./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 1d5fa637 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 08:56:16,763 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 08:56:16,819 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 08:56:16,822 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 08:56:16,822 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 08:56:16,842 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 08:56:16,842 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 08:56:16,844 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 08:56:16,845 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 08:56:16,846 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 08:56:16,846 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 08:56:16,847 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 08:56:16,847 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 08:56:16,848 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 08:56:16,849 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 08:56:16,849 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 08:56:16,849 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 08:56:16,849 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 08:56:16,849 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 08:56:16,850 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 08:56:16,850 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 08:56:16,852 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 08:56:16,852 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 08:56:16,852 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 08:56:16,852 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 08:56:16,853 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 08:56:16,853 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 08:56:16,853 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 08:56:16,853 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 08:56:16,853 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 08:56:16,853 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 08:56:16,854 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 08:56:16,854 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:56:16,854 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 08:56:16,854 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 08:56:16,854 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 08:56:16,854 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 08:56:16,855 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 08:56:16,855 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 08:56:16,855 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 08:56:16,855 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 08:56:16,856 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 08:56:16,857 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-13 08:56:17,077 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 08:56:17,102 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 08:56:17,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 08:56:17,106 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 08:56:17,106 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 08:56:17,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-13 08:56:18,354 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 08:56:18,500 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 08:56:18,500 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-13 08:56:18,509 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/1aea5dd41/60a7397749a5441caa69fe85c2034251/FLAG90e623383 [2024-09-13 08:56:18,919 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/1aea5dd41/60a7397749a5441caa69fe85c2034251 [2024-09-13 08:56:18,921 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 08:56:18,922 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-13 08:56:18,923 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 08:56:18,923 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 08:56:18,928 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 08:56:18,928 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:56:18" (1/1) ... [2024-09-13 08:56:18,929 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5a55df51 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:18, skipping insertion in model container [2024-09-13 08:56:18,929 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 08:56:18" (1/1) ... [2024-09-13 08:56:18,946 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 08:56:19,069 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2024-09-13 08:56:19,083 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:56:19,090 INFO L200 MainTranslator]: Completed pre-run [2024-09-13 08:56:19,098 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c[370,383] [2024-09-13 08:56:19,104 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 08:56:19,123 INFO L204 MainTranslator]: Completed translation [2024-09-13 08:56:19,124 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19 WrapperNode [2024-09-13 08:56:19,124 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 08:56:19,125 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 08:56:19,125 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 08:56:19,125 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 08:56:19,130 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,135 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,140 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-13 08:56:19,140 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 08:56:19,141 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 08:56:19,141 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 08:56:19,141 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 08:56:19,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,150 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,164 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]. [2024-09-13 08:56:19,165 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,165 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,169 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,175 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,176 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,176 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,178 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 08:56:19,179 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 08:56:19,180 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 08:56:19,180 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 08:56:19,180 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (1/1) ... [2024-09-13 08:56:19,184 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 08:56:19,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:19,205 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) [2024-09-13 08:56:19,206 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 08:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 08:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-13 08:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-13 08:56:19,241 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-13 08:56:19,241 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-13 08:56:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-13 08:56:19,242 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-13 08:56:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-13 08:56:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-13 08:56:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-13 08:56:19,243 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 08:56:19,243 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 08:56:19,244 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 08:56:19,244 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 08:56:19,302 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 08:56:19,303 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 08:56:19,447 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-09-13 08:56:19,448 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 08:56:19,476 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 08:56:19,476 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-13 08:56:19,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:56:19 BoogieIcfgContainer [2024-09-13 08:56:19,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 08:56:19,482 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 08:56:19,482 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 08:56:19,501 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 08:56:19,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 08:56:18" (1/3) ... [2024-09-13 08:56:19,501 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a24d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:56:19, skipping insertion in model container [2024-09-13 08:56:19,501 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 08:56:19" (2/3) ... [2024-09-13 08:56:19,502 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20a24d77 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 08:56:19, skipping insertion in model container [2024-09-13 08:56:19,502 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 08:56:19" (3/3) ... [2024-09-13 08:56:19,503 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2024-09-13 08:56:19,519 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 08:56:19,520 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-13 08:56:19,561 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 08:56:19,566 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;@64ac7e8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 08:56:19,566 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-13 08:56:19,569 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-13 08:56:19,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-13 08:56:19,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:19,574 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:19,575 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:19,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:19,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1398085946, now seen corresponding path program 1 times [2024-09-13 08:56:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:19,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870307155] [2024-09-13 08:56:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:19,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:19,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:19,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:56:19,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:19,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870307155] [2024-09-13 08:56:19,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870307155] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:19,803 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:19,803 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:19,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481537670] [2024-09-13 08:56:19,804 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:19,811 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:19,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:19,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:19,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:19,829 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:56:19,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:19,903 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2024-09-13 08:56:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:19,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-13 08:56:19,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:19,911 INFO L225 Difference]: With dead ends: 68 [2024-09-13 08:56:19,911 INFO L226 Difference]: Without dead ends: 29 [2024-09-13 08:56:19,913 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:56:19,915 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:19,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-13 08:56:19,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-13 08:56:19,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:19,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-09-13 08:56:19,941 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2024-09-13 08:56:19,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:19,941 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-09-13 08:56:19,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-13 08:56:19,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:19,942 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-09-13 08:56:19,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-13 08:56:19,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:19,943 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:19,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 08:56:19,943 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:19,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:19,944 INFO L85 PathProgramCache]: Analyzing trace with hash -1021222372, now seen corresponding path program 1 times [2024-09-13 08:56:19,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:19,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242595598] [2024-09-13 08:56:19,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:19,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:19,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 08:56:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:56:20,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242595598] [2024-09-13 08:56:20,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242595598] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-13 08:56:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416195710] [2024-09-13 08:56:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:56:20,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:56:20,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:56:20,254 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:20,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:20,377 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-09-13 08:56:20,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-13 08:56:20,378 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-13 08:56:20,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:20,380 INFO L225 Difference]: With dead ends: 45 [2024-09-13 08:56:20,380 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 08:56:20,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-09-13 08:56:20,382 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:20,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:20,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 08:56:20,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-13 08:56:20,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:20,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-09-13 08:56:20,391 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 28 [2024-09-13 08:56:20,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:20,391 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-09-13 08:56:20,391 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:20,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,392 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-09-13 08:56:20,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:56:20,393 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:20,393 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:20,393 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 08:56:20,393 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:20,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,394 INFO L85 PathProgramCache]: Analyzing trace with hash -1777130061, now seen corresponding path program 1 times [2024-09-13 08:56:20,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:20,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782798288] [2024-09-13 08:56:20,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:20,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:20,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-13 08:56:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,461 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:56:20,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782798288] [2024-09-13 08:56:20,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782798288] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 08:56:20,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951608935] [2024-09-13 08:56:20,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,464 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:56:20,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:56:20,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:56:20,466 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:20,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:20,504 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-09-13 08:56:20,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:56:20,505 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-09-13 08:56:20,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:20,506 INFO L225 Difference]: With dead ends: 62 [2024-09-13 08:56:20,506 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 08:56:20,514 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,515 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:20,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:20,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 08:56:20,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-13 08:56:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-13 08:56:20,522 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 29 [2024-09-13 08:56:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:20,523 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-13 08:56:20,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:20,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-13 08:56:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-13 08:56:20,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:20,524 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:20,524 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-13 08:56:20,525 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:20,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,525 INFO L85 PathProgramCache]: Analyzing trace with hash -464096742, now seen corresponding path program 1 times [2024-09-13 08:56:20,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:20,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088807370] [2024-09-13 08:56:20,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:20,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:20,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 08:56:20,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,591 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 08:56:20,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088807370] [2024-09-13 08:56:20,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088807370] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 08:56:20,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38456947] [2024-09-13 08:56:20,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,593 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 08:56:20,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 08:56:20,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 08:56:20,595 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:20,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:20,619 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-09-13 08:56:20,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 08:56:20,620 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-09-13 08:56:20,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:20,621 INFO L225 Difference]: With dead ends: 54 [2024-09-13 08:56:20,621 INFO L226 Difference]: Without dead ends: 45 [2024-09-13 08:56:20,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,625 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:20,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:20,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-13 08:56:20,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-13 08:56:20,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:20,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2024-09-13 08:56:20,636 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2024-09-13 08:56:20,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:20,637 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2024-09-13 08:56:20,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:20,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,637 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2024-09-13 08:56:20,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 08:56:20,638 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:20,639 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:20,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 08:56:20,639 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:20,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1580607788, now seen corresponding path program 1 times [2024-09-13 08:56:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:20,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189723858] [2024-09-13 08:56:20,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:20,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-13 08:56:20,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:20,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189723858] [2024-09-13 08:56:20,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189723858] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,752 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:20,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872455309] [2024-09-13 08:56:20,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:20,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:20,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,754 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:20,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:20,776 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-13 08:56:20,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:20,776 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-13 08:56:20,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:20,778 INFO L225 Difference]: With dead ends: 69 [2024-09-13 08:56:20,779 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 08:56:20,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,780 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:20,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:20,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 08:56:20,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-13 08:56:20,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-09-13 08:56:20,791 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2024-09-13 08:56:20,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:20,791 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-09-13 08:56:20,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:20,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,791 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-09-13 08:56:20,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-13 08:56:20,792 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:20,792 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:20,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 08:56:20,792 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:20,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,792 INFO L85 PathProgramCache]: Analyzing trace with hash -83212372, now seen corresponding path program 1 times [2024-09-13 08:56:20,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:20,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005203699] [2024-09-13 08:56:20,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:20,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:20,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 08:56:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,871 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:20,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005203699] [2024-09-13 08:56:20,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005203699] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:20,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023520104] [2024-09-13 08:56:20,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:20,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:20,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,874 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:20,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:20,898 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-09-13 08:56:20,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:20,899 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-13 08:56:20,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:20,900 INFO L225 Difference]: With dead ends: 74 [2024-09-13 08:56:20,900 INFO L226 Difference]: Without dead ends: 43 [2024-09-13 08:56:20,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,901 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:20,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:20,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-13 08:56:20,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-13 08:56:20,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:20,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-09-13 08:56:20,914 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2024-09-13 08:56:20,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:20,914 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-09-13 08:56:20,914 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:20,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,914 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-09-13 08:56:20,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-13 08:56:20,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:20,915 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:20,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 08:56:20,915 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:20,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:20,915 INFO L85 PathProgramCache]: Analyzing trace with hash -877631710, now seen corresponding path program 1 times [2024-09-13 08:56:20,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:20,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49833036] [2024-09-13 08:56:20,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:20,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:20,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:20,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:20,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:20,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:20,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-13 08:56:20,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:20,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49833036] [2024-09-13 08:56:20,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49833036] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:20,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:20,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:20,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881809064] [2024-09-13 08:56:20,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:20,997 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:20,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:20,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:20,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:20,997 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:21,020 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-09-13 08:56:21,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:21,021 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-09-13 08:56:21,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:21,021 INFO L225 Difference]: With dead ends: 60 [2024-09-13 08:56:21,021 INFO L226 Difference]: Without dead ends: 45 [2024-09-13 08:56:21,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:21,022 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:21,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:21,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-13 08:56:21,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-13 08:56:21,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:21,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-09-13 08:56:21,033 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 31 [2024-09-13 08:56:21,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:21,034 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-09-13 08:56:21,034 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,035 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-09-13 08:56:21,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-13 08:56:21,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:21,036 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:21,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-13 08:56:21,036 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:21,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,036 INFO L85 PathProgramCache]: Analyzing trace with hash 659613075, now seen corresponding path program 1 times [2024-09-13 08:56:21,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:21,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277800791] [2024-09-13 08:56:21,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:21,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:21,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:21,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:21,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:21,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:21,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:21,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277800791] [2024-09-13 08:56:21,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277800791] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:21,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:21,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:21,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385897098] [2024-09-13 08:56:21,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:21,136 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:21,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:21,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:21,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:21,139 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:21,162 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-13 08:56:21,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:21,162 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-13 08:56:21,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:21,163 INFO L225 Difference]: With dead ends: 53 [2024-09-13 08:56:21,163 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 08:56:21,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:21,164 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:21,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:21,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 08:56:21,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-13 08:56:21,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:21,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-09-13 08:56:21,173 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2024-09-13 08:56:21,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:21,173 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-09-13 08:56:21,173 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,173 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-09-13 08:56:21,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:56:21,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:21,174 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:21,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-13 08:56:21,174 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:21,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1195320207, now seen corresponding path program 1 times [2024-09-13 08:56:21,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:21,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [694778186] [2024-09-13 08:56:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:21,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:21,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:21,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:21,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,238 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:21,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:21,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [694778186] [2024-09-13 08:56:21,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [694778186] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:21,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:21,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:21,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95616811] [2024-09-13 08:56:21,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:21,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:21,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:21,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:21,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:21,240 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:21,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:21,269 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-09-13 08:56:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-09-13 08:56:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:21,271 INFO L225 Difference]: With dead ends: 47 [2024-09-13 08:56:21,272 INFO L226 Difference]: Without dead ends: 39 [2024-09-13 08:56:21,272 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:56:21,273 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:21,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:21,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-13 08:56:21,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-09-13 08:56:21,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:21,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-09-13 08:56:21,279 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2024-09-13 08:56:21,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:21,279 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-09-13 08:56:21,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:21,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-09-13 08:56:21,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-13 08:56:21,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:21,281 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:21,281 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-13 08:56:21,283 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:21,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,283 INFO L85 PathProgramCache]: Analyzing trace with hash -358658342, now seen corresponding path program 1 times [2024-09-13 08:56:21,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:21,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99269527] [2024-09-13 08:56:21,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:21,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:21,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:21,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 08:56:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:21,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:21,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99269527] [2024-09-13 08:56:21,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99269527] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 08:56:21,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 08:56:21,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-13 08:56:21,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764711635] [2024-09-13 08:56:21,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 08:56:21,344 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 08:56:21,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:21,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 08:56:21,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 08:56:21,345 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:21,369 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-09-13 08:56:21,369 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 08:56:21,369 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-13 08:56:21,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:21,370 INFO L225 Difference]: With dead ends: 55 [2024-09-13 08:56:21,371 INFO L226 Difference]: Without dead ends: 35 [2024-09-13 08:56:21,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-13 08:56:21,372 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:21,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-13 08:56:21,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-13 08:56:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-13 08:56:21,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-09-13 08:56:21,378 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2024-09-13 08:56:21,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:21,378 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-09-13 08:56:21,378 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:21,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,381 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-09-13 08:56:21,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 08:56:21,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:21,381 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:21,381 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-13 08:56:21,381 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:21,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1566162331, now seen corresponding path program 1 times [2024-09-13 08:56:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85783611] [2024-09-13 08:56:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:21,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:21,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:21,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:21,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,669 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:21,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:21,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85783611] [2024-09-13 08:56:21,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85783611] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:21,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302066521] [2024-09-13 08:56:21,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:21,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:21,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:21,671 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) [2024-09-13 08:56:21,673 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 08:56:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:21,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-13 08:56:21,736 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:21,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:22,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:22,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302066521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:22,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:22,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 24 [2024-09-13 08:56:22,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365859144] [2024-09-13 08:56:22,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:22,037 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:56:22,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:22,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:56:22,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:56:22,037 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:22,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:22,212 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-13 08:56:22,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-13 08:56:22,212 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-13 08:56:22,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:22,213 INFO L225 Difference]: With dead ends: 63 [2024-09-13 08:56:22,213 INFO L226 Difference]: Without dead ends: 57 [2024-09-13 08:56:22,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:56:22,213 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:22,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 496 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:22,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-13 08:56:22,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-09-13 08:56:22,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:22,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-09-13 08:56:22,219 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2024-09-13 08:56:22,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:22,219 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-09-13 08:56:22,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:22,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:22,219 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-09-13 08:56:22,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:56:22,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:22,220 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:22,232 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 08:56:22,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 08:56:22,421 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:22,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:22,421 INFO L85 PathProgramCache]: Analyzing trace with hash -344080326, now seen corresponding path program 2 times [2024-09-13 08:56:22,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:22,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282081550] [2024-09-13 08:56:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:22,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:22,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:56:22,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:22,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282081550] [2024-09-13 08:56:22,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282081550] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:22,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574679182] [2024-09-13 08:56:22,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:22,488 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:22,488 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:22,489 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) [2024-09-13 08:56:22,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 08:56:22,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:22,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:22,535 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 08:56:22,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:22,561 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:22,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574679182] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:22,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:22,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-13 08:56:22,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127300238] [2024-09-13 08:56:22,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:22,585 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:56:22,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:22,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:56:22,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:56:22,586 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:22,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:22,607 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-09-13 08:56:22,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:56:22,608 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-13 08:56:22,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:22,609 INFO L225 Difference]: With dead ends: 86 [2024-09-13 08:56:22,609 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 08:56:22,609 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:56:22,609 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:22,610 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:22,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 08:56:22,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-13 08:56:22,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:22,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-09-13 08:56:22,616 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 35 [2024-09-13 08:56:22,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:22,616 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-09-13 08:56:22,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:22,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:22,616 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-09-13 08:56:22,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:56:22,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:22,617 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:22,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 08:56:22,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-13 08:56:22,818 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:22,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:22,821 INFO L85 PathProgramCache]: Analyzing trace with hash -177366287, now seen corresponding path program 3 times [2024-09-13 08:56:22,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:22,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983664802] [2024-09-13 08:56:22,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:22,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:22,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:22,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:22,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:22,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:22,886 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983664802] [2024-09-13 08:56:22,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983664802] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:22,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549959283] [2024-09-13 08:56:22,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:22,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:22,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:22,888 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) [2024-09-13 08:56:22,889 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 08:56:22,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:56:22,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:22,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-13 08:56:22,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:22,989 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:22,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549959283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:22,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:22,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-13 08:56:22,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51561047] [2024-09-13 08:56:22,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:22,991 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 08:56:22,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:22,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 08:56:22,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:56:22,992 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:23,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:23,019 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-09-13 08:56:23,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-13 08:56:23,020 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-13 08:56:23,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:23,021 INFO L225 Difference]: With dead ends: 78 [2024-09-13 08:56:23,022 INFO L226 Difference]: Without dead ends: 69 [2024-09-13 08:56:23,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-13 08:56:23,022 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:23,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:23,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-13 08:56:23,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-13 08:56:23,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.280701754385965) internal successors, (73), 59 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-13 08:56:23,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-09-13 08:56:23,032 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 35 [2024-09-13 08:56:23,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:23,032 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-09-13 08:56:23,033 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:23,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:23,033 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-09-13 08:56:23,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:56:23,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:23,035 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:23,048 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-13 08:56:23,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-13 08:56:23,236 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:23,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:23,237 INFO L85 PathProgramCache]: Analyzing trace with hash -253773038, now seen corresponding path program 4 times [2024-09-13 08:56:23,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:23,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118865451] [2024-09-13 08:56:23,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:23,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:23,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:23,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:23,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:23,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:23,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:23,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:23,398 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:23,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118865451] [2024-09-13 08:56:23,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118865451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:23,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322860496] [2024-09-13 08:56:23,398 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:23,399 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:23,399 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:23,400 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) [2024-09-13 08:56:23,401 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 08:56:23,434 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:23,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:23,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:56:23,437 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:23,532 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:23,532 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:23,727 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:23,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322860496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:23,727 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:23,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-13 08:56:23,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526650378] [2024-09-13 08:56:23,728 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:23,728 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:56:23,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:23,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:56:23,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:56:23,729 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:23,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:23,833 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-09-13 08:56:23,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:23,833 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-13 08:56:23,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:23,834 INFO L225 Difference]: With dead ends: 85 [2024-09-13 08:56:23,834 INFO L226 Difference]: Without dead ends: 79 [2024-09-13 08:56:23,835 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:56:23,835 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:23,835 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:23,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-13 08:56:23,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-13 08:56:23,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-13 08:56:23,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-09-13 08:56:23,845 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 35 [2024-09-13 08:56:23,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:23,845 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-09-13 08:56:23,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:23,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:23,845 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-09-13 08:56:23,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-13 08:56:23,846 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:23,846 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:23,859 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-13 08:56:24,047 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:24,047 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:24,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:24,048 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891291, now seen corresponding path program 5 times [2024-09-13 08:56:24,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:24,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282714136] [2024-09-13 08:56:24,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:24,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:24,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:24,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:24,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:56:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,205 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:24,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282714136] [2024-09-13 08:56:24,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282714136] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:24,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146054183] [2024-09-13 08:56:24,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:24,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:24,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:24,207 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) [2024-09-13 08:56:24,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 08:56:24,252 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:24,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:24,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:56:24,255 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:24,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:24,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:24,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:24,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146054183] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:24,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:24,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-13 08:56:24,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872288908] [2024-09-13 08:56:24,518 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:24,518 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:56:24,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:24,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:56:24,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:56:24,519 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:24,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:24,614 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-09-13 08:56:24,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:24,614 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-13 08:56:24,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:24,615 INFO L225 Difference]: With dead ends: 85 [2024-09-13 08:56:24,615 INFO L226 Difference]: Without dead ends: 79 [2024-09-13 08:56:24,615 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:56:24,616 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:24,616 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 273 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:24,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-13 08:56:24,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-13 08:56:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-13 08:56:24,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-09-13 08:56:24,623 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 35 [2024-09-13 08:56:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:24,623 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-09-13 08:56:24,623 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:24,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:24,624 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-09-13 08:56:24,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:56:24,624 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:24,624 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:24,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-13 08:56:24,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 08:56:24,830 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:24,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:24,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1445540013, now seen corresponding path program 6 times [2024-09-13 08:56:24,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:24,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459764456] [2024-09-13 08:56:24,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:24,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:24,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:24,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:24,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:24,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-13 08:56:24,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,010 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:25,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459764456] [2024-09-13 08:56:25,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459764456] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:25,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457162760] [2024-09-13 08:56:25,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:25,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:25,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:25,012 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) [2024-09-13 08:56:25,014 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 08:56:25,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-13 08:56:25,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:25,056 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:56:25,057 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:25,134 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:25,135 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:25,306 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:25,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457162760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:25,306 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:25,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-13 08:56:25,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1516327976] [2024-09-13 08:56:25,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:25,307 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:56:25,307 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:25,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:56:25,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:56:25,308 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:25,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:25,431 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-09-13 08:56:25,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:25,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-13 08:56:25,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:25,432 INFO L225 Difference]: With dead ends: 97 [2024-09-13 08:56:25,432 INFO L226 Difference]: Without dead ends: 84 [2024-09-13 08:56:25,433 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:56:25,433 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:25,434 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 413 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:25,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-13 08:56:25,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-09-13 08:56:25,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 68 states have internal predecessors, (79), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-13 08:56:25,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-09-13 08:56:25,441 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 36 [2024-09-13 08:56:25,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:25,441 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-09-13 08:56:25,441 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:25,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:25,442 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-09-13 08:56:25,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:56:25,442 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:25,442 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:25,454 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 08:56:25,646 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 08:56:25,647 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:25,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:25,647 INFO L85 PathProgramCache]: Analyzing trace with hash 1200674140, now seen corresponding path program 7 times [2024-09-13 08:56:25,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:25,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666113562] [2024-09-13 08:56:25,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:25,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:25,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:25,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:25,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:56:25,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:25,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:25,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666113562] [2024-09-13 08:56:25,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666113562] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:25,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54505941] [2024-09-13 08:56:25,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:25,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:25,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:25,884 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) [2024-09-13 08:56:25,885 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 08:56:25,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:25,928 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 08:56:25,929 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:26,047 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:26,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:26,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54505941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:26,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:26,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2024-09-13 08:56:26,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121580252] [2024-09-13 08:56:26,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:26,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 08:56:26,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:26,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 08:56:26,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:56:26,130 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:26,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:26,370 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2024-09-13 08:56:26,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 08:56:26,370 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-09-13 08:56:26,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:26,371 INFO L225 Difference]: With dead ends: 122 [2024-09-13 08:56:26,371 INFO L226 Difference]: Without dead ends: 116 [2024-09-13 08:56:26,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:26,372 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:26,372 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 623 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:26,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-13 08:56:26,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2024-09-13 08:56:26,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 94 states have internal predecessors, (107), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-13 08:56:26,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2024-09-13 08:56:26,388 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 36 [2024-09-13 08:56:26,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:26,389 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2024-09-13 08:56:26,389 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:26,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:26,389 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2024-09-13 08:56:26,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-13 08:56:26,390 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:26,390 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:26,405 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-13 08:56:26,594 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 08:56:26,595 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:26,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:26,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1664629901, now seen corresponding path program 8 times [2024-09-13 08:56:26,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:26,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475503155] [2024-09-13 08:56:26,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:26,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:26,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:26,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:26,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:26,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:26,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:26,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:26,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:26,748 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:26,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475503155] [2024-09-13 08:56:26,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475503155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:26,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306512067] [2024-09-13 08:56:26,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:26,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:26,749 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:26,751 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) [2024-09-13 08:56:26,752 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 08:56:26,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:26,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:26,793 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:56:26,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:26,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:27,051 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:27,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306512067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:27,051 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:27,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-13 08:56:27,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259476424] [2024-09-13 08:56:27,052 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:27,052 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:56:27,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:27,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:56:27,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:56:27,053 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:27,168 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2024-09-13 08:56:27,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:27,170 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-13 08:56:27,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:27,171 INFO L225 Difference]: With dead ends: 118 [2024-09-13 08:56:27,171 INFO L226 Difference]: Without dead ends: 107 [2024-09-13 08:56:27,172 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:56:27,172 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:27,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 371 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:27,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-13 08:56:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-13 08:56:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.271604938271605) internal successors, (103), 91 states have internal predecessors, (103), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-13 08:56:27,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2024-09-13 08:56:27,184 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 36 [2024-09-13 08:56:27,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:27,184 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2024-09-13 08:56:27,185 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:27,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:27,185 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2024-09-13 08:56:27,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:56:27,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:27,186 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:27,197 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:27,389 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:27,390 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:27,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:27,390 INFO L85 PathProgramCache]: Analyzing trace with hash -381188357, now seen corresponding path program 9 times [2024-09-13 08:56:27,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:27,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111411233] [2024-09-13 08:56:27,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:27,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:27,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:27,433 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:27,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:27,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:56:27,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:27,553 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:27,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111411233] [2024-09-13 08:56:27,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111411233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:27,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396468593] [2024-09-13 08:56:27,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:27,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:27,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:27,555 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) [2024-09-13 08:56:27,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 08:56:27,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:56:27,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:27,596 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:56:27,597 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:27,752 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:27,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:27,987 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:27,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396468593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:27,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:27,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-13 08:56:27,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877396321] [2024-09-13 