./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de62.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de62.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 de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:52:15,791 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:52:15,851 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:52:15,858 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:52:15,860 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:52:15,886 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:52:15,888 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:52:15,888 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:52:15,889 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:52:15,889 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:52:15,890 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:52:15,891 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:52:15,891 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:52:15,892 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:52:15,892 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:52:15,893 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:52:15,894 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:52:15,894 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:52:15,895 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:52:15,895 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:52:15,895 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:52:15,896 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:52:15,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:52:15,896 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:52:15,896 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:52:15,896 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:52:15,897 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:52:15,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:52:15,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:52:15,897 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:52:15,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:52:15,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:52:15,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:52:15,898 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:52:15,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:52:15,899 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:52:15,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:52:15,900 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:52:15,900 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:52:15,900 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:52:15,900 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:52:15,901 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:52:15,901 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> de9532d8dfc4a0a0cd7c7b5fdf45ac6c04e52382fa165e3cc41d86867bc75adf Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:52:16,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:52:16,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:52:16,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:52:16,196 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:52:16,197 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:52:16,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-20 18:52:17,562 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:52:17,803 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:52:17,804 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c [2024-09-20 18:52:17,831 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/0929aa9f6/0e0c780269a649d68ab2de00ed723a38/FLAGbfb6b7bd0 [2024-09-20 18:52:17,855 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/0929aa9f6/0e0c780269a649d68ab2de00ed723a38 [2024-09-20 18:52:17,860 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:52:17,861 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:52:17,862 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:52:17,865 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:52:17,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:52:17,871 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:52:17" (1/1) ... [2024-09-20 18:52:17,872 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6a8a7884 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:17, skipping insertion in model container [2024-09-20 18:52:17,872 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:52:17" (1/1) ... [2024-09-20 18:52:17,892 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:52:18,046 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-20 18:52:18,069 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:52:18,080 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:52:18,091 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de62.c[368,381] [2024-09-20 18:52:18,098 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:52:18,116 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:52:18,116 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18 WrapperNode [2024-09-20 18:52:18,116 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:52:18,118 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:52:18,119 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:52:18,119 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:52:18,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,131 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,138 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:52:18,139 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:52:18,139 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:52:18,139 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:52:18,139 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:52:18,148 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,149 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,150 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,167 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 18:52:18,167 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,168 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,178 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,180 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,181 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,184 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:52:18,186 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:52:18,186 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:52:18,186 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:52:18,187 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (1/1) ... [2024-09-20 18:52:18,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:52:18,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:18,220 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:52:18,222 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:52:18,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:52:18,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:52:18,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:52:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:52:18,273 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:52:18,273 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:52:18,273 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:52:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:52:18,275 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:52:18,275 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:52:18,341 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:52:18,343 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:52:18,530 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 18:52:18,530 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:52:18,557 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:52:18,558 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-20 18:52:18,558 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:52:18 BoogieIcfgContainer [2024-09-20 18:52:18,558 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:52:18,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:52:18,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:52:18,564 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:52:18,564 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:52:17" (1/3) ... [2024-09-20 18:52:18,565 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b87e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:52:18, skipping insertion in model container [2024-09-20 18:52:18,565 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:52:18" (2/3) ... [2024-09-20 18:52:18,566 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@75b87e52 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:52:18, skipping insertion in model container [2024-09-20 18:52:18,567 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:52:18" (3/3) ... [2024-09-20 18:52:18,568 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de62.c [2024-09-20 18:52:18,584 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:52:18,585 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:52:18,645 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:52:18,652 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;@4495fc86, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:52:18,652 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:52:18,656 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:52:18,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 18:52:18,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:18,663 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:18,664 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:18,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:18,669 INFO L85 PathProgramCache]: Analyzing trace with hash -294793433, now seen corresponding path program 1 times [2024-09-20 18:52:18,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:18,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025438124] [2024-09-20 18:52:18,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:18,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:18,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:18,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:18,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:18,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025438124] [2024-09-20 18:52:18,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025438124] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:52:18,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:52:18,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:52:18,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016266439] [2024-09-20 18:52:18,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:18,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:52:18,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:18,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:52:18,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:52:18,865 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-09-20 18:52:18,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:18,890 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2024-09-20 18:52:18,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:52:18,892 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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 16 [2024-09-20 18:52:18,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:18,898 INFO L225 Difference]: With dead ends: 40 [2024-09-20 18:52:18,899 INFO L226 Difference]: Without dead ends: 17 [2024-09-20 18:52:18,902 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:52:18,905 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:18,906 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:18,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-20 18:52:18,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-20 18:52:18,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:18,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-09-20 18:52:18,942 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2024-09-20 18:52:18,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:18,943 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-09-20 18:52:18,943 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 states have internal predecessors, (12), 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) [2024-09-20 18:52:18,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:18,944 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-09-20 18:52:18,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 18:52:18,945 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:18,946 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:18,946 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:52:18,946 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:18,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:18,949 INFO L85 PathProgramCache]: Analyzing trace with hash -951970017, now seen corresponding path program 1 times [2024-09-20 18:52:18,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:18,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582886287] [2024-09-20 18:52:18,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:18,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:18,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,214 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:19,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:19,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:19,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582886287] [2024-09-20 18:52:19,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582886287] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:52:19,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:52:19,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:52:19,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111328414] [2024-09-20 18:52:19,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:19,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:52:19,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:19,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:52:19,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:52:19,238 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-20 18:52:19,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:19,314 INFO L93 Difference]: Finished difference Result 33 states and 45 transitions. [2024-09-20 18:52:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:52:19,314 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 16 [2024-09-20 18:52:19,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:19,316 INFO L225 Difference]: With dead ends: 33 [2024-09-20 18:52:19,316 INFO L226 Difference]: Without dead ends: 22 [2024-09-20 18:52:19,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:52:19,319 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 2 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:19,320 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 57 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:19,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-20 18:52:19,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-20 18:52:19,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:19,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 30 transitions. [2024-09-20 18:52:19,327 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 30 transitions. Word has length 16 [2024-09-20 18:52:19,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:19,328 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 30 transitions. [2024-09-20 18:52:19,328 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-20 18:52:19,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,329 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 30 transitions. [2024-09-20 18:52:19,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:52:19,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:19,330 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:19,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:52:19,330 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:19,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,331 INFO L85 PathProgramCache]: Analyzing trace with hash 589238346, now seen corresponding path program 1 times [2024-09-20 18:52:19,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:19,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [350772107] [2024-09-20 18:52:19,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [350772107] [2024-09-20 18:52:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [350772107] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:52:19,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:52:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:52:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286387732] [2024-09-20 18:52:19,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:19,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:52:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:19,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:52:19,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:52:19,397 INFO L87 Difference]: Start difference. First operand 22 states and 30 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-20 18:52:19,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:19,436 INFO L93 Difference]: Finished difference Result 46 states and 68 transitions. [2024-09-20 18:52:19,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:52:19,437 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2024-09-20 18:52:19,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:19,437 INFO L225 Difference]: With dead ends: 46 [2024-09-20 18:52:19,438 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 18:52:19,438 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:52:19,440 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:19,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 29 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:19,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 18:52:19,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-20 18:52:19,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:19,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 45 transitions. [2024-09-20 18:52:19,454 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 45 transitions. Word has length 17 [2024-09-20 18:52:19,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:19,454 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 45 transitions. [2024-09-20 18:52:19,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-20 18:52:19,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,457 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 45 transitions. [2024-09-20 18:52:19,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:52:19,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:19,458 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:19,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:52:19,459 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:19,459 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,459 INFO L85 PathProgramCache]: Analyzing trace with hash 1992066745, now seen corresponding path program 1 times [2024-09-20 18:52:19,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:19,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057277572] [2024-09-20 18:52:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:19,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:19,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,525 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:19,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:19,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057277572] [2024-09-20 18:52:19,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057277572] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:52:19,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:52:19,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:52:19,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964316793] [2024-09-20 18:52:19,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:19,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:52:19,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:52:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:52:19,542 INFO L87 Difference]: Start difference. First operand 32 states and 45 transitions. Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-20 18:52:19,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:19,576 INFO L93 Difference]: Finished difference Result 48 states and 68 transitions. [2024-09-20 18:52:19,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:52:19,577 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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 17 [2024-09-20 18:52:19,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:19,577 INFO L225 Difference]: With dead ends: 48 [2024-09-20 18:52:19,578 INFO L226 Difference]: Without dead ends: 36 [2024-09-20 18:52:19,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:52:19,579 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:19,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:19,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-20 18:52:19,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-20 18:52:19,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.4838709677419355) internal successors, (46), 31 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:19,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2024-09-20 18:52:19,589 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 17 [2024-09-20 18:52:19,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:19,589 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2024-09-20 18:52:19,590 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 3 states have internal predecessors, (13), 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) [2024-09-20 18:52:19,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,590 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2024-09-20 18:52:19,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:52:19,591 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:19,591 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:19,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 18:52:19,591 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:19,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,592 INFO L85 PathProgramCache]: Analyzing trace with hash -1567147830, now seen corresponding path program 1 times [2024-09-20 18:52:19,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:19,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076346435] [2024-09-20 18:52:19,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,707 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,714 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:19,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:19,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076346435] [2024-09-20 18:52:19,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076346435] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:52:19,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:52:19,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:52:19,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412277063] [2024-09-20 18:52:19,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:19,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:52:19,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:19,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:52:19,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:52:19,721 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 18:52:19,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:19,771 INFO L93 Difference]: Finished difference Result 46 states and 61 transitions. [2024-09-20 18:52:19,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:52:19,772 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2024-09-20 18:52:19,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:19,777 INFO L225 Difference]: With dead ends: 46 [2024-09-20 18:52:19,777 INFO L226 Difference]: Without dead ends: 32 [2024-09-20 18:52:19,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:52:19,778 