./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/iftelse.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd 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/loops-crafted-1/iftelse.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 a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:50:08,807 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:50:08,873 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:50:08,879 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:50:08,881 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:50:08,911 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:50:08,914 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:50:08,914 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:50:08,915 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:50:08,917 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:50:08,917 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:50:08,918 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:50:08,918 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:50:08,919 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:50:08,921 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:50:08,921 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:50:08,921 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:50:08,922 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:50:08,922 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:50:08,922 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:50:08,922 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:50:08,926 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:50:08,927 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:50:08,927 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:50:08,927 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:50:08,927 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:50:08,928 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:50:08,928 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:50:08,928 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:50:08,929 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:50:08,929 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:50:08,929 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:50:08,929 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:08,929 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:50:08,930 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:50:08,930 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:50:08,930 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:50:08,930 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:50:08,931 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:50:08,931 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:50:08,931 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:50:08,932 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:50:08,933 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a98f1431f10d7e60a67a648eec648b7f5eb5616fa0d511e794bbda916609379b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:50:09,237 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:50:09,259 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:50:09,262 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:50:09,263 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:50:09,264 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:50:09,265 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/iftelse.c [2024-09-20 18:50:10,702 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:50:10,900 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:50:10,900 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/iftelse.c [2024-09-20 18:50:10,908 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/b0af1711e/6f306553c1fe47d2bfb9dd6d2c8214c6/FLAGf30cd637f [2024-09-20 18:50:11,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/b0af1711e/6f306553c1fe47d2bfb9dd6d2c8214c6 [2024-09-20 18:50:11,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:50:11,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:50:11,288 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:11,288 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:50:11,294 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:50:11,295 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,296 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c3b90a2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11, skipping insertion in model container [2024-09-20 18:50:11,296 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,319 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:50:11,472 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2024-09-20 18:50:11,493 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:11,505 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:50:11,515 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/iftelse.c[406,419] [2024-09-20 18:50:11,521 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:11,540 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:50:11,540 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11 WrapperNode [2024-09-20 18:50:11,540 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:11,541 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:11,542 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:50:11,542 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:50:11,549 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,554 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,562 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:50:11,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:11,563 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:50:11,563 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:50:11,563 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:50:11,572 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,572 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,573 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,591 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 18:50:11,592 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,592 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,599 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,602 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,604 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,605 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,606 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:50:11,606 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:50:11,607 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:50:11,607 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:50:11,610 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (1/1) ... [2024-09-20 18:50:11,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:11,626 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:11,645 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:50:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:50:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:50:11,690 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:50:11,691 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:50:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:50:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:50:11,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:50:11,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:50:11,692 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:50:11,692 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:50:11,692 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:50:11,742 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:50:11,744 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:50:11,923 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 18:50:11,923 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:50:11,941 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:50:11,942 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-20 18:50:11,943 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:11 BoogieIcfgContainer [2024-09-20 18:50:11,943 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:50:11,946 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:50:11,946 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:50:11,949 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:50:11,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:50:11" (1/3) ... [2024-09-20 18:50:11,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8822ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:11, skipping insertion in model container [2024-09-20 18:50:11,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:11" (2/3) ... [2024-09-20 18:50:11,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b8822ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:11, skipping insertion in model container [2024-09-20 18:50:11,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:11" (3/3) ... [2024-09-20 18:50:11,954 INFO L112 eAbstractionObserver]: Analyzing ICFG iftelse.c [2024-09-20 18:50:11,970 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:50:11,970 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:50:12,022 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:50:12,027 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;@36453ab2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:50:12,028 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:50:12,032 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:12,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:50:12,043 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:12,044 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:12,044 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:12,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:12,052 INFO L85 PathProgramCache]: Analyzing trace with hash -639529185, now seen corresponding path program 1 times [2024-09-20 18:50:12,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:12,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167589800] [2024-09-20 18:50:12,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:12,061 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:12,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:13,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:13,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:13,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167589800] [2024-09-20 18:50:13,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167589800] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:13,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:13,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 