,646 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,647 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 16:29:20,648 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 16:29:20,648 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 16:29:20,649 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 16:29:20,649 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (1/1) ... [2024-09-12 16:29:20,656 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 16:29:20,668 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:20,685 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) [2024-09-12 16:29:20,692 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 [2024-09-12 16:29:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 16:29:20,739 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 16:29:20,740 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 16:29:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 16:29:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure fibo2 [2024-09-12 16:29:20,740 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo2 [2024-09-12 16:29:20,740 INFO L130 BoogieDeclarations]: Found specification of procedure fibo1 [2024-09-12 16:29:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure fibo1 [2024-09-12 16:29:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 16:29:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 16:29:20,742 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 16:29:20,742 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 16:29:20,809 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 16:29:20,811 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 16:29:20,973 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-12 16:29:20,974 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 16:29:20,995 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 16:29:20,995 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-12 16:29:20,997 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:29:20 BoogieIcfgContainer [2024-09-12 16:29:20,997 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 16:29:20,999 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 16:29:20,999 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 16:29:21,002 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 16:29:21,002 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 04:29:20" (1/3) ... [2024-09-12 16:29:21,002 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20665484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:29:21, skipping insertion in model container [2024-09-12 16:29:21,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 04:29:20" (2/3) ... [2024-09-12 16:29:21,003 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20665484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 04:29:21, skipping insertion in model container [2024-09-12 16:29:21,003 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:29:20" (3/3) ... [2024-09-12 16:29:21,004 INFO L112 eAbstractionObserver]: Analyzing ICFG fibo_2calls_4-1.c [2024-09-12 16:29:21,020 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 16:29:21,020 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 16:29:21,082 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 16:29:21,091 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;@36e79885, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 16:29:21,091 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 16:29:21,096 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) [2024-09-12 16:29:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-12 16:29:21,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:21,105 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:29:21,105 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:21,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:21,112 INFO L85 PathProgramCache]: Analyzing trace with hash -685851838, now seen corresponding path program 1 times [2024-09-12 16:29:21,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:21,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953720290] [2024-09-12 16:29:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:21,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:21,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:21,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:21,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:29:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953720290] [2024-09-12 16:29:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953720290] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:29:21,444 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:29:21,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:29:21,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026744781] [2024-09-12 16:29:21,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:29:21,450 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:29:21,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:21,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:29:21,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:29:21,476 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) [2024-09-12 16:29:21,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:21,566 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-12 16:29:21,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:29:21,569 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 [2024-09-12 16:29:21,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:21,577 INFO L225 Difference]: With dead ends: 44 [2024-09-12 16:29:21,577 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 16:29:21,580 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 [2024-09-12 16:29:21,583 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 10 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s 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 [2024-09-12 16:29:21,584 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] [2024-09-12 16:29:21,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 16:29:21,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-12 16:29:21,627 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) [2024-09-12 16:29:21,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-12 16:29:21,630 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 13 [2024-09-12 16:29:21,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:21,631 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-12 16:29:21,631 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) [2024-09-12 16:29:21,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:21,634 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-12 16:29:21,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-12 16:29:21,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:21,637 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:29:21,637 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 16:29:21,637 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:21,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:21,638 INFO L85 PathProgramCache]: Analyzing trace with hash 924954813, now seen corresponding path program 1 times [2024-09-12 16:29:21,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:21,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195646006] [2024-09-12 16:29:21,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:21,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:21,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:21,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:21,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 16:29:21,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:21,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195646006] [2024-09-12 16:29:21,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1195646006] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 16:29:21,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 16:29:21,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 16:29:21,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441154742] [2024-09-12 16:29:21,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 16:29:21,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 16:29:21,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:21,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 16:29:21,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 16:29:21,793 