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 1 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:19,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 45 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:19,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-20 18:52:19,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-20 18:52:19,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:19,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 44 transitions. [2024-09-20 18:52:19,786 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 44 transitions. Word has length 19 [2024-09-20 18:52:19,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:19,786 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 44 transitions. [2024-09-20 18:52:19,786 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 18:52:19,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,787 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 44 transitions. [2024-09-20 18:52:19,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:52:19,791 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:19,791 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:19,791 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-20 18:52:19,791 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:19,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:19,792 INFO L85 PathProgramCache]: Analyzing trace with hash 1052281419, now seen corresponding path program 1 times [2024-09-20 18:52:19,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:19,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811306623] [2024-09-20 18:52:19,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:19,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:19,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811306623] [2024-09-20 18:52:19,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811306623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:19,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497098680] [2024-09-20 18:52:19,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:19,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:19,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:19,908 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:19,911 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:52:19,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:19,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:52:19,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:20,019 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:20,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:20,077 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:20,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1497098680] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:20,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:52:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-20 18:52:20,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500774199] [2024-09-20 18:52:20,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:52:20,081 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:52:20,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:20,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:52:20,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:52:20,086 INFO L87 Difference]: Start difference. First operand 32 states and 44 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 18:52:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:20,136 INFO L93 Difference]: Finished difference Result 40 states and 52 transitions. [2024-09-20 18:52:20,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:52:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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 19 [2024-09-20 18:52:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:20,138 INFO L225 Difference]: With dead ends: 40 [2024-09-20 18:52:20,138 INFO L226 Difference]: Without dead ends: 29 [2024-09-20 18:52:20,138 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:52:20,139 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:20,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 40 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-20 18:52:20,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-20 18:52:20,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 24 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:20,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 39 transitions. [2024-09-20 18:52:20,145 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 39 transitions. Word has length 19 [2024-09-20 18:52:20,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:20,145 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 39 transitions. [2024-09-20 18:52:20,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 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) [2024-09-20 18:52:20,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:20,146 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 39 transitions. [2024-09-20 18:52:20,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:52:20,147 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:20,147 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] [2024-09-20 18:52:20,164 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:20,351 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:52:20,352 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:20,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:20,353 INFO L85 PathProgramCache]: Analyzing trace with hash -61419458, now seen corresponding path program 1 times [2024-09-20 18:52:20,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:20,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346861793] [2024-09-20 18:52:20,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:20,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:20,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:20,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:52:20,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346861793] [2024-09-20 18:52:20,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [346861793] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:20,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423149507] [2024-09-20 18:52:20,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:20,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:20,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:20,449 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:20,451 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:52:20,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:20,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:52:20,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:20,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:20,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:20,619 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:52:20,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423149507] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:20,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:20,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 6, 5] total 10 [2024-09-20 18:52:20,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569023918] [2024-09-20 18:52:20,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:20,621 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 18:52:20,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:20,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 18:52:20,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:52:20,622 INFO L87 Difference]: Start difference. First operand 29 states and 39 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2024-09-20 18:52:20,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:20,778 INFO L93 Difference]: Finished difference Result 95 states and 148 transitions. [2024-09-20 18:52:20,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:52:20,781 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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 20 [2024-09-20 18:52:20,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:20,783 INFO L225 Difference]: With dead ends: 95 [2024-09-20 18:52:20,784 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 18:52:20,784 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:52:20,785 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 37 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:20,785 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 76 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:52:20,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 18:52:20,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2024-09-20 18:52:20,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 52 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 83 transitions. [2024-09-20 18:52:20,815 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 83 transitions. Word has length 20 [2024-09-20 18:52:20,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:20,816 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 83 transitions. [2024-09-20 18:52:20,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 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) [2024-09-20 18:52:20,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:20,817 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 83 transitions. [2024-09-20 18:52:20,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:52:20,820 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:20,820 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] [2024-09-20 18:52:20,837 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 18:52:21,021 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:52:21,022 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:21,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,022 INFO L85 PathProgramCache]: Analyzing trace with hash -1324513826, now seen corresponding path program 1 times [2024-09-20 18:52:21,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:21,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657290996] [2024-09-20 18:52:21,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:21,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:21,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,116 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:21,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:21,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657290996] [2024-09-20 18:52:21,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657290996] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:21,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172455905] [2024-09-20 18:52:21,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:21,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:21,120 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:21,122 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:52:21,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:52:21,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:21,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:52:21,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:21,251 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:52:21,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172455905] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:21,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:21,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-20 18:52:21,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723635467] [2024-09-20 18:52:21,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:21,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-20 18:52:21,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:21,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-20 18:52:21,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:52:21,254 INFO L87 Difference]: Start difference. First operand 57 states and 83 transitions. Second operand has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-09-20 18:52:21,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:21,381 INFO L93 Difference]: Finished difference Result 174 states and 264 transitions. [2024-09-20 18:52:21,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:52:21,382 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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 20 [2024-09-20 18:52:21,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:21,384 INFO L225 Difference]: With dead ends: 174 [2024-09-20 18:52:21,384 INFO L226 Difference]: Without dead ends: 150 [2024-09-20 18:52:21,385 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:52:21,385 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 13 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:21,386 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 83 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:52:21,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-20 18:52:21,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 87. [2024-09-20 18:52:21,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 82 states have (on average 1.5) internal successors, (123), 82 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:21,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 127 transitions. [2024-09-20 18:52:21,424 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 127 transitions. Word has length 20 [2024-09-20 18:52:21,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:21,425 INFO L474 AbstractCegarLoop]: Abstraction has 87 states and 127 transitions. [2024-09-20 18:52:21,425 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.166666666666667) internal successors, (25), 6 states have internal predecessors, (25), 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) [2024-09-20 18:52:21,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,426 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 127 transitions. [2024-09-20 18:52:21,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:52:21,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:21,428 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] [2024-09-20 18:52:21,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:21,632 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-20 18:52:21,633 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:21,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1423642650, now seen corresponding path program 1 times [2024-09-20 18:52:21,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:21,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676694759] [2024-09-20 18:52:21,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:21,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:21,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,746 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:21,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676694759] [2024-09-20 18:52:21,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [676694759] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:21,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [629284868] [2024-09-20 18:52:21,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,747 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:21,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:21,749 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:21,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:52:21,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 18:52:21,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:21,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:21,813 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [629284868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:21,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:21,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-20 18:52:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321844576] [2024-09-20 18:52:21,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:21,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:52:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:21,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:52:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:52:21,893 INFO L87 Difference]: Start difference. First operand 87 states and 127 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, (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) [2024-09-20 18:52:22,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:22,196 INFO L93 Difference]: Finished difference Result 162 states and 239 transitions. [2024-09-20 18:52:22,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:52:22,196 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, (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 21 [2024-09-20 18:52:22,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:22,198 INFO L225 Difference]: With dead ends: 162 [2024-09-20 18:52:22,198 INFO L226 Difference]: Without dead ends: 127 [2024-09-20 18:52:22,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:52:22,199 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 34 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:22,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 77 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:52:22,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-20 18:52:22,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 106. [2024-09-20 18:52:22,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.4455445544554455) internal successors, (146), 101 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:22,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 150 transitions. [2024-09-20 18:52:22,235 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 150 transitions. Word has length 21 [2024-09-20 18:52:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:22,235 INFO L474 AbstractCegarLoop]: Abstraction has 106 states and 150 transitions. [2024-09-20 18:52:22,235 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, (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) [2024-09-20 18:52:22,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 150 transitions. [2024-09-20 18:52:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:52:22,236 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:22,236 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] [2024-09-20 18:52:22,255 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-20 18:52:22,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:22,437 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:22,437 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:22,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1756794400, now seen corresponding path program 1 times [2024-09-20 18:52:22,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:22,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41715306] [2024-09-20 18:52:22,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:22,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:22,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:22,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:22,604 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:22,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:22,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41715306] [2024-09-20 18:52:22,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41715306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:22,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727764500] [2024-09-20 18:52:22,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:22,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:22,605 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:22,607 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:22,611 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:52:22,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:22,653 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:52:22,654 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:22,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:52:22,710 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:52:22,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727764500] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:22,754 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:22,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-20 18:52:22,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282933500] [2024-09-20 18:52:22,755 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:22,755 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:52:22,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:22,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:52:22,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:52:22,756 INFO L87 Difference]: Start difference. First operand 106 states and 150 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:22,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:22,849 INFO L93 Difference]: Finished difference Result 136 states and 193 transitions. [2024-09-20 18:52:22,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:52:22,849 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 18:52:22,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:22,851 INFO L225 Difference]: With dead ends: 136 [2024-09-20 18:52:22,851 INFO L226 Difference]: Without dead ends: 120 [2024-09-20 18:52:22,851 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 43 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:52:22,852 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:22,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 94 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:52:22,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-20 18:52:22,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 102. [2024-09-20 18:52:22,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 97 states have (on average 1.4948453608247423) internal successors, (145), 97 states have internal predecessors, (145), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 149 transitions. [2024-09-20 18:52:22,889 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 149 transitions. Word has length 22 [2024-09-20 18:52:22,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:22,891 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 149 transitions. [2024-09-20 18:52:22,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 6 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:22,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 149 transitions. [2024-09-20 18:52:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:52:22,896 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:22,896 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] [2024-09-20 18:52:22,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:23,096 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 18:52:23,097 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:23,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:23,097 INFO L85 PathProgramCache]: Analyzing trace with hash 731418570, now seen corresponding path program 2 times [2024-09-20 18:52:23,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:23,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701234627] [2024-09-20 18:52:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:23,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:23,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:23,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:23,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 18:52:23,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701234627] [2024-09-20 18:52:23,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701234627] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:23,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2003181243] [2024-09-20 18:52:23,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:52:23,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:23,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:23,190 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:23,192 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:52:23,237 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:52:23,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:23,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 