18:50:13,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097236709] [2024-09-20 18:50:13,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:13,066 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:50:13,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:13,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:50:13,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:13,094 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 15 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:13,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:13,398 INFO L93 Difference]: Finished difference Result 45 states and 63 transitions. [2024-09-20 18:50:13,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:50:13,400 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-20 18:50:13,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:13,406 INFO L225 Difference]: With dead ends: 45 [2024-09-20 18:50:13,406 INFO L226 Difference]: Without dead ends: 25 [2024-09-20 18:50:13,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:50:13,415 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 31 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:13,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 27 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:13,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-20 18:50:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2024-09-20 18:50:13,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.25) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:13,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2024-09-20 18:50:13,455 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 13 [2024-09-20 18:50:13,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:13,456 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2024-09-20 18:50:13,456 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 6 states have internal predecessors, (9), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:13,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:13,457 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2024-09-20 18:50:13,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 18:50:13,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:13,457 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:13,458 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:50:13,458 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:13,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:13,459 INFO L85 PathProgramCache]: Analyzing trace with hash 614346908, now seen corresponding path program 1 times [2024-09-20 18:50:13,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:13,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387523429] [2024-09-20 18:50:13,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:13,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:13,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:13,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:13,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387523429] [2024-09-20 18:50:13,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387523429] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:13,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:13,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:50:13,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516742445] [2024-09-20 18:50:13,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:13,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:50:13,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:13,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:50:13,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:50:13,523 INFO L87 Difference]: Start difference. First operand 24 states and 27 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:13,587 INFO L93 Difference]: Finished difference Result 35 states and 40 transitions. [2024-09-20 18:50:13,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:50:13,588 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-20 18:50:13,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:13,591 INFO L225 Difference]: With dead ends: 35 [2024-09-20 18:50:13,592 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 18:50:13,593 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:13,594 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:13,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 7 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:13,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 18:50:13,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 18:50:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.125) internal successors, (18), 17 states have internal predecessors, (18), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 18:50:13,607 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 16 [2024-09-20 18:50:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:13,607 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 18:50:13,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:13,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 18:50:13,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:50:13,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:13,609 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:13,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:50:13,609 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:13,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:13,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1591064491, now seen corresponding path program 1 times [2024-09-20 18:50:13,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:13,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403223251] [2024-09-20 18:50:13,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:13,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:13,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:13,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 18:50:13,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,749 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:13,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403223251] [2024-09-20 18:50:13,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403223251] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:13,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118896629] [2024-09-20 18:50:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:13,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:13,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:13,754 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:13,756 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:50:13,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:13,806 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 18:50:13,811 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:13,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:13,846 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:13,894 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:13,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118896629] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:13,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:13,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 9 [2024-09-20 18:50:13,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999623734] [2024-09-20 18:50:13,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:13,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:50:13,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:13,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:50:13,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:50:13,898 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:14,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:14,029 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2024-09-20 18:50:14,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:50:14,030 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 21 [2024-09-20 18:50:14,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:14,032 INFO L225 Difference]: With dead ends: 43 [2024-09-20 18:50:14,032 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 18:50:14,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:50:14,033 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 26 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:14,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 16 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:14,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 18:50:14,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 28. [2024-09-20 18:50:14,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:50:14,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2024-09-20 18:50:14,046 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 21 [2024-09-20 18:50:14,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:14,046 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2024-09-20 18:50:14,047 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.6666666666666665) internal successors, (24), 8 states have internal predecessors, (24), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:14,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:14,047 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2024-09-20 18:50:14,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:50:14,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:14,048 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:14,067 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:14,248 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:14,249 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:14,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:14,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1533806189, now seen corresponding path program 1 times [2024-09-20 18:50:14,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:14,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405779481] [2024-09-20 18:50:14,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:14,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:14,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:14,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:14,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:14,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 18:50:14,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:14,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:14,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:14,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405779481] [2024-09-20 