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) [2024-09-12 16:29:21,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:21,865 INFO L93 Difference]: Finished difference Result 36 states and 44 transitions. [2024-09-12 16:29:21,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 16:29:21,873 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 [2024-09-12 16:29:21,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:21,875 INFO L225 Difference]: With dead ends: 36 [2024-09-12 16:29:21,875 INFO L226 Difference]: Without dead ends: 32 [2024-09-12 16:29:21,876 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 [2024-09-12 16:29:21,877 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, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 16:29:21,877 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 88 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 16:29:21,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-12 16:29:21,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2024-09-12 16:29:21,891 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) [2024-09-12 16:29:21,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2024-09-12 16:29:21,894 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 14 [2024-09-12 16:29:21,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:21,894 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2024-09-12 16:29:21,895 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) [2024-09-12 16:29:21,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:21,896 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2024-09-12 16:29:21,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-12 16:29:21,897 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:21,898 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] [2024-09-12 16:29:21,898 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 16:29:21,899 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:21,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -1782416332, now seen corresponding path program 1 times [2024-09-12 16:29:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771772136] [2024-09-12 16:29:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:21,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:21,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:21,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:22,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-12 16:29:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,087 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:22,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:22,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771772136] [2024-09-12 16:29:22,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771772136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:22,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192929985] [2024-09-12 16:29:22,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:22,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:22,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:22,094 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) [2024-09-12 16:29:22,095 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 16:29:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 16:29:22,172 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:22,264 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:22,265 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:22,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:22,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1192929985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:22,484 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:22,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 13 [2024-09-12 16:29:22,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425588893] [2024-09-12 16:29:22,485 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:22,485 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:29:22,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:22,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:29:22,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:29:22,487 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) [2024-09-12 16:29:22,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:22,635 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-12 16:29:22,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:29:22,635 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 [2024-09-12 16:29:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:22,636 INFO L225 Difference]: With dead ends: 58 [2024-09-12 16:29:22,636 INFO L226 Difference]: Without dead ends: 34 [2024-09-12 16:29:22,637 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 [2024-09-12 16:29:22,638 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 [2024-09-12 16:29:22,638 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] [2024-09-12 16:29:22,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-12 16:29:22,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 32. [2024-09-12 16:29:22,645 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) [2024-09-12 16:29:22,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2024-09-12 16:29:22,646 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 26 [2024-09-12 16:29:22,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:22,647 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2024-09-12 16:29:22,648 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) [2024-09-12 16:29:22,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:22,648 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2024-09-12 16:29:22,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-12 16:29:22,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:22,649 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] [2024-09-12 16:29:22,667 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 16:29:22,850 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 [2024-09-12 16:29:22,850 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:22,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:22,851 INFO L85 PathProgramCache]: Analyzing trace with hash -836643613, now seen corresponding path program 1 times [2024-09-12 16:29:22,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:22,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297806957] [2024-09-12 16:29:22,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:22,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:22,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:22,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:22,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:22,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:22,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:23,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:23,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:23,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297806957] [2024-09-12 16:29:23,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297806957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:23,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964370861] [2024-09-12 16:29:23,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:23,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:23,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:23,035 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) [2024-09-12 16:29:23,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 16:29:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 16:29:23,079 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:23,128 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:23,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:23,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-12 16:29:23,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964370861] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:23,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:23,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 13 [2024-09-12 16:29:23,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878831916] [2024-09-12 16:29:23,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:23,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-12 16:29:23,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:23,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-12 