08:56:27,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:27,988 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:56:27,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:27,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:56:27,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:56:27,989 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:28,199 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-13 08:56:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-13 08:56:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:28,200 INFO L225 Difference]: With dead ends: 121 [2024-09-13 08:56:28,200 INFO L226 Difference]: Without dead ends: 108 [2024-09-13 08:56:28,201 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:56:28,201 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:28,201 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 376 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:28,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-13 08:56:28,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-09-13 08:56:28,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-13 08:56:28,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2024-09-13 08:56:28,214 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 37 [2024-09-13 08:56:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:28,215 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2024-09-13 08:56:28,215 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:28,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:28,215 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2024-09-13 08:56:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:56:28,216 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:28,216 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:28,228 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 08:56:28,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:28,417 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:28,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:28,418 INFO L85 PathProgramCache]: Analyzing trace with hash -956103598, now seen corresponding path program 10 times [2024-09-13 08:56:28,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:28,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758958877] [2024-09-13 08:56:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:28,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:28,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:28,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:28,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:28,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:28,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:28,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:28,600 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:28,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:28,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758958877] [2024-09-13 08:56:28,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758958877] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:28,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109420881] [2024-09-13 08:56:28,601 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:28,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:28,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:28,602 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) [2024-09-13 08:56:28,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 08:56:28,644 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:28,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:28,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:56:28,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:28,774 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:28,774 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:29,017 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:29,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109420881] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:29,018 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:29,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-13 08:56:29,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147923446] [2024-09-13 08:56:29,018 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:29,018 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:56:29,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:29,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:56:29,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:56:29,019 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:29,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:29,196 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-13 08:56:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:29,197 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-13 08:56:29,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:29,198 INFO L225 Difference]: With dead ends: 114 [2024-09-13 08:56:29,198 INFO L226 Difference]: Without dead ends: 103 [2024-09-13 08:56:29,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-13 08:56:29,199 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:29,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 412 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:29,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-13 08:56:29,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-09-13 08:56:29,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 87 states have internal predecessors, (99), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 08:56:29,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2024-09-13 08:56:29,216 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 37 [2024-09-13 08:56:29,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:29,216 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2024-09-13 08:56:29,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:29,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:29,216 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2024-09-13 08:56:29,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:56:29,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:29,217 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:29,230 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:29,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:29,418 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:29,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:29,418 INFO L85 PathProgramCache]: Analyzing trace with hash -503145867, now seen corresponding path program 11 times [2024-09-13 08:56:29,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:29,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156017250] [2024-09-13 08:56:29,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:29,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:29,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:29,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:29,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:29,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156017250] [2024-09-13 08:56:29,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156017250] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:29,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685206451] [2024-09-13 08:56:29,467 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:29,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:29,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:29,469 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) [2024-09-13 08:56:29,470 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 08:56:29,515 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:29,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:29,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 08:56:29,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:29,540 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685206451] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:29,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:29,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-13 08:56:29,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092761097] [2024-09-13 08:56:29,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:29,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:56:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:29,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:56:29,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:56:29,570 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:29,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:29,606 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-09-13 08:56:29,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:56:29,607 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-09-13 08:56:29,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:29,608 INFO L225 Difference]: With dead ends: 110 [2024-09-13 08:56:29,608 INFO L226 Difference]: Without dead ends: 98 [2024-09-13 08:56:29,608 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:56:29,609 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:29,609 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:29,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-13 08:56:29,622 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-09-13 08:56:29,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-13 08:56:29,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-09-13 08:56:29,623 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 37 [2024-09-13 08:56:29,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:29,624 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-09-13 08:56:29,624 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:29,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:29,624 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-09-13 08:56:29,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 08:56:29,625 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:29,625 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:29,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-13 08:56:29,825 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:29,825 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:29,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:29,826 INFO L85 PathProgramCache]: Analyzing trace with hash 567096122, now seen corresponding path program 12 times [2024-09-13 08:56:29,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:29,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945563710] [2024-09-13 08:56:29,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:29,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:29,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:29,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:29,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-13 08:56:29,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:29,877 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:29,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945563710] [2024-09-13 08:56:29,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1945563710] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:29,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818112306] [2024-09-13 08:56:29,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:29,878 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:29,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:29,879 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) [2024-09-13 08:56:29,881 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 08:56:29,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-13 08:56:29,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:29,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-13 08:56:29,925 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:29,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:29,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818112306] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:29,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:29,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-13 08:56:29,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857220555] [2024-09-13 08:56:29,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:29,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-13 08:56:29,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:29,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-13 08:56:29,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-13 08:56:29,976 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:30,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:30,013 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2024-09-13 08:56:30,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-13 08:56:30,014 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-13 08:56:30,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:30,014 INFO L225 Difference]: With dead ends: 144 [2024-09-13 08:56:30,015 INFO L226 Difference]: Without dead ends: 91 [2024-09-13 08:56:30,016 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-13 08:56:30,016 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:30,017 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:30,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-13 08:56:30,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-09-13 08:56:30,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 79 states have internal predecessors, (91), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-13 08:56:30,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-09-13 08:56:30,028 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 37 [2024-09-13 08:56:30,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:30,028 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-09-13 08:56:30,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:30,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:30,029 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-09-13 08:56:30,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:56:30,029 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:30,029 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:30,042 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 08:56:30,233 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-13 08:56:30,234 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:30,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1478178501, now seen corresponding path program 13 times [2024-09-13 08:56:30,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:30,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90892849] [2024-09-13 08:56:30,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:30,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:30,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:30,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:30,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:30,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:30,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:30,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:30,489 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:30,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:30,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90892849] [2024-09-13 08:56:30,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90892849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:30,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323911591] [2024-09-13 08:56:30,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:30,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:30,490 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:30,492 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) [2024-09-13 08:56:30,493 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-13 08:56:30,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:30,536 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:56:30,536 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:30,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:30,663 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:30,751 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:30,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323911591] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:30,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:30,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-09-13 08:56:30,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981647491] [2024-09-13 08:56:30,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:30,752 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 08:56:30,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:30,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 08:56:30,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:56:30,753 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:31,044 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2024-09-13 08:56:31,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:56:31,045 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-13 08:56:31,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:31,046 INFO L225 Difference]: With dead ends: 127 [2024-09-13 08:56:31,046 INFO L226 Difference]: Without dead ends: 121 [2024-09-13 08:56:31,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:56:31,047 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:31,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 960 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:31,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-13 08:56:31,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-09-13 08:56:31,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 92 states have internal predecessors, (104), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-13 08:56:31,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-13 08:56:31,061 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 38 [2024-09-13 08:56:31,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:31,061 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-13 08:56:31,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:31,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:31,061 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-13 08:56:31,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-13 08:56:31,063 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:31,063 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:31,074 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:31,265 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:31,265 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:31,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:31,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1583594271, now seen corresponding path program 14 times [2024-09-13 08:56:31,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:31,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092813886] [2024-09-13 08:56:31,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:31,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:31,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:31,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:31,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:31,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:31,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:31,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:31,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:31,525 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:31,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092813886] [2024-09-13 08:56:31,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092813886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:31,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177676325] [2024-09-13 08:56:31,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:31,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:31,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:31,527 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) [2024-09-13 08:56:31,529 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-13 08:56:31,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:31,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:31,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-13 08:56:31,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:31,757 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:31,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:31,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:31,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177676325] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:31,848 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:31,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 28 [2024-09-13 08:56:31,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464807614] [2024-09-13 08:56:31,849 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:31,849 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-13 08:56:31,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:31,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-13 08:56:31,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:56:31,850 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:32,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:32,048 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2024-09-13 08:56:32,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 08:56:32,048 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-13 08:56:32,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:32,049 INFO L225 Difference]: With dead ends: 121 [2024-09-13 08:56:32,049 INFO L226 Difference]: Without dead ends: 115 [2024-09-13 08:56:32,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:56:32,050 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:32,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:32,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-13 08:56:32,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-13 08:56:32,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 08:56:32,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-09-13 08:56:32,064 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 38 [2024-09-13 08:56:32,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:32,064 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-09-13 08:56:32,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:32,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:32,065 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-09-13 08:56:32,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:56:32,065 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:32,066 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:32,077 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-13 08:56:32,266 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-13 08:56:32,266 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:32,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:32,267 INFO L85 PathProgramCache]: Analyzing trace with hash -368487758, now seen corresponding path program 15 times [2024-09-13 08:56:32,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:32,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26077274] [2024-09-13 08:56:32,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:32,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:32,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:32,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:32,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:32,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:32,488 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:32,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26077274] [2024-09-13 08:56:32,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26077274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:32,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842289972] [2024-09-13 08:56:32,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:32,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:32,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:32,490 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) [2024-09-13 08:56:32,491 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-13 08:56:32,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:56:32,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:32,538 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:56:32,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:32,710 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:32,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:32,994 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:32,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842289972] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:32,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:32,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-13 08:56:32,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763850395] [2024-09-13 08:56:32,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:32,995 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:56:32,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:32,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:56:32,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:56:32,996 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:33,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:33,269 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2024-09-13 08:56:33,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:56:33,271 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-13 08:56:33,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:33,272 INFO L225 Difference]: With dead ends: 137 [2024-09-13 08:56:33,272 INFO L226 Difference]: Without dead ends: 124 [2024-09-13 08:56:33,273 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 08:56:33,273 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:33,273 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 482 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:33,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-13 08:56:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2024-09-13 08:56:33,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 102 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-13 08:56:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2024-09-13 08:56:33,288 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 39 [2024-09-13 08:56:33,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:33,288 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2024-09-13 08:56:33,288 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:33,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2024-09-13 08:56:33,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:56:33,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:33,289 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:33,300 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:33,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-13 08:56:33,489 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:33,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1010991045, now seen corresponding path program 16 times [2024-09-13 08:56:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762429657] [2024-09-13 08:56:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:33,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:33,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:33,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:33,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762429657] [2024-09-13 08:56:33,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762429657] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:33,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111550922] [2024-09-13 08:56:33,696 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:33,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:33,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:33,698 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) [2024-09-13 08:56:33,699 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-13 08:56:33,741 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:33,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:33,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:56:33,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:33,894 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:33,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:34,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:34,165 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1111550922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:34,165 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:34,165 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-13 08:56:34,165 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54768268] [2024-09-13 08:56:34,165 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:34,166 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:56:34,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:34,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:56:34,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:56:34,167 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:34,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:34,408 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2024-09-13 08:56:34,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:56:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-13 08:56:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:34,411 INFO L225 Difference]: With dead ends: 130 [2024-09-13 08:56:34,413 INFO L226 Difference]: Without dead ends: 119 [2024-09-13 08:56:34,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-13 08:56:34,414 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:34,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 479 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-13 08:56:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-13 08:56:34,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 103 states have internal predecessors, (117), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-13 08:56:34,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-13 08:56:34,433 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 39 [2024-09-13 08:56:34,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:34,433 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-13 08:56:34,434 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:34,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:34,434 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-13 08:56:34,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:56:34,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:34,435 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:34,447 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:34,638 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:34,638 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:34,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:34,639 INFO L85 PathProgramCache]: Analyzing trace with hash 464480282, now seen corresponding path program 17 times [2024-09-13 08:56:34,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211775747] [2024-09-13 08:56:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:34,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:34,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:34,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:34,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:34,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:34,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:34,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:34,697 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:34,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211775747] [2024-09-13 08:56:34,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211775747] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:34,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275216326] [2024-09-13 08:56:34,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:34,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:34,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:34,699 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:34,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-13 08:56:34,748 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:56:34,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:34,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 08:56:34,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:34,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:34,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:34,809 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:34,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275216326] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:34,810 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:34,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-13 08:56:34,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445292375] [2024-09-13 08:56:34,810 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:34,810 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:56:34,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:34,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:56:34,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:56:34,811 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:34,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:34,867 INFO L93 Difference]: Finished difference Result 211 states and 258 transitions. [2024-09-13 08:56:34,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-09-13 08:56:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:34,868 INFO L225 Difference]: With dead ends: 211 [2024-09-13 08:56:34,868 INFO L226 Difference]: Without dead ends: 139 [2024-09-13 08:56:34,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:56:34,870 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:34,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:34,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-13 08:56:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-13 08:56:34,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 125 states have internal predecessors, (144), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-13 08:56:34,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2024-09-13 08:56:34,892 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2024-09-13 08:56:34,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:34,892 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2024-09-13 08:56:34,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:34,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:34,892 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2024-09-13 08:56:34,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-13 08:56:34,894 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:34,894 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:34,908 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:35,094 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-13 08:56:35,095 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:35,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:35,095 INFO L85 PathProgramCache]: Analyzing trace with hash -717756427, now seen corresponding path program 18 times [2024-09-13 08:56:35,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:35,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2023563433] [2024-09-13 08:56:35,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:35,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:35,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,117 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:35,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:35,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:35,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:35,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2023563433] [2024-09-13 08:56:35,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2023563433] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:35,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050434146] [2024-09-13 08:56:35,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:35,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:35,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:35,150 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:35,152 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-13 08:56:35,199 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:56:35,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:35,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-13 08:56:35,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:35,232 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:35,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:35,258 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-13 08:56:35,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050434146] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:35,258 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:35,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-13 08:56:35,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615641641] [2024-09-13 08:56:35,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:35,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 08:56:35,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:35,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 08:56:35,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-13 08:56:35,259 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:35,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:35,313 INFO L93 Difference]: Finished difference Result 179 states and 221 transitions. [2024-09-13 08:56:35,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 08:56:35,314 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-09-13 08:56:35,314 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:35,315 INFO L225 Difference]: With dead ends: 179 [2024-09-13 08:56:35,315 INFO L226 Difference]: Without dead ends: 161 [2024-09-13 08:56:35,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-13 08:56:35,316 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:35,316 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:35,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-13 08:56:35,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-09-13 08:56:35,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 147 states have internal predecessors, (171), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-13 08:56:35,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2024-09-13 08:56:35,348 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 39 [2024-09-13 08:56:35,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:35,348 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2024-09-13 08:56:35,348 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:35,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:35,348 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2024-09-13 08:56:35,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:56:35,349 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:35,349 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:35,361 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:35,553 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-13 08:56:35,553 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:35,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:35,554 INFO L85 PathProgramCache]: Analyzing trace with hash -223332356, now seen corresponding path program 19 times [2024-09-13 08:56:35,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:35,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311368248] [2024-09-13 08:56:35,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:35,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:35,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:35,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:35,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,709 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:35,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,819 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:35,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311368248] [2024-09-13 08:56:35,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311368248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:35,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884780147] [2024-09-13 08:56:35,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:35,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:35,820 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:35,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:35,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-13 08:56:35,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:35,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:56:35,863 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:35,970 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:35,970 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:36,055 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:36,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884780147] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:36,055 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:36,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2024-09-13 08:56:36,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843289929] [2024-09-13 08:56:36,056 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:36,056 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:56:36,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:36,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:56:36,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:56:36,057 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:36,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:36,363 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-13 08:56:36,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:56:36,363 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-13 08:56:36,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:36,364 INFO L225 Difference]: With dead ends: 207 [2024-09-13 08:56:36,364 INFO L226 Difference]: Without dead ends: 201 [2024-09-13 08:56:36,365 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:56:36,366 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:36,366 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1258 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:36,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-13 08:56:36,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 175. [2024-09-13 08:56:36,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 160 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-13 08:56:36,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-09-13 08:56:36,390 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 40 [2024-09-13 08:56:36,390 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:36,390 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-09-13 08:56:36,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:36,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:36,390 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-09-13 08:56:36,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:56:36,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:36,391 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:36,403 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-13 08:56:36,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-13 08:56:36,592 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:36,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 796563891, now seen corresponding path program 20 times [2024-09-13 08:56:36,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:36,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110238380] [2024-09-13 08:56:36,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:36,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:36,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:36,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:36,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:36,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:36,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:36,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-13 08:56:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:36,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:56:36,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110238380] [2024-09-13 08:56:36,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110238380] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:36,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124568591] [2024-09-13 08:56:36,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:36,778 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:36,779 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:36,779 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:36,780 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-13 08:56:36,823 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:36,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:36,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:56:36,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:36,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:56:36,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:37,147 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:56:37,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1124568591] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:37,148 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:37,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-13 08:56:37,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108675626] [2024-09-13 08:56:37,148 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:37,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 08:56:37,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:37,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 08:56:37,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:56:37,149 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:37,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:37,336 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-13 08:56:37,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:37,337 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-13 08:56:37,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:37,338 INFO L225 Difference]: With dead ends: 207 [2024-09-13 08:56:37,338 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 08:56:37,339 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-13 08:56:37,340 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:37,341 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 389 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:37,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 08:56:37,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2024-09-13 08:56:37,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 171 states have internal predecessors, (188), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-13 08:56:37,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2024-09-13 08:56:37,372 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 40 [2024-09-13 08:56:37,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:37,373 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2024-09-13 08:56:37,373 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:37,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2024-09-13 08:56:37,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:56:37,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:37,374 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:37,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-13 08:56:37,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:37,575 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:37,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:37,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1988964868, now seen corresponding path program 21 times [2024-09-13 08:56:37,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:37,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025368039] [2024-09-13 08:56:37,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:37,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:37,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:37,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:37,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:37,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:37,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:37,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025368039] [2024-09-13 08:56:37,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025368039] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:37,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227005897] [2024-09-13 08:56:37,897 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:37,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:37,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:37,899 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:37,900 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-13 08:56:37,948 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-13 08:56:37,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:37,949 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:56:37,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:38,112 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:38,208 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:38,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227005897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:38,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:38,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 30 [2024-09-13 08:56:38,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061085054] [2024-09-13 08:56:38,209 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:38,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-13 08:56:38,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:38,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-13 08:56:38,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2024-09-13 08:56:38,210 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:38,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:38,442 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-09-13 08:56:38,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:56:38,442 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-13 08:56:38,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:38,444 INFO L225 Difference]: With dead ends: 205 [2024-09-13 08:56:38,444 INFO L226 Difference]: Without dead ends: 191 [2024-09-13 08:56:38,445 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:56:38,445 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:38,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 796 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:38,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-13 08:56:38,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2024-09-13 08:56:38,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 169 states have internal predecessors, (187), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-13 08:56:38,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2024-09-13 08:56:38,479 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 40 [2024-09-13 08:56:38,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:38,479 INFO L474 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2024-09-13 08:56:38,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:38,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:38,479 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2024-09-13 08:56:38,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-13 08:56:38,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:38,481 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:38,495 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:38,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:38,681 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:38,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:38,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1164125907, now seen corresponding path program 22 times [2024-09-13 08:56:38,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:38,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2056158398] [2024-09-13 08:56:38,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:38,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:38,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:38,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:38,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:38,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:38,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:38,851 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-13 08:56:38,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2056158398] [2024-09-13 08:56:38,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2056158398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:38,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790458830] [2024-09-13 08:56:38,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:38,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:38,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:38,853 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:38,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-13 08:56:38,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:38,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:38,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:56:38,894 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:38,992 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:56:38,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:39,194 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-13 08:56:39,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790458830] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:39,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:39,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-13 08:56:39,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205643291] [2024-09-13 08:56:39,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:39,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 08:56:39,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:39,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 08:56:39,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:56:39,196 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:39,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:39,375 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-09-13 08:56:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:39,376 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-13 08:56:39,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:39,377 INFO L225 Difference]: With dead ends: 199 [2024-09-13 08:56:39,377 INFO L226 Difference]: Without dead ends: 181 [2024-09-13 08:56:39,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-13 08:56:39,378 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:39,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 403 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-13 08:56:39,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2024-09-13 08:56:39,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 161 states have internal predecessors, (177), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-13 08:56:39,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2024-09-13 08:56:39,405 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 40 [2024-09-13 08:56:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:39,405 INFO L474 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2024-09-13 08:56:39,405 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:39,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:39,406 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2024-09-13 08:56:39,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:56:39,407 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:39,407 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:39,418 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:39,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-13 08:56:39,608 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:39,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:39,609 INFO L85 PathProgramCache]: Analyzing trace with hash -1575716773, now seen corresponding path program 23 times [2024-09-13 08:56:39,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:39,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194547764] [2024-09-13 08:56:39,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:39,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:39,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:39,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:39,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:39,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:39,833 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194547764] [2024-09-13 08:56:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194547764] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106349635] [2024-09-13 08:56:39,834 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:39,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:39,834 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:39,836 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:39,837 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-13 08:56:39,886 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:56:39,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:39,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:56:39,888 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:40,081 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:40,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:40,420 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:40,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106349635] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:40,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:40,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-13 08:56:40,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713916650] [2024-09-13 08:56:40,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:40,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:56:40,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:40,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:56:40,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:56:40,422 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:40,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:40,818 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2024-09-13 08:56:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 08:56:40,819 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-13 08:56:40,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:40,820 INFO L225 Difference]: With dead ends: 219 [2024-09-13 08:56:40,820 INFO L226 Difference]: Without dead ends: 206 [2024-09-13 08:56:40,822 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 08:56:40,822 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:40,822 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 507 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:40,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-13 08:56:40,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2024-09-13 08:56:40,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 179 states have internal predecessors, (197), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-13 08:56:40,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-09-13 08:56:40,856 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2024-09-13 08:56:40,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:40,856 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-09-13 08:56:40,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:40,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:40,857 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-09-13 08:56:40,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:56:40,858 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:40,858 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:40,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-13 08:56:41,062 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-13 08:56:41,062 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:41,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:41,063 INFO L85 PathProgramCache]: Analyzing trace with hash -18482190, now seen corresponding path program 24 times [2024-09-13 08:56:41,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:41,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107501402] [2024-09-13 08:56:41,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:41,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:41,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:41,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:41,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:41,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:41,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:41,282 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:41,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107501402] [2024-09-13 08:56:41,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107501402] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:41,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110544443] [2024-09-13 08:56:41,282 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:41,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:41,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:41,284 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:41,285 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-13 08:56:41,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:56:41,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:41,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:56:41,333 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:41,549 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:41,894 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:41,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110544443] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:41,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:41,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-13 08:56:41,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062858559] [2024-09-13 08:56:41,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:41,895 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:56:41,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:41,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:56:41,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:56:41,895 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:42,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:42,244 INFO L93 Difference]: Finished difference Result 212 states and 253 transitions. [2024-09-13 08:56:42,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 08:56:42,244 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-13 08:56:42,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:42,246 INFO L225 Difference]: With dead ends: 212 [2024-09-13 08:56:42,246 INFO L226 Difference]: Without dead ends: 201 [2024-09-13 08:56:42,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 08:56:42,247 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:42,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:42,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-13 08:56:42,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-09-13 08:56:42,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 160 states have (on average 1.2375) internal successors, (198), 180 states have internal predecessors, (198), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-13 08:56:42,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2024-09-13 08:56:42,284 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 41 [2024-09-13 08:56:42,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:42,285 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2024-09-13 08:56:42,285 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:42,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:42,285 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2024-09-13 08:56:42,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:56:42,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:42,286 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:42,299 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-13 08:56:42,486 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-13 08:56:42,487 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:42,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:42,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1486012337, now seen corresponding path program 25 times [2024-09-13 08:56:42,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:42,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588957688] [2024-09-13 08:56:42,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:42,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:42,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:42,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,547 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:42,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588957688] [2024-09-13 08:56:42,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588957688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:42,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718903820] [2024-09-13 08:56:42,547 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:42,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:42,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:42,549 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:42,550 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-13 08:56:42,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,601 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:56:42,602 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:42,627 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:42,627 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:42,656 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [718903820] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:42,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-13 08:56:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590017617] [2024-09-13 08:56:42,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:42,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:56:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:42,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:56:42,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:56:42,657 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:42,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:42,723 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2024-09-13 08:56:42,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:42,723 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-09-13 08:56:42,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:42,724 INFO L225 Difference]: With dead ends: 214 [2024-09-13 08:56:42,724 INFO L226 Difference]: Without dead ends: 198 [2024-09-13 08:56:42,725 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:56:42,725 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:42,726 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 139 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:42,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-09-13 08:56:42,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2024-09-13 08:56:42,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 171 states have internal predecessors, (189), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-13 08:56:42,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-09-13 08:56:42,764 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 41 [2024-09-13 08:56:42,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:42,764 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-09-13 08:56:42,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:42,765 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-09-13 08:56:42,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-13 08:56:42,766 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:42,766 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:42,778 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-13 08:56:42,966 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-13 08:56:42,967 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:42,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:42,967 INFO L85 PathProgramCache]: Analyzing trace with hash 1010741786, now seen corresponding path program 26 times [2024-09-13 08:56:42,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:42,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020970129] [2024-09-13 08:56:42,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:42,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:42,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:42,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:42,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-13 08:56:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,031 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:43,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:43,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020970129] [2024-09-13 08:56:43,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020970129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:43,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58763408] [2024-09-13 08:56:43,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:43,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:43,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:43,033 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:43,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-13 08:56:43,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:43,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:43,079 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-13 08:56:43,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:43,105 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:43,105 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:43,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [58763408] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:43,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:43,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-13 08:56:43,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176106960] [2024-09-13 08:56:43,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:43,136 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 08:56:43,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:43,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 08:56:43,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-13 08:56:43,136 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:43,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:43,201 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2024-09-13 08:56:43,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 08:56:43,202 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-09-13 08:56:43,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:43,203 INFO L225 Difference]: With dead ends: 300 [2024-09-13 08:56:43,203 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 08:56:43,204 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:56:43,205 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:43,205 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:43,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 08:56:43,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-13 08:56:43,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-13 08:56:43,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2024-09-13 08:56:43,239 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 41 [2024-09-13 08:56:43,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:43,239 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2024-09-13 08:56:43,239 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:43,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:43,240 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2024-09-13 08:56:43,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 08:56:43,240 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:43,241 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:43,252 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-13 08:56:43,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:43,441 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:43,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:43,441 INFO L85 PathProgramCache]: Analyzing trace with hash 479671077, now seen corresponding path program 27 times [2024-09-13 