./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 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/recursive-simple/id_i15_o15-1.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 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --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 19:51:11,800 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 19:51:11,870 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 19:51:11,873 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 19:51:11,874 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 19:51:11,909 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 19:51:11,909 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 19:51:11,910 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 19:51:11,910 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 19:51:11,911 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 19:51:11,911 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 19:51:11,912 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 19:51:11,912 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 19:51:11,912 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 19:51:11,913 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 19:51:11,913 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 19:51:11,914 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 19:51:11,914 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 19:51:11,914 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 19:51:11,915 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 19:51:11,915 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 19:51:11,916 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 19:51:11,916 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 19:51:11,916 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 19:51:11,917 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 19:51:11,917 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 19:51:11,917 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 19:51:11,918 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 19:51:11,918 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 19:51:11,918 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 19:51:11,919 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 19:51:11,919 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 19:51:11,919 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:11,920 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 19:51:11,920 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 19:51:11,920 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 19:51:11,920 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 19:51:11,921 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 19:51:11,921 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 19:51:11,921 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 19:51:11,922 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 19:51:11,922 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 19:51:11,922 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 19:51:12,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 19:51:12,181 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 19:51:12,185 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 19:51:12,186 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 19:51:12,187 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 19:51:12,188 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-20 19:51:13,540 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 19:51:13,722 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 19:51:13,723 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-20 19:51:13,729 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/54c94ee1f/404b26527eab42f5ab553ad83f723469/FLAG0f7f1c8be [2024-09-20 19:51:13,741 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/54c94ee1f/404b26527eab42f5ab553ad83f723469 [2024-09-20 19:51:13,743 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 19:51:13,745 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 19:51:13,746 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:13,746 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 19:51:13,750 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 19:51:13,750 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,751 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@87fcc6b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13, skipping insertion in model container [2024-09-20 19:51:13,751 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,764 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 19:51:13,903 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-20 19:51:13,906 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:13,914 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 19:51:13,929 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-20 19:51:13,930 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 19:51:13,948 INFO L204 MainTranslator]: Completed translation [2024-09-20 19:51:13,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13 WrapperNode [2024-09-20 19:51:13,949 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 19:51:13,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:13,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 19:51:13,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 19:51:13,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,964 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,971 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 19:51:13,971 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 19:51:13,972 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 19:51:13,972 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 19:51:13,972 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 19:51:13,981 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,981 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,982 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,992 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 19:51:13,993 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:13,993 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,000 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,001 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,002 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,003 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,004 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 19:51:14,005 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 19:51:14,005 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 19:51:14,005 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 19:51:14,006 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (1/1) ... [2024-09-20 19:51:14,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 19:51:14,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:14,045 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 19:51:14,050 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 19:51:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 19:51:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 19:51:14,095 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 19:51:14,095 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 19:51:14,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 19:51:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 19:51:14,096 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 19:51:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 19:51:14,096 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-20 19:51:14,096 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-20 19:51:14,162 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 19:51:14,164 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 19:51:14,268 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 19:51:14,269 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 19:51:14,294 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 19:51:14,295 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-20 19:51:14,295 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:14 BoogieIcfgContainer [2024-09-20 19:51:14,296 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 19:51:14,298 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 19:51:14,298 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 19:51:14,301 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 19:51:14,301 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 07:51:13" (1/3) ... [2024-09-20 19:51:14,302 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4dd881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:14, skipping insertion in model container [2024-09-20 19:51:14,302 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 07:51:13" (2/3) ... [2024-09-20 19:51:14,303 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1d4dd881 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 07:51:14, skipping insertion in model container [2024-09-20 19:51:14,303 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:14" (3/3) ... [2024-09-20 19:51:14,304 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-20 19:51:14,321 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 19:51:14,322 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 19:51:14,388 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 19:51:14,395 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;@653051be, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 19:51:14,395 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 19:51:14,399 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-20 19:51:14,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 19:51:14,404 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:14,405 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:14,405 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:14,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:14,411 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-20 19:51:14,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:14,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999090113] [2024-09-20 19:51:14,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:14,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:14,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:14,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:14,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:14,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:14,661 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 19:51:14,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:14,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999090113] [2024-09-20 