16:29:23,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-12 16:29:23,335 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) [2024-09-12 16:29:23,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:23,553 INFO L93 Difference]: Finished difference Result 56 states and 77 transitions. [2024-09-12 16:29:23,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-12 16:29:23,554 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 [2024-09-12 16:29:23,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:23,556 INFO L225 Difference]: With dead ends: 56 [2024-09-12 16:29:23,556 INFO L226 Difference]: Without dead ends: 52 [2024-09-12 16:29:23,557 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 [2024-09-12 16:29:23,561 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:29:23,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 182 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:29:23,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-12 16:29:23,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 50. [2024-09-12 16:29:23,579 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) [2024-09-12 16:29:23,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-09-12 16:29:23,580 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 27 [2024-09-12 16:29:23,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:23,581 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-09-12 16:29:23,581 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) [2024-09-12 16:29:23,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:23,587 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-09-12 16:29:23,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 16:29:23,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:23,589 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] [2024-09-12 16:29:23,603 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 16:29:23,789 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 [2024-09-12 16:29:23,790 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:23,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:23,790 INFO L85 PathProgramCache]: Analyzing trace with hash -925704228, now seen corresponding path program 1 times [2024-09-12 16:29:23,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:23,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94149118] [2024-09-12 16:29:23,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:23,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:23,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:23,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:23,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,845 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:23,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:23,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-12 16:29:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 16:29:23,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,900 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:29:23,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94149118] [2024-09-12 16:29:23,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94149118] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:23,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405115273] [2024-09-12 16:29:23,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:23,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:23,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:23,903 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) [2024-09-12 16:29:23,905 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 16:29:23,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:23,954 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 16:29:23,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:24,032 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-12 16:29:24,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:29:24,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405115273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:24,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:24,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 9] total 15 [2024-09-12 16:29:24,358 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843841358] [2024-09-12 16:29:24,358 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:24,358 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 16:29:24,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:24,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 16:29:24,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2024-09-12 16:29:24,360 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) [2024-09-12 16:29:24,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:24,603 INFO L93 Difference]: Finished difference Result 112 states and 180 transitions. [2024-09-12 16:29:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:29:24,604 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 [2024-09-12 16:29:24,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:24,606 INFO L225 Difference]: With dead ends: 112 [2024-09-12 16:29:24,606 INFO L226 Difference]: Without dead ends: 68 [2024-09-12 16:29:24,607 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 84 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=336, Unknown=0, NotChecked=0, Total=420 [2024-09-12 16:29:24,608 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, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 16:29:24,608 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 200 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 16:29:24,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-12 16:29:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 66. [2024-09-12 16:29:24,623 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) [2024-09-12 16:29:24,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 95 transitions. [2024-09-12 16:29:24,626 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 95 transitions. Word has length 39 [2024-09-12 16:29:24,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:24,626 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 95 transitions. [2024-09-12 16:29:24,626 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) [2024-09-12 16:29:24,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:24,627 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 95 transitions. [2024-09-12 16:29:24,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 16:29:24,630 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:24,630 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] [2024-09-12 16:29:24,647 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 16:29:24,835 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 [2024-09-12 16:29:24,836 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:24,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:24,836 INFO L85 PathProgramCache]: Analyzing trace with hash -1261961157, now seen corresponding path program 1 times [2024-09-12 16:29:24,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:24,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131816601] [2024-09-12 16:29:24,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:24,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:24,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:24,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:24,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:24,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:24,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:24,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:24,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:24,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:24,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:24,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:25,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:29:25,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:25,022 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 16:29:25,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131816601] [2024-09-12 16:29:25,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131816601] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:25,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688209751] [2024-09-12 16:29:25,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:25,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:25,025 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:25,027 