08:56:43,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:43,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211956780] [2024-09-13 08:56:43,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:43,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:43,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:43,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:43,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:43,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:43,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211956780] [2024-09-13 08:56:43,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211956780] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:43,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339081056] [2024-09-13 08:56:43,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:43,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:43,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:43,759 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:43,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-13 08:56:43,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:56:43,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:43,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:56:43,813 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:43,924 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:43,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:44,005 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:44,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339081056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:44,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:44,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 32 [2024-09-13 08:56:44,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303418144] [2024-09-13 08:56:44,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:44,006 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:56:44,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:44,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:56:44,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:44,007 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:44,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:44,354 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2024-09-13 08:56:44,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:56:44,355 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-13 08:56:44,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:44,357 INFO L225 Difference]: With dead ends: 245 [2024-09-13 08:56:44,357 INFO L226 Difference]: Without dead ends: 239 [2024-09-13 08:56:44,358 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:56:44,358 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:44,358 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1488 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:44,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-13 08:56:44,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2024-09-13 08:56:44,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 171 states have (on average 1.2105263157894737) internal successors, (207), 189 states have internal predecessors, (207), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-13 08:56:44,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2024-09-13 08:56:44,396 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 42 [2024-09-13 08:56:44,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:44,396 INFO L474 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2024-09-13 08:56:44,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:44,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:44,396 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2024-09-13 08:56:44,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 08:56:44,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:44,398 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:44,409 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:44,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-13 08:56:44,598 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:44,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:44,599 INFO L85 PathProgramCache]: Analyzing trace with hash -432732607, now seen corresponding path program 28 times [2024-09-13 08:56:44,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:44,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [762711348] [2024-09-13 08:56:44,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:44,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:44,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:44,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:44,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:44,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:44,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:44,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:44,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:44,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [762711348] [2024-09-13 08:56:44,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [762711348] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:44,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [759203336] [2024-09-13 08:56:44,858 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:44,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:44,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:44,860 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:44,861 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-13 08:56:44,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:44,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:44,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:56:44,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:45,108 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:45,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:45,193 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:45,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [759203336] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:45,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:45,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 32 [2024-09-13 08:56:45,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151149308] [2024-09-13 08:56:45,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:45,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:56:45,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:45,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:56:45,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:45,195 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:45,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:45,473 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-13 08:56:45,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:56:45,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-13 08:56:45,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:45,474 INFO L225 Difference]: With dead ends: 213 [2024-09-13 08:56:45,474 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 08:56:45,475 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:56:45,476 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:45,476 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1090 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:45,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 08:56:45,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-13 08:56:45,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2024-09-13 08:56:45,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2024-09-13 08:56:45,511 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 42 [2024-09-13 08:56:45,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:45,511 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2024-09-13 08:56:45,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:45,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:45,512 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2024-09-13 08:56:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 08:56:45,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:45,513 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:45,525 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:45,713 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-13 08:56:45,714 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:45,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:45,714 INFO L85 PathProgramCache]: Analyzing trace with hash -49232091, now seen corresponding path program 29 times [2024-09-13 08:56:45,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:45,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150889770] [2024-09-13 08:56:45,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:45,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:45,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:45,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:45,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:45,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:45,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:45,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:45,958 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:45,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150889770] [2024-09-13 08:56:45,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150889770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:45,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337675394] [2024-09-13 08:56:45,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:45,958 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:45,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:45,959 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:45,960 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-13 08:56:46,007 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:56:46,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:46,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-13 08:56:46,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:46,187 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:46,187 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:46,259 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:46,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337675394] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:46,260 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:46,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2024-09-13 08:56:46,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271352] [2024-09-13 08:56:46,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:46,260 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:56:46,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:46,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:56:46,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:46,261 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:46,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:46,479 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2024-09-13 08:56:46,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:56:46,480 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-13 08:56:46,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:46,481 INFO L225 Difference]: With dead ends: 209 [2024-09-13 08:56:46,481 INFO L226 Difference]: Without dead ends: 203 [2024-09-13 08:56:46,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:56:46,482 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:46,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 709 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:46,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-13 08:56:46,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-09-13 08:56:46,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.2181818181818183) internal successors, (201), 183 states have internal predecessors, (201), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-13 08:56:46,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2024-09-13 08:56:46,534 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 42 [2024-09-13 08:56:46,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:46,535 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2024-09-13 08:56:46,535 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:46,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:46,535 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2024-09-13 08:56:46,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:56:46,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:46,536 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:46,550 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:46,737 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-13 08:56:46,737 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:46,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:46,737 INFO L85 PathProgramCache]: Analyzing trace with hash -1257446830, now seen corresponding path program 30 times [2024-09-13 08:56:46,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:46,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317082314] [2024-09-13 08:56:46,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:46,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:46,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:46,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:46,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:46,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:46,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:46,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:46,963 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:46,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:46,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317082314] [2024-09-13 08:56:46,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317082314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:46,963 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382247384] [2024-09-13 08:56:46,963 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:46,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:46,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:46,965 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:46,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-13 08:56:47,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:56:47,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:47,016 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:56:47,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:47,257 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:47,257 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:47,761 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:47,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382247384] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:47,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:47,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-13 08:56:47,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762692185] [2024-09-13 08:56:47,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:47,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:56:47,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:47,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:56:47,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:56:47,763 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:48,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:48,248 INFO L93 Difference]: Finished difference Result 243 states and 289 transitions. [2024-09-13 08:56:48,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:56:48,248 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-13 08:56:48,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:48,250 INFO L225 Difference]: With dead ends: 243 [2024-09-13 08:56:48,250 INFO L226 Difference]: Without dead ends: 230 [2024-09-13 08:56:48,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 08:56:48,252 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:48,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 560 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:48,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-13 08:56:48,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-09-13 08:56:48,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 203 states have internal predecessors, (223), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-09-13 08:56:48,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2024-09-13 08:56:48,306 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 43 [2024-09-13 08:56:48,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:48,306 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2024-09-13 08:56:48,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:48,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:48,306 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2024-09-13 08:56:48,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:56:48,307 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:48,307 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:48,320 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-13 08:56:48,511 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-13 08:56:48,511 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:48,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:48,512 INFO L85 PathProgramCache]: Analyzing trace with hash -227815013, now seen corresponding path program 31 times [2024-09-13 08:56:48,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:48,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084942129] [2024-09-13 08:56:48,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:48,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:48,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:48,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:48,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:48,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:48,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:48,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:48,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:48,759 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:48,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:48,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084942129] [2024-09-13 08:56:48,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084942129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:48,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970370397] [2024-09-13 08:56:48,760 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:48,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:48,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:48,761 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:48,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-13 08:56:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:48,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:56:48,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:49,045 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:49,045 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:49,468 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:49,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970370397] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:49,469 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:49,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-13 08:56:49,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58284397] [2024-09-13 08:56:49,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:49,469 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:56:49,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:49,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:56:49,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:56:49,470 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:49,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:49,985 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2024-09-13 08:56:49,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:56:49,986 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-13 08:56:49,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:49,987 INFO L225 Difference]: With dead ends: 236 [2024-09-13 08:56:49,987 INFO L226 Difference]: Without dead ends: 225 [2024-09-13 08:56:49,988 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-13 08:56:49,989 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:49,989 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 714 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:49,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-13 08:56:50,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-09-13 08:56:50,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 204 states have internal predecessors, (224), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-13 08:56:50,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 263 transitions. [2024-09-13 08:56:50,036 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 263 transitions. Word has length 43 [2024-09-13 08:56:50,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:50,036 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 263 transitions. [2024-09-13 08:56:50,036 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:50,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:50,037 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 263 transitions. [2024-09-13 08:56:50,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:56:50,038 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:50,038 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:50,050 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-13 08:56:50,238 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:50,239 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:50,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:50,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1451316090, now seen corresponding path program 32 times [2024-09-13 08:56:50,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:50,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674663080] [2024-09-13 08:56:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:50,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:50,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:50,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:50,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:50,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,303 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:50,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674663080] [2024-09-13 08:56:50,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674663080] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:50,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2109601355] [2024-09-13 08:56:50,304 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:50,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:50,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:50,305 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:50,305 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-13 08:56:50,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:50,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:50,355 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 08:56:50,355 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:50,390 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:50,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:50,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2109601355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:50,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:50,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-13 08:56:50,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653993067] [2024-09-13 08:56:50,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:50,420 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 08:56:50,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:50,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 08:56:50,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:56:50,421 INFO L87 Difference]: Start difference. First operand 223 states and 263 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:50,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:50,519 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2024-09-13 08:56:50,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 08:56:50,519 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-09-13 08:56:50,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:50,522 INFO L225 Difference]: With dead ends: 391 [2024-09-13 08:56:50,522 INFO L226 Difference]: Without dead ends: 261 [2024-09-13 08:56:50,523 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:56:50,526 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:50,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:50,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-09-13 08:56:50,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-09-13 08:56:50,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 222 states have (on average 1.2117117117117118) internal successors, (269), 242 states have internal predecessors, (269), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-13 08:56:50,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2024-09-13 08:56:50,583 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 43 [2024-09-13 08:56:50,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:50,583 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2024-09-13 08:56:50,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:50,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:50,583 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2024-09-13 08:56:50,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-13 08:56:50,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:50,584 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:50,596 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-13 08:56:50,785 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-09-13 08:56:50,785 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:50,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:50,785 INFO L85 PathProgramCache]: Analyzing trace with hash -397169103, now seen corresponding path program 33 times [2024-09-13 08:56:50,786 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:50,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847841546] [2024-09-13 08:56:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:50,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:50,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:50,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:50,864 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:50,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847841546] [2024-09-13 08:56:50,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847841546] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:50,865 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232913116] [2024-09-13 08:56:50,865 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:50,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:50,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:50,866 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:50,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-13 08:56:50,926 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:56:50,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:50,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-13 08:56:50,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:50,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:51,015 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-13 08:56:51,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232913116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:51,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:51,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-13 08:56:51,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22546357] [2024-09-13 08:56:51,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:51,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-13 08:56:51,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:51,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-13 08:56:51,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-13 08:56:51,016 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:51,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:51,138 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2024-09-13 08:56:51,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 08:56:51,139 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-09-13 08:56:51,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:51,140 INFO L225 Difference]: With dead ends: 323 [2024-09-13 08:56:51,140 INFO L226 Difference]: Without dead ends: 299 [2024-09-13 08:56:51,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-13 08:56:51,142 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:51,142 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:56:51,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-13 08:56:51,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-13 08:56:51,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-13 08:56:51,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 353 transitions. [2024-09-13 08:56:51,205 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 353 transitions. Word has length 43 [2024-09-13 08:56:51,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:51,206 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 353 transitions. [2024-09-13 08:56:51,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:56:51,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:51,206 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 353 transitions. [2024-09-13 08:56:51,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:56:51,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:51,208 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:51,220 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:51,408 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-13 08:56:51,409 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:51,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:51,409 INFO L85 PathProgramCache]: Analyzing trace with hash -1714679140, now seen corresponding path program 34 times [2024-09-13 08:56:51,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:51,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778231530] [2024-09-13 08:56:51,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:51,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:51,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:51,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:51,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:51,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:51,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:51,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:51,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:51,721 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:51,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778231530] [2024-09-13 08:56:51,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778231530] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:51,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213999855] [2024-09-13 08:56:51,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:56:51,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:51,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:51,723 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:51,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-13 08:56:51,785 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:56:51,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:51,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:56:51,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:51,926 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:51,926 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:52,021 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:56:52,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1213999855] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:52,021 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:52,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 34 [2024-09-13 08:56:52,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622040583] [2024-09-13 08:56:52,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:52,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:56:52,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:52,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:56:52,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:56:52,023 INFO L87 Difference]: Start difference. First operand 299 states and 353 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:52,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:52,491 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2024-09-13 08:56:52,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:56:52,492 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-13 08:56:52,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:52,494 INFO L225 Difference]: With dead ends: 363 [2024-09-13 08:56:52,494 INFO L226 Difference]: Without dead ends: 357 [2024-09-13 08:56:52,495 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:56:52,496 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:52,496 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1994 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:56:52,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-09-13 08:56:52,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 313. [2024-09-13 08:56:52,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 271 states have (on average 1.2066420664206643) internal successors, (327), 293 states have internal predecessors, (327), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-09-13 08:56:52,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2024-09-13 08:56:52,564 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 44 [2024-09-13 08:56:52,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:52,564 INFO L474 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2024-09-13 08:56:52,564 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:52,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:52,564 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2024-09-13 08:56:52,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:56:52,566 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:52,566 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:52,577 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-13 08:56:52,766 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:52,766 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:52,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:52,767 INFO L85 PathProgramCache]: Analyzing trace with hash 403829916, now seen corresponding path program 35 times [2024-09-13 08:56:52,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:52,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954996252] [2024-09-13 08:56:52,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:52,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:52,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:52,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:52,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:52,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:52,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:52,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:53,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:53,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954996252] [2024-09-13 08:56:53,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954996252] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:53,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307859844] [2024-09-13 08:56:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:56:53,116 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:53,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:53,117 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:53,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-13 08:56:53,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:56:53,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:53,179 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-13 08:56:53,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:53,369 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:53,370 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:53,428 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:56:53,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307859844] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:53,428 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:53,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 34 [2024-09-13 08:56:53,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614174185] [2024-09-13 08:56:53,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:53,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:56:53,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:53,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:56:53,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1043, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:56:53,430 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:53,808 INFO L93 Difference]: Finished difference Result 319 states and 375 transitions. [2024-09-13 08:56:53,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:56:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-13 08:56:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:53,809 INFO L225 Difference]: With dead ends: 319 [2024-09-13 08:56:53,809 INFO L226 Difference]: Without dead ends: 299 [2024-09-13 08:56:53,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:56:53,811 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:53,811 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1347 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:56:53,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-13 08:56:53,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-13 08:56:53,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-13 08:56:53,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 354 transitions. [2024-09-13 08:56:53,886 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 354 transitions. Word has length 44 [2024-09-13 08:56:53,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:53,887 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 354 transitions. [2024-09-13 08:56:53,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:53,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:53,887 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 354 transitions. [2024-09-13 08:56:53,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:56:53,888 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:53,888 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:53,899 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:54,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-13 08:56:54,089 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:54,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:54,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1740504941, now seen corresponding path program 36 times [2024-09-13 08:56:54,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:54,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678695688] [2024-09-13 08:56:54,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:54,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:54,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:54,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:54,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:54,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:54,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:54,194 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-13 08:56:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:54,308 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 08:56:54,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:54,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678695688] [2024-09-13 08:56:54,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678695688] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:54,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982714237] [2024-09-13 08:56:54,309 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:56:54,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:54,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:54,310 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:54,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-13 08:56:54,368 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:56:54,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:54,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:56:54,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:54,545 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:56:54,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:54,824 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:56:54,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982714237] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:54,824 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:54,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-13 08:56:54,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970571536] [2024-09-13 08:56:54,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:54,825 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:56:54,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:54,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:56:54,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:54,826 INFO L87 Difference]: Start difference. First operand 299 states and 354 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:55,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:55,192 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2024-09-13 08:56:55,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:56:55,192 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-13 08:56:55,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:55,195 INFO L225 Difference]: With dead ends: 343 [2024-09-13 08:56:55,195 INFO L226 Difference]: Without dead ends: 328 [2024-09-13 08:56:55,197 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 08:56:55,197 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:55,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 454 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:55,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-09-13 08:56:55,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2024-09-13 08:56:55,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 300 states have internal predecessors, (323), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-13 08:56:55,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 383 transitions. [2024-09-13 08:56:55,268 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 383 transitions. Word has length 44 [2024-09-13 08:56:55,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:55,268 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 383 transitions. [2024-09-13 08:56:55,268 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:55,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:55,269 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 383 transitions. [2024-09-13 08:56:55,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:56:55,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:55,271 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:55,282 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:55,474 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:55,475 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:55,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:55,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1448463004, now seen corresponding path program 37 times [2024-09-13 08:56:55,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:55,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813017957] [2024-09-13 08:56:55,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:55,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:55,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:55,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:55,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:55,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:55,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:55,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:55,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:55,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813017957] [2024-09-13 08:56:55,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813017957] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:55,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661139909] [2024-09-13 08:56:55,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:56:55,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:55,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:55,724 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:55,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-13 08:56:55,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:55,775 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:56:55,776 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:55,952 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:55,952 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:56,035 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:56:56,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661139909] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:56,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:56,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 34 [2024-09-13 08:56:56,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299097787] [2024-09-13 08:56:56,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:56,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-13 08:56:56,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:56,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-13 08:56:56,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:56:56,036 INFO L87 Difference]: Start difference. First operand 324 states and 383 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:56,328 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2024-09-13 08:56:56,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:56:56,328 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-13 08:56:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:56,331 INFO L225 Difference]: With dead ends: 340 [2024-09-13 08:56:56,331 INFO L226 Difference]: Without dead ends: 325 [2024-09-13 08:56:56,333 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:56:56,333 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:56,333 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 930 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:56:56,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-09-13 08:56:56,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2024-09-13 08:56:56,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 267 states have (on average 1.202247191011236) internal successors, (321), 297 states have internal predecessors, (321), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-13 08:56:56,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 381 transitions. [2024-09-13 08:56:56,412 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 381 transitions. Word has length 44 [2024-09-13 08:56:56,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:56,412 INFO L474 AbstractCegarLoop]: Abstraction has 321 states and 381 transitions. [2024-09-13 08:56:56,412 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:56:56,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:56,413 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 381 transitions. [2024-09-13 08:56:56,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-13 08:56:56,414 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:56,415 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:56,426 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:56,615 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-13 08:56:56,615 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:56,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:56,615 INFO L85 PathProgramCache]: Analyzing trace with hash -296415821, now seen corresponding path program 38 times [2024-09-13 08:56:56,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:56,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220810980] [2024-09-13 08:56:56,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:56,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:56,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:56,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:56,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:56,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:56,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:56,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:56:56,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:56,794 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-13 08:56:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:56,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220810980] [2024-09-13 08:56:56,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220810980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:56,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151573412] [2024-09-13 08:56:56,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:56:56,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:56,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:56,796 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:56,796 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-13 08:56:56,847 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:56:56,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:56,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-13 08:56:56,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:56,983 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:56:56,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:57,238 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-13 08:56:57,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151573412] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:57,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:57,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-13 08:56:57,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851520879] [2024-09-13 08:56:57,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:57,239 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-13 08:56:57,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:57,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-13 08:56:57,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-13 08:56:57,240 INFO L87 Difference]: Start difference. First operand 321 states and 381 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:57,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:57,541 INFO L93 Difference]: Finished difference Result 333 states and 392 transitions. [2024-09-13 08:56:57,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 08:56:57,542 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-13 08:56:57,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:57,543 INFO L225 Difference]: With dead ends: 333 [2024-09-13 08:56:57,543 INFO L226 Difference]: Without dead ends: 313 [2024-09-13 08:56:57,545 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-13 08:56:57,546 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:57,546 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 446 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:56:57,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-09-13 08:56:57,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2024-09-13 08:56:57,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 257 states have (on average 1.2023346303501945) internal successors, (309), 287 states have internal predecessors, (309), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2024-09-13 08:56:57,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2024-09-13 08:56:57,617 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 44 [2024-09-13 08:56:57,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:57,617 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2024-09-13 08:56:57,617 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:57,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:57,618 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2024-09-13 08:56:57,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:56:57,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:57,620 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:57,631 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-13 08:56:57,820 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-13 08:56:57,820 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:56:57,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:57,821 INFO L85 PathProgramCache]: Analyzing trace with hash -562826821, now seen corresponding path program 39 times [2024-09-13 08:56:57,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:56:57,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2125832153] [2024-09-13 08:56:57,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:56:57,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:56:57,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:57,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:56:57,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:57,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:56:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:57,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:56:57,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:56:58,097 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:58,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:56:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2125832153] [2024-09-13 08:56:58,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2125832153] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:56:58,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901494143] [2024-09-13 08:56:58,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:56:58,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:56:58,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:56:58,099 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:56:58,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-13 08:56:58,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:56:58,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:56:58,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:56:58,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:56:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:58,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:56:59,001 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:56:59,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901494143] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:56:59,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:56:59,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-13 08:56:59,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788911827] [2024-09-13 08:56:59,002 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:56:59,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:56:59,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:56:59,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:56:59,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:56:59,003 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:59,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:56:59,828 INFO L93 Difference]: Finished difference Result 371 states and 438 transitions. [2024-09-13 08:56:59,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 08:56:59,828 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-13 08:56:59,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:56:59,831 INFO L225 Difference]: With dead ends: 371 [2024-09-13 08:56:59,831 INFO L226 Difference]: Without dead ends: 358 [2024-09-13 08:56:59,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 08:56:59,834 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:56:59,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 732 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:56:59,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-09-13 08:56:59,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2024-09-13 08:56:59,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 290 states have (on average 1.2) internal successors, (348), 324 states have internal predecessors, (348), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2024-09-13 08:56:59,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 412 transitions. [2024-09-13 08:56:59,919 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 412 transitions. Word has length 45 [2024-09-13 08:56:59,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:56:59,920 INFO L474 AbstractCegarLoop]: Abstraction has 350 states and 412 transitions. [2024-09-13 08:56:59,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:56:59,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:56:59,920 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 412 transitions. [2024-09-13 08:56:59,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:56:59,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:56:59,922 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:56:59,935 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:00,123 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-13 08:57:00,123 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:00,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 1290988434, now seen corresponding path program 40 times [2024-09-13 08:57:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082994561] [2024-09-13 08:57:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:00,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:00,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:00,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:00,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:00,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:00,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:00,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:00,402 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:00,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082994561] [2024-09-13 08:57:00,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082994561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:00,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706059968] [2024-09-13 08:57:00,402 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:00,402 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:00,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:00,403 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:00,404 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-13 08:57:00,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:00,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:00,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:57:00,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:00,775 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:00,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:01,339 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:01,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706059968] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:01,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:01,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-13 08:57:01,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14545932] [2024-09-13 08:57:01,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:01,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:57:01,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:01,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:57:01,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:57:01,341 INFO L87 Difference]: Start difference. First operand 350 states and 412 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:02,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:02,045 INFO L93 Difference]: Finished difference Result 364 states and 426 transitions. [2024-09-13 08:57:02,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 08:57:02,046 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-13 08:57:02,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:02,048 INFO L225 Difference]: With dead ends: 364 [2024-09-13 08:57:02,048 INFO L226 Difference]: Without dead ends: 353 [2024-09-13 08:57:02,050 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-13 08:57:02,050 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:02,050 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 799 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:02,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-09-13 08:57:02,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2024-09-13 08:57:02,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 291 states have (on average 1.1993127147766323) internal successors, (349), 325 states have internal predecessors, (349), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-13 08:57:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 410 transitions. [2024-09-13 08:57:02,146 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 410 transitions. Word has length 45 [2024-09-13 08:57:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:02,146 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 410 transitions. [2024-09-13 08:57:02,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:02,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 410 transitions. [2024-09-13 08:57:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:57:02,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:02,149 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:02,160 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2024-09-13 08:57:02,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-13 08:57:02,352 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:02,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:02,353 INFO L85 PathProgramCache]: Analyzing trace with hash 973220789, now seen corresponding path program 41 times [2024-09-13 08:57:02,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:02,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774744463] [2024-09-13 08:57:02,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:02,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:02,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:02,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:02,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:02,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:02,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:02,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:02,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:02,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:02,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774744463] [2024-09-13 08:57:02,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774744463] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:02,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216349020] [2024-09-13 08:57:02,418 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:02,418 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:02,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:02,419 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:02,419 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-13 08:57:02,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:57:02,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:02,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:57:02,476 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:02,511 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:02,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:02,550 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:02,550 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216349020] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:02,550 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:02,550 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-13 08:57:02,550 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190954661] [2024-09-13 08:57:02,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:02,551 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:57:02,551 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:02,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:57:02,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:57:02,551 INFO L87 Difference]: Start difference. First operand 351 states and 410 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:02,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:02,690 INFO L93 Difference]: Finished difference Result 372 states and 435 transitions. [2024-09-13 08:57:02,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 08:57:02,693 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-09-13 08:57:02,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:02,695 INFO L225 Difference]: With dead ends: 372 [2024-09-13 08:57:02,695 INFO L226 Difference]: Without dead ends: 352 [2024-09-13 08:57:02,697 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:57:02,698 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:02,698 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:02,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-13 08:57:02,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2024-09-13 08:57:02,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 288 states have (on average 1.1875) internal successors, (342), 318 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-13 08:57:02,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 395 transitions. [2024-09-13 08:57:02,800 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 395 transitions. Word has length 45 [2024-09-13 08:57:02,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:02,800 INFO L474 AbstractCegarLoop]: Abstraction has 342 states and 395 transitions. [2024-09-13 08:57:02,800 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:02,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:02,800 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 395 transitions. [2024-09-13 08:57:02,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-13 08:57:02,802 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:02,802 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:02,816 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:03,003 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:03,003 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:03,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:03,003 INFO L85 PathProgramCache]: Analyzing trace with hash -85619334, now seen corresponding path program 42 times [2024-09-13 08:57:03,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:03,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025708935] [2024-09-13 08:57:03,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:03,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:03,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:03,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 08:57:03,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,068 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:03,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:03,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025708935] [2024-09-13 08:57:03,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025708935] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:03,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246748764] [2024-09-13 08:57:03,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:03,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:03,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:03,069 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:03,070 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-13 08:57:03,124 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-13 08:57:03,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:03,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 08:57:03,126 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:03,161 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:03,206 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:03,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1246748764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:03,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:03,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-13 08:57:03,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509943754] [2024-09-13 08:57:03,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:03,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 08:57:03,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:03,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 08:57:03,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-13 08:57:03,207 INFO L87 Difference]: Start difference. First operand 342 states and 395 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:03,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:03,374 INFO L93 Difference]: Finished difference Result 535 states and 612 transitions. [2024-09-13 08:57:03,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-13 08:57:03,374 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-09-13 08:57:03,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:03,378 INFO L225 Difference]: With dead ends: 535 [2024-09-13 08:57:03,378 INFO L226 Difference]: Without dead ends: 349 [2024-09-13 08:57:03,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:57:03,381 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:03,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 217 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:03,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-13 08:57:03,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-13 08:57:03,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-13 08:57:03,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 402 transitions. [2024-09-13 08:57:03,482 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 402 transitions. Word has length 45 [2024-09-13 08:57:03,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:03,483 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 402 transitions. [2024-09-13 08:57:03,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:03,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:03,483 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 402 transitions. [2024-09-13 08:57:03,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:57:03,485 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:03,485 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:03,498 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:03,685 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:03,686 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:03,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:03,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1876412539, now seen corresponding path program 43 times [2024-09-13 08:57:03,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:03,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117340953] [2024-09-13 08:57:03,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:03,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:03,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:03,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:03,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:03,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:03,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:04,008 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117340953] [2024-09-13 08:57:04,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117340953] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:04,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861433732] [2024-09-13 08:57:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:57:04,009 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:04,009 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:04,009 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:04,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-13 08:57:04,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:04,066 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:57:04,067 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:04,200 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:04,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:04,307 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:04,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861433732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:04,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:04,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 36 [2024-09-13 