18:50:14,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405779481] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:14,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680817502] [2024-09-20 18:50:14,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:14,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:14,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:14,565 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:14,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:50:14,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:14,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-20 18:50:14,612 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:14,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:14,701 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:14,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:14,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680817502] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:14,850 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:14,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-09-20 18:50:14,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671135036] [2024-09-20 18:50:14,850 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:14,851 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:50:14,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:14,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:50:14,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:50:14,853 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:50:15,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:15,279 INFO L93 Difference]: Finished difference Result 47 states and 50 transitions. [2024-09-20 18:50:15,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 18:50:15,284 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 21 [2024-09-20 18:50:15,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:15,285 INFO L225 Difference]: With dead ends: 47 [2024-09-20 18:50:15,285 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 18:50:15,286 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=116, Invalid=534, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:50:15,286 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 34 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:15,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 25 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:50:15,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 18:50:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2024-09-20 18:50:15,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 8 states have call successors, (8), 5 states have call predecessors, (8), 4 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 18:50:15,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 47 transitions. [2024-09-20 18:50:15,311 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 47 transitions. Word has length 21 [2024-09-20 18:50:15,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:15,312 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 47 transitions. [2024-09-20 18:50:15,312 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 14 states have internal predecessors, (30), 7 states have call successors, (9), 4 states have call predecessors, (9), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 18:50:15,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:15,313 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 47 transitions. [2024-09-20 18:50:15,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:50:15,314 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:15,314 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:15,332 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:50:15,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:15,515 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:15,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:15,516 INFO L85 PathProgramCache]: Analyzing trace with hash 517275337, now seen corresponding path program 2 times [2024-09-20 18:50:15,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:15,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812661525] [2024-09-20 18:50:15,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:15,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:15,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:15,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 18:50:15,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:50:15,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:15,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:15,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:15,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812661525] [2024-09-20 18:50:15,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812661525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:15,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357657747] [2024-09-20 18:50:15,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:15,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:15,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:15,919 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:15,921 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:50:15,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:15,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:15,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 18:50:15,981 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:16,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:16,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:50:16,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357657747] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:16,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:16,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-09-20 18:50:16,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996542920] [2024-09-20 18:50:16,497 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:16,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:50:16,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:16,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:50:16,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:50:16,500 INFO L87 Difference]: Start difference. First operand 44 states and 47 transitions. Second operand has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:50:21,661 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.81s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:50:22,718 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.06s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:50:22,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:22,799 INFO L93 Difference]: Finished difference Result 63 states and 68 transitions. [2024-09-20 18:50:22,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 18:50:22,800 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 29 [2024-09-20 18:50:22,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:22,801 INFO L225 Difference]: With dead ends: 63 [2024-09-20 18:50:22,801 INFO L226 Difference]: Without dead ends: 61 [2024-09-20 18:50:22,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=231, Invalid=959, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:50:22,803 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 51 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 228 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:22,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 28 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 228 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 18:50:22,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-20 18:50:22,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2024-09-20 18:50:22,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 11 states have call successors, (11), 6 states have call predecessors, (11), 5 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-20 18:50:22,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2024-09-20 18:50:22,830 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 29 [2024-09-20 18:50:22,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:22,830 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2024-09-20 18:50:22,830 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.619047619047619) internal successors, (34), 18 states have internal predecessors, (34), 8 states have call successors, (10), 4 states have call predecessors, (10), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-20 18:50:22,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:22,831 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2024-09-20 18:50:22,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 18:50:22,834 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:22,834 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:22,853 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 18:50:23,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:23,039 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:23,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:23,039 INFO L85 PathProgramCache]: Analyzing trace with hash 2105782503, now seen corresponding path program 3 times [2024-09-20 18:50:23,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:23,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435586777] [2024-09-20 18:50:23,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:23,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:23,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:23,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-20 18:50:23,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-20 18:50:23,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-20 18:50:23,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-20 18:50:23,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-20 18:50:23,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,601 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 10 proven. 60 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 18:50:23,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:23,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435586777] [2024-09-20 18:50:23,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435586777] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:23,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [71254535] [2024-09-20 18:50:23,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:23,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:23,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:23,607 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:23,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process