18:52:23,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:23,271 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 18:52:23,271 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-20 18:52:23,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2003181243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:23,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:23,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-20 18:52:23,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872824644] [2024-09-20 18:52:23,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:23,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:52:23,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:23,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:52:23,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:52:23,357 INFO L87 Difference]: Start difference. First operand 102 states and 149 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-09-20 18:52:23,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:23,541 INFO L93 Difference]: Finished difference Result 143 states and 210 transitions. [2024-09-20 18:52:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:52:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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 23 [2024-09-20 18:52:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:23,542 INFO L225 Difference]: With dead ends: 143 [2024-09-20 18:52:23,542 INFO L226 Difference]: Without dead ends: 97 [2024-09-20 18:52:23,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:52:23,544 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 26 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:23,544 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 111 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:52:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-20 18:52:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 89. [2024-09-20 18:52:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.4761904761904763) internal successors, (124), 84 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 128 transitions. [2024-09-20 18:52:23,570 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 128 transitions. Word has length 23 [2024-09-20 18:52:23,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:23,571 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 128 transitions. [2024-09-20 18:52:23,571 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 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) [2024-09-20 18:52:23,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:23,571 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 128 transitions. [2024-09-20 18:52:23,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 18:52:23,573 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:23,573 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] [2024-09-20 18:52:23,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:52:23,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 18:52:23,774 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:23,774 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:23,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1260027713, now seen corresponding path program 3 times [2024-09-20 18:52:23,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:23,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448770559] [2024-09-20 18:52:23,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:23,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:23,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:23,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:23,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:23,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:23,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448770559] [2024-09-20 18:52:23,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448770559] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:23,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [783473565] [2024-09-20 18:52:23,932 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:52:23,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:23,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:23,934 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:23,935 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:52:23,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 18:52:23,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:23,978 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:52:23,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:24,076 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:24,076 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:24,194 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:24,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [783473565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:24,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:24,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-20 18:52:24,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1220920754] [2024-09-20 18:52:24,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:24,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 18:52:24,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:24,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 18:52:24,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=156, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:52:24,196 INFO L87 Difference]: Start difference. First operand 89 states and 128 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:24,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:24,561 INFO L93 Difference]: Finished difference Result 146 states and 212 transitions. [2024-09-20 18:52:24,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:52:24,561 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-20 18:52:24,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:24,562 INFO L225 Difference]: With dead ends: 146 [2024-09-20 18:52:24,562 INFO L226 Difference]: Without dead ends: 89 [2024-09-20 18:52:24,563 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 40 SyntacticMatches, 7 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2024-09-20 18:52:24,563 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:24,564 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 192 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:24,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2024-09-20 18:52:24,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 78. [2024-09-20 18:52:24,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.4383561643835616) internal successors, (105), 73 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:24,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 109 transitions. [2024-09-20 18:52:24,584 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 109 transitions. Word has length 24 [2024-09-20 18:52:24,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:24,584 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 109 transitions. [2024-09-20 18:52:24,584 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 13 states have internal predecessors, (36), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:24,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:24,585 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 109 transitions. [2024-09-20 18:52:24,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:52:24,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:24,588 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] [2024-09-20 18:52:24,605 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:52:24,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:24,793 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:24,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:24,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2144926014, now seen corresponding path program 4 times [2024-09-20 18:52:24,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:24,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104717367] [2024-09-20 18:52:24,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:24,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:24,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:24,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:24,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:24,949 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 18:52:24,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104717367] [2024-09-20 18:52:24,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104717367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:24,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352217555] [2024-09-20 18:52:24,950 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:52:24,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:24,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:24,952 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:24,954 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:52:24,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:52:24,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:24,997 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:52:24,998 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:25,026 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 18:52:25,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:25,089 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:52:25,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352217555] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:25,090 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:25,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 5] total 13 [2024-09-20 18:52:25,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448914869] [2024-09-20 18:52:25,090 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:25,091 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:52:25,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:25,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:52:25,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:52:25,092 INFO L87 Difference]: Start difference. First operand 78 states and 109 transitions. Second operand has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2024-09-20 18:52:25,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:25,578 INFO L93 Difference]: Finished difference Result 175 states and 263 transitions. [2024-09-20 18:52:25,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:52:25,578 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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 26 [2024-09-20 18:52:25,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:25,580 INFO L225 Difference]: With dead ends: 175 [2024-09-20 18:52:25,580 INFO L226 Difference]: Without dead ends: 140 [2024-09-20 18:52:25,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-20 18:52:25,581 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 25 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:25,582 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 180 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:52:25,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2024-09-20 18:52:25,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 107. [2024-09-20 18:52:25,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 102 states have (on average 1.4411764705882353) internal successors, (147), 102 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:25,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 151 transitions. [2024-09-20 18:52:25,613 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 151 transitions. Word has length 26 [2024-09-20 18:52:25,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:25,613 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 151 transitions. [2024-09-20 18:52:25,613 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.1538461538461537) internal successors, (41), 13 states have internal predecessors, (41), 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) [2024-09-20 18:52:25,613 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:25,614 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 151 transitions. [2024-09-20 18:52:25,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 18:52:25,614 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:25,614 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:25,632 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:52:25,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:25,819 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:25,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:25,819 INFO L85 PathProgramCache]: Analyzing trace with hash -52963974, now seen corresponding path program 5 times [2024-09-20 18:52:25,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:25,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237583603] [2024-09-20 18:52:25,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:25,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:25,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:26,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:26,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:26,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237583603] [2024-09-20 18:52:26,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237583603] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:26,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529656601] [2024-09-20 18:52:26,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:52:26,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:26,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:26,014 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:26,016 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:52:26,070 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:52:26,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:26,072 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:52:26,073 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:26,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 18:52:26,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:26,310 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 18:52:26,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529656601] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:26,310 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:26,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 9] total 22 [2024-09-20 18:52:26,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564910965] [2024-09-20 18:52:26,311 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:26,311 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 18:52:26,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:26,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 18:52:26,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=350, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:52:26,312 INFO L87 Difference]: Start difference. First operand 107 states and 151 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 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) [2024-09-20 18:52:27,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:27,019 INFO L93 Difference]: Finished difference Result 183 states and 271 transitions. [2024-09-20 18:52:27,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-20 18:52:27,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 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 27 [2024-09-20 18:52:27,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:27,021 INFO L225 Difference]: With dead ends: 183 [2024-09-20 18:52:27,021 INFO L226 Difference]: Without dead ends: 146 [2024-09-20 18:52:27,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=420, Invalid=1140, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 18:52:27,023 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 36 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:27,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 199 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:52:27,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2024-09-20 18:52:27,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 116. [2024-09-20 18:52:27,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.3783783783783783) internal successors, (153), 111 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:27,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 157 transitions. [2024-09-20 18:52:27,058 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 157 transitions. Word has length 27 [2024-09-20 18:52:27,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:27,058 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 157 transitions. [2024-09-20 18:52:27,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 22 states have internal predecessors, (49), 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) [2024-09-20 18:52:27,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:27,058 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 157 transitions. [2024-09-20 18:52:27,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 18:52:27,059 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:27,059 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:27,075 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:52:27,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:52:27,259 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:27,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:27,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1202238023, now seen corresponding path program 1 times [2024-09-20 18:52:27,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:27,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305354325] [2024-09-20 18:52:27,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:27,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:27,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:27,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:27,391 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 18:52:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305354325] [2024-09-20 18:52:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305354325] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841160666] [2024-09-20 18:52:27,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:27,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:27,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:27,394 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:27,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:52:27,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:27,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 18:52:27,438 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:27,524 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:52:27,524 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:27,669 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 18:52:27,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841160666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:27,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:27,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13, 8] total 20 [2024-09-20 18:52:27,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1071441226] [2024-09-20 18:52:27,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:27,670 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:52:27,670 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:27,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:52:27,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:52:27,671 INFO L87 Difference]: Start difference. First operand 116 states and 157 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2024-09-20 18:52:28,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:28,470 INFO L93 Difference]: Finished difference Result 223 states and 327 transitions. [2024-09-20 18:52:28,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 18:52:28,470 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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 27 [2024-09-20 18:52:28,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:28,471 INFO L225 Difference]: With dead ends: 223 [2024-09-20 18:52:28,472 INFO L226 Difference]: Without dead ends: 173 [2024-09-20 18:52:28,473 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:52:28,474 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 34 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 558 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 558 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:28,474 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 214 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 558 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:52:28,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-20 18:52:28,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 142. [2024-09-20 18:52:28,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3941605839416058) internal successors, (191), 137 states have internal predecessors, (191), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:28,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 195 transitions. [2024-09-20 18:52:28,519 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 195 transitions. Word has length 27 [2024-09-20 18:52:28,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:28,521 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 195 transitions. [2024-09-20 18:52:28,521 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 20 states have internal predecessors, (46), 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) [2024-09-20 18:52:28,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:28,522 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 195 transitions. [2024-09-20 18:52:28,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 18:52:28,522 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:28,522 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:28,539 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:28,722 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:52:28,723 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:28,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:28,723 INFO L85 PathProgramCache]: Analyzing trace with hash 1489538522, now seen corresponding path program 2 times [2024-09-20 18:52:28,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:28,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793622538] [2024-09-20 18:52:28,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:28,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:28,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:28,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:28,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:28,842 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:28,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793622538] [2024-09-20 18:52:28,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793622538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:28,843 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613004106] [2024-09-20 18:52:28,843 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:52:28,843 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:28,843 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:28,845 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:28,849 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 18:52:28,893 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:52:28,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:28,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:52:28,895 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:28,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:29,086 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:52:29,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613004106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:29,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:29,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 7] total 18 [2024-09-20 18:52:29,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744660868] [2024-09-20 