08:57:04,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823942580] [2024-09-13 08:57:04,308 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:04,308 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:57:04,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:04,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:57:04,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:57:04,309 INFO L87 Difference]: Start difference. First operand 349 states and 402 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:04,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:04,939 INFO L93 Difference]: Finished difference Result 419 states and 483 transitions. [2024-09-13 08:57:04,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:57:04,939 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-13 08:57:04,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:04,942 INFO L225 Difference]: With dead ends: 419 [2024-09-13 08:57:04,942 INFO L226 Difference]: Without dead ends: 413 [2024-09-13 08:57:04,944 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:04,944 INFO L434 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:04,945 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 2246 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:57:04,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-09-13 08:57:05,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 363. [2024-09-13 08:57:05,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 306 states have (on average 1.1830065359477124) internal successors, (362), 338 states have internal predecessors, (362), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2024-09-13 08:57:05,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2024-09-13 08:57:05,052 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 46 [2024-09-13 08:57:05,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:05,052 INFO L474 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2024-09-13 08:57:05,052 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:05,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:05,052 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2024-09-13 08:57:05,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:57:05,054 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:05,054 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:05,066 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:05,255 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:05,255 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:05,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:05,255 INFO L85 PathProgramCache]: Analyzing trace with hash -493129823, now seen corresponding path program 44 times [2024-09-13 08:57:05,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:05,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869321534] [2024-09-13 08:57:05,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:05,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:05,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:05,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:05,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:05,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:05,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:05,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:05,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869321534] [2024-09-13 08:57:05,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869321534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:05,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143175636] [2024-09-13 08:57:05,553 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:57:05,553 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:05,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:05,554 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:05,555 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-13 08:57:05,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:57:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:05,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:57:05,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:05,783 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:05,783 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:05,880 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:05,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143175636] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:05,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:05,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-09-13 08:57:05,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981901475] [2024-09-13 08:57:05,881 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:05,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:57:05,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:05,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:57:05,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:57:05,882 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:06,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:06,326 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2024-09-13 08:57:06,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:57:06,326 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-13 08:57:06,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:06,328 INFO L225 Difference]: With dead ends: 369 [2024-09-13 08:57:06,328 INFO L226 Difference]: Without dead ends: 349 [2024-09-13 08:57:06,329 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:06,330 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:06,330 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1707 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:06,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-13 08:57:06,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-13 08:57:06,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2024-09-13 08:57:06,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2024-09-13 08:57:06,417 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 46 [2024-09-13 08:57:06,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:06,417 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2024-09-13 08:57:06,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:06,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:06,417 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2024-09-13 08:57:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:57:06,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:06,419 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:06,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-09-13 08:57:06,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:06,620 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:06,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:06,620 INFO L85 PathProgramCache]: Analyzing trace with hash -573359227, now seen corresponding path program 45 times [2024-09-13 08:57:06,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:06,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68109904] [2024-09-13 08:57:06,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:06,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:06,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:06,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:06,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:06,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:06,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:06,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:06,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:06,894 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:06,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68109904] [2024-09-13 08:57:06,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68109904] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:06,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1505453722] [2024-09-13 08:57:06,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:57:06,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:06,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:06,896 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:06,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-13 08:57:06,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-13 08:57:06,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:06,955 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:57:06,956 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:07,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:07,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:07,230 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:07,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1505453722] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:07,230 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:07,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 36 [2024-09-13 08:57:07,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21853012] [2024-09-13 08:57:07,231 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:07,231 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:57:07,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:07,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:57:07,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:57:07,231 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:07,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:07,622 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2024-09-13 08:57:07,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:57:07,622 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-13 08:57:07,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:07,624 INFO L225 Difference]: With dead ends: 355 [2024-09-13 08:57:07,624 INFO L226 Difference]: Without dead ends: 333 [2024-09-13 08:57:07,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:07,626 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:07,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1301 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:07,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-09-13 08:57:07,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2024-09-13 08:57:07,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.1843971631205674) internal successors, (334), 310 states have internal predecessors, (334), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2024-09-13 08:57:07,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 385 transitions. [2024-09-13 08:57:07,712 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 385 transitions. Word has length 46 [2024-09-13 08:57:07,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:07,712 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 385 transitions. [2024-09-13 08:57:07,712 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:07,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:07,712 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 385 transitions. [2024-09-13 08:57:07,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-13 08:57:07,714 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:07,714 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:07,726 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-13 08:57:07,914 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:07,914 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:07,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:07,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1234099105, now seen corresponding path program 46 times [2024-09-13 08:57:07,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:07,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738132223] [2024-09-13 08:57:07,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:07,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:07,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:07,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:07,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:07,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:08,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:08,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:08,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:08,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738132223] [2024-09-13 08:57:08,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738132223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:08,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028926980] [2024-09-13 08:57:08,163 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:08,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:08,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:08,164 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:08,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-13 08:57:08,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:08,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:08,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-13 08:57:08,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:08,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:08,513 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:08,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028926980] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:08,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:08,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2024-09-13 08:57:08,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362980920] [2024-09-13 08:57:08,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:08,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-13 08:57:08,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:08,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-13 08:57:08,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:57:08,515 INFO L87 Difference]: Start difference. First operand 333 states and 385 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:08,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:08,800 INFO L93 Difference]: Finished difference Result 349 states and 404 transitions. [2024-09-13 08:57:08,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-13 08:57:08,801 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-13 08:57:08,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:08,803 INFO L225 Difference]: With dead ends: 349 [2024-09-13 08:57:08,803 INFO L226 Difference]: Without dead ends: 343 [2024-09-13 08:57:08,805 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:08,805 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:08,805 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 733 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:57:08,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-13 08:57:08,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2024-09-13 08:57:08,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 287 states have (on average 1.1881533101045296) internal successors, (341), 317 states have internal predecessors, (341), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2024-09-13 08:57:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 396 transitions. [2024-09-13 08:57:08,905 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 396 transitions. Word has length 46 [2024-09-13 08:57:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:08,905 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 396 transitions. [2024-09-13 08:57:08,905 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:08,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 396 transitions. [2024-09-13 08:57:08,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 08:57:08,908 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:08,908 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:08,920 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-13 08:57:09,108 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:09,108 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:09,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:09,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1281594894, now seen corresponding path program 47 times [2024-09-13 08:57:09,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:09,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725378165] [2024-09-13 08:57:09,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:09,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:09,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:09,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:09,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:09,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:09,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:09,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:09,408 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:09,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:09,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725378165] [2024-09-13 08:57:09,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1725378165] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:09,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152910530] [2024-09-13 08:57:09,409 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:09,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:09,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:09,410 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:09,410 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-13 08:57:09,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:57:09,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:09,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 08:57:09,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:09,833 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:10,504 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:10,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152910530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:10,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:10,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-13 08:57:10,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398113723] [2024-09-13 08:57:10,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:10,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-13 08:57:10,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:10,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-13 08:57:10,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:57:10,506 INFO L87 Difference]: Start difference. First operand 341 states and 396 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:11,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:11,407 INFO L93 Difference]: Finished difference Result 403 states and 471 transitions. [2024-09-13 08:57:11,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 08:57:11,407 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-13 08:57:11,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:11,410 INFO L225 Difference]: With dead ends: 403 [2024-09-13 08:57:11,410 INFO L226 Difference]: Without dead ends: 390 [2024-09-13 08:57:11,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 08:57:11,413 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:11,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 774 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:57:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-09-13 08:57:11,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 382. [2024-09-13 08:57:11,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 322 states have (on average 1.186335403726708) internal successors, (382), 356 states have internal predecessors, (382), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2024-09-13 08:57:11,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2024-09-13 08:57:11,590 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 47 [2024-09-13 08:57:11,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:11,590 INFO L474 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2024-09-13 08:57:11,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:11,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2024-09-13 08:57:11,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 08:57:11,594 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:11,594 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:11,605 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:11,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-13 08:57:11,794 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:11,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:11,795 INFO L85 PathProgramCache]: Analyzing trace with hash 352103163, now seen corresponding path program 48 times [2024-09-13 08:57:11,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:11,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696840441] [2024-09-13 08:57:11,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:11,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:11,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:11,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:11,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:11,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:11,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:11,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:11,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:12,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696840441] [2024-09-13 08:57:12,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696840441] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:12,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63289006] [2024-09-13 08:57:12,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:12,093 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:12,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:12,094 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:12,095 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-13 08:57:12,152 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:57:12,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:12,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 08:57:12,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:12,513 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:12,513 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:13,155 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:13,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63289006] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:13,156 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:13,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-13 08:57:13,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836566499] [2024-09-13 08:57:13,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:13,156 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-13 08:57:13,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:13,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-13 08:57:13,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:57:13,157 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:14,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:14,051 INFO L93 Difference]: Finished difference Result 396 states and 459 transitions. [2024-09-13 08:57:14,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 08:57:14,051 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-13 08:57:14,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:14,053 INFO L225 Difference]: With dead ends: 396 [2024-09-13 08:57:14,053 INFO L226 Difference]: Without dead ends: 385 [2024-09-13 08:57:14,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-13 08:57:14,056 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:14,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 829 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:14,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-13 08:57:14,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2024-09-13 08:57:14,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 323 states have (on average 1.1857585139318885) internal successors, (383), 357 states have internal predecessors, (383), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-13 08:57:14,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-13 08:57:14,178 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 47 [2024-09-13 08:57:14,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:14,179 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-13 08:57:14,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:14,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:14,179 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-13 08:57:14,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 08:57:14,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:14,182 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:14,194 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-13 08:57:14,382 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-13 08:57:14,382 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:14,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:14,383 INFO L85 PathProgramCache]: Analyzing trace with hash -804302246, now seen corresponding path program 49 times [2024-09-13 08:57:14,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:14,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206936394] [2024-09-13 08:57:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:14,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:14,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:14,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:14,409 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:14,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:14,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:14,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:14,456 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:14,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206936394] [2024-09-13 08:57:14,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206936394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:14,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630670063] [2024-09-13 08:57:14,456 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:57:14,456 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:14,456 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:14,457 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:14,458 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-13 08:57:14,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:14,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:57:14,519 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:14,568 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:14,607 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:14,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [630670063] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:14,607 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:14,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-13 08:57:14,608 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395162465] [2024-09-13 08:57:14,608 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:14,608 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:57:14,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:14,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:57:14,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:57:14,608 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:14,807 INFO L93 Difference]: Finished difference Result 654 states and 759 transitions. [2024-09-13 08:57:14,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 08:57:14,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-09-13 08:57:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:14,812 INFO L225 Difference]: With dead ends: 654 [2024-09-13 08:57:14,812 INFO L226 Difference]: Without dead ends: 441 [2024-09-13 08:57:14,816 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:57:14,816 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:14,816 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:14,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-09-13 08:57:14,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2024-09-13 08:57:14,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 381 states have (on average 1.1811023622047243) internal successors, (450), 415 states have internal predecessors, (450), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-13 08:57:14,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 510 transitions. [2024-09-13 08:57:14,959 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 510 transitions. Word has length 47 [2024-09-13 08:57:14,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:14,959 INFO L474 AbstractCegarLoop]: Abstraction has 441 states and 510 transitions. [2024-09-13 08:57:14,959 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:14,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:14,959 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 510 transitions. [2024-09-13 08:57:14,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-13 08:57:14,961 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:14,961 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:14,973 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-13 08:57:15,162 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-13 08:57:15,162 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:15,162 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:15,162 INFO L85 PathProgramCache]: Analyzing trace with hash 731392309, now seen corresponding path program 50 times [2024-09-13 08:57:15,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:15,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628922612] [2024-09-13 08:57:15,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:15,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:15,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:15,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:15,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:15,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:15,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:15,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:15,241 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:15,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628922612] [2024-09-13 08:57:15,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628922612] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:15,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604259634] [2024-09-13 08:57:15,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:57:15,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:15,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:15,243 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:15,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-13 08:57:15,304 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:57:15,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:15,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-13 08:57:15,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:15,357 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:15,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-13 08:57:15,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604259634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:15,398 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:15,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-13 08:57:15,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108825542] [2024-09-13 08:57:15,398 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:15,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-13 08:57:15,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:15,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-13 08:57:15,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-13 08:57:15,399 INFO L87 Difference]: Start difference. First operand 441 states and 510 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:15,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:15,624 INFO L93 Difference]: Finished difference Result 529 states and 623 transitions. [2024-09-13 08:57:15,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-13 08:57:15,625 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-09-13 08:57:15,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:15,627 INFO L225 Difference]: With dead ends: 529 [2024-09-13 08:57:15,627 INFO L226 Difference]: Without dead ends: 499 [2024-09-13 08:57:15,630 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-13 08:57:15,631 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:15,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:15,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-13 08:57:15,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-13 08:57:15,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-13 08:57:15,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 577 transitions. [2024-09-13 08:57:15,789 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 577 transitions. Word has length 47 [2024-09-13 08:57:15,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:15,789 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 577 transitions. [2024-09-13 08:57:15,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:15,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:15,790 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 577 transitions. [2024-09-13 08:57:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:15,793 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:15,793 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:15,804 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:15,993 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-13 08:57:15,993 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:15,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:15,993 INFO L85 PathProgramCache]: Analyzing trace with hash -917084868, now seen corresponding path program 51 times [2024-09-13 08:57:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327563849] [2024-09-13 08:57:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:15,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:16,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:16,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:16,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:16,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:16,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:16,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:16,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327563849] [2024-09-13 08:57:16,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327563849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089227258] [2024-09-13 08:57:16,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:57:16,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:16,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:16,367 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:16,368 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-13 08:57:16,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:57:16,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:16,429 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:57:16,430 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:16,562 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:16,562 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:16,660 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:16,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089227258] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:16,660 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:16,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 38 [2024-09-13 08:57:16,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927963709] [2024-09-13 08:57:16,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:16,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:16,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:16,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:16,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:16,662 INFO L87 Difference]: Start difference. First operand 499 states and 577 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:17,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:17,327 INFO L93 Difference]: Finished difference Result 583 states and 674 transitions. [2024-09-13 08:57:17,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:57:17,328 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-13 08:57:17,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:17,332 INFO L225 Difference]: With dead ends: 583 [2024-09-13 08:57:17,332 INFO L226 Difference]: Without dead ends: 577 [2024-09-13 08:57:17,334 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:57:17,335 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:17,335 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2645 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:57:17,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-09-13 08:57:17,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 513. [2024-09-13 08:57:17,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 450 states have (on average 1.1777777777777778) internal successors, (530), 486 states have internal predecessors, (530), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2024-09-13 08:57:17,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 594 transitions. [2024-09-13 08:57:17,494 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 594 transitions. Word has length 48 [2024-09-13 08:57:17,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:17,494 INFO L474 AbstractCegarLoop]: Abstraction has 513 states and 594 transitions. [2024-09-13 08:57:17,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:17,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:17,495 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 594 transitions. [2024-09-13 08:57:17,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:17,497 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:17,497 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:17,508 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:17,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:17,698 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:17,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:17,698 INFO L85 PathProgramCache]: Analyzing trace with hash 442135356, now seen corresponding path program 52 times [2024-09-13 08:57:17,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:17,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725922602] [2024-09-13 08:57:17,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:17,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:17,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:17,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:17,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:17,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:17,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:17,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:17,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:18,030 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:18,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725922602] [2024-09-13 08:57:18,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725922602] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:18,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827046667] [2024-09-13 08:57:18,030 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:18,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:18,031 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:18,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-13 08:57:18,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:18,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:18,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:57:18,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:18,263 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:18,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:18,366 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:18,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827046667] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:18,366 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:18,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 38 [2024-09-13 08:57:18,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284621444] [2024-09-13 08:57:18,366 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:18,366 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:18,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:18,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:18,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1319, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:18,367 INFO L87 Difference]: Start difference. First operand 513 states and 594 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:18,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:18,907 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2024-09-13 08:57:18,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:57:18,910 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-13 08:57:18,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:18,913 INFO L225 Difference]: With dead ends: 519 [2024-09-13 08:57:18,913 INFO L226 Difference]: Without dead ends: 499 [2024-09-13 08:57:18,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:57:18,915 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:18,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1936 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:18,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-13 08:57:19,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-13 08:57:19,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-13 08:57:19,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2024-09-13 08:57:19,061 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 48 [2024-09-13 08:57:19,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:19,061 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2024-09-13 08:57:19,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:19,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:19,061 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2024-09-13 08:57:19,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:19,064 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:19,064 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:19,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-13 08:57:19,264 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:19,265 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:19,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:19,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2109377852, now seen corresponding path program 53 times [2024-09-13 08:57:19,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:19,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253652714] [2024-09-13 08:57:19,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:19,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:19,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:19,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:19,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:19,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:19,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:19,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:19,649 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:19,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:19,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253652714] [2024-09-13 08:57:19,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253652714] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:19,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624386224] [2024-09-13 08:57:19,650 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:19,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:19,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:19,651 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:19,652 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-13 08:57:19,728 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-13 08:57:19,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:19,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-13 08:57:19,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:19,976 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:19,976 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:20,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624386224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:20,049 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:20,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 38 [2024-09-13 08:57:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522298244] [2024-09-13 08:57:20,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:20,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:20,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:20,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:20,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:20,051 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:20,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:20,559 INFO L93 Difference]: Finished difference Result 505 states and 583 transitions. [2024-09-13 08:57:20,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:57:20,560 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-13 08:57:20,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:20,562 INFO L225 Difference]: With dead ends: 505 [2024-09-13 08:57:20,562 INFO L226 Difference]: Without dead ends: 483 [2024-09-13 08:57:20,565 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:57:20,565 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:20,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1441 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:20,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-09-13 08:57:20,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2024-09-13 08:57:20,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 426 states have (on average 1.1784037558685445) internal successors, (502), 458 states have internal predecessors, (502), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2024-09-13 08:57:20,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 560 transitions. [2024-09-13 08:57:20,737 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 560 transitions. Word has length 48 [2024-09-13 08:57:20,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:20,737 INFO L474 AbstractCegarLoop]: Abstraction has 483 states and 560 transitions. [2024-09-13 08:57:20,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:20,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:20,738 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 560 transitions. [2024-09-13 08:57:20,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:20,740 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:20,740 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:20,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2024-09-13 08:57:20,944 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:20,945 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:20,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:20,945 INFO L85 PathProgramCache]: Analyzing trace with hash -1301335053, now seen corresponding path program 54 times [2024-09-13 08:57:20,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:20,945 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333998062] [2024-09-13 08:57:20,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:20,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:20,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:20,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:20,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:20,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:20,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:21,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-13 08:57:21,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:21,182 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-13 08:57:21,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:21,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333998062] [2024-09-13 08:57:21,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333998062] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:21,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105369512] [2024-09-13 08:57:21,183 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:21,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:21,183 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:21,184 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:21,184 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-13 08:57:21,244 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:57:21,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:21,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:57:21,246 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:21,430 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 08:57:21,430 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 08:57:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105369512] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:21,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:21,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-13 08:57:21,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865154271] [2024-09-13 08:57:21,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:21,778 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:21,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:21,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:21,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:21,779 INFO L87 Difference]: Start difference. First operand 483 states and 560 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:22,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:22,357 INFO L93 Difference]: Finished difference Result 539 states and 630 transitions. [2024-09-13 08:57:22,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 08:57:22,358 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-13 08:57:22,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:22,364 INFO L225 Difference]: With dead ends: 539 [2024-09-13 08:57:22,364 INFO L226 Difference]: Without dead ends: 523 [2024-09-13 08:57:22,366 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:57:22,367 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:22,367 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 538 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:22,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-09-13 08:57:22,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2024-09-13 08:57:22,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 441 states have (on average 1.1700680272108843) internal successors, (516), 487 states have internal predecessors, (516), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-13 08:57:22,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 602 transitions. [2024-09-13 08:57:22,533 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 602 transitions. Word has length 48 [2024-09-13 08:57:22,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:22,533 INFO L474 AbstractCegarLoop]: Abstraction has 519 states and 602 transitions. [2024-09-13 08:57:22,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:22,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:22,534 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 602 transitions. [2024-09-13 08:57:22,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:22,536 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:22,537 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:22,550 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-13 08:57:22,737 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:22,737 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:22,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:22,737 INFO L85 PathProgramCache]: Analyzing trace with hash 948849468, now seen corresponding path program 55 times [2024-09-13 08:57:22,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:22,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961006774] [2024-09-13 08:57:22,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:22,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:22,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:22,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:22,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:22,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:22,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:22,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:23,042 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:23,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961006774] [2024-09-13 08:57:23,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961006774] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:23,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736695567] [2024-09-13 08:57:23,043 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:57:23,043 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:23,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:23,044 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:23,047 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-13 08:57:23,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:23,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:57:23,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:23,347 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:23,442 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:23,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736695567] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:23,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:23,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2024-09-13 08:57:23,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108722627] [2024-09-13 08:57:23,443 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:23,443 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:23,443 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:23,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:23,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:23,444 INFO L87 Difference]: Start difference. First operand 519 states and 602 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:23,855 INFO L93 Difference]: Finished difference Result 535 states and 622 transitions. [2024-09-13 08:57:23,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:57:23,855 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-13 08:57:23,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:23,859 INFO L225 Difference]: With dead ends: 535 [2024-09-13 08:57:23,859 INFO L226 Difference]: Without dead ends: 519 [2024-09-13 08:57:23,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:57:23,862 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:23,862 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 965 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:23,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-09-13 08:57:24,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 515. [2024-09-13 08:57:24,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.173913043478261) internal successors, (513), 483 states have internal predecessors, (513), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-13 08:57:24,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 599 transitions. [2024-09-13 08:57:24,028 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 599 transitions. Word has length 48 [2024-09-13 08:57:24,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:24,028 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 599 transitions. [2024-09-13 08:57:24,028 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:24,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:24,029 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 599 transitions. [2024-09-13 08:57:24,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-13 08:57:24,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:24,031 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:24,043 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-13 08:57:24,231 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:24,232 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:24,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:24,232 INFO L85 PathProgramCache]: Analyzing trace with hash -2036774893, now seen corresponding path program 56 times [2024-09-13 08:57:24,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:24,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393053189] [2024-09-13 08:57:24,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:24,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:24,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:24,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:24,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:24,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:24,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:24,452 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-13 08:57:24,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393053189] [2024-09-13 08:57:24,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393053189] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:24,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932325848] [2024-09-13 08:57:24,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:57:24,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:24,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:24,454 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:24,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-13 08:57:24,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:57:24,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:24,516 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-13 08:57:24,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:24,697 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 08:57:24,698 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-13 08:57:25,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1932325848] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:25,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:25,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-13 08:57:25,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795949964] [2024-09-13 08:57:25,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:25,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-13 08:57:25,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:25,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-13 08:57:25,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-13 08:57:25,028 INFO L87 Difference]: Start difference. First operand 515 states and 599 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:25,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:25,576 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2024-09-13 08:57:25,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-13 08:57:25,576 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-13 08:57:25,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:25,579 INFO L225 Difference]: With dead ends: 527 [2024-09-13 08:57:25,579 INFO L226 Difference]: Without dead ends: 505 [2024-09-13 08:57:25,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:57:25,581 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:25,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 596 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:25,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-09-13 08:57:25,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2024-09-13 08:57:25,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 425 states have (on average 1.1741176470588235) internal successors, (499), 471 states have internal predecessors, (499), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2024-09-13 08:57:25,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 579 transitions. [2024-09-13 08:57:25,732 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 579 transitions. Word has length 48 [2024-09-13 08:57:25,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:25,732 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 579 transitions. [2024-09-13 08:57:25,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:25,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:25,733 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 579 transitions. [2024-09-13 08:57:25,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:57:25,735 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:25,735 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:25,750 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-13 08:57:25,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-09-13 08:57:25,936 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:25,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:25,936 INFO L85 PathProgramCache]: Analyzing trace with hash -1607208165, now seen corresponding path program 57 times [2024-09-13 08:57:25,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:25,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299102656] [2024-09-13 08:57:25,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:25,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:25,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:25,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:25,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:25,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:26,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:26,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:26,385 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:26,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299102656] [2024-09-13 08:57:26,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299102656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:26,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101563626] [2024-09-13 08:57:26,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:57:26,386 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:26,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:26,388 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:26,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-13 08:57:26,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 08:57:26,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:26,470 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 08:57:26,472 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:26,985 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:26,985 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:27,761 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:27,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101563626] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:27,761 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:27,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-13 08:57:27,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174215965] [2024-09-13 08:57:27,761 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:27,762 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-13 08:57:27,762 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:27,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-13 08:57:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-13 08:57:27,762 INFO L87 Difference]: Start difference. First operand 503 states and 579 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:29,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:29,016 INFO L93 Difference]: Finished difference Result 585 states and 678 transitions. [2024-09-13 08:57:29,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 08:57:29,016 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-13 08:57:29,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:29,022 INFO L225 Difference]: With dead ends: 585 [2024-09-13 08:57:29,022 INFO L226 Difference]: Without dead ends: 572 [2024-09-13 08:57:29,025 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-13 08:57:29,025 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:29,025 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 899 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:29,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-13 08:57:29,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2024-09-13 08:57:29,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 529 states have internal predecessors, (559), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2024-09-13 08:57:29,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 651 transitions. [2024-09-13 08:57:29,208 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 651 transitions. Word has length 49 [2024-09-13 08:57:29,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:29,208 INFO L474 AbstractCegarLoop]: Abstraction has 564 states and 651 transitions. [2024-09-13 08:57:29,208 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:29,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:29,208 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 651 transitions. [2024-09-13 08:57:29,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:57:29,211 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:29,211 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:29,223 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2024-09-13 08:57:29,412 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:29,412 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:29,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:29,412 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791346, now seen corresponding path program 58 times [2024-09-13 08:57:29,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:29,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417337799] [2024-09-13 08:57:29,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:29,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:29,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:29,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:29,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:29,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:29,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:29,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:29,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:29,743 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:29,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417337799] [2024-09-13 08:57:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417337799] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1059426356] [2024-09-13 08:57:29,743 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:29,743 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:29,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:29,744 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:29,745 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-13 08:57:29,807 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:29,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:29,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 08:57:29,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:30,254 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:30,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:31,023 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:31,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1059426356] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:31,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:31,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-13 08:57:31,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429552208] [2024-09-13 08:57:31,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:31,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-13 08:57:31,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:31,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-13 08:57:31,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-13 08:57:31,025 INFO L87 Difference]: Start difference. First operand 564 states and 651 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:32,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:32,281 INFO L93 Difference]: Finished difference Result 578 states and 665 transitions. [2024-09-13 08:57:32,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-13 08:57:32,282 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-13 08:57:32,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:32,284 INFO L225 Difference]: With dead ends: 578 [2024-09-13 08:57:32,284 INFO L226 Difference]: Without dead ends: 567 [2024-09-13 08:57:32,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-13 08:57:32,288 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:32,288 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1147 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:32,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-13 08:57:32,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2024-09-13 08:57:32,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 478 states have (on average 1.1715481171548117) internal successors, (560), 530 states have internal predecessors, (560), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-13 08:57:32,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 648 transitions. [2024-09-13 08:57:32,470 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 648 transitions. Word has length 49 [2024-09-13 08:57:32,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:32,471 INFO L474 AbstractCegarLoop]: Abstraction has 565 states and 648 transitions. [2024-09-13 08:57:32,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:32,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:32,471 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 648 transitions. [2024-09-13 08:57:32,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:57:32,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:32,474 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:32,485 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-13 08:57:32,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-13 08:57:32,675 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:32,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:32,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1028676879, now seen corresponding path program 59 times [2024-09-13 08:57:32,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:32,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211773075] [2024-09-13 08:57:32,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:32,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:32,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:32,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:32,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:32,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:32,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:32,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:32,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:32,758 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:32,759 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211773075] [2024-09-13 08:57:32,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [211773075] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:32,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306644276] [2024-09-13 08:57:32,759 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:32,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:32,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:32,760 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:32,761 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-13 08:57:32,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:57:32,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:32,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 08:57:32,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:32,894 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:32,946 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:32,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306644276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:32,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:32,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-13 08:57:32,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269426083] [2024-09-13 08:57:32,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:32,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:57:32,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:32,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:57:32,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:57:32,947 INFO L87 Difference]: Start difference. First operand 565 states and 648 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:33,225 INFO L93 Difference]: Finished difference Result 592 states and 681 transitions. [2024-09-13 08:57:33,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:57:33,226 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-09-13 08:57:33,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:33,228 INFO L225 Difference]: With dead ends: 592 [2024-09-13 08:57:33,228 INFO L226 Difference]: Without dead ends: 568 [2024-09-13 08:57:33,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:57:33,232 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:33,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 232 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:33,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-13 08:57:33,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2024-09-13 08:57:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 477 states have (on average 1.1635220125786163) internal successors, (555), 525 states have internal predecessors, (555), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-13 08:57:33,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 635 transitions. [2024-09-13 08:57:33,413 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 635 transitions. Word has length 49 [2024-09-13 08:57:33,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:33,413 INFO L474 AbstractCegarLoop]: Abstraction has 558 states and 635 transitions. [2024-09-13 08:57:33,413 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:33,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:33,413 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 635 transitions. [2024-09-13 08:57:33,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-13 08:57:33,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:33,416 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:33,428 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:33,616 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-13 08:57:33,617 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:33,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash -853281446, now seen corresponding path program 60 times [2024-09-13 08:57:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:33,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524257283] [2024-09-13 08:57:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:33,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:33,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:33,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:33,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:33,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-13 08:57:33,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:33,700 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:33,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524257283] [2024-09-13 08:57:33,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524257283] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:33,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427622882] [2024-09-13 08:57:33,701 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:33,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:33,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:33,702 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:33,703 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-13 08:57:33,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:57:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:33,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-13 08:57:33,772 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:33,819 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:33,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:33,869 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:33,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427622882] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:33,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:33,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-13 08:57:33,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140147208] [2024-09-13 08:57:33,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:33,870 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-13 08:57:33,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:33,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-13 08:57:33,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-13 08:57:33,870 INFO L87 Difference]: Start difference. First operand 558 states and 635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:34,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:34,157 INFO L93 Difference]: Finished difference Result 861 states and 969 transitions. [2024-09-13 08:57:34,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-13 08:57:34,158 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-09-13 08:57:34,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:34,166 INFO L225 Difference]: With dead ends: 861 [2024-09-13 08:57:34,166 INFO L226 Difference]: Without dead ends: 567 [2024-09-13 08:57:34,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-13 08:57:34,170 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:34,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:34,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-13 08:57:34,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-13 08:57:34,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-13 08:57:34,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 644 transitions. [2024-09-13 08:57:34,360 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 644 transitions. Word has length 49 [2024-09-13 08:57:34,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:34,360 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 644 transitions. [2024-09-13 08:57:34,360 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:34,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:34,360 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 644 transitions. [2024-09-13 08:57:34,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:57:34,363 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:34,363 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:34,375 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-13 08:57:34,563 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-13 08:57:34,564 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:34,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:34,564 INFO L85 PathProgramCache]: Analyzing trace with hash 794575845, now seen corresponding path program 61 times [2024-09-13 08:57:34,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:34,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876319685] [2024-09-13 08:57:34,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:34,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:34,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:34,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:34,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:34,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:34,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:34,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:34,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:34,967 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:34,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876319685] [2024-09-13 08:57:34,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1876319685] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:34,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264043107] [2024-09-13 08:57:34,967 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:57:34,967 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:34,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:34,968 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:34,969 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-13 08:57:35,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:35,037 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:57:35,038 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:35,176 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:35,176 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:35,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264043107] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:35,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:35,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 40 [2024-09-13 08:57:35,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968701209] [2024-09-13 08:57:35,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:35,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:57:35,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:57:35,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:57:35,298 INFO L87 Difference]: Start difference. First operand 567 states and 644 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:36,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:36,083 INFO L93 Difference]: Finished difference Result 657 states and 747 transitions. [2024-09-13 08:57:36,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:57:36,083 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-13 08:57:36,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:36,088 INFO L225 Difference]: With dead ends: 657 [2024-09-13 08:57:36,088 INFO L226 Difference]: Without dead ends: 651 [2024-09-13 08:57:36,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1957, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:57:36,092 INFO L434 NwaCegarLoop]: 91 mSDtfsCounter, 97 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:36,092 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 3026 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-09-13 08:57:36,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 581. [2024-09-13 08:57:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 497 states have (on average 1.1609657947686116) internal successors, (577), 547 states have internal predecessors, (577), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2024-09-13 08:57:36,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 661 transitions. [2024-09-13 08:57:36,348 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 661 transitions. Word has length 50 [2024-09-13 08:57:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:36,349 INFO L474 AbstractCegarLoop]: Abstraction has 581 states and 661 transitions. [2024-09-13 08:57:36,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:36,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 661 transitions. [2024-09-13 08:57:36,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:57:36,354 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:36,355 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:36,367 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:36,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:36,556 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:36,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:36,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1446674175, now seen corresponding path program 62 times [2024-09-13 08:57:36,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:36,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659714438] [2024-09-13 08:57:36,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:36,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:36,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:36,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:36,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:36,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:36,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:36,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:36,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:37,083 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:37,083 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659714438] [2024-09-13 08:57:37,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659714438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:37,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906783126] [2024-09-13 08:57:37,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:57:37,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:37,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:37,084 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:37,085 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-13 08:57:37,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:57:37,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:37,153 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:57:37,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:37,336 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:37,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:37,440 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:37,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906783126] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:37,440 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:37,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 40 [2024-09-13 08:57:37,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840907215] [2024-09-13 08:57:37,440 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:37,440 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:57:37,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:37,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:57:37,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:57:37,441 INFO L87 Difference]: Start difference. First operand 581 states and 661 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:38,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:38,162 INFO L93 Difference]: Finished difference Result 587 states and 666 transitions. [2024-09-13 08:57:38,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:57:38,162 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-13 08:57:38,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:38,165 INFO L225 Difference]: With dead ends: 587 [2024-09-13 08:57:38,165 INFO L226 Difference]: Without dead ends: 567 [2024-09-13 08:57:38,169 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:57:38,169 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:38,169 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2521 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:57:38,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-13 08:57:38,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-13 08:57:38,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2024-09-13 08:57:38,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 645 transitions. [2024-09-13 08:57:38,381 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 645 transitions. Word has length 50 [2024-09-13 08:57:38,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:38,381 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 645 transitions. [2024-09-13 08:57:38,381 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:38,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:38,381 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 645 transitions. [2024-09-13 08:57:38,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:57:38,384 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:38,384 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:38,396 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-09-13 08:57:38,584 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:38,584 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:38,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:38,585 INFO L85 PathProgramCache]: Analyzing trace with hash -10438683, now seen corresponding path program 63 times [2024-09-13 08:57:38,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:38,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27505930] [2024-09-13 08:57:38,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:38,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:38,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:38,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:38,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:38,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:38,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:38,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:38,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27505930] [2024-09-13 08:57:38,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27505930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:38,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451072329] [2024-09-13 08:57:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:57:38,929 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:38,930 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:38,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-13 08:57:38,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:57:38,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:39,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:57:39,002 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:39,227 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:39,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:39,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451072329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:39,353 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:39,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 40 [2024-09-13 08:57:39,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161786639] [2024-09-13 08:57:39,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:39,354 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:57:39,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:39,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:57:39,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:57:39,354 INFO L87 Difference]: Start difference. First operand 567 states and 645 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:39,966 INFO L93 Difference]: Finished difference Result 573 states and 650 transitions. [2024-09-13 08:57:39,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:57:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-13 08:57:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:39,969 INFO L225 Difference]: With dead ends: 573 [2024-09-13 08:57:39,969 INFO L226 Difference]: Without dead ends: 551 [2024-09-13 08:57:39,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:57:39,974 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:39,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1933 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:57:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-09-13 08:57:40,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2024-09-13 08:57:40,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 473 states have (on average 1.160676532769556) internal successors, (549), 519 states have internal predecessors, (549), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2024-09-13 08:57:40,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 627 transitions. [2024-09-13 08:57:40,159 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 627 transitions. Word has length 50 [2024-09-13 08:57:40,160 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:40,160 INFO L474 AbstractCegarLoop]: Abstraction has 551 states and 627 transitions. [2024-09-13 08:57:40,160 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:40,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:40,160 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 627 transitions. [2024-09-13 08:57:40,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:57:40,162 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:40,162 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:40,174 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-13 08:57:40,363 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-09-13 08:57:40,363 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:40,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:40,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1691124479, now seen corresponding path program 64 times [2024-09-13 08:57:40,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:40,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266630277] [2024-09-13 08:57:40,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:40,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:40,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:40,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:40,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:40,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:40,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:40,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:40,678 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:40,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266630277] [2024-09-13 08:57:40,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266630277] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:40,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991654262] [2024-09-13 08:57:40,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:40,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:40,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:40,680 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:40,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-13 08:57:40,763 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:40,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:40,765 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:57:40,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:41,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:41,138 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:57:41,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [991654262] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:41,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:41,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 40 [2024-09-13 08:57:41,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198674871] [2024-09-13 08:57:41,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:41,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:57:41,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:41,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:57:41,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:57:41,140 INFO L87 Difference]: Start difference. First operand 551 states and 627 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:41,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:41,639 INFO L93 Difference]: Finished difference Result 557 states and 632 transitions. [2024-09-13 08:57:41,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:57:41,640 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-13 08:57:41,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:41,642 INFO L225 Difference]: With dead ends: 557 [2024-09-13 08:57:41,642 INFO L226 Difference]: Without dead ends: 533 [2024-09-13 08:57:41,645 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:57:41,645 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:41,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1387 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:41,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-13 08:57:41,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2024-09-13 08:57:41,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 458 states have (on average 1.1615720524017468) internal successors, (532), 502 states have internal predecessors, (532), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2024-09-13 08:57:41,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 607 transitions. [2024-09-13 08:57:41,828 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 607 transitions. Word has length 50 [2024-09-13 08:57:41,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:41,828 INFO L474 AbstractCegarLoop]: Abstraction has 533 states and 607 transitions. [2024-09-13 08:57:41,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:41,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:41,828 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 607 transitions. [2024-09-13 08:57:41,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-13 08:57:41,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:41,831 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:41,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-09-13 08:57:42,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:42,031 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:42,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:42,031 INFO L85 PathProgramCache]: Analyzing trace with hash -695186459, now seen corresponding path program 65 times [2024-09-13 08:57:42,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:42,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551054496] [2024-09-13 08:57:42,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:42,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:42,112 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:42,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:42,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:42,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:42,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:42,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:57:42,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:42,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551054496] [2024-09-13 08:57:42,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551054496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:42,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084811725] [2024-09-13 08:57:42,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:42,318 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:42,319 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:42,319 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:42,321 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-13 08:57:42,388 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:57:42,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:42,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-13 08:57:42,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:42,648 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:57:42,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:42,740 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:57:42,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084811725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:42,740 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:42,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-09-13 08:57:42,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830084726] [2024-09-13 08:57:42,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:42,741 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-13 08:57:42,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-13 08:57:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2024-09-13 08:57:42,741 INFO L87 Difference]: Start difference. First operand 533 states and 607 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:43,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:43,180 INFO L93 Difference]: Finished difference Result 549 states and 626 transitions. [2024-09-13 08:57:43,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-13 08:57:43,183 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-13 08:57:43,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:43,188 INFO L225 Difference]: With dead ends: 549 [2024-09-13 08:57:43,188 INFO L226 Difference]: Without dead ends: 543 [2024-09-13 08:57:43,190 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:57:43,190 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:43,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 836 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:57:43,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-09-13 08:57:43,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2024-09-13 08:57:43,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 463 states have (on average 1.16414686825054) internal successors, (539), 509 states have internal predecessors, (539), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2024-09-13 08:57:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 618 transitions. [2024-09-13 08:57:43,379 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 618 transitions. Word has length 50 [2024-09-13 08:57:43,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:43,380 INFO L474 AbstractCegarLoop]: Abstraction has 541 states and 618 transitions. [2024-09-13 08:57:43,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:43,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:43,380 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 618 transitions. [2024-09-13 08:57:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:57:43,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:43,383 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:43,395 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:43,583 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:43,583 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:43,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:43,584 INFO L85 PathProgramCache]: Analyzing trace with hash -85333614, now seen corresponding path program 66 times [2024-09-13 08:57:43,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:43,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240060370] [2024-09-13 08:57:43,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:43,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:43,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:43,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:43,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:43,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:43,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:43,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:43,972 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:43,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240060370] [2024-09-13 08:57:43,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240060370] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:43,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49265790] [2024-09-13 08:57:43,973 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:43,973 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:43,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:43,974 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:43,974 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-13 08:57:44,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-13 08:57:44,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:44,044 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:57:44,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:44,555 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:44,555 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:45,478 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:45,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49265790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:45,479 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:45,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-13 08:57:45,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43972770] [2024-09-13 08:57:45,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:45,479 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-13 08:57:45,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:45,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-13 08:57:45,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 08:57:45,480 INFO L87 Difference]: Start difference. First operand 541 states and 618 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:46,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:46,963 INFO L93 Difference]: Finished difference Result 625 states and 719 transitions. [2024-09-13 08:57:46,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 08:57:46,964 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-13 08:57:46,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:46,970 INFO L225 Difference]: With dead ends: 625 [2024-09-13 08:57:46,970 INFO L226 Difference]: Without dead ends: 612 [2024-09-13 08:57:46,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-13 08:57:46,974 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:46,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 914 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:46,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-09-13 08:57:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2024-09-13 08:57:47,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 517 states have (on average 1.1624758220502902) internal successors, (601), 569 states have internal predecessors, (601), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2024-09-13 08:57:47,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 692 transitions. [2024-09-13 08:57:47,210 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 692 transitions. Word has length 51 [2024-09-13 08:57:47,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:47,210 INFO L474 AbstractCegarLoop]: Abstraction has 604 states and 692 transitions. [2024-09-13 08:57:47,210 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:47,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:47,211 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 692 transitions. [2024-09-13 08:57:47,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:57:47,214 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:47,214 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:47,226 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-13 08:57:47,414 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-09-13 08:57:47,415 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:47,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:47,415 INFO L85 PathProgramCache]: Analyzing trace with hash -2059531173, now seen corresponding path program 67 times [2024-09-13 08:57:47,415 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:47,415 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540580635] [2024-09-13 08:57:47,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:47,415 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:47,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:47,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:47,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:47,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:47,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:57:47,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:47,861 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:47,861 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:47,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540580635] [2024-09-13 08:57:47,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540580635] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:47,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667724691] [2024-09-13 08:57:47,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:57:47,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:47,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:47,862 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:47,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-13 08:57:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:47,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 08:57:47,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:48,453 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:48,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:57:49,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667724691] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:49,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:49,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-13 08:57:49,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926305909] [2024-09-13 08:57:49,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:49,318 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-13 08:57:49,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:49,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-13 08:57:49,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-13 08:57:49,320 INFO L87 Difference]: Start difference. First operand 604 states and 692 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:50,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:50,941 INFO L93 Difference]: Finished difference Result 618 states and 706 transitions. [2024-09-13 08:57:50,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-13 08:57:50,941 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-13 08:57:50,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:50,945 INFO L225 Difference]: With dead ends: 618 [2024-09-13 08:57:50,945 INFO L226 Difference]: Without dead ends: 607 [2024-09-13 08:57:50,949 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-13 08:57:50,950 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:50,950 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1042 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:50,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-09-13 08:57:51,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2024-09-13 08:57:51,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 518 states have (on average 1.162162162162162) internal successors, (602), 570 states have internal predecessors, (602), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-13 08:57:51,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 689 transitions. [2024-09-13 08:57:51,181 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 689 transitions. Word has length 51 [2024-09-13 08:57:51,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:51,182 INFO L474 AbstractCegarLoop]: Abstraction has 605 states and 689 transitions. [2024-09-13 08:57:51,182 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:57:51,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:51,182 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 689 transitions. [2024-09-13 08:57:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:57:51,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:51,186 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:51,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-13 08:57:51,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-13 08:57:51,386 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:51,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:51,387 INFO L85 PathProgramCache]: Analyzing trace with hash -89209158, now seen corresponding path program 68 times [2024-09-13 08:57:51,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:51,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941237857] [2024-09-13 08:57:51,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:51,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:51,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:51,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:51,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:51,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:51,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:51,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:57:51,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:51,507 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:51,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:51,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941237857] [2024-09-13 08:57:51,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941237857] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:51,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699567952] [2024-09-13 08:57:51,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:57:51,507 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:51,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:51,508 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:51,509 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-13 08:57:51,581 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:57:51,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:51,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:57:51,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:51,645 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:51,645 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:51,695 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:51,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699567952] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:51,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:51,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-13 08:57:51,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168273949] [2024-09-13 08:57:51,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:51,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:57:51,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:51,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:57:51,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:57:51,697 INFO L87 Difference]: Start difference. First operand 605 states and 689 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:52,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:52,083 INFO L93 Difference]: Finished difference Result 1012 states and 1152 transitions. [2024-09-13 08:57:52,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 08:57:52,084 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-09-13 08:57:52,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:52,095 INFO L225 Difference]: With dead ends: 1012 [2024-09-13 08:57:52,095 INFO L226 Difference]: Without dead ends: 687 [2024-09-13 08:57:52,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:57:52,099 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:52,099 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 236 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:52,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-09-13 08:57:52,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2024-09-13 08:57:52,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 600 states have (on average 1.1583333333333334) internal successors, (695), 652 states have internal predecessors, (695), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-13 08:57:52,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 782 transitions. [2024-09-13 08:57:52,349 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 782 transitions. Word has length 51 [2024-09-13 08:57:52,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:52,349 INFO L474 AbstractCegarLoop]: Abstraction has 687 states and 782 transitions. [2024-09-13 08:57:52,349 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:52,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:52,349 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 782 transitions. [2024-09-13 08:57:52,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-13 08:57:52,353 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:52,353 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:52,365 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2024-09-13 08:57:52,553 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-13 08:57:52,553 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:52,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:52,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1053081969, now seen corresponding path program 69 times [2024-09-13 08:57:52,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:52,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729985361] [2024-09-13 08:57:52,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:52,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:52,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:52,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:52,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:52,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:52,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:52,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:57:52,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:52,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729985361] [2024-09-13 08:57:52,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729985361] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:52,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825696156] [2024-09-13 08:57:52,666 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:57:52,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:52,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:52,667 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:52,667 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-13 08:57:52,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:57:52,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:52,742 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 08:57:52,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:52,805 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:52,805 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:52,856 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-13 08:57:52,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825696156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:52,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:52,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-13 08:57:52,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285190234] [2024-09-13 08:57:52,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:52,857 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-13 08:57:52,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:52,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-13 08:57:52,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-13 08:57:52,857 INFO L87 Difference]: Start difference. First operand 687 states and 782 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:53,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:53,256 INFO L93 Difference]: Finished difference Result 805 states and 931 transitions. [2024-09-13 08:57:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 08:57:53,256 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-09-13 08:57:53,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:53,260 INFO L225 Difference]: With dead ends: 805 [2024-09-13 08:57:53,260 INFO L226 Difference]: Without dead ends: 769 [2024-09-13 08:57:53,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-13 08:57:53,264 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:53,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 261 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:57:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-13 08:57:53,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-13 08:57:53,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-13 08:57:53,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 875 transitions. [2024-09-13 08:57:53,566 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 875 transitions. Word has length 51 [2024-09-13 08:57:53,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:53,566 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 875 transitions. [2024-09-13 08:57:53,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:57:53,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:53,567 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 875 transitions. [2024-09-13 08:57:53,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:57:53,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:53,571 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:53,583 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-09-13 08:57:53,771 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-09-13 08:57:53,771 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:53,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:53,772 INFO L85 PathProgramCache]: Analyzing trace with hash 1631662044, now seen corresponding path program 70 times [2024-09-13 08:57:53,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:53,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569611238] [2024-09-13 08:57:53,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:53,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:53,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:53,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:53,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:53,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:53,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:54,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:57:54,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:54,266 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:54,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:54,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569611238] [2024-09-13 08:57:54,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569611238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:54,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003224759] [2024-09-13 08:57:54,266 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:57:54,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:54,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:54,267 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:54,268 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-13 08:57:54,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:57:54,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:54,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 08:57:54,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:54,488 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:54,488 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:54,602 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:57:54,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003224759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:54,603 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:54,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 42 [2024-09-13 08:57:54,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806047520] [2024-09-13 08:57:54,603 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:54,603 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:57:54,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:54,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:57:54,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:54,604 INFO L87 Difference]: Start difference. First operand 769 states and 875 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:55,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:55,556 INFO L93 Difference]: Finished difference Result 875 states and 996 transitions. [2024-09-13 08:57:55,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 08:57:55,557 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-13 08:57:55,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:55,563 INFO L225 Difference]: With dead ends: 875 [2024-09-13 08:57:55,563 INFO L226 Difference]: Without dead ends: 869 [2024-09-13 08:57:55,568 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:57:55,568 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 108 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:55,568 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 3459 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:55,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2024-09-13 08:57:55,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 783. [2024-09-13 08:57:55,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 693 states have (on average 1.155844155844156) internal successors, (801), 747 states have internal predecessors, (801), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2024-09-13 08:57:55,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 892 transitions. [2024-09-13 08:57:55,890 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 892 transitions. Word has length 52 [2024-09-13 08:57:55,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:55,890 INFO L474 AbstractCegarLoop]: Abstraction has 783 states and 892 transitions. [2024-09-13 08:57:55,890 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:55,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:55,890 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 892 transitions. [2024-09-13 08:57:55,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:57:55,895 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:55,896 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:55,908 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2024-09-13 08:57:56,096 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:56,096 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:56,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:56,097 INFO L85 PathProgramCache]: Analyzing trace with hash 722880988, now seen corresponding path program 71 times [2024-09-13 08:57:56,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:56,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435716090] [2024-09-13 08:57:56,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:56,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:56,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:56,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:56,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:56,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:56,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:57:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:56,536 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:56,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:56,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435716090] [2024-09-13 08:57:56,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435716090] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:56,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893743727] [2024-09-13 08:57:56,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:57:56,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:56,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:56,537 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:56,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-13 08:57:56,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:57:56,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:56,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-13 08:57:56,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:56,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:56,876 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:57:56,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893743727] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:56,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:56,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2024-09-13 08:57:56,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513315707] [2024-09-13 08:57:56,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:56,877 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:57:56,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:56,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:57:56,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:56,878 INFO L87 Difference]: Start difference. First operand 783 states and 892 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:57,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:57,770 INFO L93 Difference]: Finished difference Result 789 states and 897 transitions. [2024-09-13 08:57:57,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:57:57,770 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-13 08:57:57,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:57,774 INFO L225 Difference]: With dead ends: 789 [2024-09-13 08:57:57,774 INFO L226 Difference]: Without dead ends: 769 [2024-09-13 08:57:57,779 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:57:57,779 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:57,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2954 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:57:57,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-13 08:57:58,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-13 08:57:58,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-13 08:57:58,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 876 transitions. [2024-09-13 08:57:58,065 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 876 transitions. Word has length 52 [2024-09-13 08:57:58,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:57:58,065 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 876 transitions. [2024-09-13 08:57:58,065 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:58,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:58,065 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 876 transitions. [2024-09-13 08:57:58,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:57:58,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:57:58,069 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:57:58,081 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-13 08:57:58,269 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:58,270 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:57:58,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:57:58,270 INFO L85 PathProgramCache]: Analyzing trace with hash 996657116, now seen corresponding path program 72 times [2024-09-13 08:57:58,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:57:58,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638352965] [2024-09-13 08:57:58,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:57:58,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:57:58,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:58,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:57:58,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:58,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:57:58,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:58,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:57:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:57:58,650 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:58,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:57:58,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638352965] [2024-09-13 08:57:58,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638352965] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:57:58,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814817775] [2024-09-13 08:57:58,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:57:58,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:57:58,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:57:58,652 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:57:58,653 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-13 08:57:58,750 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:57:58,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:57:58,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:57:58,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:57:58,983 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:58,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:57:59,113 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:57:59,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814817775] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:57:59,114 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:57:59,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 42 [2024-09-13 08:57:59,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728913373] [2024-09-13 08:57:59,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:57:59,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:57:59,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:57:59,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:57:59,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1623, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:57:59,115 INFO L87 Difference]: Start difference. First operand 769 states and 876 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:57:59,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:57:59,857 INFO L93 Difference]: Finished difference Result 775 states and 881 transitions. [2024-09-13 08:57:59,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:57:59,858 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-13 08:57:59,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:57:59,862 INFO L225 Difference]: With dead ends: 775 [2024-09-13 08:57:59,862 INFO L226 Difference]: Without dead ends: 753 [2024-09-13 08:57:59,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:57:59,867 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:57:59,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2189 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:57:59,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-09-13 08:58:00,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2024-09-13 08:58:00,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 669 states have (on average 1.155455904334828) internal successors, (773), 719 states have internal predecessors, (773), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2024-09-13 08:58:00,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 858 transitions. [2024-09-13 08:58:00,192 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 858 transitions. Word has length 52 [2024-09-13 08:58:00,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:00,192 INFO L474 AbstractCegarLoop]: Abstraction has 753 states and 858 transitions. [2024-09-13 08:58:00,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:00,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:00,192 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 858 transitions. [2024-09-13 08:58:00,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:58:00,196 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:00,196 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:00,208 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-13 08:58:00,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:00,397 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:00,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:00,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1811395036, now seen corresponding path program 73 times [2024-09-13 08:58:00,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:00,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307367770] [2024-09-13 08:58:00,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:00,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:00,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:00,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:00,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:00,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:00,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:58:00,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:00,746 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:00,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307367770] [2024-09-13 08:58:00,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307367770] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:00,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705892589] [2024-09-13 08:58:00,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:58:00,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:00,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:00,748 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:00,748 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-13 08:58:00,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:00,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:58:00,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:01,064 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:01,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:01,169 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:01,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705892589] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:01,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:01,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 42 [2024-09-13 08:58:01,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874096964] [2024-09-13 08:58:01,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:01,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:58:01,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:01,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:58:01,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:58:01,170 INFO L87 Difference]: Start difference. First operand 753 states and 858 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:01,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:01,819 INFO L93 Difference]: Finished difference Result 759 states and 863 transitions. [2024-09-13 08:58:01,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:58:01,819 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-13 08:58:01,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:01,823 INFO L225 Difference]: With dead ends: 759 [2024-09-13 08:58:01,823 INFO L226 Difference]: Without dead ends: 735 [2024-09-13 08:58:01,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:58:01,828 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:01,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1521 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:58:01,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-13 08:58:02,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2024-09-13 08:58:02,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 654 states have (on average 1.1559633027522935) internal successors, (756), 702 states have internal predecessors, (756), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2024-09-13 08:58:02,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 838 transitions. [2024-09-13 08:58:02,126 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 838 transitions. Word has length 52 [2024-09-13 08:58:02,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:02,126 INFO L474 AbstractCegarLoop]: Abstraction has 735 states and 838 transitions. [2024-09-13 08:58:02,126 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:02,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:02,127 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 838 transitions. [2024-09-13 08:58:02,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:58:02,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:02,130 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:02,143 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-13 08:58:02,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:02,331 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:02,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:02,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1405283885, now seen corresponding path program 74 times [2024-09-13 08:58:02,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:02,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781268394] [2024-09-13 08:58:02,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:02,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:02,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:02,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:02,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:02,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:02,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:02,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-13 08:58:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:02,592 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:58:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781268394] [2024-09-13 08:58:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781268394] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545888539] [2024-09-13 08:58:02,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:58:02,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:02,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:02,593 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:02,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-13 08:58:02,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:58:02,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:02,667 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:58:02,668 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:02,907 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 08:58:02,907 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 08:58:03,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545888539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:03,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:03,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-13 08:58:03,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570593633] [2024-09-13 08:58:03,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:03,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:03,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:03,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:03,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:03,341 INFO L87 Difference]: Start difference. First operand 735 states and 838 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:04,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:04,153 INFO L93 Difference]: Finished difference Result 803 states and 924 transitions. [2024-09-13 08:58:04,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:58:04,153 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-13 08:58:04,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:04,170 INFO L225 Difference]: With dead ends: 803 [2024-09-13 08:58:04,170 INFO L226 Difference]: Without dead ends: 786 [2024-09-13 08:58:04,176 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:58:04,176 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:04,177 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 634 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:58:04,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-09-13 08:58:04,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 782. [2024-09-13 08:58:04,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 674 states have (on average 1.1498516320474776) internal successors, (775), 740 states have internal predecessors, (775), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-13 08:58:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 893 transitions. [2024-09-13 08:58:04,494 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 893 transitions. Word has length 52 [2024-09-13 08:58:04,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:04,494 INFO L474 AbstractCegarLoop]: Abstraction has 782 states and 893 transitions. [2024-09-13 08:58:04,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:04,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 893 transitions. [2024-09-13 08:58:04,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:58:04,499 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:04,499 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:04,511 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-09-13 08:58:04,699 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:04,699 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:04,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:04,700 INFO L85 PathProgramCache]: Analyzing trace with hash 635330524, now seen corresponding path program 75 times [2024-09-13 08:58:04,700 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:04,700 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409299866] [2024-09-13 08:58:04,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:04,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:04,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:04,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:04,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:04,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:04,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:04,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:58:04,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:05,017 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:05,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:05,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409299866] [2024-09-13 08:58:05,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409299866] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:05,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487792497] [2024-09-13 08:58:05,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:58:05,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:05,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:05,019 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:05,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-13 08:58:05,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-13 08:58:05,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:05,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:58:05,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:05,382 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:05,382 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:05,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487792497] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:05,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:05,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2024-09-13 08:58:05,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712796959] [2024-09-13 08:58:05,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:05,504 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-13 08:58:05,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:05,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-13 08:58:05,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2024-09-13 08:58:05,505 INFO L87 Difference]: Start difference. First operand 782 states and 893 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:06,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:06,090 INFO L93 Difference]: Finished difference Result 798 states and 913 transitions. [2024-09-13 08:58:06,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:58:06,090 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-13 08:58:06,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:06,096 INFO L225 Difference]: With dead ends: 798 [2024-09-13 08:58:06,096 INFO L226 Difference]: Without dead ends: 781 [2024-09-13 08:58:06,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:58:06,102 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:06,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1129 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:58:06,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2024-09-13 08:58:06,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 777. [2024-09-13 08:58:06,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 669 states have (on average 1.1524663677130045) internal successors, (771), 735 states have internal predecessors, (771), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-13 08:58:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 889 transitions. [2024-09-13 08:58:06,415 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 889 transitions. Word has length 52 [2024-09-13 08:58:06,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:06,415 INFO L474 AbstractCegarLoop]: Abstraction has 777 states and 889 transitions. [2024-09-13 08:58:06,415 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:06,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:06,415 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 889 transitions. [2024-09-13 08:58:06,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-13 08:58:06,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:06,420 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:06,432 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-13 08:58:06,620 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:06,620 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:06,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:06,621 INFO L85 PathProgramCache]: Analyzing trace with hash -882558989, now seen corresponding path program 76 times [2024-09-13 08:58:06,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:06,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19683560] [2024-09-13 08:58:06,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:06,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:06,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:06,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:06,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:06,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:06,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:06,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:06,901 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 08:58:06,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:06,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19683560] [2024-09-13 08:58:06,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19683560] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:06,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994303305] [2024-09-13 08:58:06,901 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:58:06,902 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:06,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:06,903 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:06,903 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-13 08:58:06,975 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:58:06,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:06,976 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-13 08:58:06,976 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:07,221 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 08:58:07,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-13 08:58:07,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994303305] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:07,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:07,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-13 08:58:07,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590609730] [2024-09-13 08:58:07,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:07,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:07,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:07,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:07,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:07,650 INFO L87 Difference]: Start difference. First operand 777 states and 889 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:08,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:08,426 INFO L93 Difference]: Finished difference Result 789 states and 900 transitions. [2024-09-13 08:58:08,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-13 08:58:08,426 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-13 08:58:08,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:08,431 INFO L225 Difference]: With dead ends: 789 [2024-09-13 08:58:08,431 INFO L226 Difference]: Without dead ends: 765 [2024-09-13 08:58:08,436 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 08:58:08,436 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:08,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 626 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:58:08,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2024-09-13 08:58:08,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 763. [2024-09-13 08:58:08,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 655 states have (on average 1.1526717557251909) internal successors, (755), 721 states have internal predecessors, (755), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2024-09-13 08:58:08,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 865 transitions. [2024-09-13 08:58:08,767 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 865 transitions. Word has length 52 [2024-09-13 08:58:08,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:08,767 INFO L474 AbstractCegarLoop]: Abstraction has 763 states and 865 transitions. [2024-09-13 08:58:08,767 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:08,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:08,767 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 865 transitions. [2024-09-13 08:58:08,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:58:08,773 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:08,773 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:08,784 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-13 08:58:08,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-09-13 08:58:08,973 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:08,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:08,973 INFO L85 PathProgramCache]: Analyzing trace with hash 94534779, now seen corresponding path program 77 times [2024-09-13 08:58:08,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:08,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179200806] [2024-09-13 08:58:08,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:08,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:08,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:09,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:09,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:09,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:09,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:58:09,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:09,410 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:09,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179200806] [2024-09-13 08:58:09,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179200806] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:09,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558625434] [2024-09-13 08:58:09,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:58:09,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:09,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:09,412 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:09,412 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-13 08:58:09,490 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-13 08:58:09,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:09,491 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-13 08:58:09,492 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:10,114 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:11,206 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:11,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1558625434] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:11,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:11,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-13 08:58:11,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213125028] [2024-09-13 08:58:11,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:11,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-13 08:58:11,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:11,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-13 08:58:11,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 08:58:11,208 INFO L87 Difference]: Start difference. First operand 763 states and 865 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:13,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:13,178 INFO L93 Difference]: Finished difference Result 869 states and 992 transitions. [2024-09-13 08:58:13,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 08:58:13,178 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-13 08:58:13,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:13,189 INFO L225 Difference]: With dead ends: 869 [2024-09-13 08:58:13,189 INFO L226 Difference]: Without dead ends: 856 [2024-09-13 08:58:13,196 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-13 08:58:13,197 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:13,197 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 985 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:58:13,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-09-13 08:58:13,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 848. [2024-09-13 08:58:13,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 728 states have (on average 1.151098901098901) internal successors, (838), 802 states have internal predecessors, (838), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2024-09-13 08:58:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 964 transitions. [2024-09-13 08:58:13,573 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 964 transitions. Word has length 53 [2024-09-13 08:58:13,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:13,573 INFO L474 AbstractCegarLoop]: Abstraction has 848 states and 964 transitions. [2024-09-13 08:58:13,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:13,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:13,573 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 964 transitions. [2024-09-13 08:58:13,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:58:13,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:13,578 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:13,590 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2024-09-13 08:58:13,779 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:13,779 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:13,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:13,779 INFO L85 PathProgramCache]: Analyzing trace with hash -976047406, now seen corresponding path program 78 times [2024-09-13 08:58:13,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:13,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035583907] [2024-09-13 08:58:13,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:13,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:13,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:13,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:13,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:13,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:13,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:13,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:14,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035583907] [2024-09-13 08:58:14,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035583907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:14,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312171488] [2024-09-13 08:58:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:58:14,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:14,228 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:14,229 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-13 08:58:14,307 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-13 08:58:14,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:14,308 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-13 08:58:14,309 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:14,887 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:14,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312171488] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:15,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-13 08:58:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982943543] [2024-09-13 08:58:15,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:15,898 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-13 08:58:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-13 08:58:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-13 08:58:15,899 INFO L87 Difference]: Start difference. First operand 848 states and 964 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:17,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:17,829 INFO L93 Difference]: Finished difference Result 862 states and 978 transitions. [2024-09-13 08:58:17,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-13 08:58:17,829 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-13 08:58:17,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:17,834 INFO L225 Difference]: With dead ends: 862 [2024-09-13 08:58:17,834 INFO L226 Difference]: Without dead ends: 851 [2024-09-13 08:58:17,840 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-13 08:58:17,840 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:17,840 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1380 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:58:17,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-09-13 08:58:18,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 849. [2024-09-13 08:58:18,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 729 states have (on average 1.1508916323731138) internal successors, (839), 803 states have internal predecessors, (839), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-13 08:58:18,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 960 transitions. [2024-09-13 08:58:18,214 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 960 transitions. Word has length 53 [2024-09-13 08:58:18,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:18,214 INFO L474 AbstractCegarLoop]: Abstraction has 849 states and 960 transitions. [2024-09-13 08:58:18,214 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:18,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:18,215 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 960 transitions. [2024-09-13 08:58:18,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:58:18,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:18,220 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:18,231 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-09-13 08:58:18,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:18,420 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:18,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:18,421 INFO L85 PathProgramCache]: Analyzing trace with hash 205782261, now seen corresponding path program 79 times [2024-09-13 08:58:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:18,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870217001] [2024-09-13 08:58:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:18,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:18,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:18,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:18,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:18,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:18,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:18,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:18,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870217001] [2024-09-13 08:58:18,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870217001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:18,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071962260] [2024-09-13 08:58:18,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:58:18,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:18,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:18,546 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:18,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-13 08:58:18,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:18,625 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:58:18,626 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:18,687 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:18,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:18,747 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:18,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071962260] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:18,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:18,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-13 08:58:18,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132656651] [2024-09-13 08:58:18,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:18,748 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:58:18,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:18,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:58:18,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:58:18,749 INFO L87 Difference]: Start difference. First operand 849 states and 960 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:58:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:19,220 INFO L93 Difference]: Finished difference Result 882 states and 1001 transitions. [2024-09-13 08:58:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 08:58:19,220 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-09-13 08:58:19,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:19,225 INFO L225 Difference]: With dead ends: 882 [2024-09-13 08:58:19,225 INFO L226 Difference]: Without dead ends: 854 [2024-09-13 08:58:19,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:58:19,232 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:19,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:58:19,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2024-09-13 08:58:19,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 844. [2024-09-13 08:58:19,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 730 states have (on average 1.1452054794520548) internal successors, (836), 800 states have internal predecessors, (836), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-13 08:58:19,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 949 transitions. [2024-09-13 08:58:19,611 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 949 transitions. Word has length 53 [2024-09-13 08:58:19,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:19,612 INFO L474 AbstractCegarLoop]: Abstraction has 844 states and 949 transitions. [2024-09-13 08:58:19,612 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:58:19,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:19,612 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 949 transitions. [2024-09-13 08:58:19,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-13 08:58:19,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:19,617 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:19,628 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2024-09-13 08:58:19,817 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:19,817 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:19,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:19,818 INFO L85 PathProgramCache]: Analyzing trace with hash -229324870, now seen corresponding path program 80 times [2024-09-13 08:58:19,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:19,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022270650] [2024-09-13 08:58:19,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:19,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:19,850 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:19,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:19,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:19,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:19,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-13 08:58:19,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:19,925 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:19,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022270650] [2024-09-13 08:58:19,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022270650] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:19,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613908056] [2024-09-13 08:58:19,925 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:58:19,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:19,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:19,926 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:19,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-13 08:58:20,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:58:20,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:20,007 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-13 08:58:20,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:20,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:20,140 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:20,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613908056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:20,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:20,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-13 08:58:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901733838] [2024-09-13 08:58:20,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:20,140 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-13 08:58:20,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-13 08:58:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-13 08:58:20,141 INFO L87 Difference]: Start difference. First operand 844 states and 949 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:20,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:20,631 INFO L93 Difference]: Finished difference Result 1290 states and 1433 transitions. [2024-09-13 08:58:20,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 08:58:20,631 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-09-13 08:58:20,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:20,647 INFO L225 Difference]: With dead ends: 1290 [2024-09-13 08:58:20,648 INFO L226 Difference]: Without dead ends: 855 [2024-09-13 08:58:20,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-13 08:58:20,656 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:20,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 204 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:58:20,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-13 08:58:21,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-13 08:58:21,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-13 08:58:21,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 960 transitions. [2024-09-13 08:58:21,042 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 960 transitions. Word has length 53 [2024-09-13 08:58:21,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:21,042 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 960 transitions. [2024-09-13 08:58:21,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:21,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:21,042 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 960 transitions. [2024-09-13 08:58:21,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:21,047 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:21,047 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:21,059 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-09-13 08:58:21,247 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:21,248 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:21,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:21,248 INFO L85 PathProgramCache]: Analyzing trace with hash 859920453, now seen corresponding path program 81 times [2024-09-13 08:58:21,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:21,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492785462] [2024-09-13 08:58:21,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:21,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:21,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:21,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:21,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:21,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:21,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:21,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:21,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:21,738 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:21,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:21,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492785462] [2024-09-13 08:58:21,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492785462] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:21,738 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472106735] [2024-09-13 08:58:21,738 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:58:21,738 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:21,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:21,740 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:21,740 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-13 08:58:21,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 08:58:21,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:21,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 08:58:21,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:21,995 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:21,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:22,117 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:22,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [472106735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:22,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:22,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 44 [2024-09-13 08:58:22,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110342637] [2024-09-13 08:58:22,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:22,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:22,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:22,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:22,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:22,118 INFO L87 Difference]: Start difference. First operand 855 states and 960 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:23,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:23,259 INFO L93 Difference]: Finished difference Result 967 states and 1087 transitions. [2024-09-13 08:58:23,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-13 08:58:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:23,266 INFO L225 Difference]: With dead ends: 967 [2024-09-13 08:58:23,267 INFO L226 Difference]: Without dead ends: 961 [2024-09-13 08:58:23,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:23,275 INFO L434 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:23,275 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3984 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:58:23,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-09-13 08:58:23,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 869. [2024-09-13 08:58:23,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 752 states have (on average 1.1436170212765957) internal successors, (860), 824 states have internal predecessors, (860), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2024-09-13 08:58:23,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 977 transitions. [2024-09-13 08:58:23,634 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 977 transitions. Word has length 54 [2024-09-13 08:58:23,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:23,635 INFO L474 AbstractCegarLoop]: Abstraction has 869 states and 977 transitions. [2024-09-13 08:58:23,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:23,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:23,635 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 977 transitions. [2024-09-13 08:58:23,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:23,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:23,640 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:23,652 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-09-13 08:58:23,840 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:23,841 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:23,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:23,841 INFO L85 PathProgramCache]: Analyzing trace with hash -1993786783, now seen corresponding path program 82 times [2024-09-13 08:58:23,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:23,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654086572] [2024-09-13 08:58:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:23,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:23,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:23,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:23,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:24,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:24,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:24,291 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:24,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654086572] [2024-09-13 08:58:24,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654086572] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:24,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141969662] [2024-09-13 08:58:24,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:58:24,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:24,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:24,292 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:24,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-13 08:58:24,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:58:24,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:24,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 08:58:24,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:24,569 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:24,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:24,686 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:24,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141969662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:24,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:24,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 44 [2024-09-13 08:58:24,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326445305] [2024-09-13 08:58:24,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:24,687 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:24,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:24,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:24,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:24,688 INFO L87 Difference]: Start difference. First operand 869 states and 977 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:25,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:25,695 INFO L93 Difference]: Finished difference Result 875 states and 982 transitions. [2024-09-13 08:58:25,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 08:58:25,695 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:25,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:25,700 INFO L225 Difference]: With dead ends: 875 [2024-09-13 08:58:25,700 INFO L226 Difference]: Without dead ends: 855 [2024-09-13 08:58:25,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=2325, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:25,710 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 96 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:25,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3320 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:58:25,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-13 08:58:26,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-13 08:58:26,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2024-09-13 08:58:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 961 transitions. [2024-09-13 08:58:26,103 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 961 transitions. Word has length 54 [2024-09-13 08:58:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:26,103 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 961 transitions. [2024-09-13 08:58:26,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:26,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 961 transitions. [2024-09-13 08:58:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:26,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:26,108 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:26,121 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-09-13 08:58:26,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:26,309 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:26,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:26,309 INFO L85 PathProgramCache]: Analyzing trace with hash 1858550853, now seen corresponding path program 83 times [2024-09-13 08:58:26,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:26,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27186991] [2024-09-13 08:58:26,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:26,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:26,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:26,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:26,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:26,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:26,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:26,741 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:26,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27186991] [2024-09-13 08:58:26,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27186991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:26,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154296309] [2024-09-13 08:58:26,741 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:58:26,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:26,741 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:26,742 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:26,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-13 08:58:26,824 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:58:26,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:26,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:58:26,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:27,063 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:27,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:27,177 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:27,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154296309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:27,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:27,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 44 [2024-09-13 08:58:27,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416731402] [2024-09-13 08:58:27,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:27,178 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:27,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:27,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:27,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:27,178 INFO L87 Difference]: Start difference. First operand 855 states and 961 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:28,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:28,072 INFO L93 Difference]: Finished difference Result 861 states and 966 transitions. [2024-09-13 08:58:28,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:58:28,072 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:28,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:28,078 INFO L225 Difference]: With dead ends: 861 [2024-09-13 08:58:28,078 INFO L226 Difference]: Without dead ends: 839 [2024-09-13 08:58:28,084 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=2321, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:28,084 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:28,085 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2581 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:58:28,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-09-13 08:58:28,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2024-09-13 08:58:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 728 states have (on average 1.1428571428571428) internal successors, (832), 796 states have internal predecessors, (832), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2024-09-13 08:58:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 943 transitions. [2024-09-13 08:58:28,469 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 943 transitions. Word has length 54 [2024-09-13 08:58:28,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:28,469 INFO L474 AbstractCegarLoop]: Abstraction has 839 states and 943 transitions. [2024-09-13 08:58:28,469 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:28,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:28,470 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 943 transitions. [2024-09-13 08:58:28,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:28,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:28,474 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:28,487 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-09-13 08:58:28,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:28,675 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:28,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:28,675 INFO L85 PathProgramCache]: Analyzing trace with hash -295057823, now seen corresponding path program 84 times [2024-09-13 08:58:28,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:28,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285958786] [2024-09-13 08:58:28,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:28,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:28,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:28,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:28,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:28,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:28,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:29,118 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:29,119 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285958786] [2024-09-13 08:58:29,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285958786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:29,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588160928] [2024-09-13 08:58:29,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:58:29,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:29,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:29,120 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:29,124 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-13 08:58:29,206 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:58:29,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:29,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:58:29,208 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:29,474 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:29,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:29,586 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:29,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [588160928] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:29,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:29,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 44 [2024-09-13 08:58:29,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618929084] [2024-09-13 08:58:29,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:29,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:29,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:29,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:29,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:29,587 INFO L87 Difference]: Start difference. First operand 839 states and 943 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:30,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:30,401 INFO L93 Difference]: Finished difference Result 845 states and 948 transitions. [2024-09-13 08:58:30,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:58:30,401 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:30,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:30,406 INFO L225 Difference]: With dead ends: 845 [2024-09-13 08:58:30,406 INFO L226 Difference]: Without dead ends: 821 [2024-09-13 08:58:30,411 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:30,411 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 56 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:30,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2048 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:58:30,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2024-09-13 08:58:30,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2024-09-13 08:58:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 713 states have (on average 1.1430575035063113) internal successors, (815), 779 states have internal predecessors, (815), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2024-09-13 08:58:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 923 transitions. [2024-09-13 08:58:30,754 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 923 transitions. Word has length 54 [2024-09-13 08:58:30,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:30,754 INFO L474 AbstractCegarLoop]: Abstraction has 821 states and 923 transitions. [2024-09-13 08:58:30,754 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:30,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:30,754 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 923 transitions. [2024-09-13 08:58:30,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:30,759 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:30,759 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:30,771 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-09-13 08:58:30,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:30,959 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:30,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:30,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1620066373, now seen corresponding path program 85 times [2024-09-13 08:58:30,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:30,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39782245] [2024-09-13 08:58:30,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:30,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:31,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:31,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:31,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:31,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:31,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:31,326 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:31,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39782245] [2024-09-13 08:58:31,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [39782245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:31,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1845064462] [2024-09-13 08:58:31,326 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:58:31,326 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:31,326 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:31,327 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:31,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-13 08:58:31,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:31,410 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:58:31,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:31,713 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:31,713 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:31,818 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:58:31,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1845064462] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:31,818 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:31,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 44 [2024-09-13 08:58:31,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350185453] [2024-09-13 08:58:31,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:31,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:31,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:31,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:31,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:31,819 INFO L87 Difference]: Start difference. First operand 821 states and 923 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:32,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:32,548 INFO L93 Difference]: Finished difference Result 827 states and 928 transitions. [2024-09-13 08:58:32,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:58:32,549 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:32,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:32,553 INFO L225 Difference]: With dead ends: 827 [2024-09-13 08:58:32,553 INFO L226 Difference]: Without dead ends: 801 [2024-09-13 08:58:32,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:32,562 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:32,562 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1474 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:58:32,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-09-13 08:58:32,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2024-09-13 08:58:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 696 states have (on average 1.1436781609195403) internal successors, (796), 760 states have internal predecessors, (796), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2024-09-13 08:58:32,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 901 transitions. [2024-09-13 08:58:32,916 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 901 transitions. Word has length 54 [2024-09-13 08:58:32,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:32,916 INFO L474 AbstractCegarLoop]: Abstraction has 801 states and 901 transitions. [2024-09-13 08:58:32,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:32,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:32,917 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 901 transitions. [2024-09-13 08:58:32,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-13 08:58:32,921 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:32,921 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:32,933 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-09-13 08:58:33,122 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:33,122 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:33,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:33,122 INFO L85 PathProgramCache]: Analyzing trace with hash -1081658783, now seen corresponding path program 86 times [2024-09-13 08:58:33,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:33,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054405631] [2024-09-13 08:58:33,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:33,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:33,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:33,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:33,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:33,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:33,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:58:33,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:33,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054405631] [2024-09-13 08:58:33,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054405631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:33,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983140283] [2024-09-13 08:58:33,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:58:33,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:33,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:33,482 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:33,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-13 08:58:33,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:58:33,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:33,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-13 08:58:33,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:58:33,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:34,000 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:58:34,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [983140283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:34,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:34,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2024-09-13 08:58:34,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994445488] [2024-09-13 08:58:34,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:34,001 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-13 08:58:34,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:34,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-13 08:58:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2024-09-13 08:58:34,002 INFO L87 Difference]: Start difference. First operand 801 states and 901 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:34,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:34,602 INFO L93 Difference]: Finished difference Result 817 states and 920 transitions. [2024-09-13 08:58:34,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-13 08:58:34,603 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-13 08:58:34,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:34,611 INFO L225 Difference]: With dead ends: 817 [2024-09-13 08:58:34,611 INFO L226 Difference]: Without dead ends: 811 [2024-09-13 08:58:34,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:58:34,618 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:34,619 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 810 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 08:58:34,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2024-09-13 08:58:34,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 809. [2024-09-13 08:58:34,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 701 states have (on average 1.145506419400856) internal successors, (803), 767 states have internal predecessors, (803), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2024-09-13 08:58:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 912 transitions. [2024-09-13 08:58:34,992 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 912 transitions. Word has length 54 [2024-09-13 08:58:34,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:34,993 INFO L474 AbstractCegarLoop]: Abstraction has 809 states and 912 transitions. [2024-09-13 08:58:34,993 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:34,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:34,993 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 912 transitions. [2024-09-13 08:58:34,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:58:34,998 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:34,998 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:35,011 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-09-13 08:58:35,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2024-09-13 08:58:35,198 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:35,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:35,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1940349234, now seen corresponding path program 87 times [2024-09-13 08:58:35,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:35,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629618643] [2024-09-13 08:58:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:35,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:35,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:35,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:35,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:35,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:35,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:35,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:35,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:35,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:35,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629618643] [2024-09-13 08:58:35,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629618643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:35,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344027617] [2024-09-13 08:58:35,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:58:35,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:35,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:35,685 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:35,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-13 08:58:35,771 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-13 08:58:35,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:35,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 08:58:35,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:36,457 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:36,457 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:37,626 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:37,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344027617] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:37,626 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:37,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-13 08:58:37,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262825048] [2024-09-13 08:58:37,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:37,627 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-13 08:58:37,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-13 08:58:37,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-13 08:58:37,628 INFO L87 Difference]: Start difference. First operand 809 states and 912 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:39,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:39,835 INFO L93 Difference]: Finished difference Result 917 states and 1041 transitions. [2024-09-13 08:58:39,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 08:58:39,835 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-13 08:58:39,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:39,849 INFO L225 Difference]: With dead ends: 917 [2024-09-13 08:58:39,850 INFO L226 Difference]: Without dead ends: 904 [2024-09-13 08:58:39,858 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-13 08:58:39,858 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:39,858 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1008 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:58:39,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-09-13 08:58:40,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2024-09-13 08:58:40,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 776 states have (on average 1.1443298969072164) internal successors, (888), 850 states have internal predecessors, (888), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2024-09-13 08:58:40,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1013 transitions. [2024-09-13 08:58:40,284 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1013 transitions. Word has length 55 [2024-09-13 08:58:40,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:40,284 INFO L474 AbstractCegarLoop]: Abstraction has 896 states and 1013 transitions. [2024-09-13 08:58:40,284 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:40,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:40,284 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1013 transitions. [2024-09-13 08:58:40,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:58:40,290 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:40,290 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:40,301 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2024-09-13 08:58:40,490 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-13 08:58:40,490 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:40,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:40,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1182927429, now seen corresponding path program 88 times [2024-09-13 08:58:40,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:40,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47238897] [2024-09-13 08:58:40,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:40,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:40,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:40,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:40,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:40,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:40,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:40,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:40,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47238897] [2024-09-13 08:58:40,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47238897] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:40,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986705162] [2024-09-13 08:58:40,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:58:40,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:40,979 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:40,980 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:40,981 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-13 08:58:41,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:58:41,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:41,062 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 08:58:41,063 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:41,753 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:41,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:58:42,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986705162] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:42,910 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:42,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-13 08:58:42,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119101236] [2024-09-13 08:58:42,910 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:42,910 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-13 08:58:42,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:42,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-13 08:58:42,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-13 08:58:42,912 INFO L87 Difference]: Start difference. First operand 896 states and 1013 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:45,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:45,135 INFO L93 Difference]: Finished difference Result 910 states and 1027 transitions. [2024-09-13 08:58:45,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-13 08:58:45,135 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-13 08:58:45,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:45,140 INFO L225 Difference]: With dead ends: 910 [2024-09-13 08:58:45,140 INFO L226 Difference]: Without dead ends: 899 [2024-09-13 08:58:45,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-13 08:58:45,148 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:45,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1256 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:58:45,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-09-13 08:58:45,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2024-09-13 08:58:45,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 777 states have (on average 1.1441441441441442) internal successors, (889), 851 states have internal predecessors, (889), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-13 08:58:45,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1009 transitions. [2024-09-13 08:58:45,592 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1009 transitions. Word has length 55 [2024-09-13 08:58:45,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:45,592 INFO L474 AbstractCegarLoop]: Abstraction has 897 states and 1009 transitions. [2024-09-13 08:58:45,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:58:45,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:45,592 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1009 transitions. [2024-09-13 08:58:45,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:58:45,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:45,598 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:45,610 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2024-09-13 08:58:45,798 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:45,799 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:45,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:45,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1734206310, now seen corresponding path program 89 times [2024-09-13 08:58:45,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:45,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700528450] [2024-09-13 08:58:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:45,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:45,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:45,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:45,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:45,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:45,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:45,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:45,914 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:45,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700528450] [2024-09-13 08:58:45,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700528450] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:45,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022912308] [2024-09-13 08:58:45,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:58:45,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:45,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:45,916 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:45,917 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-13 08:58:46,010 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:58:46,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:46,011 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 08:58:46,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:46,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:46,169 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:46,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022912308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:46,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:46,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-13 08:58:46,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305396272] [2024-09-13 08:58:46,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:46,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 08:58:46,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:46,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 08:58:46,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-13 08:58:46,170 INFO L87 Difference]: Start difference. First operand 897 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:46,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:46,815 INFO L93 Difference]: Finished difference Result 1477 states and 1656 transitions. [2024-09-13 08:58:46,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-13 08:58:46,816 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-09-13 08:58:46,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:46,841 INFO L225 Difference]: With dead ends: 1477 [2024-09-13 08:58:46,841 INFO L226 Difference]: Without dead ends: 1007 [2024-09-13 08:58:46,850 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 08:58:46,850 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:46,850 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 306 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:58:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-09-13 08:58:47,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2024-09-13 08:58:47,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 887 states have (on average 1.1409244644870349) internal successors, (1012), 961 states have internal predecessors, (1012), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-13 08:58:47,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1132 transitions. [2024-09-13 08:58:47,523 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1132 transitions. Word has length 55 [2024-09-13 08:58:47,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:47,524 INFO L474 AbstractCegarLoop]: Abstraction has 1007 states and 1132 transitions. [2024-09-13 08:58:47,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:47,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:47,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1132 transitions. [2024-09-13 08:58:47,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-13 08:58:47,529 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:47,530 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:47,541 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-09-13 08:58:47,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:47,730 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:47,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:47,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1957341813, now seen corresponding path program 90 times [2024-09-13 08:58:47,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:47,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194066268] [2024-09-13 08:58:47,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:47,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:47,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:47,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:47,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:47,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:58:47,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:47,848 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:47,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194066268] [2024-09-13 08:58:47,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194066268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:47,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927406046] [2024-09-13 08:58:47,848 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:58:47,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:47,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:47,849 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:47,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-13 08:58:47,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:58:47,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:47,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-13 08:58:47,936 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:48,016 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:48,016 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:48,085 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-13 08:58:48,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927406046] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:48,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:48,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-13 08:58:48,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943718852] [2024-09-13 08:58:48,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:48,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 08:58:48,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:48,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 08:58:48,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-13 08:58:48,086 INFO L87 Difference]: Start difference. First operand 1007 states and 1132 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:58:48,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:48,784 INFO L93 Difference]: Finished difference Result 1159 states and 1321 transitions. [2024-09-13 08:58:48,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-13 08:58:48,785 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2024-09-13 08:58:48,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:48,790 INFO L225 Difference]: With dead ends: 1159 [2024-09-13 08:58:48,790 INFO L226 Difference]: Without dead ends: 1117 [2024-09-13 08:58:48,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-13 08:58:48,799 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:48,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 08:58:48,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-13 08:58:49,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-13 08:58:49,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-13 08:58:49,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1255 transitions. [2024-09-13 08:58:49,294 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1255 transitions. Word has length 55 [2024-09-13 08:58:49,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:49,294 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1255 transitions. [2024-09-13 08:58:49,294 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:58:49,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:49,295 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1255 transitions. [2024-09-13 08:58:49,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:58:49,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:49,302 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:49,313 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2024-09-13 08:58:49,502 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:49,502 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:49,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:49,503 INFO L85 PathProgramCache]: Analyzing trace with hash -1258392964, now seen corresponding path program 91 times [2024-09-13 08:58:49,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:49,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135528280] [2024-09-13 08:58:49,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:49,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:49,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:49,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:49,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:49,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:49,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:49,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:49,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:50,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135528280] [2024-09-13 08:58:50,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135528280] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:50,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020580965] [2024-09-13 08:58:50,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:58:50,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:50,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:50,067 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:50,068 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-13 08:58:50,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:50,155 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-13 08:58:50,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:50,357 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:50,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:50,487 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:58:50,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020580965] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:50,487 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:50,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 46 [2024-09-13 08:58:50,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043429095] [2024-09-13 08:58:50,487 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:50,487 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:58:50,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:50,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:58:50,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:58:50,488 