19:51:14,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1999090113] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:51:14,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 19:51:14,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 19:51:14,669 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698970114] [2024-09-20 19:51:14,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:51:14,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 19:51:14,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:14,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 19:51:14,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:51:14,715 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:51:14,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:14,776 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-20 19:51:14,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 19:51:14,778 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-20 19:51:14,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:14,785 INFO L225 Difference]: With dead ends: 30 [2024-09-20 19:51:14,786 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 19:51:14,788 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 19:51:14,791 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:14,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:14,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 19:51:14,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 19:51:14,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-20 19:51:14,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-20 19:51:14,835 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-20 19:51:14,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:14,835 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-20 19:51:14,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-20 19:51:14,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:14,836 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-20 19:51:14,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 19:51:14,837 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:14,837 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:14,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 19:51:14,838 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:14,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:14,838 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-20 19:51:14,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:14,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688604813] [2024-09-20 19:51:14,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:14,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:14,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:14,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:14,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:14,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:15,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:51:15,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:15,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688604813] [2024-09-20 19:51:15,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1688604813] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:15,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532932546] [2024-09-20 19:51:15,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:15,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:15,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:15,140 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 19:51:15,142 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 19:51:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,199 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-20 19:51:15,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 19:51:15,283 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:15,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 19:51:15,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532932546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:15,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:15,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-20 19:51:15,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999214643] [2024-09-20 19:51:15,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:15,503 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 19:51:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:15,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 19:51:15,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-20 19:51:15,505 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:51:15,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:15,572 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-20 19:51:15,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 19:51:15,573 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 19 [2024-09-20 19:51:15,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:15,574 INFO L225 Difference]: With dead ends: 25 [2024-09-20 19:51:15,574 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 19:51:15,575 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-20 19:51:15,578 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:15,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:15,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 19:51:15,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 19:51:15,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-20 19:51:15,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-20 19:51:15,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-20 19:51:15,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:15,589 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-20 19:51:15,589 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-20 19:51:15,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-20 19:51:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 19:51:15,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:15,592 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:15,605 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-20 19:51:15,793 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:15,794 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:15,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:15,795 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-20 19:51:15,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:15,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806455508] [2024-09-20 19:51:15,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:15,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:15,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:15,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:15,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:16,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:16,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:16,044 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 19:51:16,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806455508] [2024-09-20 19:51:16,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1806455508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:16,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1971650227] [2024-09-20 19:51:16,046 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:16,046 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:16,046 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:16,049 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 19:51:16,050 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 19:51:16,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:16,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:16,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 19:51:16,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:16,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 19:51:16,171 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 19:51:16,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1971650227] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:16,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:16,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-20 19:51:16,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365418131] [2024-09-20 19:51:16,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:16,535 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 19:51:16,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:16,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 19:51:16,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-20 19:51:16,537 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-20 19:51:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:16,613 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-20 19:51:16,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 19:51:16,614 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) Word has length 25 [2024-09-20 19:51:16,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:16,615 INFO L225 Difference]: With dead ends: 28 [2024-09-20 19:51:16,615 INFO L226 Difference]: Without dead ends: 24 [2024-09-20 19:51:16,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:51:16,617 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:16,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:16,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-20 19:51:16,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-20 19:51:16,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-20 19:51:16,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-20 19:51:16,629 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-20 19:51:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:16,629 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-20 19:51:16,630 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-20 19:51:16,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:16,630 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-20 19:51:16,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 19:51:16,631 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:16,631 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:16,649 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 19:51:16,832 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:16,833 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:16,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:16,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-20 19:51:16,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:16,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865050553] [2024-09-20 