18:52:29,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:29,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 18:52:29,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:29,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 18:52:29,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:52:29,088 INFO L87 Difference]: Start difference. First operand 142 states and 195 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2024-09-20 18:52:29,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:29,415 INFO L93 Difference]: Finished difference Result 333 states and 496 transitions. [2024-09-20 18:52:29,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:52:29,416 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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 27 [2024-09-20 18:52:29,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:29,418 INFO L225 Difference]: With dead ends: 333 [2024-09-20 18:52:29,418 INFO L226 Difference]: Without dead ends: 265 [2024-09-20 18:52:29,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=295, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:52:29,419 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 65 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:29,419 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 230 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:29,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-20 18:52:29,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 193. [2024-09-20 18:52:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.372340425531915) internal successors, (258), 188 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:29,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 262 transitions. [2024-09-20 18:52:29,466 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 262 transitions. Word has length 27 [2024-09-20 18:52:29,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:29,466 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 262 transitions. [2024-09-20 18:52:29,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 18 states have internal predecessors, (49), 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) [2024-09-20 18:52:29,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:29,467 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 262 transitions. [2024-09-20 18:52:29,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:52:29,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:29,467 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:29,481 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:29,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:52:29,671 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:29,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:29,672 INFO L85 PathProgramCache]: Analyzing trace with hash -2067363207, now seen corresponding path program 2 times [2024-09-20 18:52:29,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:29,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309508705] [2024-09-20 18:52:29,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:29,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:29,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:29,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:29,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:29,869 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:52:29,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:29,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309508705] [2024-09-20 18:52:29,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309508705] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:29,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820537617] [2024-09-20 18:52:29,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:52:29,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:29,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:29,873 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:29,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:52:29,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:52:29,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:29,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 18:52:29,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:30,022 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:52:30,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:30,145 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:52:30,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820537617] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:30,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:30,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 23 [2024-09-20 18:52:30,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550123912] [2024-09-20 18:52:30,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:30,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:52:30,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:30,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:52:30,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:52:30,147 INFO L87 Difference]: Start difference. First operand 193 states and 262 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2024-09-20 18:52:31,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:31,107 INFO L93 Difference]: Finished difference Result 431 states and 663 transitions. [2024-09-20 18:52:31,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-20 18:52:31,107 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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 29 [2024-09-20 18:52:31,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:31,109 INFO L225 Difference]: With dead ends: 431 [2024-09-20 18:52:31,109 INFO L226 Difference]: Without dead ends: 374 [2024-09-20 18:52:31,111 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=655, Invalid=2537, Unknown=0, NotChecked=0, Total=3192 [2024-09-20 18:52:31,111 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 123 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 801 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:31,111 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 271 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 801 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:52:31,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2024-09-20 18:52:31,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 266. [2024-09-20 18:52:31,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.3754789272030652) internal successors, (359), 261 states have internal predecessors, (359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:31,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 363 transitions. [2024-09-20 18:52:31,180 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 363 transitions. Word has length 29 [2024-09-20 18:52:31,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:31,181 INFO L474 AbstractCegarLoop]: Abstraction has 266 states and 363 transitions. [2024-09-20 18:52:31,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2024-09-20 18:52:31,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:31,181 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 363 transitions. [2024-09-20 18:52:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 18:52:31,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:31,182 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] [2024-09-20 18:52:31,196 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-20 18:52:31,386 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:52:31,386 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:31,387 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:31,387 INFO L85 PathProgramCache]: Analyzing trace with hash 997958656, now seen corresponding path program 3 times [2024-09-20 18:52:31,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:31,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860303917] [2024-09-20 18:52:31,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:31,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:31,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:31,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:31,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 18:52:31,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860303917] [2024-09-20 18:52:31,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860303917] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:31,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529078765] [2024-09-20 18:52:31,588 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:52:31,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:31,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:31,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:31,591 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:52:31,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:52:31,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:31,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 18:52:31,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:31,717 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 18:52:31,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:31,779 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 18:52:31,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1529078765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:31,779 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:31,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 16 [2024-09-20 18:52:31,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [58008111] [2024-09-20 18:52:31,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:31,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:52:31,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:31,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:52:31,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:52:31,781 INFO L87 Difference]: Start difference. First operand 266 states and 363 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-09-20 18:52:39,839 WARN L293 SmtUtils]: Spent 8.01s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:52:48,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:48,333 INFO L93 Difference]: Finished difference Result 792 states and 1162 transitions. [2024-09-20 18:52:48,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:52:48,334 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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 30 [2024-09-20 18:52:48,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:48,338 INFO L225 Difference]: With dead ends: 792 [2024-09-20 18:52:48,338 INFO L226 Difference]: Without dead ends: 689 [2024-09-20 18:52:48,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=181, Invalid=371, Unknown=0, NotChecked=0, Total=552 [2024-09-20 18:52:48,339 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 94 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 235 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:48,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 205 Invalid, 235 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:48,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 689 states. [2024-09-20 18:52:48,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 689 to 333. [2024-09-20 18:52:48,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.375) internal successors, (451), 328 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:48,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 455 transitions. [2024-09-20 18:52:48,428 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 455 transitions. Word has length 30 [2024-09-20 18:52:48,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:48,428 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 455 transitions. [2024-09-20 18:52:48,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 16 states have internal predecessors, (43), 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) [2024-09-20 18:52:48,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:48,429 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 455 transitions. [2024-09-20 18:52:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 18:52:48,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:48,430 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:48,447 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 18:52:48,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:52:48,631 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:48,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:48,631 INFO L85 PathProgramCache]: Analyzing trace with hash -1400929057, now seen corresponding path program 2 times [2024-09-20 18:52:48,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:48,631 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420406526] [2024-09-20 18:52:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:48,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:48,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:48,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:48,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:48,781 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 18:52:48,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:48,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420406526] [2024-09-20 18:52:48,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420406526] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:48,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195849341] [2024-09-20 18:52:48,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:52:48,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:48,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:48,783 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:48,785 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:52:48,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:52:48,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:48,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:52:48,836 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:48,867 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:48,867 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:48,939 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-20 18:52:48,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1195849341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:48,940 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:48,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 5] total 15 [2024-09-20 18:52:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827359396] [2024-09-20 18:52:48,940 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:48,940 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 18:52:48,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:48,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 18:52:48,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:52:48,941 INFO L87 Difference]: Start difference. First operand 333 states and 455 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-09-20 18:52:49,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:49,404 INFO L93 Difference]: Finished difference Result 710 states and 1014 transitions. [2024-09-20 18:52:49,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:52:49,405 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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 30 [2024-09-20 18:52:49,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:49,407 INFO L225 Difference]: With dead ends: 710 [2024-09-20 18:52:49,407 INFO L226 Difference]: Without dead ends: 571 [2024-09-20 18:52:49,408 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=403, Unknown=0, NotChecked=0, Total=552 [2024-09-20 18:52:49,409 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 101 mSDsluCounter, 261 mSDsCounter, 0 mSdLazyCounter, 396 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:49,409 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 299 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 396 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:49,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2024-09-20 18:52:49,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 427. [2024-09-20 18:52:49,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 422 states have (on average 1.3578199052132702) internal successors, (573), 422 states have internal predecessors, (573), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:49,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 577 transitions. [2024-09-20 18:52:49,519 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 577 transitions. Word has length 30 [2024-09-20 18:52:49,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:49,519 INFO L474 AbstractCegarLoop]: Abstraction has 427 states and 577 transitions. [2024-09-20 18:52:49,519 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 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) [2024-09-20 18:52:49,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:49,520 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 577 transitions. [2024-09-20 18:52:49,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-20 18:52:49,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:49,521 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:49,534 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:49,721 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:49,721 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:49,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -184327170, now seen corresponding path program 4 times [2024-09-20 18:52:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90747823] [2024-09-20 18:52:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:49,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:49,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:49,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:49,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:49,917 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:52:49,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:49,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90747823] [2024-09-20 18:52:49,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90747823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:49,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585483479] [2024-09-20 18:52:49,918 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:52:49,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:49,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:49,920 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:49,927 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:52:49,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:52:49,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:49,974 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:52:49,975 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:50,007 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:52:50,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:50,076 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 18:52:50,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585483479] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:50,076 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:50,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 5] total 16 [2024-09-20 18:52:50,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471404681] [2024-09-20 18:52:50,077 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:50,077 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:52:50,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:50,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:52:50,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:52:50,078 INFO L87 Difference]: Start difference. First operand 427 states and 577 transitions. Second operand has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2024-09-20 18:52:50,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:50,641 INFO L93 Difference]: Finished difference Result 849 states and 1195 transitions. [2024-09-20 18:52:50,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-20 18:52:50,641 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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 32 [2024-09-20 18:52:50,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:50,644 INFO L225 Difference]: With dead ends: 849 [2024-09-20 18:52:50,644 INFO L226 Difference]: Without dead ends: 667 [2024-09-20 18:52:50,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=171, Invalid=479, Unknown=0, NotChecked=0, Total=650 [2024-09-20 18:52:50,645 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 131 mSDsluCounter, 345 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:50,645 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 389 Invalid, 579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:52:50,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2024-09-20 18:52:50,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 425. [2024-09-20 18:52:50,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 425 states, 420 states have (on average 1.3714285714285714) internal successors, (576), 420 states have internal predecessors, (576), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:50,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 425 states to 425 states and 580 transitions. [2024-09-20 18:52:50,781 INFO L78 Accepts]: Start accepts. Automaton has 425 states and 580 transitions. Word has length 32 [2024-09-20 18:52:50,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:50,782 INFO L474 AbstractCegarLoop]: Abstraction has 425 states and 580 transitions. [2024-09-20 18:52:50,782 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.375) internal successors, (54), 16 states have internal predecessors, (54), 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) [2024-09-20 18:52:50,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 425 states and 580 transitions. [2024-09-20 18:52:50,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:52:50,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:50,783 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] [2024-09-20 18:52:50,799 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 18:52:50,984 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:50,984 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:50,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:50,985 INFO L85 PathProgramCache]: Analyzing trace with hash -906855808, now seen corresponding path program 5 times [2024-09-20 18:52:50,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:50,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [68035549] [2024-09-20 18:52:50,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:50,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:51,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:51,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:51,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:51,212 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:52:51,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:51,212 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [68035549] [2024-09-20 18:52:51,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [68035549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:51,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841996812] [2024-09-20 18:52:51,213 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:52:51,213 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:51,213 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:51,215 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:51,217 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:52:51,281 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:52:51,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:51,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:52:51,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:51,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:52:51,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:51,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-20 18:52:51,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841996812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:51,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:51,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-20 