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) [2024-09-12 16:29:25,029 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 16:29:25,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:25,070 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 16:29:25,072 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 16:29:25,149 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:25,480 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 16:29:25,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688209751] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:25,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:25,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 9] total 17 [2024-09-12 16:29:25,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471929306] [2024-09-12 16:29:25,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:25,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:29:25,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:25,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:29:25,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-12 16:29:25,483 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) [2024-09-12 16:29:25,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:25,796 INFO L93 Difference]: Finished difference Result 182 states and 328 transitions. [2024-09-12 16:29:25,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:29:25,797 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 [2024-09-12 16:29:25,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:25,803 INFO L225 Difference]: With dead ends: 182 [2024-09-12 16:29:25,803 INFO L226 Difference]: Without dead ends: 122 [2024-09-12 16:29:25,805 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 [2024-09-12 16:29:25,805 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 37 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-12 16:29:25,806 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] [2024-09-12 16:29:25,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2024-09-12 16:29:25,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 103. [2024-09-12 16:29:25,842 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) [2024-09-12 16:29:25,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 165 transitions. [2024-09-12 16:29:25,844 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 165 transitions. Word has length 40 [2024-09-12 16:29:25,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:25,845 INFO L474 AbstractCegarLoop]: Abstraction has 103 states and 165 transitions. [2024-09-12 16:29:25,845 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) [2024-09-12 16:29:25,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:25,845 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 165 transitions. [2024-09-12 16:29:25,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 16:29:25,848 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:25,848 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] [2024-09-12 16:29:25,864 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 16:29:26,052 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 [2024-09-12 16:29:26,053 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:26,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:26,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1624375296, now seen corresponding path program 1 times [2024-09-12 16:29:26,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:26,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277008577] [2024-09-12 16:29:26,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:26,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:26,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:26,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:26,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:26,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:26,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:26,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:26,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:29:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-12 16:29:26,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,256 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 15 proven. 4 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 16:29:26,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277008577] [2024-09-12 16:29:26,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277008577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:26,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429166021] [2024-09-12 16:29:26,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:26,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:26,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:26,266 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) [2024-09-12 16:29:26,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 16:29:26,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:26,317 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 16:29:26,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:26,381 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 12 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 16:29:26,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:26,710 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 12 proven. 13 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-12 16:29:26,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1429166021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:26,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:26,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 9] total 16 [2024-09-12 16:29:26,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293891336] [2024-09-12 16:29:26,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:26,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-12 16:29:26,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:26,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-12 16:29:26,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2024-09-12 16:29:26,712 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) [2024-09-12 16:29:26,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:26,963 INFO L93 Difference]: Finished difference Result 265 states and 513 transitions. [2024-09-12 16:29:26,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 16:29:26,964 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 [2024-09-12 16:29:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:26,967 INFO L225 Difference]: With dead ends: 265 [2024-09-12 16:29:26,967 INFO L226 Difference]: Without dead ends: 168 [2024-09-12 16:29:26,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 118 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-12 16:29:26,970 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 24 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 274 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-12 16:29:26,970 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] [2024-09-12 16:29:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2024-09-12 16:29:26,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 142. [2024-09-12 16:29:26,999 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) [2024-09-12 16:29:27,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 244 transitions. [2024-09-12 16:29:27,002 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 244 transitions. Word has length 54 [2024-09-12 16:29:27,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:27,002 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 244 transitions. [2024-09-12 16:29:27,002 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) [2024-09-12 16:29:27,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:27,003 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 244 transitions. [2024-09-12 16:29:27,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 16:29:27,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:27,007 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] [2024-09-12 16:29:27,020 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 16:29:27,207 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 [2024-09-12 16:29:27,208 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:27,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:27,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1735862535, now seen corresponding path program 1 times [2024-09-12 16:29:27,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:27,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971431394] [2024-09-12 16:29:27,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:27,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:27,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:27,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:27,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:27,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:27,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:29:27,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 16:29:27,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 19 proven. 