19:51:16,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:16,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:16,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:16,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:16,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:16,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:17,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:17,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:17,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:17,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:17,088 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 19:51:17,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865050553] [2024-09-20 19:51:17,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865050553] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:17,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609212267] [2024-09-20 19:51:17,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:17,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:17,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:17,091 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 19:51:17,093 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 19:51:17,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 19:51:17,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:17,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 19:51:17,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:17,203 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:17,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 19:51:17,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609212267] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:17,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:17,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-20 19:51:17,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245949174] [2024-09-20 19:51:17,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:17,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 19:51:17,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:17,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 19:51:17,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-20 19:51:17,768 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 19:51:17,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:17,845 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-20 19:51:17,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 19:51:17,847 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) Word has length 31 [2024-09-20 19:51:17,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:17,848 INFO L225 Difference]: With dead ends: 31 [2024-09-20 19:51:17,848 INFO L226 Difference]: Without dead ends: 27 [2024-09-20 19:51:17,849 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-20 19:51:17,849 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:17,850 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:17,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-20 19:51:17,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-20 19:51:17,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-20 19:51:17,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-20 19:51:17,857 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-20 19:51:17,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:17,857 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-20 19:51:17,857 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-20 19:51:17,858 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:17,858 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-20 19:51:17,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 19:51:17,859 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:17,859 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:17,878 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 19:51:18,066 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:18,067 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:18,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:18,067 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-20 19:51:18,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:18,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216951487] [2024-09-20 19:51:18,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:18,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:18,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:18,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:18,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:18,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:18,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:18,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:18,324 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 19:51:18,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216951487] [2024-09-20 19:51:18,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216951487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:18,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1387701094] [2024-09-20 19:51:18,325 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:18,325 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:18,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:18,327 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 19:51:18,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 19:51:18,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:18,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:18,376 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 19:51:18,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:18,438 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 19:51:18,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 19:51:19,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1387701094] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:19,164 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:19,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-20 19:51:19,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724617512] [2024-09-20 19:51:19,164 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:19,164 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 19:51:19,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:19,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 19:51:19,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-20 19:51:19,166 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-20 19:51:19,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:19,245 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-20 19:51:19,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 19:51:19,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) Word has length 37 [2024-09-20 19:51:19,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:19,246 INFO L225 Difference]: With dead ends: 34 [2024-09-20 19:51:19,246 INFO L226 Difference]: Without dead ends: 30 [2024-09-20 19:51:19,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:51:19,248 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:19,249 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:19,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-20 19:51:19,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-20 19:51:19,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-20 19:51:19,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-20 19:51:19,257 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-20 19:51:19,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:19,258 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-20 19:51:19,258 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-20 19:51:19,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:19,258 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-20 19:51:19,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 19:51:19,259 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:19,259 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:19,276 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:19,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:19,464 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:19,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:19,464 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-20 19:51:19,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:19,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665819014] [2024-09-20 19:51:19,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:19,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:19,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:19,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:19,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:19,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:19,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:19,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:19,753 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 19:51:19,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:19,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665819014] [2024-09-20 19:51:19,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665819014] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:19,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701101664] [2024-09-20 19:51:19,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:51:19,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:19,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:19,756 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:19,757 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 19:51:19,814 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 19:51:19,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:19,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 19:51:19,817 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:19,891 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-20 19:51:19,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:20,995 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 19:51:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701101664] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:20,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:20,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-20 19:51:20,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657277344] [2024-09-20 19:51:20,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:20,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:51:21,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:21,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:51:21,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-20 19:51:21,002 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 19:51:21,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:21,095 