18:52:51,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485787953] [2024-09-20 18:52:51,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:51,405 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 18:52:51,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:51,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 18:52:51,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:52:51,406 INFO L87 Difference]: Start difference. First operand 425 states and 580 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:51,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:51,647 INFO L93 Difference]: Finished difference Result 519 states and 698 transitions. [2024-09-20 18:52:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:52:51,647 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 18:52:51,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:51,650 INFO L225 Difference]: With dead ends: 519 [2024-09-20 18:52:51,650 INFO L226 Difference]: Without dead ends: 493 [2024-09-20 18:52:51,650 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 68 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:52:51,651 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:51,651 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 158 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:52:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2024-09-20 18:52:51,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 429. [2024-09-20 18:52:51,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 424 states have (on average 1.3797169811320755) internal successors, (585), 424 states have internal predecessors, (585), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:51,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 589 transitions. [2024-09-20 18:52:51,769 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 589 transitions. Word has length 34 [2024-09-20 18:52:51,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:51,769 INFO L474 AbstractCegarLoop]: Abstraction has 429 states and 589 transitions. [2024-09-20 18:52:51,769 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 8 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:51,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:51,769 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 589 transitions. [2024-09-20 18:52:51,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:52:51,770 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:51,770 INFO L216 NwaCegarLoop]: trace histogram [8, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:51,783 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:51,974 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:51,974 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:51,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:51,975 INFO L85 PathProgramCache]: Analyzing trace with hash 452281887, now seen corresponding path program 3 times [2024-09-20 18:52:51,975 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:51,975 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061528494] [2024-09-20 18:52:51,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:51,975 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:52,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:52,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:52,175 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:52:52,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061528494] [2024-09-20 18:52:52,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061528494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:52,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584076732] [2024-09-20 18:52:52,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:52:52,176 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:52,176 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:52,177 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) [2024-09-20 18:52:52,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:52:52,220 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:52:52,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:52,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:52:52,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:52,339 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 18:52:52,339 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:52,548 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 18:52:52,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584076732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:52,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:52,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 10] total 28 [2024-09-20 18:52:52,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000510434] [2024-09-20 18:52:52,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:52,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-20 18:52:52,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:52,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-20 18:52:52,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2024-09-20 18:52:52,550 INFO L87 Difference]: Start difference. First operand 429 states and 589 transitions. Second operand has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 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) [2024-09-20 18:52:54,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:54,907 INFO L93 Difference]: Finished difference Result 916 states and 1289 transitions. [2024-09-20 18:52:54,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2024-09-20 18:52:54,908 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 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 34 [2024-09-20 18:52:54,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:54,912 INFO L225 Difference]: With dead ends: 916 [2024-09-20 18:52:54,912 INFO L226 Difference]: Without dead ends: 581 [2024-09-20 18:52:54,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1580 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=940, Invalid=5702, Unknown=0, NotChecked=0, Total=6642 [2024-09-20 18:52:54,916 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 213 mSDsluCounter, 561 mSDsCounter, 0 mSdLazyCounter, 1844 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 213 SdHoareTripleChecker+Valid, 608 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 1844 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:54,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [213 Valid, 608 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 1844 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:52:54,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-20 18:52:55,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 445. [2024-09-20 18:52:55,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.3590909090909091) internal successors, (598), 440 states have internal predecessors, (598), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:55,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 602 transitions. [2024-09-20 18:52:55,104 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 602 transitions. Word has length 34 [2024-09-20 18:52:55,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:55,104 INFO L474 AbstractCegarLoop]: Abstraction has 445 states and 602 transitions. [2024-09-20 18:52:55,104 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.75) internal successors, (49), 28 states have internal predecessors, (49), 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) [2024-09-20 18:52:55,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:55,105 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 602 transitions. [2024-09-20 18:52:55,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:52:55,106 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:55,106 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:55,122 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 18:52:55,307 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:55,308 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:55,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:55,308 INFO L85 PathProgramCache]: Analyzing trace with hash -2108590391, now seen corresponding path program 4 times [2024-09-20 18:52:55,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:55,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273942575] [2024-09-20 18:52:55,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:55,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:55,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:55,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:55,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:55,560 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 18:52:55,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:55,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273942575] [2024-09-20 18:52:55,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273942575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:55,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808709330] [2024-09-20 18:52:55,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:52:55,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:55,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:55,563 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) [2024-09-20 18:52:55,565 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:52:55,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:52:55,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:55,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 18:52:55,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:55,655 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:52:55,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:55,763 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 18:52:55,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808709330] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:55,763 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:55,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12, 6] total 20 [2024-09-20 18:52:55,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986656585] [2024-09-20 18:52:55,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:55,764 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:52:55,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:55,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:52:55,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:52:55,765 INFO L87 Difference]: Start difference. First operand 445 states and 602 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-09-20 18:52:56,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:56,749 INFO L93 Difference]: Finished difference Result 918 states and 1325 transitions. [2024-09-20 18:52:56,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-20 18:52:56,750 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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 37 [2024-09-20 18:52:56,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:56,753 INFO L225 Difference]: With dead ends: 918 [2024-09-20 18:52:56,753 INFO L226 Difference]: Without dead ends: 780 [2024-09-20 18:52:56,754 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=299, Invalid=891, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:52:56,755 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 154 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 685 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 535 SdHoareTripleChecker+Invalid, 742 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 685 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:56,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [154 Valid, 535 Invalid, 742 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 685 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:52:56,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 780 states. [2024-09-20 18:52:56,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 780 to 534. [2024-09-20 18:52:56,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 529 states have (on average 1.3761814744801513) internal successors, (728), 529 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:56,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 732 transitions. [2024-09-20 18:52:56,932 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 732 transitions. Word has length 37 [2024-09-20 18:52:56,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:56,932 INFO L474 AbstractCegarLoop]: Abstraction has 534 states and 732 transitions. [2024-09-20 18:52:56,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 20 states have internal predecessors, (58), 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) [2024-09-20 18:52:56,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:56,933 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 732 transitions. [2024-09-20 18:52:56,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:52:56,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:56,934 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:56,948 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:57,138 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 18:52:57,139 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:57,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:57,139 INFO L85 PathProgramCache]: Analyzing trace with hash -1423913430, now seen corresponding path program 6 times [2024-09-20 18:52:57,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:57,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1877536473] [2024-09-20 18:52:57,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:57,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:57,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:57,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:57,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:57,376 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:52:57,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1877536473] [2024-09-20 18:52:57,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1877536473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:57,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666199203] [2024-09-20 18:52:57,376 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:52:57,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:57,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:57,380 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) [2024-09-20 18:52:57,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:52:57,465 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:52:57,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:57,466 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:52:57,467 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:57,649 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:52:57,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:57,986 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 3 proven. 15 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:52:57,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666199203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:57,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:57,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 10, 11] total 30 [2024-09-20 18:52:57,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054886606] [2024-09-20 18:52:57,987 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:57,987 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 18:52:57,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:57,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 18:52:57,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2024-09-20 18:52:57,989 INFO L87 Difference]: Start difference. First operand 534 states and 732 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 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) [2024-09-20 18:53:00,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:00,456 INFO L93 Difference]: Finished difference Result 1030 states and 1483 transitions. [2024-09-20 18:53:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2024-09-20 18:53:00,456 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), 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 37 [2024-09-20 18:53:00,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:00,460 INFO L225 Difference]: With dead ends: 1030 [2024-09-20 18:53:00,460 INFO L226 Difference]: Without dead ends: 709 [2024-09-20 18:53:00,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=802, Invalid=7570, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 18:53:00,463 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 133 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1955 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 820 SdHoareTripleChecker+Invalid, 2203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 1955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:00,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [133 Valid, 820 Invalid, 2203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 1955 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:53:00,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 709 states. [2024-09-20 18:53:00,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 709 to 529. [2024-09-20 18:53:00,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 529 states, 524 states have (on average 1.3587786259541985) internal successors, (712), 524 states have internal predecessors, (712), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:00,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 529 states to 529 states and 716 transitions. [2024-09-20 18:53:00,657 INFO L78 Accepts]: Start accepts. Automaton has 529 states and 716 transitions. Word has length 37 [2024-09-20 18:53:00,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:00,657 INFO L474 AbstractCegarLoop]: Abstraction has 529 states and 716 transitions. [2024-09-20 18:53:00,657 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), 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) [2024-09-20 18:53:00,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:00,657 INFO L276 IsEmpty]: Start isEmpty. Operand 529 states and 716 transitions. [2024-09-20 18:53:00,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:53:00,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:00,659 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] [2024-09-20 18:53:00,676 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 18:53:00,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 18:53:00,864 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:00,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:00,864 INFO L85 PathProgramCache]: Analyzing trace with hash 52817055, now seen corresponding path program 7 times [2024-09-20 18:53:00,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:00,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667492079] [2024-09-20 18:53:00,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:00,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:00,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:01,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:01,016 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 18:53:01,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:01,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667492079] [2024-09-20 18:53:01,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667492079] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:01,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2125042565] [2024-09-20 18:53:01,017 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:53:01,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:01,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:01,019 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) [2024-09-20 18:53:01,020 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 18:53:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:01,074 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:53:01,075 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:01,133 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 18:53:01,133 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:01,221 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-20 18:53:01,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2125042565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:01,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:01,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 7 [2024-09-20 18:53:01,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462462652] [2024-09-20 18:53:01,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:01,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-20 18:53:01,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:01,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-20 18:53:01,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-09-20 18:53:01,224 INFO L87 Difference]: Start difference. First operand 529 states and 716 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-09-20 18:53:02,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:02,036 INFO L93 Difference]: Finished difference Result 823 states and 1090 transitions. [2024-09-20 18:53:02,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:53:02,037 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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 38 [2024-09-20 18:53:02,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:02,041 INFO L225 Difference]: With dead ends: 823 [2024-09-20 18:53:02,041 INFO L226 Difference]: Without dead ends: 785 [2024-09-20 18:53:02,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 72 SyntacticMatches, 10 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:53:02,042 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 19 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:02,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 175 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:53:02,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 785 states. [2024-09-20 18:53:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 785 to 555. [2024-09-20 18:53:02,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 555 states, 550 states have (on average 1.3545454545454545) internal successors, (745), 550 states have internal predecessors, (745), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:02,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 555 states to 555 states and 749 transitions. [2024-09-20 18:53:02,243 INFO L78 Accepts]: Start accepts. Automaton has 555 states and 749 transitions. Word has length 38 [2024-09-20 18:53:02,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:02,243 INFO L474 AbstractCegarLoop]: Abstraction has 555 states and 749 transitions. [2024-09-20 18:53:02,243 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 7 states have internal predecessors, (24), 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) [2024-09-20 18:53:02,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:02,244 INFO L276 IsEmpty]: Start isEmpty. Operand 555 states and 749 transitions. [2024-09-20 18:53:02,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:53:02,245 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:02,245 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:02,261 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 18:53:02,449 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 18:53:02,450 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:02,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1717896673, now seen corresponding path program 3 times [2024-09-20 18:53:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744636930] [2024-09-20 18:53:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:02,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:02,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:02,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:02,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:02,678 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-20 18:53:02,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744636930] [2024-09-20 