11 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 16:29:27,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:27,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971431394] [2024-09-12 16:29:27,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971431394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:27,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079450029] [2024-09-12 16:29:27,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:27,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:27,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:27,446 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) [2024-09-12 16:29:27,447 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 16:29:27,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:27,503 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 16:29:27,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:27,556 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 16:29:27,557 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:27,749 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 18 proven. 5 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-12 16:29:27,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079450029] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:27,750 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:27,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 7, 7] total 17 [2024-09-12 16:29:27,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155258095] [2024-09-12 16:29:27,750 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:27,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:29:27,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:27,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:29:27,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-12 16:29:27,753 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) [2024-09-12 16:29:28,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:28,047 INFO L93 Difference]: Finished difference Result 347 states and 700 transitions. [2024-09-12 16:29:28,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 16:29:28,048 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 [2024-09-12 16:29:28,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:28,051 INFO L225 Difference]: With dead ends: 347 [2024-09-12 16:29:28,051 INFO L226 Difference]: Without dead ends: 120 [2024-09-12 16:29:28,053 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 118 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=370, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:29:28,054 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 40 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 379 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s 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 [2024-09-12 16:29:28,054 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] [2024-09-12 16:29:28,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-12 16:29:28,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 97. [2024-09-12 16:29:28,072 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) [2024-09-12 16:29:28,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 159 transitions. [2024-09-12 16:29:28,075 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 159 transitions. Word has length 55 [2024-09-12 16:29:28,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:28,075 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 159 transitions. [2024-09-12 16:29:28,075 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) [2024-09-12 16:29:28,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:28,076 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 159 transitions. [2024-09-12 16:29:28,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-12 16:29:28,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:28,077 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] [2024-09-12 16:29:28,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-12 16:29:28,278 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 [2024-09-12 16:29:28,278 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:28,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:28,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1987254780, now seen corresponding path program 2 times [2024-09-12 16:29:28,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:28,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657555574] [2024-09-12 16:29:28,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:28,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:28,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:28,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:28,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:29:28,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 16:29:28,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:28,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:28,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:28,574 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 37 proven. 23 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 16:29:28,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657555574] [2024-09-12 16:29:28,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657555574] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:28,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707762363] [2024-09-12 16:29:28,575 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 16:29:28,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:28,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:28,577 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) [2024-09-12 16:29:28,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 16:29:28,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 16:29:28,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 16:29:28,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 16:29:28,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:28,715 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 8 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-12 16:29:28,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:29,062 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 38 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 16:29:29,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707762363] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:29,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:29,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 9] total 22 [2024-09-12 16:29:29,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591580647] [2024-09-12 16:29:29,063 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:29,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-12 16:29:29,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:29,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-12 16:29:29,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2024-09-12 16:29:29,065 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) [2024-09-12 16:29:29,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:29,468 INFO L93 Difference]: Finished difference Result 192 states and 339 transitions. [2024-09-12 16:29:29,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 16:29:29,469 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 [2024-09-12 16:29:29,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:29,471 INFO L225 Difference]: With dead ends: 192 [2024-09-12 16:29:29,471 INFO L226 Difference]: Without dead ends: 89 [2024-09-12 16:29:29,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 148 SyntacticMatches, 4 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=168, Invalid=824, Unknown=0, NotChecked=0, Total=992 [2024-09-12 16:29:29,475 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, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 16:29:29,475 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 274 Invalid, 501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 16:29:29,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-12 16:29:29,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 80. [2024-09-12 16:29:29,514 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) [2024-09-12 16:29:29,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 107 transitions. [2024-09-12 16:29:29,516 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 107 transitions. Word has length 69 [2024-09-12 16:29:29,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:29,517 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 107 transitions. [2024-09-12 16:29:29,517 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) [2024-09-12 16:29:29,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:29,517 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 107 transitions. [2024-09-12 16:29:29,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-12 16:29:29,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:29,520 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] [2024-09-12 16:29:29,538 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-12 16:29:29,721 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 [2024-09-12 16:29:29,722 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:29,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:29,722 INFO L85 PathProgramCache]: Analyzing trace with hash -2144655573, now seen corresponding path program 1 times [2024-09-12 16:29:29,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:29,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591809138] [2024-09-12 16:29:29,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:29,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:29,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:29,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:29,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:29,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:29,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:29,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:30,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:30,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 16:29:30,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-12 16:29:30,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:30,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,193 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-12 16:29:30,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:30,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591809138] [2024-09-12 16:29:30,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591809138] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:30,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1866058137] [2024-09-12 16:29:30,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:30,194 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:30,194 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:30,196 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) [2024-09-12 16:29:30,197 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 16:29:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,258 INFO L262 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 16:29:30,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:30,381 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-12 16:29:30,381 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:30,602 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 53 trivial. 0 not checked. [2024-09-12 16:29:30,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1866058137] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:30,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:30,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 21 [2024-09-12 16:29:30,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729887897] [2024-09-12 16:29:30,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:30,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 16:29:30,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:30,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 16:29:30,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=373, Unknown=0, NotChecked=0, Total=420 [2024-09-12 16:29:30,605 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) [2024-09-12 16:29:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:30,720 INFO L93 Difference]: Finished difference Result 97 states and 131 transitions. [2024-09-12 16:29:30,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 16:29:30,720 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 [2024-09-12 16:29:30,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:30,722 INFO L225 Difference]: With dead ends: 97 [2024-09-12 16:29:30,722 INFO L226 Difference]: Without dead ends: 93 [2024-09-12 16:29:30,722 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 [2024-09-12 16:29:30,723 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 [2024-09-12 16:29:30,723 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] [2024-09-12 16:29:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-12 16:29:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 90. [2024-09-12 16:29:30,737 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) [2024-09-12 16:29:30,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 122 transitions. [2024-09-12 16:29:30,738 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 122 transitions. Word has length 68 [2024-09-12 16:29:30,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:30,738 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 122 transitions. [2024-09-12 16:29:30,739 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) [2024-09-12 16:29:30,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:30,739 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 122 transitions. [2024-09-12 16:29:30,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-12 16:29:30,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 16:29:30,740 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] [2024-09-12 16:29:30,754 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 16:29:30,944 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 [2024-09-12 16:29:30,945 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 16:29:30,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:30,945 INFO L85 PathProgramCache]: Analyzing trace with hash 2028010288, now seen corresponding path program 1 times [2024-09-12 16:29:30,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 16:29:30,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588153135] [2024-09-12 16:29:30,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:30,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 16:29:30,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 16:29:30,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:30,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-12 16:29:30,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:31,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:31,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:31,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 16:29:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-12 16:29:31,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 3 [2024-09-12 16:29:31,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-12 16:29:31,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,102 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 21 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-12 16:29:31,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 16:29:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588153135] [2024-09-12 16:29:31,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588153135] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 16:29:31,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612229990] [2024-09-12 16:29:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 16:29:31,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 16:29:31,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 16:29:31,105 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) [2024-09-12 16:29:31,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 16:29:31,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 16:29:31,164 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 16:29:31,167 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 16:29:31,247 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 17 proven. 33 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-12 16:29:31,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 16:29:31,754 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 19 proven. 35 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 16:29:31,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612229990] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 16:29:31,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 16:29:31,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 11] total 17 [2024-09-12 16:29:31,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978987653] [2024-09-12 16:29:31,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 16:29:31,755 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 16:29:31,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 16:29:31,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 16:29:31,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-12 16:29:31,756 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) [2024-09-12 16:29:31,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 16:29:31,969 INFO L93 Difference]: Finished difference Result 162 states and 237 transitions. [2024-09-12 16:29:31,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 16:29:31,971 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 [2024-09-12 16:29:31,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 16:29:31,972 INFO L225 Difference]: With dead ends: 162 [2024-09-12 16:29:31,972 INFO L226 Difference]: Without dead ends: 0 [2024-09-12 16:29:31,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 150 SyntacticMatches, 5 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2024-09-12 16:29:31,974 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 [2024-09-12 16:29:31,974 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] [2024-09-12 16:29:31,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-12 16:29:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-12 16:29:31,976 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) [2024-09-12 16:29:31,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-12 16:29:31,976 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 69 [2024-09-12 16:29:31,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 16:29:31,976 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-12 16:29:31,977 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) [2024-09-12 16:29:31,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 16:29:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-12 16:29:31,977 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-12 16:29:31,979 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-12 16:29:31,995 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-12 16:29:32,180 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 [2024-09-12 16:29:32,183 INFO L408 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 16:29:32,185 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-12 16:29:34,314 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-12 16:29:34,335 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 12.09 04:29:34 BoogieIcfgContainer [2024-09-12 16:29:34,335 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-12 16:29:34,335 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-12 16:29:34,336 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-12 16:29:34,336 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-12 16:29:34,336 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 04:29:20" (3/4) ... [2024-09-12 16:29:34,338 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-12 16:29:34,342 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-12 16:29:34,342 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-12 16:29:34,343 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo2 [2024-09-12 16:29:34,343 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure fibo1 [2024-09-12 16:29:34,347 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 11 nodes and edges [2024-09-12 16:29:34,348 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-12 16:29:34,349 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-12 16:29:34,349 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-12 16:29:34,428 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-12 16:29:34,429 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-12 16:29:34,429 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-12 16:29:34,429 INFO L158 Benchmark]: Toolchain (without parser) took 14094.76ms. Allocated memory was 56.6MB in the beginning and 211.8MB in the end (delta: 155.2MB). Free memory was 35.3MB in the beginning and 142.7MB in the end (delta: -107.4MB). Peak memory consumption was 46.9MB. Max. memory is 16.1GB. [2024-09-12 16:29:34,430 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 41.9MB. Free memory was 16.7MB in the beginning and 16.7MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 16:29:34,430 INFO L158 Benchmark]: CACSL2BoogieTranslator took 232.78ms. Allocated memory is still 56.6MB. Free memory was 35.1MB in the beginning and 23.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-12 16:29:34,430 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.19ms. Allocated memory is still 56.6MB. Free memory was 23.8MB in the beginning and 22.9MB in the end (delta: 901.6kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 16:29:34,430 INFO L158 Benchmark]: Boogie Preprocessor took 46.96ms. Allocated memory is still 69.2MB. Free memory was 49.4MB in the beginning and 48.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-12 16:29:34,430 INFO L158 Benchmark]: RCFGBuilder took 348.68ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 35.9MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-12 16:29:34,431 INFO L158 Benchmark]: TraceAbstraction took 13336.43ms. Allocated memory was 69.2MB in the beginning and 211.8MB in the end (delta: 142.6MB). Free memory was 35.2MB in the beginning and 146.9MB in the end (delta: -111.7MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. [2024-09-12 16:29:34,431 INFO L158 Benchmark]: Witness Printer took 93.19ms. Allocated memory is still 211.8MB. Free memory was 146.9MB in the beginning and 142.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-12 16:29:34,432 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 41.9MB. Free memory was 16.7MB in the beginning and 16.7MB in the end (delta: 52.5kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 232.78ms. Allocated memory is still 56.6MB. Free memory was 35.1MB in the beginning and 23.8MB in the end (delta: 11.4MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.19ms. Allocated memory is still 56.6MB. Free memory was 23.8MB in the beginning and 22.9MB in the end (delta: 901.6kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 46.96ms. Allocated memory is still 69.2MB. Free memory was 49.4MB in the beginning and 48.0MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 348.68ms. Allocated memory is still 69.2MB. Free memory was 47.8MB in the beginning and 35.9MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 13336.43ms. Allocated memory was 69.2MB in the beginning and 211.8MB in the end (delta: 142.6MB). Free memory was 35.2MB in the beginning and 146.9MB in the end (delta: -111.7MB). Peak memory consumption was 96.7MB. Max. memory is 16.1GB. * Witness Printer took 93.19ms. Allocated memory is still 211.8MB. Free memory was 146.9MB in the beginning and 142.7MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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: 11.1s, OverallIterations: 11, TraceHistogramMax: 5, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 2.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 364 SdHoareTripleChecker+Valid, 1.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 295 mSDsluCounter, 2557 SdHoareTripleChecker+Invalid, 1.4s 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, 1.6s 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: 0.1s SsaConstructionTime, 0.3s SatisfiabilityAnalysisTime, 5.6s 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! [2024-09-12 16:29:34,464 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