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-20 19:51:21,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 19:51:21,096 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) Word has length 43 [2024-09-20 19:51:21,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:21,101 INFO L225 Difference]: With dead ends: 37 [2024-09-20 19:51:21,101 INFO L226 Difference]: Without dead ends: 33 [2024-09-20 19:51:21,102 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2024-09-20 19:51:21,102 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:21,103 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:21,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-20 19:51:21,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-20 19:51:21,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-20 19:51:21,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-20 19:51:21,113 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-20 19:51:21,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:21,113 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-20 19:51:21,114 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-20 19:51:21,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:21,115 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-20 19:51:21,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 19:51:21,118 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:21,119 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:21,136 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 19:51:21,319 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 19:51:21,320 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:21,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:21,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-20 19:51:21,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:21,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270776231] [2024-09-20 19:51:21,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:21,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:21,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:21,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:21,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:21,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 19:51:21,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:21,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270776231] [2024-09-20 19:51:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270776231] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056414672] [2024-09-20 19:51:21,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:51:21,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:21,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:21,705 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:21,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 19:51:21,777 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 19:51:21,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:21,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 19:51:21,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:21,861 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 19:51:21,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:23,272 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 19:51:23,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056414672] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:23,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:23,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-20 19:51:23,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352854814] [2024-09-20 19:51:23,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:23,273 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 19:51:23,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:23,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 19:51:23,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-20 19:51:23,274 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-20 19:51:23,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:23,354 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-20 19:51:23,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 19:51:23,354 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) Word has length 49 [2024-09-20 19:51:23,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:23,355 INFO L225 Difference]: With dead ends: 40 [2024-09-20 19:51:23,355 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 19:51:23,356 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2024-09-20 19:51:23,357 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:23,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 93 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:51:23,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 19:51:23,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 19:51:23,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-20 19:51:23,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-20 19:51:23,363 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-20 19:51:23,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:23,364 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-20 19:51:23,364 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-20 19:51:23,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-20 19:51:23,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 19:51:23,367 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:23,367 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:23,379 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 19:51:23,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:23,569 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:23,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:23,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-20 19:51:23,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:23,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635576471] [2024-09-20 19:51:23,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:23,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:23,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:23,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:23,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:23,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:23,934 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-20 19:51:23,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:23,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635576471] [2024-09-20 19:51:23,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635576471] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:23,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908761073] [2024-09-20 19:51:23,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:51:23,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:23,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:23,938 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:23,940 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 19:51:24,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:24,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 19:51:24,028 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:24,101 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-20 19:51:24,102 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 19:51:25,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908761073] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:25,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:25,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-20 19:51:25,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627847151] [2024-09-20 19:51:25,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:25,918 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-20 19:51:25,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:25,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-20 19:51:25,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:51:25,919 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 19:51:26,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:26,041 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-20 19:51:26,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 19:51:26,042 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) Word has length 55 [2024-09-20 19:51:26,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:26,043 INFO L225 Difference]: With dead ends: 43 [2024-09-20 19:51:26,043 INFO L226 Difference]: Without dead ends: 39 [2024-09-20 19:51:26,044 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2024-09-20 19:51:26,044 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:26,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:26,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-20 19:51:26,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-20 19:51:26,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-20 19:51:26,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-20 19:51:26,057 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-20 19:51:26,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:26,058 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-20 19:51:26,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-20 19:51:26,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:26,058 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-20 19:51:26,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-20 19:51:26,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:26,059 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:26,078 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:26,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:26,260 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:26,260 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-20 19:51:26,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061548962] [2024-09-20 19:51:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:26,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:26,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,331 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:26,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-20 19:51:26,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:26,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061548962] [2024-09-20 19:51:26,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061548962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [376293842] [2024-09-20 19:51:26,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:51:26,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:26,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:26,689 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:26,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 