18:53:02,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744636930] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:02,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090041318] [2024-09-20 18:53:02,679 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:53:02,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:02,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:02,681 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) [2024-09-20 18:53:02,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 18:53:02,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:53:02,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:02,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 18:53:02,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 18:53:02,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:03,166 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-20 18:53:03,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090041318] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:03,166 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:03,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-20 18:53:03,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104019225] [2024-09-20 18:53:03,166 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:03,167 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 18:53:03,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:03,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 18:53:03,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2024-09-20 18:53:03,168 INFO L87 Difference]: Start difference. First operand 555 states and 749 transitions. Second operand has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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) [2024-09-20 18:53:05,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:05,526 INFO L93 Difference]: Finished difference Result 1179 states and 1672 transitions. [2024-09-20 18:53:05,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-20 18:53:05,527 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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 38 [2024-09-20 18:53:05,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:05,531 INFO L225 Difference]: With dead ends: 1179 [2024-09-20 18:53:05,531 INFO L226 Difference]: Without dead ends: 1065 [2024-09-20 18:53:05,533 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2006 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1538, Invalid=5944, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 18:53:05,533 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 290 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 1611 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 1834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 1611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:05,534 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 387 Invalid, 1834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 1611 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-20 18:53:05,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1065 states. [2024-09-20 18:53:05,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1065 to 659. [2024-09-20 18:53:05,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.3516819571865444) internal successors, (884), 654 states have internal predecessors, (884), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:05,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 888 transitions. [2024-09-20 18:53:05,842 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 888 transitions. Word has length 38 [2024-09-20 18:53:05,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:05,843 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 888 transitions. [2024-09-20 18:53:05,843 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.9) internal successors, (57), 30 states have internal predecessors, (57), 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) [2024-09-20 18:53:05,843 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:05,843 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 888 transitions. [2024-09-20 18:53:05,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 18:53:05,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:05,845 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] [2024-09-20 18:53:05,862 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-20 18:53:06,049 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 18:53:06,050 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:06,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:06,050 INFO L85 PathProgramCache]: Analyzing trace with hash 171159391, now seen corresponding path program 8 times [2024-09-20 18:53:06,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:06,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220391660] [2024-09-20 18:53:06,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:06,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:06,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:06,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:06,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:06,315 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:53:06,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220391660] [2024-09-20 18:53:06,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220391660] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:06,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386624324] [2024-09-20 18:53:06,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:53:06,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:06,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:06,318 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) [2024-09-20 18:53:06,319 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 18:53:06,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:53:06,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:06,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:53:06,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:06,479 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:53:06,479 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:06,609 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-20 18:53:06,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [386624324] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:06,610 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:06,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-20 18:53:06,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945820027] [2024-09-20 18:53:06,610 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:06,610 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:53:06,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:06,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:53:06,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:53:06,611 INFO L87 Difference]: Start difference. First operand 659 states and 888 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:07,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:07,154 INFO L93 Difference]: Finished difference Result 952 states and 1240 transitions. [2024-09-20 18:53:07,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:53:07,154 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 18:53:07,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:07,158 INFO L225 Difference]: With dead ends: 952 [2024-09-20 18:53:07,158 INFO L226 Difference]: Without dead ends: 828 [2024-09-20 18:53:07,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 73 SyntacticMatches, 20 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:53:07,159 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 13 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 206 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:07,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 206 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:53:07,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2024-09-20 18:53:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 659. [2024-09-20 18:53:07,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 659 states, 654 states have (on average 1.342507645259939) internal successors, (878), 654 states have internal predecessors, (878), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:07,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 659 states to 659 states and 882 transitions. [2024-09-20 18:53:07,460 INFO L78 Accepts]: Start accepts. Automaton has 659 states and 882 transitions. Word has length 40 [2024-09-20 18:53:07,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:07,461 INFO L474 AbstractCegarLoop]: Abstraction has 659 states and 882 transitions. [2024-09-20 18:53:07,461 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:07,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 659 states and 882 transitions. [2024-09-20 18:53:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 18:53:07,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:07,463 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:07,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 18:53:07,666 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 18:53:07,667 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:07,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:07,667 INFO L85 PathProgramCache]: Analyzing trace with hash 520169312, now seen corresponding path program 9 times [2024-09-20 18:53:07,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:07,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985174233] [2024-09-20 18:53:07,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:07,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:07,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:07,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:07,926 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-20 18:53:07,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:07,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985174233] [2024-09-20 18:53:07,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985174233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:07,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636492233] [2024-09-20 18:53:07,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:53:07,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:07,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:07,929 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) [2024-09-20 18:53:07,931 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 18:53:07,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:53:07,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:07,979 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:53:07,980 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-20 18:53:08,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:08,185 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 79 trivial. 0 not checked. [2024-09-20 18:53:08,185 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636492233] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:08,185 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:08,185 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 6, 6] total 22 [2024-09-20 18:53:08,185 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109820419] [2024-09-20 18:53:08,185 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:08,186 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 18:53:08,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:08,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 18:53:08,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:53:08,187 INFO L87 Difference]: Start difference. First operand 659 states and 882 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2024-09-20 18:53:09,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:09,385 INFO L93 Difference]: Finished difference Result 1366 states and 1918 transitions. [2024-09-20 18:53:09,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 18:53:09,385 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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 40 [2024-09-20 18:53:09,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:09,389 INFO L225 Difference]: With dead ends: 1366 [2024-09-20 18:53:09,389 INFO L226 Difference]: Without dead ends: 1071 [2024-09-20 18:53:09,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 80 SyntacticMatches, 6 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=371, Invalid=1111, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 18:53:09,390 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 288 mSDsluCounter, 703 mSDsCounter, 0 mSdLazyCounter, 1089 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 764 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 1089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:09,391 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 764 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 1089 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 18:53:09,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1071 states. [2024-09-20 18:53:09,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1071 to 683. [2024-09-20 18:53:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.345132743362832) internal successors, (912), 678 states have internal predecessors, (912), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:09,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 916 transitions. [2024-09-20 18:53:09,727 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 916 transitions. Word has length 40 [2024-09-20 18:53:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:09,728 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 916 transitions. [2024-09-20 18:53:09,728 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 22 states have internal predecessors, (48), 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) [2024-09-20 18:53:09,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 916 transitions. [2024-09-20 18:53:09,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:53:09,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:09,730 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:09,746 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 18:53:09,930 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 18:53:09,930 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:09,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:09,931 INFO L85 PathProgramCache]: Analyzing trace with hash -245472181, now seen corresponding path program 4 times [2024-09-20 18:53:09,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:09,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450719613] [2024-09-20 18:53:09,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:09,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:09,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:10,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:10,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:10,188 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 18:53:10,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:10,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450719613] [2024-09-20 18:53:10,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450719613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:10,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138688588] [2024-09-20 18:53:10,189 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:53:10,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:10,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:10,190 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) [2024-09-20 18:53:10,191 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 18:53:10,237 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:53:10,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:10,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-20 18:53:10,239 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 18:53:10,294 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:10,713 INFO L134 CoverageAnalysis]: Checked inductivity of 98 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2024-09-20 18:53:10,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138688588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:10,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:10,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 19] total 36 [2024-09-20 18:53:10,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712492934] [2024-09-20 18:53:10,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:10,714 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-20 18:53:10,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:10,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-20 18:53:10,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 18:53:10,715 INFO L87 Difference]: Start difference. First operand 683 states and 916 transitions. Second operand has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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) [2024-09-20 18:53:48,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:48,419 INFO L93 Difference]: Finished difference Result 1819 states and 2541 transitions. [2024-09-20 18:53:48,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 528 states. [2024-09-20 18:53:48,419 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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 41 [2024-09-20 18:53:48,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:48,424 INFO L225 Difference]: With dead ends: 1819 [2024-09-20 18:53:48,424 INFO L226 Difference]: Without dead ends: 1490 [2024-09-20 18:53:48,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 594 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 527 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132299 ImplicationChecksByTransitivity, 33.7s TimeCoverageRelationStatistics Valid=34017, Invalid=245295, Unknown=0, NotChecked=0, Total=279312 [2024-09-20 18:53:48,440 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 1728 mSDsluCounter, 587 mSDsCounter, 0 mSdLazyCounter, 2553 mSolverCounterSat, 1568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 628 SdHoareTripleChecker+Invalid, 4121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1568 IncrementalHoareTripleChecker+Valid, 2553 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:48,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 628 Invalid, 4121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1568 Valid, 2553 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2024-09-20 18:53:48,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1490 states. [2024-09-20 18:53:49,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1490 to 778. [2024-09-20 18:53:49,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 773 states have (on average 1.3570504527813714) internal successors, (1049), 773 states have internal predecessors, (1049), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:49,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1053 transitions. [2024-09-20 18:53:49,081 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1053 transitions. Word has length 41 [2024-09-20 18:53:49,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:49,082 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1053 transitions. [2024-09-20 18:53:49,082 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3888888888888888) internal successors, (50), 36 states have internal predecessors, (50), 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) [2024-09-20 18:53:49,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:49,082 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1053 transitions. [2024-09-20 18:53:49,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:53:49,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:49,084 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] [2024-09-20 18:53:49,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-20 18:53:49,284 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 18:53:49,285 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:49,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1706754144, now seen corresponding path program 10 times [2024-09-20 18:53:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701760988] [2024-09-20 18:53:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:49,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:49,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:49,549 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:53:49,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701760988] [2024-09-20 18:53:49,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701760988] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:49,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715669621] [2024-09-20 18:53:49,549 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:53:49,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:49,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:49,551 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) [2024-09-20 18:53:49,552 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 18:53:49,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:53:49,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:49,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 18:53:49,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:49,719 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 18:53:49,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:49,804 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 18:53:49,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715669621] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:49,804 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:49,804 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-20 18:53:49,804 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246992269] [2024-09-20 18:53:49,804 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:49,805 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 18:53:49,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:49,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 18:53:49,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-20 18:53:49,805 INFO L87 Difference]: Start difference. First operand 778 states and 1053 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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) [2024-09-20 18:54:05,914 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:54:18,007 WARN L293 SmtUtils]: Spent 12.07s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:54:26,049 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:54:42,214 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:54:50,311 WARN L293 SmtUtils]: Spent 8.03s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:55:02,600 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 18:55:14,888 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:19,022 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:23,158 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:28,231 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:32,343 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:36,534 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 18:55:37,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:37,244 INFO L93 Difference]: Finished difference Result 2423 states and 3397 transitions. [2024-09-20 18:55:37,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-20 18:55:37,244 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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 42 [2024-09-20 18:55:37,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:37,250 INFO L225 Difference]: With dead ends: 2423 [2024-09-20 18:55:37,250 INFO L226 Difference]: Without dead ends: 2172 [2024-09-20 18:55:37,251 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 80.9s TimeCoverageRelationStatistics Valid=819, Invalid=1937, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:55:37,251 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 240 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 235 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 349 SdHoareTripleChecker+Invalid, 508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 235 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:37,252 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [240 Valid, 349 Invalid, 508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [235 Valid, 267 Invalid, 6 Unknown, 0 Unchecked, 24.6s Time] [2024-09-20 18:55:37,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2172 states. [2024-09-20 18:55:38,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2172 to 941. [2024-09-20 18:55:38,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 941 states, 936 states have (on average 1.4006410256410255) internal successors, (1311), 936 states have internal predecessors, (1311), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:38,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 941 states to 941 states and 1315 transitions. [2024-09-20 18:55:38,019 INFO L78 Accepts]: Start accepts. Automaton has 941 states and 1315 transitions. Word has length 42 [2024-09-20 18:55:38,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:38,019 INFO L474 AbstractCegarLoop]: Abstraction has 941 states and 1315 transitions. [2024-09-20 18:55:38,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 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) [2024-09-20 18:55:38,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:38,020 INFO L276 IsEmpty]: Start isEmpty. Operand 941 states and 1315 transitions. [2024-09-20 18:55:38,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 18:55:38,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:38,022 INFO L216 NwaCegarLoop]: trace histogram [12, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:38,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-20 18:55:38,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:38,222 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:38,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:38,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1818242915, now seen corresponding path program 11 times [2024-09-20 18:55:38,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:38,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098709144] [2024-09-20 18:55:38,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:38,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:38,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:38,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:38,564 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:55:38,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:38,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098709144] [2024-09-20 18:55:38,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098709144] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:38,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [642902814] [2024-09-20 18:55:38,565 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:55:38,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:38,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:38,567 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) [2024-09-20 18:55:38,568 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 18:55:38,716 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 18:55:38,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:38,717 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-20 18:55:38,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:38,758 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 18:55:38,758 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:38,865 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-20 18:55:38,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [642902814] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:38,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:38,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 6] total 23 [2024-09-20 18:55:38,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353668805] [2024-09-20 18:55:38,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:38,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-20 18:55:38,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:38,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-20 18:55:38,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:55:38,867 INFO L87 Difference]: Start difference. First operand 941 states and 1315 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 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) [2024-09-20 18:55:40,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:40,901 INFO L93 Difference]: Finished difference Result 1882 states and 2695 transitions. [2024-09-20 18:55:40,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 18:55:40,902 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 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 42 [2024-09-20 18:55:40,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:40,907 INFO L225 Difference]: With dead ends: 1882 [2024-09-20 18:55:40,907 INFO L226 Difference]: Without dead ends: 1496 [2024-09-20 18:55:40,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=1235, Unknown=0, NotChecked=0, Total=1640 [2024-09-20 18:55:40,909 INFO L434 NwaCegarLoop]: 68 mSDtfsCounter, 148 mSDsluCounter, 849 mSDsCounter, 0 mSdLazyCounter, 1060 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 917 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 1060 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:40,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [148 Valid, 917 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 1060 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:55:40,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1496 states. [2024-09-20 18:55:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1496 to 1111. [2024-09-20 18:55:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1106 states have (on average 1.3860759493670887) internal successors, (1533), 1106 states have internal predecessors, (1533), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 1537 transitions. [2024-09-20 18:55:41,736 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 1537 transitions. Word has length 42 [2024-09-20 18:55:41,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:41,736 INFO L474 AbstractCegarLoop]: Abstraction has 1111 states and 1537 transitions. [2024-09-20 18:55:41,737 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 23 states have internal predecessors, (65), 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) [2024-09-20 18:55:41,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:41,737 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 1537 transitions. [2024-09-20 18:55:41,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:55:41,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:41,739 INFO L216 NwaCegarLoop]: trace histogram [13, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:41,756 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 18:55:41,939 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:41,940 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:41,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:41,940 INFO L85 PathProgramCache]: Analyzing trace with hash 354078411, now seen corresponding path program 5 times [2024-09-20 18:55:41,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:41,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61667009] [2024-09-20 18:55:41,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:41,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:41,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:42,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:42,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:42,304 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:55:42,304 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:42,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61667009] [2024-09-20 18:55:42,304 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61667009] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:42,304 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954860597] [2024-09-20 18:55:42,304 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:55:42,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:42,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:42,307 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) [2024-09-20 18:55:42,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 18:55:42,427 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 18:55:42,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:42,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 18:55:42,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:42,637 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 0 proven. 107 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-20 18:55:42,638 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:43,047 INFO L134 CoverageAnalysis]: Checked inductivity of 123 backedges. 3 proven. 19 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2024-09-20 18:55:43,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954860597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:43,047 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:43,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 24, 13] total 40 [2024-09-20 18:55:43,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1315444402] [2024-09-20 18:55:43,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:43,048 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 18:55:43,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:43,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 18:55:43,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=1282, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 18:55:43,049 INFO L87 Difference]: Start difference. First operand 1111 states and 1537 transitions. Second operand has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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) [2024-09-20 18:55:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:47,114 INFO L93 Difference]: Finished difference Result 1981 states and 2822 transitions. [2024-09-20 18:55:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2024-09-20 18:55:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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 43 [2024-09-20 18:55:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:47,120 INFO L225 Difference]: With dead ends: 1981 [2024-09-20 18:55:47,120 INFO L226 Difference]: Without dead ends: 1525 [2024-09-20 18:55:47,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=1388, Invalid=6984, Unknown=0, NotChecked=0, Total=8372 [2024-09-20 18:55:47,122 INFO L434 NwaCegarLoop]: 74 mSDtfsCounter, 382 mSDsluCounter, 1024 mSDsCounter, 0 mSdLazyCounter, 2258 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 1098 SdHoareTripleChecker+Invalid, 2647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 2258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:47,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 1098 Invalid, 2647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 2258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 18:55:47,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2024-09-20 18:55:48,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1252. [2024-09-20 18:55:48,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1252 states, 1247 states have (on average 1.3672814755412992) internal successors, (1705), 1247 states have internal predecessors, (1705), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:48,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1252 states to 1252 states and 1709 transitions. [2024-09-20 18:55:48,012 INFO L78 Accepts]: Start accepts. Automaton has 1252 states and 1709 transitions. Word has length 43 [2024-09-20 18:55:48,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:48,012 INFO L474 AbstractCegarLoop]: Abstraction has 1252 states and 1709 transitions. [2024-09-20 18:55:48,012 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.5) internal successors, (60), 40 states have internal predecessors, (60), 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) [2024-09-20 18:55:48,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:48,012 INFO L276 IsEmpty]: Start isEmpty. Operand 1252 states and 1709 transitions. [2024-09-20 18:55:48,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:55:48,014 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:48,014 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] [2024-09-20 18:55:48,031 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 18:55:48,214 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:48,215 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:48,215 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:48,215 INFO L85 PathProgramCache]: Analyzing trace with hash -705458464, now seen corresponding path program 12 times [2024-09-20 18:55:48,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:48,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981805980] [2024-09-20 18:55:48,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:48,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:48,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:48,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:48,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:48,526 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 18:55:48,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:48,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981805980] [2024-09-20 18:55:48,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981805980] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:48,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245508458] [2024-09-20 18:55:48,527 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:55:48,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:48,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:48,529 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) [2024-09-20 18:55:48,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 18:55:48,589 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:55:48,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:48,591 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 18:55:48,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:48,671 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:55:48,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:48,786 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-20 18:55:48,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245508458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:48,787 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:48,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-20 18:55:48,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417140419] [2024-09-20 18:55:48,787 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:48,787 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 18:55:48,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:48,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 18:55:48,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:55:48,788 INFO L87 Difference]: Start difference. First operand 1252 states and 1709 transitions. Second operand has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:50,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:50,164 INFO L93 Difference]: Finished difference Result 1551 states and 2069 transitions. [2024-09-20 18:55:50,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:55:50,165 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-20 18:55:50,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:50,169 INFO L225 Difference]: With dead ends: 1551 [2024-09-20 18:55:50,169 INFO L226 Difference]: Without dead ends: 1515 [2024-09-20 18:55:50,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 94 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:55:50,170 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 18 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 263 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 315 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:50,170 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 315 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 263 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:55:50,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2024-09-20 18:55:51,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1259. [2024-09-20 18:55:51,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1259 states, 1254 states have (on average 1.372408293460925) internal successors, (1721), 1254 states have internal predecessors, (1721), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:51,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1259 states to 1259 states and 1725 transitions. [2024-09-20 18:55:51,048 INFO L78 Accepts]: Start accepts. Automaton has 1259 states and 1725 transitions. Word has length 46 [2024-09-20 18:55:51,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:51,048 INFO L474 AbstractCegarLoop]: Abstraction has 1259 states and 1725 transitions. [2024-09-20 18:55:51,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.6666666666666665) internal successors, (44), 10 states have internal predecessors, (44), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:51,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:51,049 INFO L276 IsEmpty]: Start isEmpty. Operand 1259 states and 1725 transitions. [2024-09-20 18:55:51,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:55:51,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:51,051 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:51,065 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 18:55:51,251 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 18:55:51,251 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:51,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:51,252 INFO L85 PathProgramCache]: Analyzing trace with hash 6792223, now seen corresponding path program 6 times [2024-09-20 18:55:51,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:51,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4987717] [2024-09-20 18:55:51,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:51,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:51,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:51,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:51,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:51,760 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-20 18:55:51,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4987717] [2024-09-20 18:55:51,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4987717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:51,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984526062] [2024-09-20 18:55:51,761 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:55:51,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:51,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:51,763 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) [2024-09-20 18:55:51,765 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 18:55:51,838 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:55:51,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:51,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:55:51,840 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:52,012 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-20 18:55:52,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:52,224 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 125 trivial. 0 not checked. [2024-09-20 18:55:52,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984526062] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:52,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:52,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 7, 7] total 27 [2024-09-20 18:55:52,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157328977] [2024-09-20 18:55:52,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:52,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 18:55:52,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:52,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 18:55:52,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-20 18:55:52,226 INFO L87 Difference]: Start difference. First operand 1259 states and 1725 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2024-09-20 18:55:54,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:55:54,919 INFO L93 Difference]: Finished difference Result 2465 states and 3570 transitions. [2024-09-20 18:55:54,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 18:55:54,920 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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 46 [2024-09-20 18:55:54,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:55:54,926 INFO L225 Difference]: With dead ends: 2465 [2024-09-20 18:55:54,926 INFO L226 Difference]: Without dead ends: 2052 [2024-09-20 18:55:54,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 87 SyntacticMatches, 8 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=542, Invalid=1810, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 18:55:54,928 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 320 mSDsluCounter, 1157 mSDsCounter, 0 mSdLazyCounter, 1747 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 1233 SdHoareTripleChecker+Invalid, 1858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:55:54,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 1233 Invalid, 1858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1747 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:55:54,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2052 states. [2024-09-20 18:55:56,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2052 to 1527. [2024-09-20 18:55:56,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1527 states, 1522 states have (on average 1.352168199737188) internal successors, (2058), 1522 states have internal predecessors, (2058), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:55:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1527 states to 1527 states and 2062 transitions. [2024-09-20 18:55:56,005 INFO L78 Accepts]: Start accepts. Automaton has 1527 states and 2062 transitions. Word has length 46 [2024-09-20 18:55:56,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:55:56,005 INFO L474 AbstractCegarLoop]: Abstraction has 1527 states and 2062 transitions. [2024-09-20 18:55:56,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2024-09-20 18:55:56,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:56,005 INFO L276 IsEmpty]: Start isEmpty. Operand 1527 states and 2062 transitions. [2024-09-20 18:55:56,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 18:55:56,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:55:56,008 INFO L216 NwaCegarLoop]: trace histogram [12, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:55:56,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-20 18:55:56,208 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 18:55:56,208 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:55:56,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:55:56,209 INFO L85 PathProgramCache]: Analyzing trace with hash 1474897977, now seen corresponding path program 5 times [2024-09-20 18:55:56,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:55:56,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535614043] [2024-09-20 18:55:56,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:55:56,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:55:56,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:56,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:55:56,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:55:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 36 proven. 72 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2024-09-20 18:55:56,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:55:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535614043] [2024-09-20 18:55:56,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535614043] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:55:56,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414921959] [2024-09-20 18:55:56,539 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:55:56,540 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:55:56,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:55:56,541 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) [2024-09-20 18:55:56,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 18:55:56,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 18:55:56,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:55:56,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 82 conjuncts are in the unsatisfiable core [2024-09-20 18:55:56,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:55:57,402 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:55:57,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:55:58,425 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:55:58,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414921959] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:55:58,425 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:55:58,425 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 35, 26] total 64 [2024-09-20 18:55:58,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221126937] [2024-09-20 18:55:58,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:55:58,426 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-20 18:55:58,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:55:58,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-20 18:55:58,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=827, Invalid=3205, Unknown=0, NotChecked=0, Total=4032 [2024-09-20 18:55:58,427 INFO L87 Difference]: Start difference. First operand 1527 states and 2062 transitions. Second operand has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 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) [2024-09-20 18:56:09,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:56:09,011 INFO L93 Difference]: Finished difference Result 2204 states and 2996 transitions. [2024-09-20 18:56:09,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2024-09-20 18:56:09,012 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 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 47 [2024-09-20 18:56:09,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:56:09,018 INFO L225 Difference]: With dead ends: 2204 [2024-09-20 18:56:09,018 INFO L226 Difference]: Without dead ends: 1979 [2024-09-20 18:56:09,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9313 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=5903, Invalid=20829, Unknown=0, NotChecked=0, Total=26732 [2024-09-20 18:56:09,021 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 356 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 3306 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 356 SdHoareTripleChecker+Valid, 707 SdHoareTripleChecker+Invalid, 3920 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 3306 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:56:09,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [356 Valid, 707 Invalid, 3920 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 3306 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 18:56:09,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2024-09-20 18:56:10,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1614. [2024-09-20 18:56:10,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1614 states, 1609 states have (on average 1.3418272218769423) internal successors, (2159), 1609 states have internal predecessors, (2159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:56:10,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1614 states to 1614 states and 2163 transitions. [2024-09-20 18:56:10,183 INFO L78 Accepts]: Start accepts. Automaton has 1614 states and 2163 transitions. Word has length 47 [2024-09-20 18:56:10,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:56:10,184 INFO L474 AbstractCegarLoop]: Abstraction has 1614 states and 2163 transitions. [2024-09-20 18:56:10,184 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.421875) internal successors, (91), 64 states have internal predecessors, (91), 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) [2024-09-20 18:56:10,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:10,184 INFO L276 IsEmpty]: Start isEmpty. Operand 1614 states and 2163 transitions. [2024-09-20 18:56:10,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 18:56:10,186 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:56:10,187 INFO L216 NwaCegarLoop]: trace histogram [15, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:56:10,205 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-20 18:56:10,387 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-20 18:56:10,387 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:56:10,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:10,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1813622775, now seen corresponding path program 13 times [2024-09-20 18:56:10,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:56:10,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255184846] [2024-09-20 18:56:10,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:56:10,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:56:10,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:10,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:10,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:10,763 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:56:10,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255184846] [2024-09-20 18:56:10,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255184846] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:10,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [44303638] [2024-09-20 18:56:10,763 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:56:10,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:10,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:10,764 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) [2024-09-20 18:56:10,765 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 18:56:10,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:10,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-20 18:56:10,816 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:10,931 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:56:10,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:56:11,251 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 4 proven. 24 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-20 18:56:11,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [44303638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:56:11,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:56:11,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 10] total 34 [2024-09-20 18:56:11,252 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760299495] [2024-09-20 18:56:11,252 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:56:11,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 18:56:11,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:56:11,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 18:56:11,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=999, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 18:56:11,253 INFO L87 Difference]: Start difference. First operand 1614 states and 2163 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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) [2024-09-20 18:56:16,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:56:16,804 INFO L93 Difference]: Finished difference Result 2675 states and 3760 transitions. [2024-09-20 18:56:16,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2024-09-20 18:56:16,804 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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 47 [2024-09-20 18:56:16,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:56:16,811 INFO L225 Difference]: With dead ends: 2675 [2024-09-20 18:56:16,811 INFO L226 Difference]: Without dead ends: 1915 [2024-09-20 18:56:16,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 85 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3331 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=760, Invalid=11450, Unknown=0, NotChecked=0, Total=12210 [2024-09-20 18:56:16,813 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 146 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 2978 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1750 SdHoareTripleChecker+Invalid, 3163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 2978 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:56:16,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1750 Invalid, 3163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 2978 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 18:56:16,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1915 states. [2024-09-20 18:56:17,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1915 to 1594. [2024-09-20 18:56:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1594 states, 1589 states have (on average 1.3455003146633102) internal successors, (2138), 1589 states have internal predecessors, (2138), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:56:17,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1594 states to 1594 states and 2142 transitions. [2024-09-20 18:56:17,943 INFO L78 Accepts]: Start accepts. Automaton has 1594 states and 2142 transitions. Word has length 47 [2024-09-20 18:56:17,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:56:17,943 INFO L474 AbstractCegarLoop]: Abstraction has 1594 states and 2142 transitions. [2024-09-20 18:56:17,943 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 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) [2024-09-20 18:56:17,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:17,944 INFO L276 IsEmpty]: Start isEmpty. Operand 1594 states and 2142 transitions. [2024-09-20 18:56:17,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 18:56:17,945 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:56:17,945 INFO L216 NwaCegarLoop]: trace histogram [12, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:56:17,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-20 18:56:18,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 18:56:18,146 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:56:18,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:18,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1226439733, now seen corresponding path program 6 times [2024-09-20 18:56:18,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:56:18,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533981338] [2024-09-20 18:56:18,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:56:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:56:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:18,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:18,541 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 30 proven. 90 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-20 18:56:18,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:18,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533981338] [2024-09-20 18:56:18,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1533981338] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:18,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184202828] [2024-09-20 18:56:18,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:56:18,542 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:18,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:18,543 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) [2024-09-20 18:56:18,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 18:56:18,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 18:56:18,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:56:18,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 18:56:18,634 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:19,154 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 174 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:56:19,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:56:19,595 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 42 proven. 66 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:56:19,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184202828] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:56:19,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:56:19,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 12] total 50 [2024-09-20 18:56:19,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978342139] [2024-09-20 18:56:19,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:56:19,596 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-20 18:56:19,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:56:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-20 18:56:19,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=392, Invalid=2058, Unknown=0, NotChecked=0, Total=2450 [2024-09-20 18:56:19,597 INFO L87 Difference]: Start difference. First operand 1594 states and 2142 transitions. Second operand has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 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) [2024-09-20 18:56:26,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:56:26,007 INFO L93 Difference]: Finished difference Result 2243 states and 3071 transitions. [2024-09-20 18:56:26,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2024-09-20 18:56:26,007 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 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 49 [2024-09-20 18:56:26,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:56:26,014 INFO L225 Difference]: With dead ends: 2243 [2024-09-20 18:56:26,014 INFO L226 Difference]: Without dead ends: 2022 [2024-09-20 18:56:26,020 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7034 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=3552, Invalid=16470, Unknown=0, NotChecked=0, Total=20022 [2024-09-20 18:56:26,021 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 479 mSDsluCounter, 822 mSDsCounter, 0 mSdLazyCounter, 4527 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 855 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 4527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:56:26,021 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [479 Valid, 855 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 4527 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-09-20 18:56:26,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2022 states. [2024-09-20 18:56:27,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2022 to 1633. [2024-09-20 18:56:27,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1633 states, 1628 states have (on average 1.3427518427518428) internal successors, (2186), 1628 states have internal predecessors, (2186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:56:27,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1633 states to 1633 states and 2190 transitions. [2024-09-20 18:56:27,234 INFO L78 Accepts]: Start accepts. Automaton has 1633 states and 2190 transitions. Word has length 49 [2024-09-20 18:56:27,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:56:27,234 INFO L474 AbstractCegarLoop]: Abstraction has 1633 states and 2190 transitions. [2024-09-20 18:56:27,234 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.8) internal successors, (90), 50 states have internal predecessors, (90), 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) [2024-09-20 18:56:27,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:27,235 INFO L276 IsEmpty]: Start isEmpty. Operand 1633 states and 2190 transitions. [2024-09-20 18:56:27,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 18:56:27,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:56:27,237 INFO L216 NwaCegarLoop]: trace histogram [16, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:56:27,253 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-20 18:56:27,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 18:56:27,438 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:56:27,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:27,438 INFO L85 PathProgramCache]: Analyzing trace with hash -1241558582, now seen corresponding path program 14 times [2024-09-20 18:56:27,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:56:27,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709732028] [2024-09-20 18:56:27,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:56:27,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:56:27,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:27,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:27,875 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 146 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 18:56:27,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:27,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709732028] [2024-09-20 18:56:27,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709732028] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:27,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203783705] [2024-09-20 18:56:27,876 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:56:27,876 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:27,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:27,878 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) [2024-09-20 18:56:27,880 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 18:56:27,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:56:27,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:56:27,946 INFO L262 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 58 conjuncts are in the unsatisfiable core [2024-09-20 18:56:27,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:28,066 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 18:56:28,066 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:56:28,315 INFO L134 CoverageAnalysis]: Checked inductivity of 177 backedges. 6 proven. 22 refuted. 0 times theorem prover too weak. 149 trivial. 0 not checked. [2024-09-20 18:56:28,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203783705] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:56:28,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:56:28,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 9] total 33 [2024-09-20 18:56:28,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655930634] [2024-09-20 18:56:28,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:56:28,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 18:56:28,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:56:28,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 18:56:28,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:56:28,316 INFO L87 Difference]: Start difference. First operand 1633 states and 2190 transitions. Second operand has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 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) [2024-09-20 18:56:31,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:56:31,876 INFO L93 Difference]: Finished difference Result 2910 states and 4177 transitions. [2024-09-20 18:56:31,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 18:56:31,877 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 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 49 [2024-09-20 18:56:31,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:56:31,883 INFO L225 Difference]: With dead ends: 2910 [2024-09-20 18:56:31,884 INFO L226 Difference]: Without dead ends: 2408 [2024-09-20 18:56:31,888 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=760, Invalid=2320, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:56:31,888 INFO L434 NwaCegarLoop]: 87 mSDtfsCounter, 433 mSDsluCounter, 1445 mSDsCounter, 0 mSdLazyCounter, 2183 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 433 SdHoareTripleChecker+Valid, 1532 SdHoareTripleChecker+Invalid, 2324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 2183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:56:31,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [433 Valid, 1532 Invalid, 2324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 2183 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-20 18:56:31,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2024-09-20 18:56:33,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1619. [2024-09-20 18:56:33,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1619 states, 1614 states have (on average 1.358736059479554) internal successors, (2193), 1614 states have internal predecessors, (2193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:56:33,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1619 states to 1619 states and 2197 transitions. [2024-09-20 18:56:33,148 INFO L78 Accepts]: Start accepts. Automaton has 1619 states and 2197 transitions. Word has length 49 [2024-09-20 18:56:33,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:56:33,148 INFO L474 AbstractCegarLoop]: Abstraction has 1619 states and 2197 transitions. [2024-09-20 18:56:33,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 33 states have internal predecessors, (77), 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) [2024-09-20 18:56:33,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 1619 states and 2197 transitions. [2024-09-20 18:56:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 18:56:33,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:56:33,151 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:56:33,167 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-20 18:56:33,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 18:56:33,354 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:56:33,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:56:33,355 INFO L85 PathProgramCache]: Analyzing trace with hash -367454977, now seen corresponding path program 15 times [2024-09-20 18:56:33,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:56:33,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013509099] [2024-09-20 18:56:33,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:56:33,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:56:33,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:33,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:56:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:56:33,576 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-20 18:56:33,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:56:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013509099] [2024-09-20 18:56:33,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013509099] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:56:33,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210917469] [2024-09-20 18:56:33,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:56:33,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:56:33,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:56:33,579 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) [2024-09-20 18:56:33,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-20 18:56:33,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:56:33,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:56:33,718 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:56:33,719 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:56:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:56:33,925 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:56:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:56:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210917469] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:56:34,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:56:34,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-09-20 18:56:34,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865396835] [2024-09-20 18:56:34,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:56:34,098 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:56:34,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:56:34,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:56:34,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:56:34,098 INFO L87 Difference]: Start difference. First operand 1619 states and 2197 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 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)