INFO L87 Difference]: Start difference. First operand 1117 states and 1255 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:51,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:51,847 INFO L93 Difference]: Finished difference Result 1247 states and 1402 transitions. [2024-09-13 08:58:51,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 08:58:51,847 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:58:51,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:51,858 INFO L225 Difference]: With dead ends: 1247 [2024-09-13 08:58:51,859 INFO L226 Difference]: Without dead ends: 1241 [2024-09-13 08:58:51,869 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:58:51,869 INFO L434 NwaCegarLoop]: 117 mSDtfsCounter, 128 mSDsluCounter, 4344 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:51,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 4461 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-13 08:58:51,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2024-09-13 08:58:52,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1131. [2024-09-13 08:58:52,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1008 states have (on average 1.1388888888888888) internal successors, (1148), 1084 states have internal predecessors, (1148), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2024-09-13 08:58:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1272 transitions. [2024-09-13 08:58:52,422 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1272 transitions. Word has length 56 [2024-09-13 08:58:52,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:52,422 INFO L474 AbstractCegarLoop]: Abstraction has 1131 states and 1272 transitions. [2024-09-13 08:58:52,422 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:52,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:52,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1272 transitions. [2024-09-13 08:58:52,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:58:52,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:52,430 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:52,441 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-09-13 08:58:52,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-13 08:58:52,630 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:52,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:52,631 INFO L85 PathProgramCache]: Analyzing trace with hash 2056222844, now seen corresponding path program 92 times [2024-09-13 08:58:52,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:52,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297238570] [2024-09-13 08:58:52,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:52,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:52,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:52,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:52,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:52,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:52,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:52,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:53,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:53,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297238570] [2024-09-13 08:58:53,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297238570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:53,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729611798] [2024-09-13 08:58:53,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:58:53,131 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:53,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:53,132 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:53,132 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-13 08:58:53,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:58:53,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:53,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 08:58:53,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:53,423 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:53,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:53,547 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:58:53,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1729611798] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:53,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:53,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 46 [2024-09-13 08:58:53,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107721318] [2024-09-13 08:58:53,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:53,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:58:53,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:53,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:58:53,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1967, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:58:53,548 INFO L87 Difference]: Start difference. First operand 1131 states and 1272 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:54,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:54,788 INFO L93 Difference]: Finished difference Result 1137 states and 1277 transitions. [2024-09-13 08:58:54,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-13 08:58:54,788 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:58:54,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:54,794 INFO L225 Difference]: With dead ends: 1137 [2024-09-13 08:58:54,794 INFO L226 Difference]: Without dead ends: 1117 [2024-09-13 08:58:54,802 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:58:54,802 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:54,803 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3823 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:58:54,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-13 08:58:55,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-13 08:58:55,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-13 08:58:55,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1256 transitions. [2024-09-13 08:58:55,304 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1256 transitions. Word has length 56 [2024-09-13 08:58:55,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:55,304 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1256 transitions. [2024-09-13 08:58:55,304 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:55,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:55,305 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1256 transitions. [2024-09-13 08:58:55,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:58:55,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:55,312 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:55,324 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-09-13 08:58:55,512 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-13 08:58:55,512 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:55,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:55,513 INFO L85 PathProgramCache]: Analyzing trace with hash 114260604, now seen corresponding path program 93 times [2024-09-13 08:58:55,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:55,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780330705] [2024-09-13 08:58:55,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:55,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:55,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:55,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:55,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:55,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:55,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:55,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:56,020 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:56,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780330705] [2024-09-13 08:58:56,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780330705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:56,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453083611] [2024-09-13 08:58:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:58:56,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:56,022 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:56,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-13 08:58:56,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 08:58:56,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:56,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 08:58:56,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:56,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:56,472 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:58:56,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453083611] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:56,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:56,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 46 [2024-09-13 08:58:56,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154269570] [2024-09-13 08:58:56,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:56,473 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:58:56,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:56,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:58:56,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1963, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:58:56,474 INFO L87 Difference]: Start difference. First operand 1117 states and 1256 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:57,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:58:57,610 INFO L93 Difference]: Finished difference Result 1123 states and 1261 transitions. [2024-09-13 08:58:57,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 08:58:57,610 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:58:57,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:58:57,616 INFO L225 Difference]: With dead ends: 1123 [2024-09-13 08:58:57,616 INFO L226 Difference]: Without dead ends: 1101 [2024-09-13 08:58:57,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:58:57,626 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:58:57,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3109 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:58:57,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-13 08:58:58,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-09-13 08:58:58,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 984 states have (on average 1.1382113821138211) internal successors, (1120), 1056 states have internal predecessors, (1120), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2024-09-13 08:58:58,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1238 transitions. [2024-09-13 08:58:58,165 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1238 transitions. Word has length 56 [2024-09-13 08:58:58,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:58:58,165 INFO L474 AbstractCegarLoop]: Abstraction has 1101 states and 1238 transitions. [2024-09-13 08:58:58,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:58:58,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:58,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1238 transitions. [2024-09-13 08:58:58,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:58:58,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:58:58,172 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:58:58,184 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2024-09-13 08:58:58,373 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-13 08:58:58,373 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:58:58,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:58:58,373 INFO L85 PathProgramCache]: Analyzing trace with hash 129396860, now seen corresponding path program 94 times [2024-09-13 08:58:58,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:58:58,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122743529] [2024-09-13 08:58:58,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:58:58,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:58:58,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:58,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:58:58,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:58,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:58:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:58,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:58:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:58:58,817 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:58,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:58:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122743529] [2024-09-13 08:58:58,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122743529] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:58:58,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840100995] [2024-09-13 08:58:58,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:58:58,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:58:58,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:58:58,818 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:58:58,819 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-13 08:58:58,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:58:58,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:58:58,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:58:58,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:58:59,182 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:59,182 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:58:59,301 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:58:59,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1840100995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:58:59,301 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:58:59,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 46 [2024-09-13 08:58:59,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608533576] [2024-09-13 08:58:59,302 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:58:59,302 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:58:59,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:58:59,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:58:59,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:58:59,303 INFO L87 Difference]: Start difference. First operand 1101 states and 1238 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:00,323 INFO L93 Difference]: Finished difference Result 1107 states and 1243 transitions. [2024-09-13 08:59:00,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:59:00,323 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:59:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:00,329 INFO L225 Difference]: With dead ends: 1107 [2024-09-13 08:59:00,329 INFO L226 Difference]: Without dead ends: 1083 [2024-09-13 08:59:00,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:59:00,338 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:00,338 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2265 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:59:00,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-09-13 08:59:00,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2024-09-13 08:59:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 969 states have (on average 1.1382868937048503) internal successors, (1103), 1039 states have internal predecessors, (1103), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2024-09-13 08:59:00,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1218 transitions. [2024-09-13 08:59:00,826 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1218 transitions. Word has length 56 [2024-09-13 08:59:00,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:00,826 INFO L474 AbstractCegarLoop]: Abstraction has 1083 states and 1218 transitions. [2024-09-13 08:59:00,827 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:00,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:00,827 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1218 transitions. [2024-09-13 08:59:00,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:59:00,833 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:00,833 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:00,845 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-09-13 08:59:01,033 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-13 08:59:01,034 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:01,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:01,034 INFO L85 PathProgramCache]: Analyzing trace with hash 47219324, now seen corresponding path program 95 times [2024-09-13 08:59:01,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:01,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601351564] [2024-09-13 08:59:01,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:01,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:01,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:01,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:01,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:01,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:01,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:59:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:01,475 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:01,475 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:01,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601351564] [2024-09-13 08:59:01,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601351564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:01,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646386943] [2024-09-13 08:59:01,476 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:59:01,476 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:01,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:01,477 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:01,478 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-13 08:59:01,577 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:59:01,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:01,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-13 08:59:01,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:01,960 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:01,961 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646386943] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:02,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:02,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 46 [2024-09-13 08:59:02,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788384652] [2024-09-13 08:59:02,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:02,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:59:02,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:02,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:59:02,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:59:02,088 INFO L87 Difference]: Start difference. First operand 1083 states and 1218 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:03,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:03,084 INFO L93 Difference]: Finished difference Result 1089 states and 1223 transitions. [2024-09-13 08:59:03,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:59:03,084 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:59:03,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:03,091 INFO L225 Difference]: With dead ends: 1089 [2024-09-13 08:59:03,091 INFO L226 Difference]: Without dead ends: 1063 [2024-09-13 08:59:03,102 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:59:03,102 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:03,102 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1613 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:59:03,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2024-09-13 08:59:03,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2024-09-13 08:59:03,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 952 states have (on average 1.138655462184874) internal successors, (1084), 1020 states have internal predecessors, (1084), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2024-09-13 08:59:03,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1196 transitions. [2024-09-13 08:59:03,620 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1196 transitions. Word has length 56 [2024-09-13 08:59:03,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:03,621 INFO L474 AbstractCegarLoop]: Abstraction has 1063 states and 1196 transitions. [2024-09-13 08:59:03,621 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:03,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:03,621 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1196 transitions. [2024-09-13 08:59:03,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:59:03,627 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:03,627 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:03,639 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-09-13 08:59:03,827 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:03,828 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:03,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:03,828 INFO L85 PathProgramCache]: Analyzing trace with hash 2023403059, now seen corresponding path program 96 times [2024-09-13 08:59:03,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:03,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495699215] [2024-09-13 08:59:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:03,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:03,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:03,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:03,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:03,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 08:59:03,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-13 08:59:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495699215] [2024-09-13 08:59:04,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495699215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527309896] [2024-09-13 08:59:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:59:04,133 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:04,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:04,134 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:04,135 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-13 08:59:04,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:59:04,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:04,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:59:04,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:04,535 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:59:04,536 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:05,065 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:59:05,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527309896] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:05,065 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:05,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-13 08:59:05,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923002876] [2024-09-13 08:59:05,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:05,065 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 08:59:05,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:05,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 08:59:05,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:59:05,066 INFO L87 Difference]: Start difference. First operand 1063 states and 1196 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:06,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:06,279 INFO L93 Difference]: Finished difference Result 1143 states and 1298 transitions. [2024-09-13 08:59:06,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 08:59:06,280 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-13 08:59:06,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:06,311 INFO L225 Difference]: With dead ends: 1143 [2024-09-13 08:59:06,311 INFO L226 Difference]: Without dead ends: 1125 [2024-09-13 08:59:06,322 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 08:59:06,323 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:06,323 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 879 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:59:06,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-09-13 08:59:06,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1121. [2024-09-13 08:59:06,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 977 states have (on average 1.1340839303991812) internal successors, (1108), 1067 states have internal predecessors, (1108), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-13 08:59:06,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1264 transitions. [2024-09-13 08:59:06,847 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1264 transitions. Word has length 56 [2024-09-13 08:59:06,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:06,847 INFO L474 AbstractCegarLoop]: Abstraction has 1121 states and 1264 transitions. [2024-09-13 08:59:06,847 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:06,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:06,847 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1264 transitions. [2024-09-13 08:59:06,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:59:06,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:06,855 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:06,868 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-09-13 08:59:07,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-13 08:59:07,056 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:07,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:07,056 INFO L85 PathProgramCache]: Analyzing trace with hash 2053990524, now seen corresponding path program 97 times [2024-09-13 08:59:07,056 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:07,056 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747312334] [2024-09-13 08:59:07,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:07,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:07,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:07,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:07,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:07,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:59:07,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:07,427 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:07,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:07,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747312334] [2024-09-13 08:59:07,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747312334] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:07,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287992048] [2024-09-13 08:59:07,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:59:07,428 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:07,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:07,428 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:07,429 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-13 08:59:07,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:07,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:59:07,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:07,874 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:07,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:07,986 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:07,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287992048] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:07,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:07,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-09-13 08:59:07,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112710488] [2024-09-13 08:59:07,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:07,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-13 08:59:07,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:07,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-13 08:59:07,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2024-09-13 08:59:07,987 INFO L87 Difference]: Start difference. First operand 1121 states and 1264 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:08,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:08,905 INFO L93 Difference]: Finished difference Result 1137 states and 1284 transitions. [2024-09-13 08:59:08,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:59:08,906 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-13 08:59:08,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:08,919 INFO L225 Difference]: With dead ends: 1137 [2024-09-13 08:59:08,919 INFO L226 Difference]: Without dead ends: 1119 [2024-09-13 08:59:08,931 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2024-09-13 08:59:08,931 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:08,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1130 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:59:08,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-09-13 08:59:09,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1115. [2024-09-13 08:59:09,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 971 states have (on average 1.1359423274974254) internal successors, (1103), 1061 states have internal predecessors, (1103), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-13 08:59:09,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1259 transitions. [2024-09-13 08:59:09,643 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1259 transitions. Word has length 56 [2024-09-13 08:59:09,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:09,643 INFO L474 AbstractCegarLoop]: Abstraction has 1115 states and 1259 transitions. [2024-09-13 08:59:09,643 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:09,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:09,644 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1259 transitions. [2024-09-13 08:59:09,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-13 08:59:09,655 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:09,655 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:09,666 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2024-09-13 08:59:09,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-09-13 08:59:09,855 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:09,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:09,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1507543379, now seen corresponding path program 98 times [2024-09-13 08:59:09,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:09,856 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164957901] [2024-09-13 08:59:09,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:09,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:09,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:09,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:09,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:10,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:10,209 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-13 08:59:10,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:10,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164957901] [2024-09-13 08:59:10,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164957901] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:10,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206602329] [2024-09-13 08:59:10,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:59:10,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:10,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:10,211 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:10,211 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-13 08:59:10,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:59:10,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:10,298 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-13 08:59:10,299 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:10,606 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:59:10,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:11,124 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-13 08:59:11,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206602329] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:11,124 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:11,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-13 08:59:11,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129058909] [2024-09-13 08:59:11,125 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:11,125 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 08:59:11,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:11,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 08:59:11,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 08:59:11,125 INFO L87 Difference]: Start difference. First operand 1115 states and 1259 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:12,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:12,331 INFO L93 Difference]: Finished difference Result 1127 states and 1270 transitions. [2024-09-13 08:59:12,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-13 08:59:12,332 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-13 08:59:12,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:12,338 INFO L225 Difference]: With dead ends: 1127 [2024-09-13 08:59:12,338 INFO L226 Difference]: Without dead ends: 1101 [2024-09-13 08:59:12,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-13 08:59:12,349 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:12,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 787 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:59:12,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-13 08:59:12,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2024-09-13 08:59:12,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 955 states have (on average 1.1361256544502618) internal successors, (1085), 1045 states have internal predecessors, (1085), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2024-09-13 08:59:12,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1231 transitions. [2024-09-13 08:59:12,864 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1231 transitions. Word has length 56 [2024-09-13 08:59:12,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:12,864 INFO L474 AbstractCegarLoop]: Abstraction has 1099 states and 1231 transitions. [2024-09-13 08:59:12,864 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:12,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:12,864 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1231 transitions. [2024-09-13 08:59:12,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 08:59:12,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:12,872 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:12,884 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-09-13 08:59:13,072 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-09-13 08:59:13,073 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:13,073 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:13,073 INFO L85 PathProgramCache]: Analyzing trace with hash 697142747, now seen corresponding path program 99 times [2024-09-13 08:59:13,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:13,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650666133] [2024-09-13 08:59:13,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:13,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:13,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:13,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:13,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:13,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:13,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:13,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:59:13,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:13,620 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:13,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:13,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650666133] [2024-09-13 08:59:13,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650666133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:13,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473422411] [2024-09-13 08:59:13,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:59:13,621 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:13,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:13,622 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:13,622 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-13 08:59:13,715 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-13 08:59:13,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:13,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:59:13,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:14,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:15,837 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:15,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473422411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:15,837 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:15,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-13 08:59:15,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173705184] [2024-09-13 08:59:15,838 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:15,838 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-13 08:59:15,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:15,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-13 08:59:15,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-13 08:59:15,839 INFO L87 Difference]: Start difference. First operand 1099 states and 1231 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:18,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:18,664 INFO L93 Difference]: Finished difference Result 1231 states and 1388 transitions. [2024-09-13 08:59:18,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-13 08:59:18,664 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-13 08:59:18,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:18,688 INFO L225 Difference]: With dead ends: 1231 [2024-09-13 08:59:18,689 INFO L226 Difference]: Without dead ends: 1218 [2024-09-13 08:59:18,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-13 08:59:18,703 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:18,703 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1268 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:59:18,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-13 08:59:19,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1210. [2024-09-13 08:59:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1051 states have (on average 1.1351094196003806) internal successors, (1193), 1151 states have internal predecessors, (1193), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2024-09-13 08:59:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1359 transitions. [2024-09-13 08:59:19,342 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1359 transitions. Word has length 57 [2024-09-13 08:59:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:19,343 INFO L474 AbstractCegarLoop]: Abstraction has 1210 states and 1359 transitions. [2024-09-13 08:59:19,343 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:19,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:19,343 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1359 transitions. [2024-09-13 08:59:19,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 08:59:19,351 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:19,351 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:19,363 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:19,552 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-13 08:59:19,552 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:19,552 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:19,552 INFO L85 PathProgramCache]: Analyzing trace with hash -1635153294, now seen corresponding path program 100 times [2024-09-13 08:59:19,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:19,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501358554] [2024-09-13 08:59:19,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:19,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:19,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:19,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:19,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:19,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:19,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:19,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:19,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:20,109 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:20,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501358554] [2024-09-13 08:59:20,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501358554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:20,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211538369] [2024-09-13 08:59:20,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:59:20,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:20,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:20,111 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:20,111 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-13 08:59:20,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:59:20,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:20,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 08:59:20,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:20,974 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:20,975 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:22,261 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:22,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211538369] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:22,261 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:22,261 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-13 08:59:22,261 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865028555] [2024-09-13 08:59:22,261 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:22,261 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-13 08:59:22,262 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:22,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-13 08:59:22,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-13 08:59:22,263 INFO L87 Difference]: Start difference. First operand 1210 states and 1359 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:25,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:25,029 INFO L93 Difference]: Finished difference Result 1224 states and 1373 transitions. [2024-09-13 08:59:25,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-13 08:59:25,030 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-13 08:59:25,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:25,038 INFO L225 Difference]: With dead ends: 1224 [2024-09-13 08:59:25,038 INFO L226 Difference]: Without dead ends: 1213 [2024-09-13 08:59:25,051 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-13 08:59:25,051 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:25,051 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1505 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:59:25,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2024-09-13 08:59:25,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1211. [2024-09-13 08:59:25,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1052 states have (on average 1.1349809885931559) internal successors, (1194), 1152 states have internal predecessors, (1194), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-09-13 08:59:25,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1354 transitions. [2024-09-13 08:59:25,707 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1354 transitions. Word has length 57 [2024-09-13 08:59:25,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:25,707 INFO L474 AbstractCegarLoop]: Abstraction has 1211 states and 1354 transitions. [2024-09-13 08:59:25,707 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:25,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:25,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1354 transitions. [2024-09-13 08:59:25,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 08:59:25,717 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:25,717 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:25,730 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:25,918 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:25,918 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:25,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:25,918 INFO L85 PathProgramCache]: Analyzing trace with hash -201882063, now seen corresponding path program 101 times [2024-09-13 08:59:25,918 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:25,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007933279] [2024-09-13 08:59:25,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:25,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:25,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:25,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:25,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:25,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:25,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:25,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:26,049 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:26,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007933279] [2024-09-13 08:59:26,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007933279] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:26,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433174867] [2024-09-13 08:59:26,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:59:26,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:26,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:26,051 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:26,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-13 08:59:26,145 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 08:59:26,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:26,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:59:26,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:26,222 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:26,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433174867] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:26,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-13 08:59:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126752616] [2024-09-13 08:59:26,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:26,297 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:59:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:59:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:59:26,298 INFO L87 Difference]: Start difference. First operand 1211 states and 1354 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:59:27,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:27,073 INFO L93 Difference]: Finished difference Result 1250 states and 1403 transitions. [2024-09-13 08:59:27,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 08:59:27,073 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-09-13 08:59:27,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:27,081 INFO L225 Difference]: With dead ends: 1250 [2024-09-13 08:59:27,081 INFO L226 Difference]: Without dead ends: 1218 [2024-09-13 08:59:27,095 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:59:27,095 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:27,095 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:59:27,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-13 08:59:27,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1208. [2024-09-13 08:59:27,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1055 states have (on average 1.1308056872037915) internal successors, (1193), 1151 states have internal predecessors, (1193), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-13 08:59:27,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1345 transitions. [2024-09-13 08:59:27,744 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1345 transitions. Word has length 57 [2024-09-13 08:59:27,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:27,744 INFO L474 AbstractCegarLoop]: Abstraction has 1208 states and 1345 transitions. [2024-09-13 08:59:27,744 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 08:59:27,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:27,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1345 transitions. [2024-09-13 08:59:27,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-13 08:59:27,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:27,755 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:27,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:27,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:27,955 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:27,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:27,956 INFO L85 PathProgramCache]: Analyzing trace with hash -561571686, now seen corresponding path program 102 times [2024-09-13 08:59:27,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:27,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890258071] [2024-09-13 08:59:27,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:27,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:27,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:27,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:27,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:27,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:27,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-13 08:59:28,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:28,084 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:28,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890258071] [2024-09-13 08:59:28,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890258071] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:28,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145642933] [2024-09-13 08:59:28,084 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:59:28,084 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:28,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:28,085 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:28,086 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-13 08:59:28,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 08:59:28,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:28,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-13 08:59:28,181 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:28,256 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:28,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:28,331 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 08:59:28,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145642933] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:28,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:28,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-13 08:59:28,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644996109] [2024-09-13 08:59:28,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:28,332 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-13 08:59:28,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:28,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-13 08:59:28,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-13 08:59:28,333 INFO L87 Difference]: Start difference. First operand 1208 states and 1345 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:29,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:29,163 INFO L93 Difference]: Finished difference Result 1834 states and 2016 transitions. [2024-09-13 08:59:29,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-13 08:59:29,163 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-09-13 08:59:29,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:29,199 INFO L225 Difference]: With dead ends: 1834 [2024-09-13 08:59:29,199 INFO L226 Difference]: Without dead ends: 1221 [2024-09-13 08:59:29,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-13 08:59:29,216 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:29,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 08:59:29,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-13 08:59:29,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-13 08:59:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-13 08:59:29,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1358 transitions. [2024-09-13 08:59:29,821 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1358 transitions. Word has length 57 [2024-09-13 08:59:29,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:29,821 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1358 transitions. [2024-09-13 08:59:29,821 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:29,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:29,821 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1358 transitions. [2024-09-13 08:59:29,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:29,830 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:29,830 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:29,842 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-09-13 08:59:30,030 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-13 08:59:30,031 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:30,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:30,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1902474405, now seen corresponding path program 103 times [2024-09-13 08:59:30,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:30,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144956465] [2024-09-13 08:59:30,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:30,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:30,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:30,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,694 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:59:30,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144956465] [2024-09-13 08:59:30,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144956465] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:30,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260973349] [2024-09-13 08:59:30,695 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:59:30,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:30,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:30,696 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:30,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-13 08:59:30,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:30,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-13 08:59:30,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:30,968 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:59:30,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:31,115 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 08:59:31,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [260973349] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:31,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:31,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 48 [2024-09-13 08:59:31,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130853715] [2024-09-13 08:59:31,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:31,115 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:31,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:31,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:31,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2153, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:31,116 INFO L87 Difference]: Start difference. First operand 1221 states and 1358 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:32,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:32,712 INFO L93 Difference]: Finished difference Result 1357 states and 1511 transitions. [2024-09-13 08:59:32,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-13 08:59:32,713 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:32,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:32,725 INFO L225 Difference]: With dead ends: 1357 [2024-09-13 08:59:32,725 INFO L226 Difference]: Without dead ends: 1351 [2024-09-13 08:59:32,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:32,739 INFO L434 NwaCegarLoop]: 123 mSDtfsCounter, 137 mSDsluCounter, 5054 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:32,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 5177 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:59:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2024-09-13 08:59:33,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1235. [2024-09-13 08:59:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1079 states have (on average 1.1297497683039852) internal successors, (1219), 1177 states have internal predecessors, (1219), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2024-09-13 08:59:33,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1375 transitions. [2024-09-13 08:59:33,406 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1375 transitions. Word has length 58 [2024-09-13 08:59:33,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:33,406 INFO L474 AbstractCegarLoop]: Abstraction has 1235 states and 1375 transitions. [2024-09-13 08:59:33,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:33,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:33,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1375 transitions. [2024-09-13 08:59:33,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:33,415 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:33,416 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:33,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-09-13 08:59:33,616 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:33,616 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:33,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:33,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1757191105, now seen corresponding path program 104 times [2024-09-13 08:59:33,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:33,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293478323] [2024-09-13 08:59:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:33,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:33,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:33,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:33,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:33,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:34,155 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:34,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293478323] [2024-09-13 08:59:34,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293478323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:34,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [133211504] [2024-09-13 08:59:34,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:59:34,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:34,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:34,157 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:34,157 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-13 08:59:34,255 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:59:34,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:34,257 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-13 08:59:34,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:34,467 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:34,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 08:59:34,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [133211504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:34,611 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:34,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 48 [2024-09-13 08:59:34,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44468513] [2024-09-13 08:59:34,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:34,612 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:34,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:34,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:34,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2149, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:34,613 INFO L87 Difference]: Start difference. First operand 1235 states and 1375 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:36,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:36,134 INFO L93 Difference]: Finished difference Result 1241 states and 1380 transitions. [2024-09-13 08:59:36,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 08:59:36,134 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:36,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:36,141 INFO L225 Difference]: With dead ends: 1241 [2024-09-13 08:59:36,141 INFO L226 Difference]: Without dead ends: 1221 [2024-09-13 08:59:36,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:36,154 INFO L434 NwaCegarLoop]: 111 mSDtfsCounter, 116 mSDsluCounter, 4707 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:36,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4818 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 08:59:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-13 08:59:36,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-13 08:59:36,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2024-09-13 08:59:36,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1359 transitions. [2024-09-13 08:59:36,770 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1359 transitions. Word has length 58 [2024-09-13 08:59:36,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:36,770 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1359 transitions. [2024-09-13 08:59:36,770 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:36,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:36,770 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1359 transitions. [2024-09-13 08:59:36,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:36,779 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:36,780 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:36,793 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:36,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-13 08:59:36,980 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:36,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:36,980 INFO L85 PathProgramCache]: Analyzing trace with hash -711669595, now seen corresponding path program 105 times [2024-09-13 08:59:36,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:36,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424532406] [2024-09-13 08:59:36,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:36,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:36,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:37,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:37,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:37,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:37,540 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:59:37,540 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424532406] [2024-09-13 08:59:37,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424532406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:37,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1931696185] [2024-09-13 08:59:37,540 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 08:59:37,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:37,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:37,541 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:37,542 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-13 08:59:37,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-13 08:59:37,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:37,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 08:59:37,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:59:37,898 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:38,042 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 08:59:38,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1931696185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:38,042 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:38,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 48 [2024-09-13 08:59:38,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [277827132] [2024-09-13 08:59:38,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:38,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:38,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:38,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2145, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:38,043 INFO L87 Difference]: Start difference. First operand 1221 states and 1359 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:39,356 INFO L93 Difference]: Finished difference Result 1227 states and 1364 transitions. [2024-09-13 08:59:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-13 08:59:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:39,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:39,364 INFO L225 Difference]: With dead ends: 1227 [2024-09-13 08:59:39,364 INFO L226 Difference]: Without dead ends: 1205 [2024-09-13 08:59:39,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=2725, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:39,381 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 97 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:39,381 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3662 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 08:59:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2024-09-13 08:59:40,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2024-09-13 08:59:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1055 states have (on average 1.128909952606635) internal successors, (1191), 1149 states have internal predecessors, (1191), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2024-09-13 08:59:40,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1341 transitions. [2024-09-13 08:59:40,043 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1341 transitions. Word has length 58 [2024-09-13 08:59:40,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:40,043 INFO L474 AbstractCegarLoop]: Abstraction has 1205 states and 1341 transitions. [2024-09-13 08:59:40,043 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:40,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:40,044 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1341 transitions. [2024-09-13 08:59:40,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:40,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:40,052 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:40,064 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-09-13 08:59:40,252 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-13 08:59:40,252 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:40,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:40,253 INFO L85 PathProgramCache]: Analyzing trace with hash -148391999, now seen corresponding path program 106 times [2024-09-13 08:59:40,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:40,253 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844515581] [2024-09-13 08:59:40,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:40,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:40,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:40,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:40,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:40,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:40,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:40,724 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:59:40,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844515581] [2024-09-13 08:59:40,724 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844515581] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:40,724 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000308535] [2024-09-13 08:59:40,724 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 08:59:40,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:40,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:40,725 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:40,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-13 08:59:40,824 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 08:59:40,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:40,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 08:59:40,827 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:41,126 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:59:41,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 08:59:41,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000308535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:41,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:41,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 48 [2024-09-13 08:59:41,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388467879] [2024-09-13 08:59:41,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:41,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:41,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:41,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:41,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:41,250 INFO L87 Difference]: Start difference. First operand 1205 states and 1341 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:42,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:42,461 INFO L93 Difference]: Finished difference Result 1211 states and 1346 transitions. [2024-09-13 08:59:42,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 08:59:42,461 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:42,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:42,467 INFO L225 Difference]: With dead ends: 1211 [2024-09-13 08:59:42,467 INFO L226 Difference]: Without dead ends: 1187 [2024-09-13 08:59:42,493 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:42,493 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:42,493 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2658 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 08:59:42,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2024-09-13 08:59:43,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2024-09-13 08:59:43,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1040 states have (on average 1.1288461538461538) internal successors, (1174), 1132 states have internal predecessors, (1174), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2024-09-13 08:59:43,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1321 transitions. [2024-09-13 08:59:43,097 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1321 transitions. Word has length 58 [2024-09-13 08:59:43,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:43,097 INFO L474 AbstractCegarLoop]: Abstraction has 1187 states and 1321 transitions. [2024-09-13 08:59:43,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:43,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:43,098 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1321 transitions. [2024-09-13 08:59:43,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:43,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:43,106 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:43,119 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-09-13 08:59:43,310 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:43,311 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:43,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:43,311 INFO L85 PathProgramCache]: Analyzing trace with hash 1511996581, now seen corresponding path program 107 times [2024-09-13 08:59:43,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:43,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055801577] [2024-09-13 08:59:43,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:43,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:43,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:43,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:43,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:43,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:43,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:43,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:43,771 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:43,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055801577] [2024-09-13 08:59:43,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2055801577] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:43,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1733460580] [2024-09-13 08:59:43,772 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 08:59:43,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:43,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:43,773 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:43,774 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-13 08:59:43,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 08:59:43,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:43,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 08:59:43,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:44,270 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:44,270 