19:51:26,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:51:26,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:26,807 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 19:51:26,808 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-20 19:51:26,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:29,341 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 19:51:29,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [376293842] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:29,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:29,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-20 19:51:29,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624552062] [2024-09-20 19:51:29,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:29,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 19:51:29,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:29,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 19:51:29,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-20 19:51:29,343 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 19:51:29,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:29,465 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-20 19:51:29,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 19:51:29,466 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) Word has length 61 [2024-09-20 19:51:29,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:29,467 INFO L225 Difference]: With dead ends: 46 [2024-09-20 19:51:29,467 INFO L226 Difference]: Without dead ends: 42 [2024-09-20 19:51:29,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:51:29,469 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:29,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 121 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:29,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-20 19:51:29,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-20 19:51:29,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-20 19:51:29,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-20 19:51:29,475 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-20 19:51:29,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:29,475 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-20 19:51:29,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-20 19:51:29,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:29,476 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-20 19:51:29,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-20 19:51:29,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:29,477 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:29,490 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:29,677 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:29,678 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:29,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:29,679 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-20 19:51:29,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:29,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142274906] [2024-09-20 19:51:29,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:29,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:29,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:29,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:29,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:29,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:29,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:29,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:29,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:29,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:30,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:30,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:30,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:30,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:30,165 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-20 19:51:30,165 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:30,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142274906] [2024-09-20 19:51:30,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142274906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:30,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636123357] [2024-09-20 19:51:30,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:51:30,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:30,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:30,167 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:30,169 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 19:51:30,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-20 19:51:30,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:30,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 19:51:30,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:30,395 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 19:51:30,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:33,557 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 19:51:33,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636123357] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:33,557 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:33,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-20 19:51:33,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514226556] [2024-09-20 19:51:33,557 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:33,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 19:51:33,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:33,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 19:51:33,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-20 19:51:33,559 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-20 19:51:33,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:33,683 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-20 19:51:33,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 19:51:33,686 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) Word has length 67 [2024-09-20 19:51:33,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:33,686 INFO L225 Difference]: With dead ends: 49 [2024-09-20 19:51:33,686 INFO L226 Difference]: Without dead ends: 45 [2024-09-20 19:51:33,687 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:51:33,688 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:33,688 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:33,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-20 19:51:33,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-20 19:51:33,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-20 19:51:33,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-20 19:51:33,694 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-20 19:51:33,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:33,694 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-20 19:51:33,695 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-20 19:51:33,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:33,695 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-20 19:51:33,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-20 19:51:33,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:33,696 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:33,712 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 19:51:33,900 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 19:51:33,901 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:33,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:33,901 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-20 19:51:33,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:33,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308525737] [2024-09-20 19:51:33,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:33,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:33,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:33,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:34,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:34,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:34,476 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-20 19:51:34,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:34,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308525737] [2024-09-20 19:51:34,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308525737] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:34,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514790526] [2024-09-20 19:51:34,477 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:51:34,477 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:34,477 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:34,479 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:34,480 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 19:51:34,685 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:51:34,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:34,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 19:51:34,688 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:34,787 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-20 19:51:34,788 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:39,024 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 19:51:39,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514790526] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:39,024 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:39,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-20 19:51:39,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222525593] [2024-09-20 19:51:39,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:39,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 19:51:39,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:39,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 19:51:39,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-20 19:51:39,026 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-20 19:51:39,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:39,158 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-20 19:51:39,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 19:51:39,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) Word has length 73 [2024-09-20 19:51:39,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:39,159 INFO L225 Difference]: With dead ends: 52 [2024-09-20 19:51:39,159 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 19:51:39,160 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 19:51:39,161 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:39,161 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 136 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:39,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 19:51:39,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 19:51:39,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-20 19:51:39,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-20 19:51:39,167 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-20 19:51:39,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:39,169 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-20 19:51:39,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-20 19:51:39,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,170 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-20 19:51:39,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-20 19:51:39,170 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:39,170 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:39,185 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 19:51:39,371 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 19:51:39,371 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:39,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:39,371 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-20 19:51:39,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:39,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994396238] [2024-09-20 19:51:39,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:39,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:39,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:39,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:39,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:39,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:40,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:40,126 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-20 19:51:40,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994396238] [2024-09-20 19:51:40,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994396238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:40,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [703840811] [2024-09-20 19:51:40,130 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 19:51:40,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:40,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:40,131 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:40,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 19:51:40,406 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-20 19:51:40,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:40,408 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 19:51:40,410 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-20 19:51:40,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 19:51:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [703840811] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:46,014 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:46,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-20 19:51:46,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829356477] [2024-09-20 19:51:46,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:46,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 19:51:46,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:46,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 19:51:46,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 19:51:46,016 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 19:51:46,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:46,179 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-20 19:51:46,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 19:51:46,180 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) Word has length 79 [2024-09-20 19:51:46,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:46,180 INFO L225 Difference]: With dead ends: 55 [2024-09-20 19:51:46,180 INFO L226 Difference]: Without dead ends: 51 [2024-09-20 19:51:46,181 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1311, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 19:51:46,182 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:46,182 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 146 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:46,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-20 19:51:46,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-20 19:51:46,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-20 19:51:46,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-20 19:51:46,189 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-20 19:51:46,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:46,189 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-20 19:51:46,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-20 19:51:46,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:46,190 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-20 19:51:46,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-20 19:51:46,191 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:46,191 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:46,208 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 19:51:46,395 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:46,396 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:46,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:46,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-20 19:51:46,396 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:46,396 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759467158] [2024-09-20 19:51:46,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:46,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:46,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:46,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:46,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:46,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:47,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-20 19:51:47,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:47,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759467158] [2024-09-20 19:51:47,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759467158] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:47,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789365266] [2024-09-20 19:51:47,121 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 19:51:47,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:47,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:47,123 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:47,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 19:51:47,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-20 19:51:47,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:51:47,485 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 19:51:47,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:47,596 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-20 19:51:47,596 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:51:55,050 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 19:51:55,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789365266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:51:55,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:51:55,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-20 19:51:55,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855146813] [2024-09-20 19:51:55,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:51:55,051 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 19:51:55,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:51:55,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 19:51:55,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 19:51:55,052 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-20 19:51:55,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:51:55,217 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-20 19:51:55,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 19:51:55,218 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) Word has length 85 [2024-09-20 19:51:55,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:51:55,221 INFO L225 Difference]: With dead ends: 58 [2024-09-20 19:51:55,221 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 19:51:55,222 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=1495, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 19:51:55,222 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:51:55,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:51:55,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 19:51:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-20 19:51:55,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-20 19:51:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-20 19:51:55,235 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-20 19:51:55,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:51:55,236 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-20 19:51:55,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-20 19:51:55,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:55,236 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-20 19:51:55,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-20 19:51:55,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:51:55,239 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:51:55,258 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 19:51:55,443 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 19:51:55,444 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:51:55,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:51:55,444 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-20 19:51:55,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:51:55,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195108660] [2024-09-20 19:51:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:51:55,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:51:55,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:51:55,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:51:55,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:55,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,126 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:51:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,266 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-20 19:51:56,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:51:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195108660] [2024-09-20 19:51:56,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195108660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:51:56,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83669138] [2024-09-20 19:51:56,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 19:51:56,267 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:51:56,267 