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:44,399 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 08:59:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1733460580] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:44,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 48 [2024-09-13 08:59:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644426943] [2024-09-13 08:59:44,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:44,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:44,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:44,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:44,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:44,401 INFO L87 Difference]: Start difference. First operand 1187 states and 1321 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:45,490 INFO L93 Difference]: Finished difference Result 1193 states and 1326 transitions. [2024-09-13 08:59:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 08:59:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:45,497 INFO L225 Difference]: With dead ends: 1193 [2024-09-13 08:59:45,497 INFO L226 Difference]: Without dead ends: 1167 [2024-09-13 08:59:45,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=2717, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:45,509 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:45,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2279 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 08:59:45,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2024-09-13 08:59:46,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2024-09-13 08:59:46,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1113 states have internal predecessors, (1155), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2024-09-13 08:59:46,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1299 transitions. [2024-09-13 08:59:46,147 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1299 transitions. Word has length 58 [2024-09-13 08:59:46,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:46,148 INFO L474 AbstractCegarLoop]: Abstraction has 1167 states and 1299 transitions. [2024-09-13 08:59:46,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:46,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:46,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1299 transitions. [2024-09-13 08:59:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:46,156 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:46,156 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:46,168 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:46,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:46,356 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:46,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:46,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1143491647, now seen corresponding path program 108 times [2024-09-13 08:59:46,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:46,357 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185876733] [2024-09-13 08:59:46,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:46,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:46,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:46,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:46,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:46,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:46,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:46,765 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:46,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185876733] [2024-09-13 08:59:46,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185876733] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:46,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607942903] [2024-09-13 08:59:46,765 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 08:59:46,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:46,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:46,766 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:46,767 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-13 08:59:46,866 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-13 08:59:46,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:46,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 08:59:46,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:47,231 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:47,231 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:47,349 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 08:59:47,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [607942903] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:47,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:47,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 48 [2024-09-13 08:59:47,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338465775] [2024-09-13 08:59:47,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:47,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:47,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:47,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:47,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2133, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:47,350 INFO L87 Difference]: Start difference. First operand 1167 states and 1299 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:48,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:48,391 INFO L93 Difference]: Finished difference Result 1173 states and 1304 transitions. [2024-09-13 08:59:48,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 08:59:48,391 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:48,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:48,397 INFO L225 Difference]: With dead ends: 1173 [2024-09-13 08:59:48,397 INFO L226 Difference]: Without dead ends: 1145 [2024-09-13 08:59:48,407 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:48,407 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:48,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1491 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:59:48,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2024-09-13 08:59:48,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1145. [2024-09-13 08:59:48,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1004 states have (on average 1.1294820717131475) internal successors, (1134), 1092 states have internal predecessors, (1134), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2024-09-13 08:59:48,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1275 transitions. [2024-09-13 08:59:48,982 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1275 transitions. Word has length 58 [2024-09-13 08:59:48,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:48,982 INFO L474 AbstractCegarLoop]: Abstraction has 1145 states and 1275 transitions. [2024-09-13 08:59:48,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:48,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:48,983 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1275 transitions. [2024-09-13 08:59:48,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-13 08:59:48,990 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:48,990 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:49,002 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2024-09-13 08:59:49,191 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2024-09-13 08:59:49,191 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:49,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:49,191 INFO L85 PathProgramCache]: Analyzing trace with hash -834350939, now seen corresponding path program 109 times [2024-09-13 08:59:49,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:49,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969923318] [2024-09-13 08:59:49,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:49,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:49,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:49,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:49,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:49,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:49,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:49,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 08:59:49,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969923318] [2024-09-13 08:59:49,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969923318] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:49,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628984995] [2024-09-13 08:59:49,577 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 08:59:49,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:49,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:49,578 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:49,579 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-13 08:59:49,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:49,678 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-13 08:59:49,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:50,068 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 08:59:50,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 08:59:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628984995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:50,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2024-09-13 08:59:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027594267] [2024-09-13 08:59:50,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:50,181 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-13 08:59:50,181 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-13 08:59:50,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2024-09-13 08:59:50,181 INFO L87 Difference]: Start difference. First operand 1145 states and 1275 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:51,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:51,401 INFO L93 Difference]: Finished difference Result 1161 states and 1294 transitions. [2024-09-13 08:59:51,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-13 08:59:51,401 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-13 08:59:51,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:51,413 INFO L225 Difference]: With dead ends: 1161 [2024-09-13 08:59:51,413 INFO L226 Difference]: Without dead ends: 1155 [2024-09-13 08:59:51,424 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2024-09-13 08:59:51,424 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:51,424 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 971 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 08:59:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2024-09-13 08:59:51,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1153. [2024-09-13 08:59:51,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1009 states have (on average 1.1308225966303271) internal successors, (1141), 1099 states have internal predecessors, (1141), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2024-09-13 08:59:51,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1286 transitions. [2024-09-13 08:59:51,999 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1286 transitions. Word has length 58 [2024-09-13 08:59:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:51,999 INFO L474 AbstractCegarLoop]: Abstraction has 1153 states and 1286 transitions. [2024-09-13 08:59:51,999 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 08:59:51,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:51,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1286 transitions. [2024-09-13 08:59:52,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 08:59:52,007 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:52,007 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:52,019 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2024-09-13 08:59:52,207 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-09-13 08:59:52,207 INFO L399 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:52,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:52,208 INFO L85 PathProgramCache]: Analyzing trace with hash -100216622, now seen corresponding path program 110 times [2024-09-13 08:59:52,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:52,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347663564] [2024-09-13 08:59:52,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:52,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:52,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:52,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:52,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:52,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:52,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:52,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 08:59:52,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:52,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 08:59:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347663564] [2024-09-13 08:59:52,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347663564] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 08:59:52,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369528034] [2024-09-13 08:59:52,807 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 08:59:52,807 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:52,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 08:59:52,808 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 08:59:52,808 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-09-13 08:59:52,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 08:59:52,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 08:59:52,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-13 08:59:52,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 08:59:53,847 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:53,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 08:59:55,332 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 08:59:55,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369528034] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 08:59:55,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 08:59:55,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 90 [2024-09-13 08:59:55,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944481590] [2024-09-13 08:59:55,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 08:59:55,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-09-13 08:59:55,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 08:59:55,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-09-13 08:59:55,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=7706, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 08:59:55,334 INFO L87 Difference]: Start difference. First operand 1153 states and 1286 transitions. Second operand has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:58,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 08:59:58,588 INFO L93 Difference]: Finished difference Result 1287 states and 1445 transitions. [2024-09-13 08:59:58,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-13 08:59:58,588 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-13 08:59:58,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 08:59:58,616 INFO L225 Difference]: With dead ends: 1287 [2024-09-13 08:59:58,617 INFO L226 Difference]: Without dead ends: 1274 [2024-09-13 08:59:58,629 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=598, Invalid=12512, Unknown=0, NotChecked=0, Total=13110 [2024-09-13 08:59:58,630 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 08:59:58,630 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1366 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 08:59:58,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2024-09-13 08:59:59,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1266. [2024-09-13 08:59:59,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1107 states have (on average 1.1300813008130082) internal successors, (1251), 1207 states have internal predecessors, (1251), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2024-09-13 08:59:59,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1416 transitions. [2024-09-13 08:59:59,289 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1416 transitions. Word has length 59 [2024-09-13 08:59:59,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 08:59:59,289 INFO L474 AbstractCegarLoop]: Abstraction has 1266 states and 1416 transitions. [2024-09-13 08:59:59,289 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 08:59:59,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:59,290 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1416 transitions. [2024-09-13 08:59:59,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 08:59:59,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 08:59:59,299 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 08:59:59,311 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2024-09-13 08:59:59,499 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 08:59:59,499 INFO L399 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 08:59:59,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 08:59:59,500 INFO L85 PathProgramCache]: Analyzing trace with hash 613050139, now seen corresponding path program 111 times [2024-09-13 08:59:59,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 08:59:59,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671971101] [2024-09-13 08:59:59,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 08:59:59,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 08:59:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:59,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 08:59:59,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:59,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 08:59:59,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 08:59:59,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 08:59:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:00:00,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:00,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671971101] [2024-09-13 09:00:00,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671971101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:00,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857544025] [2024-09-13 09:00:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:00:00,122 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:00,122 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:00,123 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:00,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-09-13 09:00:00,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-13 09:00:00,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:00,230 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-13 09:00:00,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:01,152 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:00:01,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:02,819 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-13 09:00:02,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [857544025] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:02,819 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:02,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 90 [2024-09-13 09:00:02,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287289501] [2024-09-13 09:00:02,819 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:02,819 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-09-13 09:00:02,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:02,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-09-13 09:00:02,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=7706, Unknown=0, NotChecked=0, Total=8010 [2024-09-13 09:00:02,821 INFO L87 Difference]: Start difference. First operand 1266 states and 1416 transitions. Second operand has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:00:06,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:06,140 INFO L93 Difference]: Finished difference Result 1280 states and 1430 transitions. [2024-09-13 09:00:06,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-13 09:00:06,141 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-13 09:00:06,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:06,148 INFO L225 Difference]: With dead ends: 1280 [2024-09-13 09:00:06,149 INFO L226 Difference]: Without dead ends: 1269 [2024-09-13 09:00:06,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=598, Invalid=12512, Unknown=0, NotChecked=0, Total=13110 [2024-09-13 09:00:06,163 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:06,163 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1502 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-13 09:00:06,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2024-09-13 09:00:06,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1267. [2024-09-13 09:00:06,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1108 states have (on average 1.1299638989169676) internal successors, (1252), 1208 states have internal predecessors, (1252), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-13 09:00:06,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1411 transitions. [2024-09-13 09:00:06,920 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1411 transitions. Word has length 59 [2024-09-13 09:00:06,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:06,920 INFO L474 AbstractCegarLoop]: Abstraction has 1267 states and 1411 transitions. [2024-09-13 09:00:06,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:00:06,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:06,920 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1411 transitions. [2024-09-13 09:00:06,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 09:00:06,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:06,930 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:06,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-09-13 09:00:07,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:07,131 INFO L399 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:07,131 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:07,131 INFO L85 PathProgramCache]: Analyzing trace with hash -700573190, now seen corresponding path program 112 times [2024-09-13 09:00:07,131 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:07,131 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244894064] [2024-09-13 09:00:07,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:07,131 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:07,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:07,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:07,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:07,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:07,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:07,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:07,306 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:07,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244894064] [2024-09-13 09:00:07,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244894064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:07,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627224200] [2024-09-13 09:00:07,306 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:00:07,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:07,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:07,307 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:07,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-09-13 09:00:07,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:00:07,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:07,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 09:00:07,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:07,516 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:07,517 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:07,596 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627224200] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:07,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:07,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2024-09-13 09:00:07,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090231116] [2024-09-13 09:00:07,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:07,596 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 09:00:07,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:07,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 09:00:07,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:00:07,597 INFO L87 Difference]: Start difference. First operand 1267 states and 1411 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:08,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:08,668 INFO L93 Difference]: Finished difference Result 2061 states and 2283 transitions. [2024-09-13 09:00:08,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 09:00:08,669 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-09-13 09:00:08,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:08,720 INFO L225 Difference]: With dead ends: 2061 [2024-09-13 09:00:08,720 INFO L226 Difference]: Without dead ends: 1409 [2024-09-13 09:00:08,737 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=2002, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 09:00:08,737 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:08,737 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 303 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:00:08,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2024-09-13 09:00:09,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2024-09-13 09:00:09,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1250 states have (on average 1.1272) internal successors, (1409), 1350 states have internal predecessors, (1409), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-13 09:00:09,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1568 transitions. [2024-09-13 09:00:09,498 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1568 transitions. Word has length 59 [2024-09-13 09:00:09,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:09,498 INFO L474 AbstractCegarLoop]: Abstraction has 1409 states and 1568 transitions. [2024-09-13 09:00:09,499 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:09,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:09,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1568 transitions. [2024-09-13 09:00:09,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-13 09:00:09,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:09,509 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:09,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2024-09-13 09:00:09,709 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2024-09-13 09:00:09,709 INFO L399 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:09,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:09,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1033950385, now seen corresponding path program 113 times [2024-09-13 09:00:09,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:09,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061826628] [2024-09-13 09:00:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:09,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:09,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:09,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:09,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:09,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:09,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 09:00:09,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:09,850 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:09,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061826628] [2024-09-13 09:00:09,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061826628] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:09,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272618187] [2024-09-13 09:00:09,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:00:09,850 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:09,850 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:09,851 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:09,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-09-13 09:00:09,952 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-13 09:00:09,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:09,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-13 09:00:09,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:10,086 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:10,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:10,168 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-13 09:00:10,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272618187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:10,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:10,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2024-09-13 09:00:10,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192508792] [2024-09-13 09:00:10,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:10,169 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-13 09:00:10,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:10,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-13 09:00:10,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2024-09-13 09:00:10,170 INFO L87 Difference]: Start difference. First operand 1409 states and 1568 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 09:00:11,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:11,321 INFO L93 Difference]: Finished difference Result 1599 states and 1801 transitions. [2024-09-13 09:00:11,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 09:00:11,322 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-09-13 09:00:11,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:11,332 INFO L225 Difference]: With dead ends: 1599 [2024-09-13 09:00:11,332 INFO L226 Difference]: Without dead ends: 1551 [2024-09-13 09:00:11,350 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=2002, Unknown=0, NotChecked=0, Total=2756 [2024-09-13 09:00:11,351 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:11,351 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 243 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 09:00:11,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-09-13 09:00:12,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2024-09-13 09:00:12,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1392 states have (on average 1.125) internal successors, (1566), 1492 states have internal predecessors, (1566), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-13 09:00:12,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1725 transitions. [2024-09-13 09:00:12,254 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1725 transitions. Word has length 59 [2024-09-13 09:00:12,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:12,255 INFO L474 AbstractCegarLoop]: Abstraction has 1551 states and 1725 transitions. [2024-09-13 09:00:12,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-13 09:00:12,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:12,255 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1725 transitions. [2024-09-13 09:00:12,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:12,267 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:12,267 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:12,279 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2024-09-13 09:00:12,467 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:12,467 INFO L399 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:12,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:12,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1417663204, now seen corresponding path program 114 times [2024-09-13 09:00:12,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:12,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038222066] [2024-09-13 09:00:12,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:12,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:12,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:12,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:12,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:12,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:12,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:12,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:12,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 09:00:13,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038222066] [2024-09-13 09:00:13,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038222066] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988799602] [2024-09-13 09:00:13,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:00:13,171 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:13,172 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:13,173 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-09-13 09:00:13,276 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-13 09:00:13,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:13,278 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-13 09:00:13,279 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:13,470 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 09:00:13,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:13,624 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-13 09:00:13,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988799602] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:13,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:13,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 50 [2024-09-13 09:00:13,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510122921] [2024-09-13 09:00:13,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:13,624 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:13,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:13,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:13,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2343, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:13,625 INFO L87 Difference]: Start difference. First operand 1551 states and 1725 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:15,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:15,735 INFO L93 Difference]: Finished difference Result 1707 states and 1900 transitions. [2024-09-13 09:00:15,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-13 09:00:15,735 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:15,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:15,753 INFO L225 Difference]: With dead ends: 1707 [2024-09-13 09:00:15,753 INFO L226 Difference]: Without dead ends: 1701 [2024-09-13 09:00:15,775 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=133, Invalid=2947, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:15,776 INFO L434 NwaCegarLoop]: 133 mSDtfsCounter, 147 mSDsluCounter, 5729 mSDsCounter, 0 mSdLazyCounter, 4293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5862 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:15,776 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 5862 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4293 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-13 09:00:15,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2024-09-13 09:00:16,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1565. [2024-09-13 09:00:16,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1403 states have (on average 1.1254454739843194) internal successors, (1579), 1505 states have internal predecessors, (1579), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2024-09-13 09:00:16,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1742 transitions. [2024-09-13 09:00:16,628 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1742 transitions. Word has length 60 [2024-09-13 09:00:16,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:16,629 INFO L474 AbstractCegarLoop]: Abstraction has 1565 states and 1742 transitions. [2024-09-13 09:00:16,629 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:16,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:16,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1742 transitions. [2024-09-13 09:00:16,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:16,642 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:16,642 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:16,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-09-13 09:00:16,843 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-09-13 09:00:16,843 INFO L399 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:16,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:16,843 INFO L85 PathProgramCache]: Analyzing trace with hash 1854930716, now seen corresponding path program 115 times [2024-09-13 09:00:16,843 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:16,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666361865] [2024-09-13 09:00:16,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:16,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:16,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:16,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:16,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:16,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:17,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:17,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:00:17,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666361865] [2024-09-13 09:00:17,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666361865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:17,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524123098] [2024-09-13 09:00:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:00:17,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:17,452 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:17,453 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:17,454 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-09-13 09:00:17,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:17,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-13 09:00:17,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:17,848 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:00:17,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:17,995 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-13 09:00:17,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524123098] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:17,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:17,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 50 [2024-09-13 09:00:17,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440129419] [2024-09-13 09:00:17,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:17,996 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:17,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:17,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:17,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2339, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:17,996 INFO L87 Difference]: Start difference. First operand 1565 states and 1742 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:19,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:19,756 INFO L93 Difference]: Finished difference Result 1571 states and 1747 transitions. [2024-09-13 09:00:19,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-13 09:00:19,756 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:19,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:19,766 INFO L225 Difference]: With dead ends: 1571 [2024-09-13 09:00:19,766 INFO L226 Difference]: Without dead ends: 1551 [2024-09-13 09:00:19,783 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=137, Invalid=2943, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:19,783 INFO L434 NwaCegarLoop]: 117 mSDtfsCounter, 126 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 5005 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:19,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 5005 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-13 09:00:19,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-09-13 09:00:20,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2024-09-13 09:00:20,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1392 states have (on average 1.125) internal successors, (1566), 1492 states have internal predecessors, (1566), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-09-13 09:00:20,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1726 transitions. [2024-09-13 09:00:20,684 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1726 transitions. Word has length 60 [2024-09-13 09:00:20,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:20,685 INFO L474 AbstractCegarLoop]: Abstraction has 1551 states and 1726 transitions. [2024-09-13 09:00:20,685 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:20,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:20,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1726 transitions. [2024-09-13 09:00:20,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:20,697 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:20,697 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:20,709 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-09-13 09:00:20,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-09-13 09:00:20,897 INFO L399 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:20,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:20,898 INFO L85 PathProgramCache]: Analyzing trace with hash -354179812, now seen corresponding path program 116 times [2024-09-13 09:00:20,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:20,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26110000] [2024-09-13 09:00:20,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:20,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:21,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:21,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:21,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:21,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:21,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:21,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:21,459 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:00:21,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26110000] [2024-09-13 09:00:21,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26110000] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:21,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356088205] [2024-09-13 09:00:21,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:00:21,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:21,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:21,460 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:21,461 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-09-13 09:00:21,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:00:21,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:21,566 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-13 09:00:21,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:21,837 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:00:21,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:21,977 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-13 09:00:21,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356088205] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:21,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:21,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 50 [2024-09-13 09:00:21,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467089983] [2024-09-13 09:00:21,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:21,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:21,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:21,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:21,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2335, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:21,979 INFO L87 Difference]: Start difference. First operand 1551 states and 1726 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:23,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:23,600 INFO L93 Difference]: Finished difference Result 1557 states and 1731 transitions. [2024-09-13 09:00:23,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-13 09:00:23,600 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:23,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:23,609 INFO L225 Difference]: With dead ends: 1557 [2024-09-13 09:00:23,609 INFO L226 Difference]: Without dead ends: 1535 [2024-09-13 09:00:23,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2939, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:23,625 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3798 mSDsCounter, 0 mSdLazyCounter, 3036 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:23,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3899 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3036 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 09:00:23,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2024-09-13 09:00:24,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2024-09-13 09:00:24,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1379 states have (on average 1.1247280638143582) internal successors, (1551), 1477 states have internal predecessors, (1551), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2024-09-13 09:00:24,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 1708 transitions. [2024-09-13 09:00:24,529 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 1708 transitions. Word has length 60 [2024-09-13 09:00:24,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:24,529 INFO L474 AbstractCegarLoop]: Abstraction has 1535 states and 1708 transitions. [2024-09-13 09:00:24,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:24,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:24,529 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 1708 transitions. [2024-09-13 09:00:24,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:24,540 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:24,541 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:24,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2024-09-13 09:00:24,741 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-09-13 09:00:24,741 INFO L399 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:24,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:24,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1382775012, now seen corresponding path program 117 times [2024-09-13 09:00:24,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:24,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803325637] [2024-09-13 09:00:24,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:24,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:24,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:24,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:24,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:24,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:24,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:25,258 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 09:00:25,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803325637] [2024-09-13 09:00:25,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803325637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:25,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145632746] [2024-09-13 09:00:25,258 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-13 09:00:25,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:25,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:25,259 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:25,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-09-13 09:00:25,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-13 09:00:25,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:25,366 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-13 09:00:25,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:25,676 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 09:00:25,676 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:25,807 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-13 09:00:25,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145632746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:25,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:25,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 50 [2024-09-13 09:00:25,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890310778] [2024-09-13 09:00:25,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:25,807 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:25,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:25,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:25,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2331, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:25,808 INFO L87 Difference]: Start difference. First operand 1535 states and 1708 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:27,286 INFO L93 Difference]: Finished difference Result 1541 states and 1713 transitions. [2024-09-13 09:00:27,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-13 09:00:27,286 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:27,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:27,296 INFO L225 Difference]: With dead ends: 1541 [2024-09-13 09:00:27,297 INFO L226 Difference]: Without dead ends: 1517 [2024-09-13 09:00:27,322 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:27,323 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 86 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:27,323 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3265 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 09:00:27,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2024-09-13 09:00:28,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1517. [2024-09-13 09:00:28,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1364 states have (on average 1.1246334310850439) internal successors, (1534), 1460 states have internal predecessors, (1534), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2024-09-13 09:00:28,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 1688 transitions. [2024-09-13 09:00:28,270 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 1688 transitions. Word has length 60 [2024-09-13 09:00:28,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:28,270 INFO L474 AbstractCegarLoop]: Abstraction has 1517 states and 1688 transitions. [2024-09-13 09:00:28,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:28,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:28,271 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 1688 transitions. [2024-09-13 09:00:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:28,282 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:28,283 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:28,295 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-09-13 09:00:28,483 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:28,483 INFO L399 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:28,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:28,484 INFO L85 PathProgramCache]: Analyzing trace with hash 1465326876, now seen corresponding path program 118 times [2024-09-13 09:00:28,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:28,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788976147] [2024-09-13 09:00:28,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:28,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:28,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:28,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:28,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:28,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:28,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:28,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 09:00:28,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:28,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788976147] [2024-09-13 09:00:28,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788976147] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:28,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100875475] [2024-09-13 09:00:28,986 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-13 09:00:28,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:28,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:28,987 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:28,988 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-09-13 09:00:29,091 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-13 09:00:29,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:29,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-13 09:00:29,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 09:00:29,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:29,569 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-13 09:00:29,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100875475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:29,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:29,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 50 [2024-09-13 09:00:29,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689858611] [2024-09-13 09:00:29,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:29,570 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:29,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:29,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:29,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2327, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:29,571 INFO L87 Difference]: Start difference. First operand 1517 states and 1688 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:31,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:31,016 INFO L93 Difference]: Finished difference Result 1523 states and 1693 transitions. [2024-09-13 09:00:31,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-13 09:00:31,017 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:31,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:31,027 INFO L225 Difference]: With dead ends: 1523 [2024-09-13 09:00:31,027 INFO L226 Difference]: Without dead ends: 1497 [2024-09-13 09:00:31,054 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:31,055 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:31,055 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2500 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-13 09:00:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2024-09-13 09:00:31,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1497. [2024-09-13 09:00:31,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1347 states have (on average 1.1247216035634744) internal successors, (1515), 1441 states have internal predecessors, (1515), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2024-09-13 09:00:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1666 transitions. [2024-09-13 09:00:31,930 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1666 transitions. Word has length 60 [2024-09-13 09:00:31,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:31,930 INFO L474 AbstractCegarLoop]: Abstraction has 1497 states and 1666 transitions. [2024-09-13 09:00:31,930 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:31,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:31,931 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1666 transitions. [2024-09-13 09:00:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:31,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:31,941 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:31,954 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2024-09-13 09:00:32,142 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2024-09-13 09:00:32,142 INFO L399 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:32,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:32,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1949757668, now seen corresponding path program 119 times [2024-09-13 09:00:32,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:32,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919749907] [2024-09-13 09:00:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:32,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:32,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:32,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:32,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:32,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:32,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:32,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:32,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:32,587 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 09:00:32,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919749907] [2024-09-13 09:00:32,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919749907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:32,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097627164] [2024-09-13 09:00:32,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-13 09:00:32,587 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:32,587 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:32,588 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:32,589 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-09-13 09:00:32,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-13 09:00:32,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:32,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-13 09:00:32,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:33,061 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 09:00:33,062 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:33,182 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-13 09:00:33,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097627164] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:33,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:33,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2024-09-13 09:00:33,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126212600] [2024-09-13 09:00:33,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:33,182 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:33,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:33,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:33,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:33,183 INFO L87 Difference]: Start difference. First operand 1497 states and 1666 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:34,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:34,542 INFO L93 Difference]: Finished difference Result 1503 states and 1671 transitions. [2024-09-13 09:00:34,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-13 09:00:34,542 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:34,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:34,551 INFO L225 Difference]: With dead ends: 1503 [2024-09-13 09:00:34,551 INFO L226 Difference]: Without dead ends: 1475 [2024-09-13 09:00:34,571 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=2927, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:34,571 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:34,571 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1842 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 09:00:34,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2024-09-13 09:00:35,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1475. [2024-09-13 09:00:35,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1328 states have (on average 1.125) internal successors, (1494), 1420 states have internal predecessors, (1494), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2024-09-13 09:00:35,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1642 transitions. [2024-09-13 09:00:35,384 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1642 transitions. Word has length 60 [2024-09-13 09:00:35,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:35,384 INFO L474 AbstractCegarLoop]: Abstraction has 1475 states and 1642 transitions. [2024-09-13 09:00:35,384 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:35,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:35,384 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1642 transitions. [2024-09-13 09:00:35,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:35,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:35,395 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:35,407 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-09-13 09:00:35,595 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-09-13 09:00:35,595 INFO L399 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:35,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:35,595 INFO L85 PathProgramCache]: Analyzing trace with hash 967836435, now seen corresponding path program 120 times [2024-09-13 09:00:35,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:35,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398256384] [2024-09-13 09:00:35,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:35,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:35,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:35,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:35,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:35,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:35,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-13 09:00:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:35,947 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 09:00:35,947 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:35,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398256384] [2024-09-13 09:00:35,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398256384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:35,947 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011500076] [2024-09-13 09:00:35,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-13 09:00:35,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:35,947 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:35,948 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:35,949 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-09-13 09:00:36,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-13 09:00:36,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:36,051 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:00:36,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:36,416 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 09:00:36,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:37,047 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 09:00:37,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011500076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:37,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:37,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-13 09:00:37,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698761817] [2024-09-13 09:00:37,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:37,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-13 09:00:37,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:37,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-13 09:00:37,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:37,049 INFO L87 Difference]: Start difference. First operand 1475 states and 1642 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:00:38,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:38,744 INFO L93 Difference]: Finished difference Result 1567 states and 1760 transitions. [2024-09-13 09:00:38,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-13 09:00:38,745 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-13 09:00:38,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:38,814 INFO L225 Difference]: With dead ends: 1567 [2024-09-13 09:00:38,814 INFO L226 Difference]: Without dead ends: 1548 [2024-09-13 09:00:38,833 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2024-09-13 09:00:38,834 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:38,834 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 799 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 09:00:38,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2024-09-13 09:00:39,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1544. [2024-09-13 09:00:39,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1358 states have (on average 1.1215022091310751) internal successors, (1523), 1476 states have internal predecessors, (1523), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2024-09-13 09:00:39,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1723 transitions. [2024-09-13 09:00:39,760 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1723 transitions. Word has length 60 [2024-09-13 09:00:39,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:39,760 INFO L474 AbstractCegarLoop]: Abstraction has 1544 states and 1723 transitions. [2024-09-13 09:00:39,760 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-13 09:00:39,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:39,760 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1723 transitions. [2024-09-13 09:00:39,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:39,773 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:39,773 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:39,786 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2024-09-13 09:00:39,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-09-13 09:00:39,974 INFO L399 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:39,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:39,974 INFO L85 PathProgramCache]: Analyzing trace with hash -1738894052, now seen corresponding path program 121 times [2024-09-13 09:00:39,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:39,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062952116] [2024-09-13 09:00:39,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:39,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:39,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:40,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:40,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:40,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:40,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-13 09:00:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:40,404 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 09:00:40,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062952116] [2024-09-13 09:00:40,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062952116] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:40,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715895508] [2024-09-13 09:00:40,404 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-13 09:00:40,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:40,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:40,405 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:40,406 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-09-13 09:00:40,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:40,510 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-13 09:00:40,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 09:00:40,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-13 09:00:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715895508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:41,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:41,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2024-09-13 09:00:41,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868631830] [2024-09-13 09:00:41,041 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:41,041 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-13 09:00:41,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:41,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-13 09:00:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2024-09-13 09:00:41,042 INFO L87 Difference]: Start difference. First operand 1544 states and 1723 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:42,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 09:00:42,274 INFO L93 Difference]: Finished difference Result 1560 states and 1743 transitions. [2024-09-13 09:00:42,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-13 09:00:42,274 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-13 09:00:42,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 09:00:42,291 INFO L225 Difference]: With dead ends: 1560 [2024-09-13 09:00:42,292 INFO L226 Difference]: Without dead ends: 1541 [2024-09-13 09:00:42,321 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=2923, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:42,321 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 09:00:42,322 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1069 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 09:00:42,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2024-09-13 09:00:43,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1537. [2024-09-13 09:00:43,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1351 states have (on average 1.1228719467061437) internal successors, (1517), 1469 states have internal predecessors, (1517), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2024-09-13 09:00:43,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1717 transitions. [2024-09-13 09:00:43,156 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1717 transitions. Word has length 60 [2024-09-13 09:00:43,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 09:00:43,156 INFO L474 AbstractCegarLoop]: Abstraction has 1537 states and 1717 transitions. [2024-09-13 09:00:43,156 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-13 09:00:43,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:43,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1717 transitions. [2024-09-13 09:00:43,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 09:00:43,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 09:00:43,169 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 09:00:43,182 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2024-09-13 09:00:43,369 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:43,370 INFO L399 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-13 09:00:43,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 09:00:43,370 INFO L85 PathProgramCache]: Analyzing trace with hash -919584205, now seen corresponding path program 122 times [2024-09-13 09:00:43,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 09:00:43,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369257063] [2024-09-13 09:00:43,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 09:00:43,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 09:00:43,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:43,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-13 09:00:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:43,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-13 09:00:43,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:43,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-13 09:00:43,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 09:00:43,894 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-13 09:00:43,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 09:00:43,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369257063] [2024-09-13 09:00:43,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369257063] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 09:00:43,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767044963] [2024-09-13 09:00:43,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 09:00:43,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 09:00:43,895 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 09:00:43,896 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 09:00:43,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-09-13 09:00:44,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 09:00:44,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 09:00:44,006 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-13 09:00:44,007 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 09:00:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 09:00:44,405 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 09:00:45,106 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-13 09:00:45,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767044963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 09:00:45,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 09:00:45,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-13 09:00:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512542414] [2024-09-13 09:00:45,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 09:00:45,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-13 09:00:45,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 09:00:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-13 09:00:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2024-09-13 09:00:45,108 INFO L87 Difference]: Start difference. First operand 1537 states and 1717 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3)