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:51:56,268 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:51:56,271 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 19:51:56,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:51:56,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 19:51:56,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:51:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-20 19:51:56,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:06,021 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 19:52:06,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83669138] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:06,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:06,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-20 19:52:06,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83531124] [2024-09-20 19:52:06,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:06,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 19:52:06,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:06,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 19:52:06,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:52:06,024 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-20 19:52:06,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:06,202 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-20 19:52:06,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 19:52:06,202 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) Word has length 91 [2024-09-20 19:52:06,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:06,203 INFO L225 Difference]: With dead ends: 61 [2024-09-20 19:52:06,204 INFO L226 Difference]: Without dead ends: 57 [2024-09-20 19:52:06,205 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1691, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 19:52:06,205 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:06,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 165 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:06,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-20 19:52:06,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-20 19:52:06,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-20 19:52:06,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-20 19:52:06,211 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-20 19:52:06,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:06,212 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-20 19:52:06,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-20 19:52:06,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:06,213 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-20 19:52:06,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-20 19:52:06,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:06,214 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:06,232 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:06,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 19:52:06,414 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:06,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:06,415 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-20 19:52:06,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:06,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130568781] [2024-09-20 19:52:06,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:06,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:06,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:06,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:06,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:06,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:06,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:07,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-20 19:52:07,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:07,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130568781] [2024-09-20 19:52:07,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130568781] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:07,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520552611] [2024-09-20 19:52:07,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 19:52:07,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:07,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:07,265 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:52:07,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 19:52:07,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 19:52:07,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:07,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-20 19:52:07,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:07,868 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-20 19:52:07,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:18,973 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 19:52:18,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520552611] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:18,973 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:18,973 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-20 19:52:18,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107879286] [2024-09-20 19:52:18,973 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:18,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-20 19:52:18,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:18,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-20 19:52:18,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-20 19:52:18,975 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 19:52:19,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:19,174 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-20 19:52:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 19:52:19,174 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-20 19:52:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:19,175 INFO L225 Difference]: With dead ends: 64 [2024-09-20 19:52:19,175 INFO L226 Difference]: Without dead ends: 60 [2024-09-20 19:52:19,179 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-20 19:52:19,181 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:19,181 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 180 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 19:52:19,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-20 19:52:19,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-20 19:52:19,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-20 19:52:19,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-20 19:52:19,193 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-20 19:52:19,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:19,194 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-20 19:52:19,194 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-20 19:52:19,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,194 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-20 19:52:19,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-20 19:52:19,195 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:19,196 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:19,216 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 19:52:19,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 19:52:19,397 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:19,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:19,398 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-20 19:52:19,398 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:19,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687258157] [2024-09-20 19:52:19,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:19,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:19,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:19,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:19,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:19,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:19,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,319 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:20,815 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-20 19:52:20,815 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687258157] [2024-09-20 19:52:20,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687258157] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:20,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114371220] [2024-09-20 19:52:20,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 19:52:20,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:20,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:20,818 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:52:20,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 19:52:21,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-20 19:52:21,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:21,469 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 19:52:21,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:21,549 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:21,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 19:52:22,396 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-20 19:52:22,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114371220] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 19:52:22,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 19:52:22,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-20 19:52:22,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096934035] [2024-09-20 19:52:22,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 19:52:22,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-20 19:52:22,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:22,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-20 19:52:22,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-20 19:52:22,399 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-20 19:52:23,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:23,280 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-20 19:52:23,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 19:52:23,281 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) Word has length 103 [2024-09-20 19:52:23,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:23,282 INFO L225 Difference]: With dead ends: 67 [2024-09-20 19:52:23,282 INFO L226 Difference]: Without dead ends: 63 [2024-09-20 19:52:23,283 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 19:52:23,283 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:23,284 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 828 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 19:52:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-20 19:52:23,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-20 19:52:23,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-20 19:52:23,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-20 19:52:23,290 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-20 19:52:23,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:23,290 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-20 19:52:23,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-20 19:52:23,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:23,291 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-20 19:52:23,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-20 19:52:23,291 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 19:52:23,292 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 19:52:23,312 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 19:52:23,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 19:52:23,497 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 19:52:23,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:23,497 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-20 19:52:23,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 19:52:23,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825166129] [2024-09-20 19:52:23,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 19:52:23,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 19:52:23,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:23,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 19:52:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:23,640 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-20 19:52:23,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:23,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:23,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:23,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-20 19:52:24,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 19:52:24,781 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-20 19:52:24,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 19:52:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825166129] [2024-09-20 19:52:24,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825166129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 19:52:24,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846592206] [2024-09-20 19:52:24,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 19:52:24,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:24,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 19:52:24,785 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 19:52:24,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 19:52:25,553 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 19:52:25,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 19:52:25,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 19:52:25,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 19:52:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-20 19:52:25,669 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-20 19:52:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846592206] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 19:52:25,669 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-20 19:52:25,669 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-20 19:52:25,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705209730] [2024-09-20 19:52:25,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 19:52:25,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 19:52:25,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 19:52:25,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 19:52:25,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-20 19:52:25,671 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-20 19:52:25,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 19:52:25,870 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-20 19:52:25,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-20 19:52:25,870 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2024-09-20 19:52:25,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 19:52:25,871 INFO L225 Difference]: With dead ends: 63 [2024-09-20 19:52:25,871 INFO L226 Difference]: Without dead ends: 0 [2024-09-20 19:52:25,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 19:52:25,872 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 19:52:25,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 175 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 19:52:25,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-20 19:52:25,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-20 19:52:25,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-20 19:52:25,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-20 19:52:25,873 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-20 19:52:25,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 19:52:25,873 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-20 19:52:25,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-20 19:52:25,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 19:52:25,874 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-20 19:52:25,874 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-20 19:52:25,877 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-20 19:52:25,892 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 19:52:26,081 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 19:52:26,084 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-20 19:52:26,086 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-20 19:52:27,062 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-20 19:52:27,099 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 20.09 07:52:27 BoogieIcfgContainer [2024-09-20 19:52:27,102 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-20 19:52:27,102 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-20 19:52:27,102 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-20 19:52:27,103 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-20 19:52:27,103 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 07:51:14" (3/4) ... [2024-09-20 19:52:27,105 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-20 19:52:27,154 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-20 19:52:27,154 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-20 19:52:27,155 INFO L158 Benchmark]: Toolchain (without parser) took 73409.99ms. Allocated memory was 169.9MB in the beginning and 627.0MB in the end (delta: 457.2MB). Free memory was 101.8MB in the beginning and 472.0MB in the end (delta: -370.1MB). Peak memory consumption was 89.1MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,155 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 104.9MB. Free memory is still 70.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:52:27,156 INFO L158 Benchmark]: CACSL2BoogieTranslator took 203.51ms. Allocated memory is still 169.9MB. Free memory was 101.6MB in the beginning and 90.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,156 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.54ms. Allocated memory is still 169.9MB. Free memory was 90.7MB in the beginning and 89.8MB in the end (delta: 899.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,156 INFO L158 Benchmark]: Boogie Preprocessor took 32.21ms. Allocated memory is still 169.9MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-20 19:52:27,157 INFO L158 Benchmark]: RCFGBuilder took 291.45ms. Allocated memory is still 169.9MB. Free memory was 88.2MB in the beginning and 132.5MB in the end (delta: -44.3MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,157 INFO L158 Benchmark]: TraceAbstraction took 72803.93ms. Allocated memory was 169.9MB in the beginning and 627.0MB in the end (delta: 457.2MB). Free memory was 131.8MB in the beginning and 475.1MB in the end (delta: -343.3MB). Peak memory consumption was 373.8MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,157 INFO L158 Benchmark]: Witness Printer took 51.63ms. Allocated memory is still 627.0MB. Free memory was 474.1MB in the beginning and 472.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-20 19:52:27,159 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 104.9MB. Free memory is still 70.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 203.51ms. Allocated memory is still 169.9MB. Free memory was 101.6MB in the beginning and 90.7MB in the end (delta: 10.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.54ms. Allocated memory is still 169.9MB. Free memory was 90.7MB in the beginning and 89.8MB in the end (delta: 899.2kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 32.21ms. Allocated memory is still 169.9MB. Free memory was 89.8MB in the beginning and 88.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 291.45ms. Allocated memory is still 169.9MB. Free memory was 88.2MB in the beginning and 132.5MB in the end (delta: -44.3MB). Peak memory consumption was 6.8MB. Max. memory is 16.1GB. * TraceAbstraction took 72803.93ms. Allocated memory was 169.9MB in the beginning and 627.0MB in the end (delta: 457.2MB). Free memory was 131.8MB in the beginning and 475.1MB in the end (delta: -343.3MB). Peak memory consumption was 373.8MB. Max. memory is 16.1GB. * Witness Printer took 51.63ms. Allocated memory is still 627.0MB. Free memory was 474.1MB in the beginning and 472.0MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: 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 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 71.7s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 954 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 786 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2429 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2419 IncrementalHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 264 mSDtfsCounter, 2419 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2634 GetRequests, 1967 SyntacticMatches, 120 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 61.0s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2928 ConstructedInterpolants, 0 QuantifiedInterpolants, 8018 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2688 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 6160/13088 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: 6]: Procedure Contract for id Derived contract for procedure id. Ensures: ((((((((((((((((((3 == \result) && (\old(x) == 3)) || (15 < \old(x))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((2 == \result) && (\old(x) == 2))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\result == 0) && (\old(x) == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-20 19:52:27,196 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE