./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/half_2.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 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/loop-invgen/half_2.i -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 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:42:15,697 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:42:15,775 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:42:15,781 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:42:15,782 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:42:15,815 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:42:15,816 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:42:15,816 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:42:15,817 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:42:15,818 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:42:15,819 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:42:15,819 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:42:15,820 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:42:15,820 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:42:15,821 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:42:15,821 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:42:15,822 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:42:15,822 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:42:15,822 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:42:15,822 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:42:15,823 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:42:15,823 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:42:15,823 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:42:15,824 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:42:15,824 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:42:15,824 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:42:15,824 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:42:15,825 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:42:15,825 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:42:15,825 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:42:15,826 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:42:15,826 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:42:15,826 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:42:15,826 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:42:15,827 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:42:15,827 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:42:15,827 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:42:15,827 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:42:15,828 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:42:15,828 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:42:15,828 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:42:15,828 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:42:15,829 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 0b362a98d328467ff4a069dbed2be3429090ca070e60d49c76297e4bb94402b7 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:42:16,159 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:42:16,179 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:42:16,181 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:42:16,182 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:42:16,183 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:42:16,184 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/half_2.i [2024-09-15 18:42:17,732 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:42:17,979 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:42:17,979 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/half_2.i [2024-09-15 18:42:17,989 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/fe014c916/b7d32f8c5ddc41f0b6e891d816d23a3a/FLAG29471e0aa [2024-09-15 18:42:18,006 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/fe014c916/b7d32f8c5ddc41f0b6e891d816d23a3a [2024-09-15 18:42:18,008 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:42:18,010 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:42:18,011 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:42:18,013 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:42:18,018 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:42:18,019 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,020 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d4be27d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,020 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,040 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:42:18,202 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/loop-invgen/half_2.i[893,906] [2024-09-15 18:42:18,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:42:18,231 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:42:18,243 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/loop-invgen/half_2.i[893,906] [2024-09-15 18:42:18,247 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:42:18,264 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:42:18,265 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18 WrapperNode [2024-09-15 18:42:18,265 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:42:18,266 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:42:18,267 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:42:18,267 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:42:18,273 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,281 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,290 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:42:18,291 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:42:18,292 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:42:18,292 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:42:18,292 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:42:18,301 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,302 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,303 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,317 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]. [2024-09-15 18:42:18,317 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,318 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,323 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,325 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,326 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,328 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:42:18,332 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:42:18,344 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:42:18,344 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:42:18,345 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (1/1) ... [2024-09-15 18:42:18,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:42:18,362 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:18,378 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) [2024-09-15 18:42:18,382 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 [2024-09-15 18:42:18,430 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:42:18,431 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:42:18,431 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:42:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:42:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:42:18,432 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:42:18,432 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:42:18,433 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:42:18,434 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:42:18,434 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:42:18,498 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:42:18,501 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:42:18,637 INFO L? ?]: Removed 7 outVars from TransFormulas that were not future-live. [2024-09-15 18:42:18,637 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:42:18,664 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:42:18,664 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 18:42:18,664 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:42:18 BoogieIcfgContainer [2024-09-15 18:42:18,665 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:42:18,669 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:42:18,669 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:42:18,672 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:42:18,673 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:42:18" (1/3) ... [2024-09-15 18:42:18,673 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b1220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,674 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:42:18" (2/3) ... [2024-09-15 18:42:18,674 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20b1220 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:42:18, skipping insertion in model container [2024-09-15 18:42:18,676 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:42:18" (3/3) ... [2024-09-15 18:42:18,677 INFO L112 eAbstractionObserver]: Analyzing ICFG half_2.i [2024-09-15 18:42:18,693 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:42:18,693 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:42:18,755 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:42:18,764 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;@50815ded, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:42:18,765 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:42:18,769 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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) [2024-09-15 18:42:18,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:42:18,777 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:18,778 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:18,778 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:18,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash 1892212544, now seen corresponding path program 1 times [2024-09-15 18:42:18,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:18,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002613849] [2024-09-15 18:42:18,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:18,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:18,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:19,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:19,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002613849] [2024-09-15 18:42:19,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002613849] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:19,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:42:19,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:42:19,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803282855] [2024-09-15 18:42:19,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:19,296 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:42:19,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:19,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:42:19,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:42:19,322 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.5) internal successors, (21), 15 states have internal predecessors, (21), 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 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-09-15 18:42:19,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:19,467 INFO L93 Difference]: Finished difference Result 46 states and 60 transitions. [2024-09-15 18:42:19,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:42:19,469 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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 13 [2024-09-15 18:42:19,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:19,476 INFO L225 Difference]: With dead ends: 46 [2024-09-15 18:42:19,476 INFO L226 Difference]: Without dead ends: 26 [2024-09-15 18:42:19,479 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:42:19,483 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 4 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:19,484 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 84 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:19,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-15 18:42:19,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2024-09-15 18:42:19,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:42:19,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2024-09-15 18:42:19,517 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 13 [2024-09-15 18:42:19,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:19,519 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2024-09-15 18:42:19,520 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.5) internal successors, (9), 6 states have internal predecessors, (9), 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) [2024-09-15 18:42:19,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,520 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2024-09-15 18:42:19,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:42:19,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:19,522 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:19,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:42:19,522 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:19,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:19,523 INFO L85 PathProgramCache]: Analyzing trace with hash 706153222, now seen corresponding path program 1 times [2024-09-15 18:42:19,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:19,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723655968] [2024-09-15 18:42:19,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:19,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:19,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:19,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,764 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723655968] [2024-09-15 18:42:19,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723655968] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:19,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797589372] [2024-09-15 18:42:19,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:19,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:19,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:19,774 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) [2024-09-15 18:42:19,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:42:19,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:19,826 INFO L262 TraceCheckSpWp]: Trace formula consists of 49 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-15 18:42:19,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:19,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:19,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:20,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:20,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797589372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:20,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:20,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-15 18:42:20,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780784742] [2024-09-15 18:42:20,219 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:20,220 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:42:20,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:20,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:42:20,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:42:20,222 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 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) [2024-09-15 18:42:20,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:20,477 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2024-09-15 18:42:20,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 18:42:20,478 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 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 14 [2024-09-15 18:42:20,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:20,480 INFO L225 Difference]: With dead ends: 43 [2024-09-15 18:42:20,480 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 18:42:20,482 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:42:20,483 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:20,483 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 96 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 18:42:20,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 38. [2024-09-15 18:42:20,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 29 states have internal predecessors, (32), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 18:42:20,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2024-09-15 18:42:20,496 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 14 [2024-09-15 18:42:20,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:20,496 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2024-09-15 18:42:20,496 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.5) internal successors, (21), 13 states have internal predecessors, (21), 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) [2024-09-15 18:42:20,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,497 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2024-09-15 18:42:20,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 18:42:20,498 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:20,498 INFO L216 NwaCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:20,517 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:20,702 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:20,703 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:20,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:20,703 INFO L85 PathProgramCache]: Analyzing trace with hash 956344902, now seen corresponding path program 2 times [2024-09-15 18:42:20,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:20,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257400017] [2024-09-15 18:42:20,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:20,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:20,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:20,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:20,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:20,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257400017] [2024-09-15 18:42:20,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257400017] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:20,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792507725] [2024-09-15 18:42:20,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:42:20,865 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:20,865 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:20,868 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) [2024-09-15 18:42:20,871 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:42:20,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:42:20,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:20,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:42:20,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:21,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:21,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:21,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792507725] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:21,154 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:21,154 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-15 18:42:21,154 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200815158] [2024-09-15 18:42:21,154 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:21,155 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:42:21,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:21,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:42:21,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:42:21,156 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:21,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:21,303 INFO L93 Difference]: Finished difference Result 56 states and 62 transitions. [2024-09-15 18:42:21,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:42:21,304 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-15 18:42:21,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:21,306 INFO L225 Difference]: With dead ends: 56 [2024-09-15 18:42:21,306 INFO L226 Difference]: Without dead ends: 54 [2024-09-15 18:42:21,307 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=80, Invalid=300, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:42:21,308 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 3 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:21,308 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 173 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:21,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-15 18:42:21,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 36. [2024-09-15 18:42:21,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.2) internal successors, (30), 27 states have internal predecessors, (30), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 18:42:21,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 41 transitions. [2024-09-15 18:42:21,318 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 41 transitions. Word has length 16 [2024-09-15 18:42:21,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:21,318 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 41 transitions. [2024-09-15 18:42:21,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 15 states have internal predecessors, (25), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:42:21,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,319 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 41 transitions. [2024-09-15 18:42:21,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-15 18:42:21,320 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:21,320 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:21,338 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:21,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:21,521 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:21,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1089087464, now seen corresponding path program 1 times [2024-09-15 18:42:21,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:21,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366715563] [2024-09-15 18:42:21,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:21,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:21,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 9 [2024-09-15 18:42:21,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:21,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:21,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366715563] [2024-09-15 18:42:21,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366715563] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:21,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202046094] [2024-09-15 18:42:21,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:21,658 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:21,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:21,660 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) [2024-09-15 18:42:21,662 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:42:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:21,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-15 18:42:21,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:21,769 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:21,770 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 18:42:21,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202046094] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:42:21,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 18:42:21,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 11 [2024-09-15 18:42:21,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752559080] [2024-09-15 18:42:21,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:42:21,771 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:42:21,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:21,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:42:21,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:42:21,772 INFO L87 Difference]: Start difference. First operand 36 states and 41 transitions. Second operand has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:21,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:21,811 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2024-09-15 18:42:21,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:42:21,811 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 20 [2024-09-15 18:42:21,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:21,812 INFO L225 Difference]: With dead ends: 48 [2024-09-15 18:42:21,812 INFO L226 Difference]: Without dead ends: 36 [2024-09-15 18:42:21,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-09-15 18:42:21,816 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:21,817 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 49 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:42:21,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-15 18:42:21,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-15 18:42:21,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 25 states have (on average 1.16) internal successors, (29), 27 states have internal predecessors, (29), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 18:42:21,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2024-09-15 18:42:21,836 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 20 [2024-09-15 18:42:21,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:21,836 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2024-09-15 18:42:21,837 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.3333333333333335) internal successors, (14), 6 states have internal predecessors, (14), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-15 18:42:21,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2024-09-15 18:42:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:42:21,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:21,838 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:21,857 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:22,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:22,039 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:22,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:22,040 INFO L85 PathProgramCache]: Analyzing trace with hash -177252568, now seen corresponding path program 1 times [2024-09-15 18:42:22,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:22,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959912396] [2024-09-15 18:42:22,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:22,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:22,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:22,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 18:42:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,301 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:22,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959912396] [2024-09-15 18:42:22,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [959912396] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:22,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602281594] [2024-09-15 18:42:22,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:22,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:22,302 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:22,304 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) [2024-09-15 18:42:22,305 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:42:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:22,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:42:22,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:22,484 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:22,485 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:22,800 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:42:22,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602281594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:22,800 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:22,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 21 [2024-09-15 18:42:22,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526584225] [2024-09-15 18:42:22,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:22,801 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:42:22,801 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:22,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:42:22,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=346, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:42:22,804 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 18:42:23,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:23,139 INFO L93 Difference]: Finished difference Result 66 states and 75 transitions. [2024-09-15 18:42:23,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 18:42:23,139 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 22 [2024-09-15 18:42:23,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:23,140 INFO L225 Difference]: With dead ends: 66 [2024-09-15 18:42:23,141 INFO L226 Difference]: Without dead ends: 46 [2024-09-15 18:42:23,141 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:42:23,142 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 13 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:23,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 132 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:23,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2024-09-15 18:42:23,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 41. [2024-09-15 18:42:23,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 31 states have internal predecessors, (34), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 18:42:23,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 47 transitions. [2024-09-15 18:42:23,152 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 47 transitions. Word has length 22 [2024-09-15 18:42:23,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:23,152 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 47 transitions. [2024-09-15 18:42:23,152 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-15 18:42:23,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,152 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 47 transitions. [2024-09-15 18:42:23,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:42:23,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:23,153 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:23,170 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:42:23,354 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:23,354 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:23,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1835559814, now seen corresponding path program 2 times [2024-09-15 18:42:23,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:23,355 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1743127926] [2024-09-15 18:42:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:23,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:23,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-15 18:42:23,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 18:42:23,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:23,524 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:23,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1743127926] [2024-09-15 18:42:23,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1743127926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:23,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325567158] [2024-09-15 18:42:23,525 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:42:23,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:23,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:23,527 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) [2024-09-15 18:42:23,531 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:42:23,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:42:23,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:23,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:42:23,580 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:23,656 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:42:23,657 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:23,757 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 14 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:42:23,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325567158] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:23,758 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:23,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 18 [2024-09-15 18:42:23,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537985822] [2024-09-15 18:42:23,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:23,759 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:42:23,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:23,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:42:23,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:42:23,760 INFO L87 Difference]: Start difference. First operand 41 states and 47 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 18:42:23,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:23,889 INFO L93 Difference]: Finished difference Result 60 states and 67 transitions. [2024-09-15 18:42:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:42:23,890 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 28 [2024-09-15 18:42:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:23,891 INFO L225 Difference]: With dead ends: 60 [2024-09-15 18:42:23,891 INFO L226 Difference]: Without dead ends: 41 [2024-09-15 18:42:23,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:42:23,892 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 2 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:23,893 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 74 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:23,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-15 18:42:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-15 18:42:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 31 states have internal predecessors, (33), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 18:42:23,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 46 transitions. [2024-09-15 18:42:23,919 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 46 transitions. Word has length 28 [2024-09-15 18:42:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:23,919 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 46 transitions. [2024-09-15 18:42:23,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 18 states have internal predecessors, (34), 6 states have call successors, (7), 2 states have call predecessors, (7), 2 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-15 18:42:23,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 46 transitions. [2024-09-15 18:42:23,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:42:23,922 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:23,922 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:23,939 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:24,123 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 18:42:24,123 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:24,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:24,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1852463814, now seen corresponding path program 3 times [2024-09-15 18:42:24,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:24,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567427301] [2024-09-15 18:42:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:24,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:24,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-15 18:42:24,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:42:24,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:24,483 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:24,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567427301] [2024-09-15 18:42:24,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567427301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:24,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079774078] [2024-09-15 18:42:24,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:42:24,485 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:24,485 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:24,486 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) [2024-09-15 18:42:24,488 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:42:24,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:42:24,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:24,531 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 18:42:24,533 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:24,758 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:24,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:25,185 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 4 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1079774078] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:25,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:25,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 29 [2024-09-15 18:42:25,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227072704] [2024-09-15 18:42:25,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:25,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 18:42:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:25,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 18:42:25,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2024-09-15 18:42:25,190 INFO L87 Difference]: Start difference. First operand 41 states and 46 transitions. Second operand has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 18:42:25,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:25,500 INFO L93 Difference]: Finished difference Result 68 states and 74 transitions. [2024-09-15 18:42:25,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-15 18:42:25,501 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 30 [2024-09-15 18:42:25,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:25,502 INFO L225 Difference]: With dead ends: 68 [2024-09-15 18:42:25,502 INFO L226 Difference]: Without dead ends: 45 [2024-09-15 18:42:25,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=167, Invalid=1023, Unknown=0, NotChecked=0, Total=1190 [2024-09-15 18:42:25,504 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 298 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 298 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:25,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 174 Invalid, 311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 298 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:42:25,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-15 18:42:25,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-15 18:42:25,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 32 states have (on average 1.09375) internal successors, (35), 34 states have internal predecessors, (35), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 4 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-15 18:42:25,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2024-09-15 18:42:25,512 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 30 [2024-09-15 18:42:25,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:25,513 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2024-09-15 18:42:25,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.5357142857142858) internal successors, (43), 27 states have internal predecessors, (43), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 18:42:25,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:25,513 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2024-09-15 18:42:25,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:42:25,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:25,514 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:25,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 18:42:25,718 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:25,719 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:25,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:25,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1152152512, now seen corresponding path program 4 times [2024-09-15 18:42:25,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:25,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486925855] [2024-09-15 18:42:25,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:25,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:25,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:25,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 18:42:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:25,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:42:25,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:25,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486925855] [2024-09-15 18:42:25,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486925855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:25,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892708798] [2024-09-15 18:42:25,893 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:42:25,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:25,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:25,895 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) [2024-09-15 18:42:25,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:42:25,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:42:25,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:25,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 18:42:25,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:26,081 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:42:26,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:42:26,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892708798] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:26,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:26,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 13] total 24 [2024-09-15 18:42:26,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189102788] [2024-09-15 18:42:26,270 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:26,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:42:26,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:26,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:42:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:42:26,272 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-15 18:42:26,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:26,409 INFO L93 Difference]: Finished difference Result 54 states and 57 transitions. [2024-09-15 18:42:26,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 18:42:26,410 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) Word has length 31 [2024-09-15 18:42:26,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:26,411 INFO L225 Difference]: With dead ends: 54 [2024-09-15 18:42:26,411 INFO L226 Difference]: Without dead ends: 52 [2024-09-15 18:42:26,412 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 53 SyntacticMatches, 3 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:42:26,412 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 4 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:26,413 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 84 Invalid, 144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:42:26,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-15 18:42:26,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-09-15 18:42:26,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 18:42:26,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 55 transitions. [2024-09-15 18:42:26,426 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 55 transitions. Word has length 31 [2024-09-15 18:42:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:26,426 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 55 transitions. [2024-09-15 18:42:26,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 23 states have internal predecessors, (39), 5 states have call successors, (7), 3 states have call predecessors, (7), 2 states have return successors, (5), 3 states have call predecessors, (5), 4 states have call successors, (5) [2024-09-15 18:42:26,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:26,427 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 55 transitions. [2024-09-15 18:42:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:42:26,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:26,428 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:26,444 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 18:42:26,628 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:26,628 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:26,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:26,629 INFO L85 PathProgramCache]: Analyzing trace with hash -164723864, now seen corresponding path program 5 times [2024-09-15 18:42:26,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:26,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738003614] [2024-09-15 18:42:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:26,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:26,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:27,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-15 18:42:27,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:42:27,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:27,032 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 11 proven. 20 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:27,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738003614] [2024-09-15 18:42:27,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738003614] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:27,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952851961] [2024-09-15 18:42:27,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:42:27,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:27,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:27,035 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) [2024-09-15 18:42:27,037 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:42:27,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:42:27,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:27,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 18:42:27,080 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:27,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:27,831 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 6 proven. 25 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:27,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952851961] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:27,831 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:27,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 14] total 31 [2024-09-15 18:42:27,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309224961] [2024-09-15 18:42:27,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:27,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-15 18:42:27,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:27,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-15 18:42:27,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2024-09-15 18:42:27,834 INFO L87 Difference]: Start difference. First operand 52 states and 55 transitions. Second operand has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 18:42:28,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:28,442 INFO L93 Difference]: Finished difference Result 97 states and 109 transitions. [2024-09-15 18:42:28,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:42:28,443 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 38 [2024-09-15 18:42:28,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:28,444 INFO L225 Difference]: With dead ends: 97 [2024-09-15 18:42:28,446 INFO L226 Difference]: Without dead ends: 67 [2024-09-15 18:42:28,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=271, Invalid=1535, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:42:28,448 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 17 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:28,448 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 174 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:42:28,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-15 18:42:28,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 65. [2024-09-15 18:42:28,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 47 states have (on average 1.127659574468085) internal successors, (53), 50 states have internal predecessors, (53), 11 states have call successors, (11), 7 states have call predecessors, (11), 6 states have return successors, (10), 7 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 18:42:28,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 74 transitions. [2024-09-15 18:42:28,469 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 74 transitions. Word has length 38 [2024-09-15 18:42:28,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:28,470 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 74 transitions. [2024-09-15 18:42:28,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 1.6) internal successors, (48), 29 states have internal predecessors, (48), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 18:42:28,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:28,471 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 74 transitions. [2024-09-15 18:42:28,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:42:28,474 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:28,475 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:28,492 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 18:42:28,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:28,676 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:28,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:28,676 INFO L85 PathProgramCache]: Analyzing trace with hash 1495655394, now seen corresponding path program 6 times [2024-09-15 18:42:28,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:28,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169478248] [2024-09-15 18:42:28,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:28,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:28,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:28,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:42:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:42:28,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:28,959 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 34 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:28,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:28,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169478248] [2024-09-15 18:42:28,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169478248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:28,960 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742205916] [2024-09-15 18:42:28,960 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:42:28,960 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:28,960 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:28,962 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) [2024-09-15 18:42:28,963 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:42:29,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-15 18:42:29,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:29,010 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 18:42:29,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:29,268 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 6 proven. 60 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:42:29,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742205916] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:29,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:29,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 41 [2024-09-15 18:42:29,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83602329] [2024-09-15 18:42:29,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:29,544 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-15 18:42:29,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:29,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-15 18:42:29,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=1314, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 18:42:29,548 INFO L87 Difference]: Start difference. First operand 65 states and 74 transitions. Second operand has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 18:42:29,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:29,890 INFO L93 Difference]: Finished difference Result 120 states and 144 transitions. [2024-09-15 18:42:29,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 18:42:29,891 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 43 [2024-09-15 18:42:29,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:29,893 INFO L225 Difference]: With dead ends: 120 [2024-09-15 18:42:29,894 INFO L226 Difference]: Without dead ends: 118 [2024-09-15 18:42:29,895 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1947, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:42:29,896 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 13 mSDsluCounter, 220 mSDsCounter, 0 mSdLazyCounter, 385 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 402 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 385 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:29,897 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 243 Invalid, 402 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 385 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:42:29,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-15 18:42:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2024-09-15 18:42:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 87 states have internal predecessors, (88), 27 states have call successors, (27), 8 states have call predecessors, (27), 7 states have return successors, (26), 21 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-15 18:42:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-15 18:42:29,932 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 43 [2024-09-15 18:42:29,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:29,932 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-15 18:42:29,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.4146341463414633) internal successors, (58), 39 states have internal predecessors, (58), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-15 18:42:29,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-15 18:42:29,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-15 18:42:29,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:29,934 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:29,953 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 18:42:30,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 18:42:30,135 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:30,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:30,136 INFO L85 PathProgramCache]: Analyzing trace with hash -560948602, now seen corresponding path program 7 times [2024-09-15 18:42:30,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:30,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379235713] [2024-09-15 18:42:30,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:30,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:30,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:30,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-15 18:42:30,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:42:30,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:42:30,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:42:30,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 20 proven. 29 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:42:30,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379235713] [2024-09-15 18:42:30,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379235713] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:30,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582167552] [2024-09-15 18:42:30,578 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:42:30,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:30,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:30,580 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) [2024-09-15 18:42:30,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:42:30,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:30,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-15 18:42:30,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:30,877 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:42:30,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 8 proven. 41 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-15 18:42:31,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582167552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:31,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:31,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 16] total 36 [2024-09-15 18:42:31,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261320572] [2024-09-15 18:42:31,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:31,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:42:31,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:42:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=1072, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:42:31,500 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 18:42:32,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:32,192 INFO L93 Difference]: Finished difference Result 176 states and 207 transitions. [2024-09-15 18:42:32,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-15 18:42:32,192 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 46 [2024-09-15 18:42:32,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:32,194 INFO L225 Difference]: With dead ends: 176 [2024-09-15 18:42:32,194 INFO L226 Difference]: Without dead ends: 139 [2024-09-15 18:42:32,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 81 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=363, Invalid=2087, Unknown=0, NotChecked=0, Total=2450 [2024-09-15 18:42:32,195 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:32,196 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 210 Invalid, 490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:42:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-15 18:42:32,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 135. [2024-09-15 18:42:32,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 95 states have (on average 1.0736842105263158) internal successors, (102), 100 states have internal predecessors, (102), 31 states have call successors, (31), 9 states have call predecessors, (31), 8 states have return successors, (30), 25 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-15 18:42:32,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 163 transitions. [2024-09-15 18:42:32,228 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 163 transitions. Word has length 46 [2024-09-15 18:42:32,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:32,228 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 163 transitions. [2024-09-15 18:42:32,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.6) internal successors, (56), 34 states have internal predecessors, (56), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-15 18:42:32,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 163 transitions. [2024-09-15 18:42:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 18:42:32,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:32,231 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:32,245 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 18:42:32,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-15 18:42:32,436 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:32,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:32,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1996799912, now seen corresponding path program 8 times [2024-09-15 18:42:32,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:32,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857146989] [2024-09-15 18:42:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:32,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:32,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:32,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-15 18:42:32,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:42:32,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:42:32,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 18:42:32,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:32,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:42:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 32 proven. 39 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 18:42:33,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857146989] [2024-09-15 18:42:33,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857146989] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:33,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452204543] [2024-09-15 18:42:33,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:42:33,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:33,002 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:33,004 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) [2024-09-15 18:42:33,005 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:42:33,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:42:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:33,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 18:42:33,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:33,503 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 18:42:33,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:34,253 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 10 proven. 61 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-15 18:42:34,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452204543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:34,254 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:34,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 47 [2024-09-15 18:42:34,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715268698] [2024-09-15 18:42:34,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:34,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-15 18:42:34,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:34,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-15 18:42:34,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1863, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 18:42:34,257 INFO L87 Difference]: Start difference. First operand 135 states and 163 transitions. Second operand has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 18:42:35,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:35,083 INFO L93 Difference]: Finished difference Result 197 states and 231 transitions. [2024-09-15 18:42:35,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-15 18:42:35,084 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 54 [2024-09-15 18:42:35,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:35,085 INFO L225 Difference]: With dead ends: 197 [2024-09-15 18:42:35,085 INFO L226 Difference]: Without dead ends: 153 [2024-09-15 18:42:35,087 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1190 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=589, Invalid=3571, Unknown=0, NotChecked=0, Total=4160 [2024-09-15 18:42:35,087 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 19 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:35,087 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 202 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:42:35,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-15 18:42:35,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 150. [2024-09-15 18:42:35,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 106 states have (on average 1.0754716981132075) internal successors, (114), 111 states have internal predecessors, (114), 34 states have call successors, (34), 10 states have call predecessors, (34), 9 states have return successors, (33), 28 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-15 18:42:35,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 181 transitions. [2024-09-15 18:42:35,119 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 181 transitions. Word has length 54 [2024-09-15 18:42:35,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:35,120 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 181 transitions. [2024-09-15 18:42:35,120 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.5217391304347827) internal successors, (70), 45 states have internal predecessors, (70), 17 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-15 18:42:35,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:35,121 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 181 transitions. [2024-09-15 18:42:35,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-09-15 18:42:35,122 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:35,122 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:35,139 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 18:42:35,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:35,327 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:35,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:35,327 INFO L85 PathProgramCache]: Analyzing trace with hash 1940245062, now seen corresponding path program 9 times [2024-09-15 18:42:35,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:35,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844912112] [2024-09-15 18:42:35,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:35,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:35,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:36,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 18:42:36,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:42:36,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:42:36,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:42:36,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 18:42:36,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 18:42:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:36,136 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 47 proven. 50 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 18:42:36,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:36,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844912112] [2024-09-15 18:42:36,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844912112] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:36,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382060052] [2024-09-15 18:42:36,137 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:42:36,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:36,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:36,139 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) [2024-09-15 18:42:36,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 18:42:36,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-15 18:42:36,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:36,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 18:42:36,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:36,570 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 18:42:36,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:37,454 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 12 proven. 85 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-15 18:42:37,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382060052] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:37,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:37,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 20] total 46 [2024-09-15 18:42:37,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749908245] [2024-09-15 18:42:37,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:37,457 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-15 18:42:37,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:37,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-15 18:42:37,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=299, Invalid=1771, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:42:37,459 INFO L87 Difference]: Start difference. First operand 150 states and 181 transitions. Second operand has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-15 18:42:38,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:38,546 INFO L93 Difference]: Finished difference Result 215 states and 251 transitions. [2024-09-15 18:42:38,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-15 18:42:38,547 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) Word has length 62 [2024-09-15 18:42:38,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:38,549 INFO L225 Difference]: With dead ends: 215 [2024-09-15 18:42:38,549 INFO L226 Difference]: Without dead ends: 164 [2024-09-15 18:42:38,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 978 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=595, Invalid=3437, Unknown=0, NotChecked=0, Total=4032 [2024-09-15 18:42:38,551 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 17 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 888 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 298 SdHoareTripleChecker+Invalid, 923 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:38,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 298 Invalid, 923 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 888 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:42:38,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2024-09-15 18:42:38,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 162. [2024-09-15 18:42:38,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 115 states have (on average 1.0782608695652174) internal successors, (124), 120 states have internal predecessors, (124), 36 states have call successors, (36), 11 states have call predecessors, (36), 10 states have return successors, (35), 30 states have call predecessors, (35), 35 states have call successors, (35) [2024-09-15 18:42:38,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 195 transitions. [2024-09-15 18:42:38,591 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 195 transitions. Word has length 62 [2024-09-15 18:42:38,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:38,591 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 195 transitions. [2024-09-15 18:42:38,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 20 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (19), 19 states have call predecessors, (19), 19 states have call successors, (19) [2024-09-15 18:42:38,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:38,592 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 195 transitions. [2024-09-15 18:42:38,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2024-09-15 18:42:38,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:38,593 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:38,609 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:38,793 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 18:42:38,794 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:38,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:38,794 INFO L85 PathProgramCache]: Analyzing trace with hash 391515112, now seen corresponding path program 10 times [2024-09-15 18:42:38,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:38,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862732853] [2024-09-15 18:42:38,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:38,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:38,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:39,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-15 18:42:39,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:42:39,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:42:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 18:42:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 18:42:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:42:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:42:39,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 65 proven. 62 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:42:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862732853] [2024-09-15 18:42:39,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862732853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:39,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628510891] [2024-09-15 18:42:39,526 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:42:39,526 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:39,526 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:39,528 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) [2024-09-15 18:42:39,529 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 18:42:39,584 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:42:39,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:39,586 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-15 18:42:39,588 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:40,002 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:42:40,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:40,933 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 14 proven. 113 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-15 18:42:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628510891] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:40,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 22] total 51 [2024-09-15 18:42:40,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847233658] [2024-09-15 18:42:40,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:40,934 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-15 18:42:40,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:40,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-15 18:42:40,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=2185, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 18:42:40,936 INFO L87 Difference]: Start difference. First operand 162 states and 195 transitions. Second operand has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-15 18:42:42,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:42,285 INFO L93 Difference]: Finished difference Result 230 states and 269 transitions. [2024-09-15 18:42:42,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-15 18:42:42,286 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 70 [2024-09-15 18:42:42,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:42,288 INFO L225 Difference]: With dead ends: 230 [2024-09-15 18:42:42,288 INFO L226 Difference]: Without dead ends: 172 [2024-09-15 18:42:42,289 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=735, Invalid=4235, Unknown=0, NotChecked=0, Total=4970 [2024-09-15 18:42:42,290 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 22 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 996 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 336 SdHoareTripleChecker+Invalid, 1040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 996 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:42,290 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 336 Invalid, 1040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 996 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:42:42,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-15 18:42:42,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 170. [2024-09-15 18:42:42,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 121 states have (on average 1.0826446280991735) internal successors, (131), 127 states have internal predecessors, (131), 38 states have call successors, (38), 11 states have call predecessors, (38), 10 states have return successors, (37), 31 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-15 18:42:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 206 transitions. [2024-09-15 18:42:42,323 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 206 transitions. Word has length 70 [2024-09-15 18:42:42,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:42,323 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 206 transitions. [2024-09-15 18:42:42,323 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 1.6) internal successors, (80), 49 states have internal predecessors, (80), 23 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-15 18:42:42,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:42,324 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 206 transitions. [2024-09-15 18:42:42,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2024-09-15 18:42:42,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:42,325 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:42,339 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 18:42:42,525 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 18:42:42,525 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:42,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:42,526 INFO L85 PathProgramCache]: Analyzing trace with hash 96856582, now seen corresponding path program 11 times [2024-09-15 18:42:42,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:42,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868897285] [2024-09-15 18:42:42,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:42,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:42,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:43,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-15 18:42:43,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:42:43,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:42:43,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 18:42:43,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 18:42:43,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,322 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-15 18:42:43,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-15 18:42:43,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 18:42:43,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:43,341 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 86 proven. 75 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-15 18:42:43,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:43,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868897285] [2024-09-15 18:42:43,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [868897285] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:43,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305317174] [2024-09-15 18:42:43,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:42:43,342 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:43,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:43,344 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) [2024-09-15 18:42:43,346 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 18:42:43,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-15 18:42:43,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:43,403 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-15 18:42:43,406 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-15 18:42:43,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:44,935 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 16 proven. 145 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-15 18:42:44,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305317174] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:44,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:44,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 24] total 56 [2024-09-15 18:42:44,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581632355] [2024-09-15 18:42:44,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:44,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-15 18:42:44,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:44,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-15 18:42:44,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=2642, Unknown=0, NotChecked=0, Total=3080 [2024-09-15 18:42:44,937 INFO L87 Difference]: Start difference. First operand 170 states and 206 transitions. Second operand has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 18:42:46,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:46,535 INFO L93 Difference]: Finished difference Result 262 states and 310 transitions. [2024-09-15 18:42:46,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-15 18:42:46,535 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 78 [2024-09-15 18:42:46,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:46,537 INFO L225 Difference]: With dead ends: 262 [2024-09-15 18:42:46,537 INFO L226 Difference]: Without dead ends: 201 [2024-09-15 18:42:46,539 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 141 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=891, Invalid=5115, Unknown=0, NotChecked=0, Total=6006 [2024-09-15 18:42:46,540 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 18 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 1327 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:46,540 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 461 Invalid, 1368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1327 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:42:46,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-15 18:42:46,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2024-09-15 18:42:46,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 142 states have (on average 1.0774647887323943) internal successors, (153), 148 states have internal predecessors, (153), 46 states have call successors, (46), 12 states have call predecessors, (46), 11 states have return successors, (45), 39 states have call predecessors, (45), 45 states have call successors, (45) [2024-09-15 18:42:46,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 244 transitions. [2024-09-15 18:42:46,580 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 244 transitions. Word has length 78 [2024-09-15 18:42:46,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:46,580 INFO L474 AbstractCegarLoop]: Abstraction has 200 states and 244 transitions. [2024-09-15 18:42:46,580 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.6) internal successors, (88), 54 states have internal predecessors, (88), 26 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 18:42:46,581 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:46,581 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 244 transitions. [2024-09-15 18:42:46,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2024-09-15 18:42:46,582 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:46,582 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:46,597 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 18:42:46,786 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 18:42:46,787 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:46,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:46,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1215928280, now seen corresponding path program 12 times [2024-09-15 18:42:46,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:46,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573733130] [2024-09-15 18:42:46,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:46,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:46,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,540 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:47,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-15 18:42:47,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:42:47,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:42:47,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 18:42:47,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:42:47,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:42:47,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-15 18:42:47,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 18:42:47,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 18:42:47,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:47,615 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 110 proven. 89 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-15 18:42:47,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:47,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573733130] [2024-09-15 18:42:47,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573733130] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:47,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068936344] [2024-09-15 18:42:47,616 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:42:47,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:47,616 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:47,617 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) [2024-09-15 18:42:47,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 18:42:47,676 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-15 18:42:47,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:47,677 INFO L262 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-15 18:42:47,679 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:48,436 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-15 18:42:48,436 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 29 proven. 194 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-15 18:42:49,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068936344] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:49,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:49,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 29, 28] total 75 [2024-09-15 18:42:49,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261659666] [2024-09-15 18:42:49,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:49,907 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2024-09-15 18:42:49,907 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:49,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2024-09-15 18:42:49,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=5023, Unknown=0, NotChecked=0, Total=5550 [2024-09-15 18:42:49,909 INFO L87 Difference]: Start difference. First operand 200 states and 244 transitions. Second operand has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-15 18:42:52,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:52,306 INFO L93 Difference]: Finished difference Result 256 states and 299 transitions. [2024-09-15 18:42:52,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:42:52,306 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 86 [2024-09-15 18:42:52,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:52,308 INFO L225 Difference]: With dead ends: 256 [2024-09-15 18:42:52,308 INFO L226 Difference]: Without dead ends: 184 [2024-09-15 18:42:52,311 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2119 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1096, Invalid=10034, Unknown=0, NotChecked=0, Total=11130 [2024-09-15 18:42:52,311 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 516 mSDsCounter, 0 mSdLazyCounter, 1543 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 534 SdHoareTripleChecker+Invalid, 1608 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1543 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:52,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 534 Invalid, 1608 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1543 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:42:52,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-15 18:42:52,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2024-09-15 18:42:52,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 131 states have (on average 1.0763358778625953) internal successors, (141), 137 states have internal predecessors, (141), 42 states have call successors, (42), 11 states have call predecessors, (42), 10 states have return successors, (41), 35 states have call predecessors, (41), 41 states have call successors, (41) [2024-09-15 18:42:52,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 224 transitions. [2024-09-15 18:42:52,355 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 224 transitions. Word has length 86 [2024-09-15 18:42:52,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:52,355 INFO L474 AbstractCegarLoop]: Abstraction has 184 states and 224 transitions. [2024-09-15 18:42:52,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 74 states have (on average 1.5) internal successors, (111), 72 states have internal predecessors, (111), 29 states have call successors, (31), 3 states have call predecessors, (31), 2 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-15 18:42:52,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:52,356 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 224 transitions. [2024-09-15 18:42:52,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-15 18:42:52,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:52,357 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:52,374 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-15 18:42:52,557 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 18:42:52,558 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:52,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:52,558 INFO L85 PathProgramCache]: Analyzing trace with hash 1932610338, now seen corresponding path program 13 times [2024-09-15 18:42:52,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:52,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102843059] [2024-09-15 18:42:52,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:52,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:52,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:52,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:52,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:42:52,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 18:42:52,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 18:42:52,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:52,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 18:42:53,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 18:42:53,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 18:42:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 18:42:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:42:53,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,009 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 63 proven. 147 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-15 18:42:53,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:53,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102843059] [2024-09-15 18:42:53,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102843059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:53,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766018275] [2024-09-15 18:42:53,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:42:53,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:53,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:53,011 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) [2024-09-15 18:42:53,013 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 18:42:53,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:53,069 INFO L262 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 18:42:53,071 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:53,362 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-15 18:42:53,362 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:53,748 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 18 proven. 192 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-15 18:42:53,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766018275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:53,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:53,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-15 18:42:53,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362601301] [2024-09-15 18:42:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:53,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-15 18:42:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-15 18:42:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=375, Invalid=1977, Unknown=0, NotChecked=0, Total=2352 [2024-09-15 18:42:53,750 INFO L87 Difference]: Start difference. First operand 184 states and 224 transitions. Second operand has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 18:42:54,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:54,058 INFO L93 Difference]: Finished difference Result 197 states and 238 transitions. [2024-09-15 18:42:54,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 18:42:54,058 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 87 [2024-09-15 18:42:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:54,060 INFO L225 Difference]: With dead ends: 197 [2024-09-15 18:42:54,060 INFO L226 Difference]: Without dead ends: 195 [2024-09-15 18:42:54,061 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 159 SyntacticMatches, 12 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1261 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=603, Invalid=2937, Unknown=0, NotChecked=0, Total=3540 [2024-09-15 18:42:54,061 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 451 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:54,061 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 205 Invalid, 451 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:42:54,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-15 18:42:54,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 194. [2024-09-15 18:42:54,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 138 states have (on average 1.0724637681159421) internal successors, (148), 144 states have internal predecessors, (148), 44 states have call successors, (44), 12 states have call predecessors, (44), 11 states have return successors, (43), 37 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-15 18:42:54,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 235 transitions. [2024-09-15 18:42:54,096 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 235 transitions. Word has length 87 [2024-09-15 18:42:54,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:54,096 INFO L474 AbstractCegarLoop]: Abstraction has 194 states and 235 transitions. [2024-09-15 18:42:54,097 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.3673469387755102) internal successors, (67), 47 states have internal predecessors, (67), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 18:42:54,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:54,097 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 235 transitions. [2024-09-15 18:42:54,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-15 18:42:54,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:54,098 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:54,114 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-15 18:42:54,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:54,299 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:42:54,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:54,299 INFO L85 PathProgramCache]: Analyzing trace with hash 202176966, now seen corresponding path program 14 times [2024-09-15 18:42:54,299 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:42:54,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246819426] [2024-09-15 18:42:54,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:42:54,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:42:54,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:42:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-15 18:42:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:42:55,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 18:42:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 18:42:55,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 18:42:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 18:42:55,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 18:42:55,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 18:42:55,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:42:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-15 18:42:55,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:42:55,182 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 137 proven. 104 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-15 18:42:55,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:42:55,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246819426] [2024-09-15 18:42:55,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1246819426] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:42:55,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471665901] [2024-09-15 18:42:55,183 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:42:55,183 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:42:55,184 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:42:55,185 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) [2024-09-15 18:42:55,186 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 18:42:55,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:42:55,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:42:55,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-15 18:42:55,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:42:56,177 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-15 18:42:56,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:42:57,510 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 20 proven. 221 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-15 18:42:57,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1471665901] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:42:57,511 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:42:57,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28, 28] total 77 [2024-09-15 18:42:57,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648475798] [2024-09-15 18:42:57,511 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:42:57,511 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2024-09-15 18:42:57,511 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:42:57,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2024-09-15 18:42:57,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=769, Invalid=5083, Unknown=0, NotChecked=0, Total=5852 [2024-09-15 18:42:57,513 INFO L87 Difference]: Start difference. First operand 194 states and 235 transitions. Second operand has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-15 18:42:59,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:42:59,889 INFO L93 Difference]: Finished difference Result 304 states and 362 transitions. [2024-09-15 18:42:59,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2024-09-15 18:42:59,890 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Word has length 94 [2024-09-15 18:42:59,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:42:59,892 INFO L225 Difference]: With dead ends: 304 [2024-09-15 18:42:59,892 INFO L226 Difference]: Without dead ends: 233 [2024-09-15 18:42:59,893 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 160 SyntacticMatches, 3 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3365 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=1564, Invalid=9356, Unknown=0, NotChecked=0, Total=10920 [2024-09-15 18:42:59,894 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 24 mSDsluCounter, 506 mSDsCounter, 0 mSdLazyCounter, 1677 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 526 SdHoareTripleChecker+Invalid, 1739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1677 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:42:59,894 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 526 Invalid, 1739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1677 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:42:59,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2024-09-15 18:42:59,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2024-09-15 18:42:59,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 165 states have (on average 1.0787878787878789) internal successors, (178), 171 states have internal predecessors, (178), 54 states have call successors, (54), 13 states have call predecessors, (54), 12 states have return successors, (53), 47 states have call predecessors, (53), 53 states have call successors, (53) [2024-09-15 18:42:59,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 285 transitions. [2024-09-15 18:42:59,941 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 285 transitions. Word has length 94 [2024-09-15 18:42:59,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:42:59,941 INFO L474 AbstractCegarLoop]: Abstraction has 232 states and 285 transitions. [2024-09-15 18:42:59,942 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 76 states have (on average 1.513157894736842) internal successors, (115), 75 states have internal predecessors, (115), 32 states have call successors, (34), 3 states have call predecessors, (34), 1 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-15 18:42:59,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:42:59,942 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 285 transitions. [2024-09-15 18:42:59,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2024-09-15 18:42:59,943 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:42:59,944 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:42:59,957 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:00,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 18:43:00,146 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:00,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:00,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1191586712, now seen corresponding path program 15 times [2024-09-15 18:43:00,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:00,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72999623] [2024-09-15 18:43:00,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:00,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:00,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:01,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-15 18:43:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:43:01,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:43:01,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:43:01,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:43:01,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 18:43:01,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 18:43:01,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 18:43:01,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 18:43:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-15 18:43:01,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-15 18:43:01,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:01,192 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 167 proven. 120 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:01,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:01,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72999623] [2024-09-15 18:43:01,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72999623] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:01,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966672712] [2024-09-15 18:43:01,193 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:43:01,193 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:01,193 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:01,195 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) [2024-09-15 18:43:01,203 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 18:43:01,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-15 18:43:01,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:01,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 258 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-15 18:43:01,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:02,213 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:02,213 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:03,793 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 22 proven. 265 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:03,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966672712] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:03,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:03,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30, 30] total 83 [2024-09-15 18:43:03,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602748737] [2024-09-15 18:43:03,794 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:03,794 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2024-09-15 18:43:03,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:03,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2024-09-15 18:43:03,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=792, Invalid=6014, Unknown=0, NotChecked=0, Total=6806 [2024-09-15 18:43:03,796 INFO L87 Difference]: Start difference. First operand 232 states and 285 transitions. Second operand has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-15 18:43:05,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:05,934 INFO L93 Difference]: Finished difference Result 296 states and 348 transitions. [2024-09-15 18:43:05,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-15 18:43:05,934 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) Word has length 102 [2024-09-15 18:43:05,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:05,936 INFO L225 Difference]: With dead ends: 296 [2024-09-15 18:43:05,936 INFO L226 Difference]: Without dead ends: 214 [2024-09-15 18:43:05,937 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 292 GetRequests, 174 SyntacticMatches, 3 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3386 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=1545, Invalid=12027, Unknown=0, NotChecked=0, Total=13572 [2024-09-15 18:43:05,938 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 20 mSDsluCounter, 415 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 1324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:05,938 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 436 Invalid, 1324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:43:05,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-15 18:43:06,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2024-09-15 18:43:06,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 152 states have (on average 1.0789473684210527) internal successors, (164), 158 states have internal predecessors, (164), 49 states have call successors, (49), 12 states have call predecessors, (49), 11 states have return successors, (48), 42 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-15 18:43:06,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 261 transitions. [2024-09-15 18:43:06,004 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 261 transitions. Word has length 102 [2024-09-15 18:43:06,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:06,004 INFO L474 AbstractCegarLoop]: Abstraction has 213 states and 261 transitions. [2024-09-15 18:43:06,005 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 82 states have (on average 1.5121951219512195) internal successors, (124), 81 states have internal predecessors, (124), 35 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2024-09-15 18:43:06,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:06,005 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 261 transitions. [2024-09-15 18:43:06,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-15 18:43:06,008 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:06,008 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:06,027 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:06,209 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:06,210 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:06,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:06,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1669102750, now seen corresponding path program 16 times [2024-09-15 18:43:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539973465] [2024-09-15 18:43:06,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:06,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:06,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:06,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:43:06,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:43:06,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 18:43:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:43:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:43:06,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 18:43:06,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:43:06,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:43:06,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 18:43:06,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 18:43:06,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 18:43:06,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:06,792 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 88 proven. 212 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:06,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:06,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539973465] [2024-09-15 18:43:06,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539973465] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:06,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019964079] [2024-09-15 18:43:06,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:43:06,793 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:06,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:06,795 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) [2024-09-15 18:43:06,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 18:43:06,858 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:43:06,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:06,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-15 18:43:06,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:07,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 22 proven. 278 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-15 18:43:07,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2019964079] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:07,706 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:07,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-15 18:43:07,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822424130] [2024-09-15 18:43:07,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:07,707 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-15 18:43:07,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:07,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-15 18:43:07,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=506, Invalid=2686, Unknown=0, NotChecked=0, Total=3192 [2024-09-15 18:43:07,708 INFO L87 Difference]: Start difference. First operand 213 states and 261 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 18:43:08,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:08,082 INFO L93 Difference]: Finished difference Result 226 states and 275 transitions. [2024-09-15 18:43:08,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:43:08,082 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 103 [2024-09-15 18:43:08,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:08,084 INFO L225 Difference]: With dead ends: 226 [2024-09-15 18:43:08,084 INFO L226 Difference]: Without dead ends: 224 [2024-09-15 18:43:08,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 191 SyntacticMatches, 12 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1694 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=815, Invalid=4015, Unknown=0, NotChecked=0, Total=4830 [2024-09-15 18:43:08,085 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 3 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 492 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 492 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:08,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 212 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 492 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:43:08,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2024-09-15 18:43:08,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2024-09-15 18:43:08,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 159 states have (on average 1.0754716981132075) internal successors, (171), 165 states have internal predecessors, (171), 51 states have call successors, (51), 13 states have call predecessors, (51), 12 states have return successors, (50), 44 states have call predecessors, (50), 50 states have call successors, (50) [2024-09-15 18:43:08,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 272 transitions. [2024-09-15 18:43:08,132 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 272 transitions. Word has length 103 [2024-09-15 18:43:08,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:08,132 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 272 transitions. [2024-09-15 18:43:08,133 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 18:43:08,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:08,133 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 272 transitions. [2024-09-15 18:43:08,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-15 18:43:08,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:08,134 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:08,151 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:08,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:08,335 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:08,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:08,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1553398150, now seen corresponding path program 17 times [2024-09-15 18:43:08,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:08,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685058306] [2024-09-15 18:43:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:08,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:08,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-15 18:43:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:43:09,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 18:43:09,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:43:09,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:43:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 18:43:09,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:43:09,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:43:09,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 18:43:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 18:43:09,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 18:43:09,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:43:09,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:09,630 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 200 proven. 137 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:43:09,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685058306] [2024-09-15 18:43:09,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685058306] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:09,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435590461] [2024-09-15 18:43:09,630 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:43:09,630 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:09,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:09,632 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) [2024-09-15 18:43:09,634 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 18:43:09,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-15 18:43:09,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:09,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 90 conjuncts are in the unsatisfiable core [2024-09-15 18:43:09,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-15 18:43:10,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:12,865 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 53 proven. 317 refuted. 0 times theorem prover too weak. 231 trivial. 0 not checked. [2024-09-15 18:43:12,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435590461] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:12,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:12,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 34, 34] total 92 [2024-09-15 18:43:12,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771091473] [2024-09-15 18:43:12,866 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:12,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2024-09-15 18:43:12,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:12,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2024-09-15 18:43:12,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1049, Invalid=7323, Unknown=0, NotChecked=0, Total=8372 [2024-09-15 18:43:12,868 INFO L87 Difference]: Start difference. First operand 223 states and 272 transitions. Second operand has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-15 18:43:17,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:17,158 INFO L93 Difference]: Finished difference Result 348 states and 417 transitions. [2024-09-15 18:43:17,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-15 18:43:17,159 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) Word has length 110 [2024-09-15 18:43:17,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:17,161 INFO L225 Difference]: With dead ends: 348 [2024-09-15 18:43:17,161 INFO L226 Difference]: Without dead ends: 267 [2024-09-15 18:43:17,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 187 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5523 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=2480, Invalid=15610, Unknown=0, NotChecked=0, Total=18090 [2024-09-15 18:43:17,163 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 23 mSDsluCounter, 598 mSDsCounter, 0 mSdLazyCounter, 2313 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 619 SdHoareTripleChecker+Invalid, 2415 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 2313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:17,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 619 Invalid, 2415 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 2313 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-15 18:43:17,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-15 18:43:17,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2024-09-15 18:43:17,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 190 states have (on average 1.0789473684210527) internal successors, (205), 196 states have internal predecessors, (205), 63 states have call successors, (63), 14 states have call predecessors, (63), 13 states have return successors, (62), 56 states have call predecessors, (62), 62 states have call successors, (62) [2024-09-15 18:43:17,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 330 transitions. [2024-09-15 18:43:17,231 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 330 transitions. Word has length 110 [2024-09-15 18:43:17,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:17,231 INFO L474 AbstractCegarLoop]: Abstraction has 267 states and 330 transitions. [2024-09-15 18:43:17,232 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.5164835164835164) internal successors, (138), 90 states have internal predecessors, (138), 38 states have call successors, (40), 3 states have call predecessors, (40), 2 states have return successors, (37), 37 states have call predecessors, (37), 37 states have call successors, (37) [2024-09-15 18:43:17,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:17,233 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 330 transitions. [2024-09-15 18:43:17,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2024-09-15 18:43:17,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:17,234 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:17,251 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:17,438 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-15 18:43:17,439 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:17,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:17,439 INFO L85 PathProgramCache]: Analyzing trace with hash 1041518760, now seen corresponding path program 18 times [2024-09-15 18:43:17,439 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:17,439 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262168902] [2024-09-15 18:43:17,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:17,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:17,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 18:43:18,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:43:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:43:18,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 18:43:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 18:43:18,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-15 18:43:18,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 18:43:18,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 18:43:18,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 18:43:18,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-15 18:43:18,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-15 18:43:18,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 18:43:18,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-15 18:43:18,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 236 proven. 155 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 18:43:18,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262168902] [2024-09-15 18:43:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262168902] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:18,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020023808] [2024-09-15 18:43:18,811 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:43:18,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:18,811 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:18,813 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) [2024-09-15 18:43:18,816 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 18:43:18,885 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-15 18:43:18,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:18,887 INFO L262 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-15 18:43:18,889 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:20,048 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 18:43:20,048 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:21,971 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 26 proven. 365 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-15 18:43:21,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2020023808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:21,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:21,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 95 [2024-09-15 18:43:21,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925119529] [2024-09-15 18:43:21,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:21,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2024-09-15 18:43:21,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:21,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2024-09-15 18:43:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1159, Invalid=7771, Unknown=0, NotChecked=0, Total=8930 [2024-09-15 18:43:21,982 INFO L87 Difference]: Start difference. First operand 267 states and 330 transitions. Second operand has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-15 18:43:25,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:25,516 INFO L93 Difference]: Finished difference Result 383 states and 461 transitions. [2024-09-15 18:43:25,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-15 18:43:25,517 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) Word has length 118 [2024-09-15 18:43:25,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:25,520 INFO L225 Difference]: With dead ends: 383 [2024-09-15 18:43:25,520 INFO L226 Difference]: Without dead ends: 295 [2024-09-15 18:43:25,521 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 204 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5110 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2389, Invalid=14123, Unknown=0, NotChecked=0, Total=16512 [2024-09-15 18:43:25,522 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 28 mSDsluCounter, 730 mSDsCounter, 0 mSdLazyCounter, 2665 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 2781 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 2665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:25,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 753 Invalid, 2781 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 2665 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-15 18:43:25,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2024-09-15 18:43:25,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 293. [2024-09-15 18:43:25,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 208 states have (on average 1.0769230769230769) internal successors, (224), 215 states have internal predecessors, (224), 71 states have call successors, (71), 14 states have call predecessors, (71), 13 states have return successors, (70), 63 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-15 18:43:25,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 365 transitions. [2024-09-15 18:43:25,594 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 365 transitions. Word has length 118 [2024-09-15 18:43:25,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:25,594 INFO L474 AbstractCegarLoop]: Abstraction has 293 states and 365 transitions. [2024-09-15 18:43:25,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 94 states have (on average 1.5106382978723405) internal successors, (142), 93 states have internal predecessors, (142), 41 states have call successors, (43), 3 states have call predecessors, (43), 1 states have return successors, (40), 40 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-15 18:43:25,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:25,595 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 365 transitions. [2024-09-15 18:43:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2024-09-15 18:43:25,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:25,596 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:25,611 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-15 18:43:25,796 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:25,797 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:25,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:25,797 INFO L85 PathProgramCache]: Analyzing trace with hash -327161530, now seen corresponding path program 19 times [2024-09-15 18:43:25,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:25,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063330507] [2024-09-15 18:43:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:25,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:25,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-15 18:43:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:43:26,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 18:43:26,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 18:43:26,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:43:26,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:43:26,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-15 18:43:26,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-15 18:43:26,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:26,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 18:43:27,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 18:43:27,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 18:43:27,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-15 18:43:27,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-15 18:43:27,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-15 18:43:27,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,023 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 275 proven. 174 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-15 18:43:27,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063330507] [2024-09-15 18:43:27,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063330507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:27,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750079224] [2024-09-15 18:43:27,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:43:27,024 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:27,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:27,026 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) [2024-09-15 18:43:27,027 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-15 18:43:27,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:27,091 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 65 conjuncts are in the unsatisfiable core [2024-09-15 18:43:27,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-15 18:43:27,878 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:29,890 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 28 proven. 421 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-15 18:43:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750079224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:29,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:29,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36, 36] total 86 [2024-09-15 18:43:29,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557000272] [2024-09-15 18:43:29,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:29,891 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2024-09-15 18:43:29,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:29,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2024-09-15 18:43:29,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1023, Invalid=6287, Unknown=0, NotChecked=0, Total=7310 [2024-09-15 18:43:29,893 INFO L87 Difference]: Start difference. First operand 293 states and 365 transitions. Second operand has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-15 18:43:33,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:33,885 INFO L93 Difference]: Finished difference Result 433 states and 526 transitions. [2024-09-15 18:43:33,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-15 18:43:33,886 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) Word has length 126 [2024-09-15 18:43:33,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:33,888 INFO L225 Difference]: With dead ends: 433 [2024-09-15 18:43:33,888 INFO L226 Difference]: Without dead ends: 342 [2024-09-15 18:43:33,890 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 231 SyntacticMatches, 3 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3762 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=2163, Invalid=12117, Unknown=0, NotChecked=0, Total=14280 [2024-09-15 18:43:33,890 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 25 mSDsluCounter, 862 mSDsCounter, 0 mSdLazyCounter, 3004 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 886 SdHoareTripleChecker+Invalid, 3115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 3004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:33,890 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 886 Invalid, 3115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 3004 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-15 18:43:33,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2024-09-15 18:43:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 341. [2024-09-15 18:43:33,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 241 states have (on average 1.070539419087137) internal successors, (258), 248 states have internal predecessors, (258), 85 states have call successors, (85), 15 states have call predecessors, (85), 14 states have return successors, (84), 77 states have call predecessors, (84), 84 states have call successors, (84) [2024-09-15 18:43:33,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2024-09-15 18:43:33,969 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 126 [2024-09-15 18:43:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:33,969 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2024-09-15 18:43:33,970 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.6) internal successors, (136), 84 states have internal predecessors, (136), 44 states have call successors, (46), 3 states have call predecessors, (46), 1 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-15 18:43:33,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:33,970 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2024-09-15 18:43:33,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2024-09-15 18:43:33,972 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:33,972 INFO L216 NwaCegarLoop]: trace histogram [27, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:33,990 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-15 18:43:34,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-15 18:43:34,173 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:34,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:34,174 INFO L85 PathProgramCache]: Analyzing trace with hash 1728201798, now seen corresponding path program 20 times [2024-09-15 18:43:34,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:34,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659789405] [2024-09-15 18:43:34,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:34,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 18:43:35,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:43:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,159 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:43:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 18:43:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:43:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:43:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 18:43:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 18:43:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 18:43:35,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:43:35,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-15 18:43:35,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-15 18:43:35,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:35,174 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 349 proven. 275 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:43:35,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:35,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659789405] [2024-09-15 18:43:35,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659789405] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:35,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [873045759] [2024-09-15 18:43:35,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:43:35,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:35,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:35,177 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) [2024-09-15 18:43:35,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-15 18:43:35,260 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:43:35,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:35,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-15 18:43:35,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:36,350 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:43:36,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 888 backedges. 24 proven. 600 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-15 18:43:37,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [873045759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:37,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:37,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 113 [2024-09-15 18:43:37,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633762399] [2024-09-15 18:43:37,548 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:37,548 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2024-09-15 18:43:37,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:37,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2024-09-15 18:43:37,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2594, Invalid=10062, Unknown=0, NotChecked=0, Total=12656 [2024-09-15 18:43:37,550 INFO L87 Difference]: Start difference. First operand 341 states and 427 transitions. Second operand has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 18:43:38,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:38,841 INFO L93 Difference]: Finished difference Result 762 states and 985 transitions. [2024-09-15 18:43:38,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2024-09-15 18:43:38,841 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) Word has length 124 [2024-09-15 18:43:38,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:38,846 INFO L225 Difference]: With dead ends: 762 [2024-09-15 18:43:38,846 INFO L226 Difference]: Without dead ends: 760 [2024-09-15 18:43:38,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 204 SyntacticMatches, 2 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6964 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4040, Invalid=15420, Unknown=0, NotChecked=0, Total=19460 [2024-09-15 18:43:38,847 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 49 mSDsluCounter, 1042 mSDsCounter, 0 mSdLazyCounter, 1910 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 1086 SdHoareTripleChecker+Invalid, 1980 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 1910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:38,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 1086 Invalid, 1980 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 1910 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-15 18:43:38,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-15 18:43:39,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 759. [2024-09-15 18:43:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 759 states, 520 states have (on average 1.0326923076923078) internal successors, (537), 534 states have internal predecessors, (537), 223 states have call successors, (223), 16 states have call predecessors, (223), 15 states have return successors, (222), 208 states have call predecessors, (222), 222 states have call successors, (222) [2024-09-15 18:43:39,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 759 states to 759 states and 982 transitions. [2024-09-15 18:43:39,027 INFO L78 Accepts]: Start accepts. Automaton has 759 states and 982 transitions. Word has length 124 [2024-09-15 18:43:39,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:39,027 INFO L474 AbstractCegarLoop]: Abstraction has 759 states and 982 transitions. [2024-09-15 18:43:39,027 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.3097345132743363) internal successors, (148), 111 states have internal predecessors, (148), 27 states have call successors, (29), 3 states have call predecessors, (29), 1 states have return successors, (25), 25 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 18:43:39,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:39,028 INFO L276 IsEmpty]: Start isEmpty. Operand 759 states and 982 transitions. [2024-09-15 18:43:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-15 18:43:39,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:39,031 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:39,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:39,231 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-15 18:43:39,232 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:39,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:39,232 INFO L85 PathProgramCache]: Analyzing trace with hash 1782177000, now seen corresponding path program 21 times [2024-09-15 18:43:39,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:39,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297376673] [2024-09-15 18:43:39,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:39,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:39,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:40,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-15 18:43:40,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:43:40,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 18:43:40,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 18:43:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-15 18:43:40,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-15 18:43:40,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 18:43:40,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 18:43:40,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 18:43:40,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-15 18:43:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 18:43:40,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-15 18:43:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-15 18:43:40,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-15 18:43:40,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-15 18:43:40,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:40,735 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 317 proven. 194 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-15 18:43:40,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:40,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297376673] [2024-09-15 18:43:40,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297376673] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:40,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620332452] [2024-09-15 18:43:40,736 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:43:40,736 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:40,736 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:40,737 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) [2024-09-15 18:43:40,748 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-15 18:43:40,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-15 18:43:40,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:40,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-15 18:43:40,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:42,336 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-15 18:43:42,336 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:44,788 INFO L134 CoverageAnalysis]: Checked inductivity of 931 backedges. 30 proven. 481 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-15 18:43:44,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620332452] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:44,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:44,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 38] total 107 [2024-09-15 18:43:44,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246127787] [2024-09-15 18:43:44,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:44,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2024-09-15 18:43:44,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:44,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2024-09-15 18:43:44,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1300, Invalid=10042, Unknown=0, NotChecked=0, Total=11342 [2024-09-15 18:43:44,791 INFO L87 Difference]: Start difference. First operand 759 states and 982 transitions. Second operand has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-15 18:43:48,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:48,731 INFO L93 Difference]: Finished difference Result 812 states and 1026 transitions. [2024-09-15 18:43:48,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-15 18:43:48,732 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) Word has length 134 [2024-09-15 18:43:48,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:48,738 INFO L225 Difference]: With dead ends: 812 [2024-09-15 18:43:48,739 INFO L226 Difference]: Without dead ends: 710 [2024-09-15 18:43:48,741 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 230 SyntacticMatches, 3 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5884 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=2595, Invalid=20661, Unknown=0, NotChecked=0, Total=23256 [2024-09-15 18:43:48,743 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 25 mSDsluCounter, 596 mSDsCounter, 0 mSdLazyCounter, 1789 mSolverCounterSat, 123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 621 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 123 IncrementalHoareTripleChecker+Valid, 1789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:48,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 621 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [123 Valid, 1789 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-15 18:43:48,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2024-09-15 18:43:48,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 710. [2024-09-15 18:43:48,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 710 states, 487 states have (on average 1.0328542094455853) internal successors, (503), 500 states have internal predecessors, (503), 208 states have call successors, (208), 15 states have call predecessors, (208), 14 states have return successors, (207), 194 states have call predecessors, (207), 207 states have call successors, (207) [2024-09-15 18:43:48,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 710 states to 710 states and 918 transitions. [2024-09-15 18:43:48,955 INFO L78 Accepts]: Start accepts. Automaton has 710 states and 918 transitions. Word has length 134 [2024-09-15 18:43:48,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:48,956 INFO L474 AbstractCegarLoop]: Abstraction has 710 states and 918 transitions. [2024-09-15 18:43:48,956 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 106 states have (on average 1.509433962264151) internal successors, (160), 105 states have internal predecessors, (160), 47 states have call successors, (49), 3 states have call predecessors, (49), 1 states have return successors, (46), 46 states have call predecessors, (46), 46 states have call successors, (46) [2024-09-15 18:43:48,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 710 states and 918 transitions. [2024-09-15 18:43:48,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-15 18:43:48,960 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:48,960 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:48,977 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-15 18:43:49,160 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-15 18:43:49,161 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:43:49,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:49,161 INFO L85 PathProgramCache]: Analyzing trace with hash -1880897274, now seen corresponding path program 22 times [2024-09-15 18:43:49,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:43:49,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698901800] [2024-09-15 18:43:49,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:43:49,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:43:49,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:43:50,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-15 18:43:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:43:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 18:43:50,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:43:50,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:43:50,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-15 18:43:50,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 18:43:50,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 18:43:50,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-15 18:43:50,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-15 18:43:50,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-15 18:43:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-15 18:43:50,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-15 18:43:50,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-15 18:43:50,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-15 18:43:50,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-15 18:43:50,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:43:50,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 362 proven. 215 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:43:50,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:43:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698901800] [2024-09-15 18:43:50,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698901800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:43:50,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086091308] [2024-09-15 18:43:50,817 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:43:50,817 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:43:50,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:43:50,819 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) [2024-09-15 18:43:50,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-15 18:43:50,886 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:43:50,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:43:50,888 INFO L262 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 76 conjuncts are in the unsatisfiable core [2024-09-15 18:43:50,890 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:43:51,830 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:43:51,830 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:43:54,149 INFO L134 CoverageAnalysis]: Checked inductivity of 1057 backedges. 32 proven. 545 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-15 18:43:54,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086091308] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:43:54,150 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:43:54,150 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 40] total 96 [2024-09-15 18:43:54,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140393675] [2024-09-15 18:43:54,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:43:54,150 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2024-09-15 18:43:54,151 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:43:54,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2024-09-15 18:43:54,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1274, Invalid=7846, Unknown=0, NotChecked=0, Total=9120 [2024-09-15 18:43:54,153 INFO L87 Difference]: Start difference. First operand 710 states and 918 transitions. Second operand has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-15 18:43:59,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:43:59,699 INFO L93 Difference]: Finished difference Result 889 states and 1127 transitions. [2024-09-15 18:43:59,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2024-09-15 18:43:59,699 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) Word has length 142 [2024-09-15 18:43:59,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:43:59,704 INFO L225 Difference]: With dead ends: 889 [2024-09-15 18:43:59,704 INFO L226 Difference]: Without dead ends: 788 [2024-09-15 18:43:59,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 263 SyntacticMatches, 1 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4643 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=2715, Invalid=15107, Unknown=0, NotChecked=0, Total=17822 [2024-09-15 18:43:59,706 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 31 mSDsluCounter, 997 mSDsCounter, 0 mSdLazyCounter, 3766 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1023 SdHoareTripleChecker+Invalid, 3929 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 3766 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:43:59,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1023 Invalid, 3929 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 3766 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-15 18:43:59,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 788 states. [2024-09-15 18:43:59,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 788 to 778. [2024-09-15 18:43:59,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 778 states, 534 states have (on average 1.0355805243445693) internal successors, (553), 547 states have internal predecessors, (553), 228 states have call successors, (228), 16 states have call predecessors, (228), 15 states have return successors, (227), 214 states have call predecessors, (227), 227 states have call successors, (227) [2024-09-15 18:43:59,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 778 states to 778 states and 1008 transitions. [2024-09-15 18:43:59,928 INFO L78 Accepts]: Start accepts. Automaton has 778 states and 1008 transitions. Word has length 142 [2024-09-15 18:43:59,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:43:59,928 INFO L474 AbstractCegarLoop]: Abstraction has 778 states and 1008 transitions. [2024-09-15 18:43:59,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.6) internal successors, (152), 94 states have internal predecessors, (152), 50 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (49), 49 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-15 18:43:59,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:43:59,929 INFO L276 IsEmpty]: Start isEmpty. Operand 778 states and 1008 transitions. [2024-09-15 18:43:59,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-15 18:43:59,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:43:59,932 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:43:59,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-15 18:44:00,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-15 18:44:00,133 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:44:00,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:00,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1580304088, now seen corresponding path program 23 times [2024-09-15 18:44:00,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:44:00,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494691384] [2024-09-15 18:44:00,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:44:00,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:44:00,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:44:01,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-15 18:44:01,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,645 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 18:44:01,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 18:44:01,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 18:44:01,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 18:44:01,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 18:44:01,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 18:44:01,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:44:01,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-15 18:44:01,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-15 18:44:01,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 18:44:01,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-15 18:44:01,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 18:44:01,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-15 18:44:01,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-15 18:44:01,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-15 18:44:01,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-15 18:44:01,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 410 proven. 237 refuted. 0 times theorem prover too weak. 544 trivial. 0 not checked. [2024-09-15 18:44:01,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:44:01,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494691384] [2024-09-15 18:44:01,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494691384] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:44:01,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097833159] [2024-09-15 18:44:01,697 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:44:01,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:01,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:44:01,699 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) [2024-09-15 18:44:01,701 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-15 18:44:01,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-15 18:44:01,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:44:01,776 INFO L262 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 120 conjuncts are in the unsatisfiable core [2024-09-15 18:44:01,778 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:44:03,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-15 18:44:03,599 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:44:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 1191 backedges. 57 proven. 638 refuted. 0 times theorem prover too weak. 496 trivial. 0 not checked. [2024-09-15 18:44:06,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097833159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:44:06,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:44:06,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 122 [2024-09-15 18:44:06,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748001330] [2024-09-15 18:44:06,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:44:06,655 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2024-09-15 18:44:06,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:44:06,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2024-09-15 18:44:06,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1846, Invalid=12916, Unknown=0, NotChecked=0, Total=14762 [2024-09-15 18:44:06,658 INFO L87 Difference]: Start difference. First operand 778 states and 1008 transitions. Second operand has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-15 18:44:14,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:44:14,720 INFO L93 Difference]: Finished difference Result 915 states and 1163 transitions. [2024-09-15 18:44:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2024-09-15 18:44:14,720 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) Word has length 150 [2024-09-15 18:44:14,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:44:14,725 INFO L225 Difference]: With dead ends: 915 [2024-09-15 18:44:14,725 INFO L226 Difference]: Without dead ends: 807 [2024-09-15 18:44:14,727 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 436 GetRequests, 257 SyntacticMatches, 1 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10129 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=4440, Invalid=27780, Unknown=0, NotChecked=0, Total=32220 [2024-09-15 18:44:14,727 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 28 mSDsluCounter, 1038 mSDsCounter, 0 mSdLazyCounter, 4426 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 1064 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 4426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:44:14,728 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 1064 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 4426 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 18:44:14,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 807 states. [2024-09-15 18:44:14,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 807 to 807. [2024-09-15 18:44:14,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 554 states have (on average 1.036101083032491) internal successors, (574), 567 states have internal predecessors, (574), 237 states have call successors, (237), 16 states have call predecessors, (237), 15 states have return successors, (236), 223 states have call predecessors, (236), 236 states have call successors, (236) [2024-09-15 18:44:14,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1047 transitions. [2024-09-15 18:44:14,930 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1047 transitions. Word has length 150 [2024-09-15 18:44:14,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:44:14,931 INFO L474 AbstractCegarLoop]: Abstraction has 807 states and 1047 transitions. [2024-09-15 18:44:14,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.512396694214876) internal successors, (183), 120 states have internal predecessors, (183), 53 states have call successors, (55), 3 states have call predecessors, (55), 2 states have return successors, (52), 52 states have call predecessors, (52), 52 states have call successors, (52) [2024-09-15 18:44:14,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:14,931 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1047 transitions. [2024-09-15 18:44:14,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-09-15 18:44:14,935 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:44:14,935 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:44:14,956 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-15 18:44:15,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:15,136 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:44:15,136 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:15,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1176594234, now seen corresponding path program 24 times [2024-09-15 18:44:15,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:44:15,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037888504] [2024-09-15 18:44:15,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:44:15,137 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:44:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:44:16,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 18:44:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:44:16,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:44:16,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:44:16,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 18:44:16,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 18:44:16,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 18:44:16,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,777 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 18:44:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-15 18:44:16,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-15 18:44:16,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-15 18:44:16,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 18:44:16,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-15 18:44:16,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-15 18:44:16,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-15 18:44:16,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-15 18:44:16,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-15 18:44:16,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-15 18:44:16,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:16,818 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 461 proven. 260 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-15 18:44:16,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:44:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037888504] [2024-09-15 18:44:16,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037888504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:44:16,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051613100] [2024-09-15 18:44:16,818 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:44:16,819 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:16,819 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:44:16,821 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) [2024-09-15 18:44:16,822 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-15 18:44:16,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-15 18:44:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:44:16,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 391 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-15 18:44:16,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:44:18,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-15 18:44:18,041 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:44:20,801 INFO L134 CoverageAnalysis]: Checked inductivity of 1333 backedges. 36 proven. 685 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-15 18:44:20,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051613100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:44:20,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:44:20,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44, 44] total 106 [2024-09-15 18:44:20,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756720433] [2024-09-15 18:44:20,802 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:44:20,802 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2024-09-15 18:44:20,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:44:20,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2024-09-15 18:44:20,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1553, Invalid=9577, Unknown=0, NotChecked=0, Total=11130 [2024-09-15 18:44:20,805 INFO L87 Difference]: Start difference. First operand 807 states and 1047 transitions. Second operand has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-15 18:44:27,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:44:27,427 INFO L93 Difference]: Finished difference Result 956 states and 1213 transitions. [2024-09-15 18:44:27,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-15 18:44:27,428 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) Word has length 158 [2024-09-15 18:44:27,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:44:27,432 INFO L225 Difference]: With dead ends: 956 [2024-09-15 18:44:27,432 INFO L226 Difference]: Without dead ends: 845 [2024-09-15 18:44:27,434 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 293 SyntacticMatches, 1 SemanticMatches, 146 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5700 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=3331, Invalid=18425, Unknown=0, NotChecked=0, Total=21756 [2024-09-15 18:44:27,435 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 29 mSDsluCounter, 1324 mSDsCounter, 0 mSdLazyCounter, 4680 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 1352 SdHoareTripleChecker+Invalid, 4877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 4680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:44:27,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 1352 Invalid, 4877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 4680 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 18:44:27,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 845 states. [2024-09-15 18:44:27,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 845 to 837. [2024-09-15 18:44:27,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 837 states, 575 states have (on average 1.0365217391304349) internal successors, (596), 588 states have internal predecessors, (596), 245 states have call successors, (245), 17 states have call predecessors, (245), 16 states have return successors, (244), 231 states have call predecessors, (244), 244 states have call successors, (244) [2024-09-15 18:44:27,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 837 states to 837 states and 1085 transitions. [2024-09-15 18:44:27,730 INFO L78 Accepts]: Start accepts. Automaton has 837 states and 1085 transitions. Word has length 158 [2024-09-15 18:44:27,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:44:27,731 INFO L474 AbstractCegarLoop]: Abstraction has 837 states and 1085 transitions. [2024-09-15 18:44:27,731 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.6) internal successors, (168), 104 states have internal predecessors, (168), 56 states have call successors, (58), 3 states have call predecessors, (58), 1 states have return successors, (55), 55 states have call predecessors, (55), 55 states have call successors, (55) [2024-09-15 18:44:27,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:27,731 INFO L276 IsEmpty]: Start isEmpty. Operand 837 states and 1085 transitions. [2024-09-15 18:44:27,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2024-09-15 18:44:27,736 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:44:27,736 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:44:27,755 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-15 18:44:27,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-15 18:44:27,937 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:44:27,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:27,937 INFO L85 PathProgramCache]: Analyzing trace with hash -902421144, now seen corresponding path program 25 times [2024-09-15 18:44:27,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:44:27,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100978521] [2024-09-15 18:44:27,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:44:27,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:44:27,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:44:29,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-15 18:44:29,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-15 18:44:29,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-15 18:44:29,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 18:44:29,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 18:44:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-15 18:44:29,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-15 18:44:29,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-15 18:44:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 18:44:29,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 18:44:29,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 99 [2024-09-15 18:44:29,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2024-09-15 18:44:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 113 [2024-09-15 18:44:29,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2024-09-15 18:44:29,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 127 [2024-09-15 18:44:29,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2024-09-15 18:44:29,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 141 [2024-09-15 18:44:29,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2024-09-15 18:44:29,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,819 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 155 [2024-09-15 18:44:29,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,824 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 515 proven. 284 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-15 18:44:29,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:44:29,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100978521] [2024-09-15 18:44:29,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100978521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:44:29,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568133496] [2024-09-15 18:44:29,825 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:44:29,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:29,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:44:29,827 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) [2024-09-15 18:44:29,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-15 18:44:29,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:29,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 85 conjuncts are in the unsatisfiable core [2024-09-15 18:44:29,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:44:31,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-15 18:44:31,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:44:34,226 INFO L134 CoverageAnalysis]: Checked inductivity of 1483 backedges. 38 proven. 761 refuted. 0 times theorem prover too weak. 684 trivial. 0 not checked. [2024-09-15 18:44:34,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568133496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:44:34,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:44:34,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46, 46] total 111 [2024-09-15 18:44:34,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841069505] [2024-09-15 18:44:34,226 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:44:34,227 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2024-09-15 18:44:34,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:44:34,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2024-09-15 18:44:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1703, Invalid=10507, Unknown=0, NotChecked=0, Total=12210 [2024-09-15 18:44:34,229 INFO L87 Difference]: Start difference. First operand 837 states and 1085 transitions. Second operand has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-15 18:44:41,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:44:41,396 INFO L93 Difference]: Finished difference Result 989 states and 1253 transitions. [2024-09-15 18:44:41,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-15 18:44:41,396 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) Word has length 166 [2024-09-15 18:44:41,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:44:41,400 INFO L225 Difference]: With dead ends: 989 [2024-09-15 18:44:41,400 INFO L226 Difference]: Without dead ends: 871 [2024-09-15 18:44:41,402 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 306 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6357 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=3663, Invalid=20207, Unknown=0, NotChecked=0, Total=23870 [2024-09-15 18:44:41,402 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 31 mSDsluCounter, 1191 mSDsCounter, 0 mSdLazyCounter, 4709 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1220 SdHoareTripleChecker+Invalid, 4927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:44:41,403 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1220 Invalid, 4927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4709 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-15 18:44:41,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 871 states. [2024-09-15 18:44:41,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 871 to 864. [2024-09-15 18:44:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 594 states have (on average 1.037037037037037) internal successors, (616), 607 states have internal predecessors, (616), 252 states have call successors, (252), 18 states have call predecessors, (252), 17 states have return successors, (251), 238 states have call predecessors, (251), 251 states have call successors, (251) [2024-09-15 18:44:41,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 1119 transitions. [2024-09-15 18:44:41,708 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 1119 transitions. Word has length 166 [2024-09-15 18:44:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:44:41,708 INFO L474 AbstractCegarLoop]: Abstraction has 864 states and 1119 transitions. [2024-09-15 18:44:41,709 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 110 states have (on average 1.6) internal successors, (176), 109 states have internal predecessors, (176), 59 states have call successors, (61), 3 states have call predecessors, (61), 1 states have return successors, (58), 58 states have call predecessors, (58), 58 states have call successors, (58) [2024-09-15 18:44:41,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:41,709 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 1119 transitions. [2024-09-15 18:44:41,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2024-09-15 18:44:41,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:44:41,713 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:44:41,730 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-15 18:44:41,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-15 18:44:41,913 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:44:41,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:41,914 INFO L85 PathProgramCache]: Analyzing trace with hash 1015830662, now seen corresponding path program 26 times [2024-09-15 18:44:41,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:44:41,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533089044] [2024-09-15 18:44:41,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:44:41,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:44:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:44:43,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-15 18:44:43,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-15 18:44:43,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-15 18:44:43,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 18:44:43,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-15 18:44:43,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-15 18:44:43,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-15 18:44:43,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 18:44:43,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-15 18:44:43,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-15 18:44:43,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 18:44:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 107 [2024-09-15 18:44:43,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,959 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2024-09-15 18:44:43,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 121 [2024-09-15 18:44:43,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2024-09-15 18:44:43,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 135 [2024-09-15 18:44:43,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2024-09-15 18:44:43,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 149 [2024-09-15 18:44:43,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2024-09-15 18:44:43,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 163 [2024-09-15 18:44:43,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:43,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 572 proven. 309 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-15 18:44:43,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:44:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533089044] [2024-09-15 18:44:43,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533089044] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:44:43,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788719685] [2024-09-15 18:44:43,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:44:43,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:43,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:44:43,983 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) [2024-09-15 18:44:43,984 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-15 18:44:44,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:44:44,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:44:44,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 429 conjuncts, 89 conjuncts are in the unsatisfiable core [2024-09-15 18:44:44,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:44:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-15 18:44:45,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:44:48,752 INFO L134 CoverageAnalysis]: Checked inductivity of 1641 backedges. 40 proven. 841 refuted. 0 times theorem prover too weak. 760 trivial. 0 not checked. [2024-09-15 18:44:48,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788719685] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:44:48,752 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:44:48,752 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 48, 48] total 116 [2024-09-15 18:44:48,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527663740] [2024-09-15 18:44:48,752 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:44:48,753 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2024-09-15 18:44:48,753 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:44:48,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2024-09-15 18:44:48,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1860, Invalid=11480, Unknown=0, NotChecked=0, Total=13340 [2024-09-15 18:44:48,755 INFO L87 Difference]: Start difference. First operand 864 states and 1119 transitions. Second operand has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-15 18:44:56,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:44:56,627 INFO L93 Difference]: Finished difference Result 1019 states and 1289 transitions. [2024-09-15 18:44:56,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-15 18:44:56,628 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) Word has length 174 [2024-09-15 18:44:56,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:44:56,632 INFO L225 Difference]: With dead ends: 1019 [2024-09-15 18:44:56,632 INFO L226 Difference]: Without dead ends: 894 [2024-09-15 18:44:56,633 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 484 GetRequests, 321 SyntacticMatches, 3 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6957 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=4011, Invalid=22071, Unknown=0, NotChecked=0, Total=26082 [2024-09-15 18:44:56,634 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 31 mSDsluCounter, 1314 mSDsCounter, 0 mSdLazyCounter, 4929 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1344 SdHoareTripleChecker+Invalid, 5147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 4929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:44:56,634 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1344 Invalid, 5147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 4929 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-15 18:44:56,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 894 states. [2024-09-15 18:44:56,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 894 to 888. [2024-09-15 18:44:56,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 611 states have (on average 1.0376432078559739) internal successors, (634), 624 states have internal predecessors, (634), 258 states have call successors, (258), 19 states have call predecessors, (258), 18 states have return successors, (257), 244 states have call predecessors, (257), 257 states have call successors, (257) [2024-09-15 18:44:56,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 1149 transitions. [2024-09-15 18:44:56,882 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 1149 transitions. Word has length 174 [2024-09-15 18:44:56,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:44:56,883 INFO L474 AbstractCegarLoop]: Abstraction has 888 states and 1149 transitions. [2024-09-15 18:44:56,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.6) internal successors, (184), 114 states have internal predecessors, (184), 62 states have call successors, (64), 3 states have call predecessors, (64), 1 states have return successors, (61), 61 states have call predecessors, (61), 61 states have call successors, (61) [2024-09-15 18:44:56,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:56,883 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 1149 transitions. [2024-09-15 18:44:56,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2024-09-15 18:44:56,887 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:44:56,887 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:44:56,904 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-15 18:44:57,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:57,088 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:44:57,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:44:57,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1982537304, now seen corresponding path program 27 times [2024-09-15 18:44:57,088 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:44:57,088 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352300817] [2024-09-15 18:44:57,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:44:57,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:44:57,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:44:59,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-15 18:44:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-15 18:44:59,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 18:44:59,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-15 18:44:59,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-15 18:44:59,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-15 18:44:59,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-15 18:44:59,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-15 18:44:59,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 18:44:59,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-15 18:44:59,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-15 18:44:59,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2024-09-15 18:44:59,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 115 [2024-09-15 18:44:59,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2024-09-15 18:44:59,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 129 [2024-09-15 18:44:59,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2024-09-15 18:44:59,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 143 [2024-09-15 18:44:59,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2024-09-15 18:44:59,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 157 [2024-09-15 18:44:59,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2024-09-15 18:44:59,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,212 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 171 [2024-09-15 18:44:59,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:44:59,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 632 proven. 335 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-15 18:44:59,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:44:59,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352300817] [2024-09-15 18:44:59,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352300817] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:44:59,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [100180445] [2024-09-15 18:44:59,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:44:59,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:44:59,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:44:59,217 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) [2024-09-15 18:44:59,217 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-15 18:44:59,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-15 18:44:59,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:44:59,323 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-09-15 18:44:59,326 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:45:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-15 18:45:00,795 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:45:04,314 INFO L134 CoverageAnalysis]: Checked inductivity of 1807 backedges. 42 proven. 925 refuted. 0 times theorem prover too weak. 840 trivial. 0 not checked. [2024-09-15 18:45:04,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [100180445] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:45:04,315 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:45:04,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 121 [2024-09-15 18:45:04,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379900520] [2024-09-15 18:45:04,315 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:45:04,316 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2024-09-15 18:45:04,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:45:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2024-09-15 18:45:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2024, Invalid=12496, Unknown=0, NotChecked=0, Total=14520 [2024-09-15 18:45:04,318 INFO L87 Difference]: Start difference. First operand 888 states and 1149 transitions. Second operand has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-15 18:45:13,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:45:13,184 INFO L93 Difference]: Finished difference Result 1042 states and 1318 transitions. [2024-09-15 18:45:13,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2024-09-15 18:45:13,184 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) Word has length 182 [2024-09-15 18:45:13,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:45:13,189 INFO L225 Difference]: With dead ends: 1042 [2024-09-15 18:45:13,190 INFO L226 Difference]: Without dead ends: 910 [2024-09-15 18:45:13,191 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 338 SyntacticMatches, 1 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=4375, Invalid=24017, Unknown=0, NotChecked=0, Total=28392 [2024-09-15 18:45:13,192 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 32 mSDsluCounter, 1421 mSDsCounter, 0 mSdLazyCounter, 5629 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 1452 SdHoareTripleChecker+Invalid, 5868 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 5629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:45:13,192 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 1452 Invalid, 5868 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 5629 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-15 18:45:13,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 910 states. [2024-09-15 18:45:13,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 910 to 905. [2024-09-15 18:45:13,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 905 states, 623 states have (on average 1.0385232744783306) internal successors, (647), 636 states have internal predecessors, (647), 263 states have call successors, (263), 19 states have call predecessors, (263), 18 states have return successors, (262), 249 states have call predecessors, (262), 262 states have call successors, (262) [2024-09-15 18:45:13,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 905 states to 905 states and 1172 transitions. [2024-09-15 18:45:13,475 INFO L78 Accepts]: Start accepts. Automaton has 905 states and 1172 transitions. Word has length 182 [2024-09-15 18:45:13,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:45:13,475 INFO L474 AbstractCegarLoop]: Abstraction has 905 states and 1172 transitions. [2024-09-15 18:45:13,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 1.6) internal successors, (192), 119 states have internal predecessors, (192), 65 states have call successors, (67), 3 states have call predecessors, (67), 1 states have return successors, (64), 64 states have call predecessors, (64), 64 states have call successors, (64) [2024-09-15 18:45:13,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:13,476 INFO L276 IsEmpty]: Start isEmpty. Operand 905 states and 1172 transitions. [2024-09-15 18:45:13,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2024-09-15 18:45:13,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:45:13,480 INFO L216 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:45:13,498 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-15 18:45:13,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-15 18:45:13,681 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:45:13,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:13,681 INFO L85 PathProgramCache]: Analyzing trace with hash 151586886, now seen corresponding path program 28 times [2024-09-15 18:45:13,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:45:13,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130411931] [2024-09-15 18:45:13,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:45:13,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:45:13,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:45:15,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-15 18:45:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-15 18:45:15,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-15 18:45:15,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-15 18:45:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-15 18:45:15,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 18:45:15,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,937 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 18:45:15,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 18:45:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,942 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-15 18:45:15,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-15 18:45:15,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-15 18:45:15,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-15 18:45:15,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2024-09-15 18:45:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 123 [2024-09-15 18:45:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2024-09-15 18:45:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 137 [2024-09-15 18:45:15,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2024-09-15 18:45:15,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 151 [2024-09-15 18:45:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2024-09-15 18:45:15,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 165 [2024-09-15 18:45:15,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2024-09-15 18:45:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:15,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 179 [2024-09-15 18:45:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:16,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 695 proven. 362 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-15 18:45:16,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:45:16,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130411931] [2024-09-15 18:45:16,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130411931] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:45:16,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992922604] [2024-09-15 18:45:16,000 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:45:16,001 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:45:16,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:45:16,002 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) [2024-09-15 18:45:16,002 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-15 18:45:16,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:45:16,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:45:16,082 INFO L262 TraceCheckSpWp]: Trace formula consists of 467 conjuncts, 100 conjuncts are in the unsatisfiable core [2024-09-15 18:45:16,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:45:17,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-15 18:45:17,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:45:21,408 INFO L134 CoverageAnalysis]: Checked inductivity of 1981 backedges. 44 proven. 1013 refuted. 0 times theorem prover too weak. 924 trivial. 0 not checked. [2024-09-15 18:45:21,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [992922604] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:45:21,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:45:21,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52, 52] total 126 [2024-09-15 18:45:21,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964312740] [2024-09-15 18:45:21,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:45:21,409 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2024-09-15 18:45:21,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:45:21,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2024-09-15 18:45:21,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2195, Invalid=13555, Unknown=0, NotChecked=0, Total=15750 [2024-09-15 18:45:21,412 INFO L87 Difference]: Start difference. First operand 905 states and 1172 transitions. Second operand has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-15 18:45:31,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:45:31,126 INFO L93 Difference]: Finished difference Result 1062 states and 1343 transitions. [2024-09-15 18:45:31,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2024-09-15 18:45:31,127 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) Word has length 190 [2024-09-15 18:45:31,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:45:31,131 INFO L225 Difference]: With dead ends: 1062 [2024-09-15 18:45:31,131 INFO L226 Difference]: Without dead ends: 927 [2024-09-15 18:45:31,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 353 SyntacticMatches, 1 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8138 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=4755, Invalid=26045, Unknown=0, NotChecked=0, Total=30800 [2024-09-15 18:45:31,133 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 33 mSDsluCounter, 1617 mSDsCounter, 0 mSdLazyCounter, 6096 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 1649 SdHoareTripleChecker+Invalid, 6379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 6096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:45:31,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 1649 Invalid, 6379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 6096 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2024-09-15 18:45:31,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 927 states. [2024-09-15 18:45:31,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 927 to 923. [2024-09-15 18:45:31,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 923 states, 636 states have (on average 1.0393081761006289) internal successors, (661), 649 states have internal predecessors, (661), 267 states have call successors, (267), 20 states have call predecessors, (267), 19 states have return successors, (266), 253 states have call predecessors, (266), 266 states have call successors, (266) [2024-09-15 18:45:31,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 923 states to 923 states and 1194 transitions. [2024-09-15 18:45:31,411 INFO L78 Accepts]: Start accepts. Automaton has 923 states and 1194 transitions. Word has length 190 [2024-09-15 18:45:31,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:45:31,411 INFO L474 AbstractCegarLoop]: Abstraction has 923 states and 1194 transitions. [2024-09-15 18:45:31,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.6) internal successors, (200), 124 states have internal predecessors, (200), 68 states have call successors, (70), 3 states have call predecessors, (70), 1 states have return successors, (67), 67 states have call predecessors, (67), 67 states have call successors, (67) [2024-09-15 18:45:31,412 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:31,412 INFO L276 IsEmpty]: Start isEmpty. Operand 923 states and 1194 transitions. [2024-09-15 18:45:31,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2024-09-15 18:45:31,416 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:45:31,416 INFO L216 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:45:31,434 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-15 18:45:31,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:45:31,617 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:45:31,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:31,618 INFO L85 PathProgramCache]: Analyzing trace with hash -2012303896, now seen corresponding path program 29 times [2024-09-15 18:45:31,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:45:31,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460960167] [2024-09-15 18:45:31,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:45:31,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:45:31,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:45:34,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 18:45:34,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 18:45:34,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-15 18:45:34,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,042 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-15 18:45:34,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-15 18:45:34,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-15 18:45:34,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 18:45:34,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-15 18:45:34,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-15 18:45:34,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-15 18:45:34,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-15 18:45:34,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-15 18:45:34,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-15 18:45:34,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2024-09-15 18:45:34,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 131 [2024-09-15 18:45:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2024-09-15 18:45:34,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 145 [2024-09-15 18:45:34,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2024-09-15 18:45:34,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 159 [2024-09-15 18:45:34,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2024-09-15 18:45:34,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 173 [2024-09-15 18:45:34,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2024-09-15 18:45:34,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 187 [2024-09-15 18:45:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 761 proven. 390 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-15 18:45:34,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:45:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460960167] [2024-09-15 18:45:34,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460960167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:45:34,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750827066] [2024-09-15 18:45:34,097 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:45:34,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:45:34,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:45:34,099 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) [2024-09-15 18:45:34,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-15 18:45:34,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-15 18:45:34,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:45:34,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 486 conjuncts, 101 conjuncts are in the unsatisfiable core [2024-09-15 18:45:34,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:45:35,863 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-15 18:45:35,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:45:39,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2163 backedges. 46 proven. 1105 refuted. 0 times theorem prover too weak. 1012 trivial. 0 not checked. [2024-09-15 18:45:39,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750827066] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:45:39,976 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:45:39,976 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 54, 54] total 131 [2024-09-15 18:45:39,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85935047] [2024-09-15 18:45:39,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:45:39,976 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2024-09-15 18:45:39,976 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:45:39,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2024-09-15 18:45:39,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2373, Invalid=14657, Unknown=0, NotChecked=0, Total=17030 [2024-09-15 18:45:39,978 INFO L87 Difference]: Start difference. First operand 923 states and 1194 transitions. Second operand has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-15 18:45:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:45:50,578 INFO L93 Difference]: Finished difference Result 1083 states and 1367 transitions. [2024-09-15 18:45:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-15 18:45:50,579 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) Word has length 198 [2024-09-15 18:45:50,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:45:50,583 INFO L225 Difference]: With dead ends: 1083 [2024-09-15 18:45:50,584 INFO L226 Difference]: Without dead ends: 941 [2024-09-15 18:45:50,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 550 GetRequests, 366 SyntacticMatches, 3 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8919 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=5151, Invalid=28155, Unknown=0, NotChecked=0, Total=33306 [2024-09-15 18:45:50,586 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 35 mSDsluCounter, 1641 mSDsCounter, 0 mSdLazyCounter, 6396 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1674 SdHoareTripleChecker+Invalid, 6704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 6396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:45:50,586 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1674 Invalid, 6704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 6396 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-15 18:45:50,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 941 states. [2024-09-15 18:45:50,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 941 to 938. [2024-09-15 18:45:50,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 938 states, 647 states have (on average 1.0401854714064915) internal successors, (673), 660 states have internal predecessors, (673), 270 states have call successors, (270), 21 states have call predecessors, (270), 20 states have return successors, (269), 256 states have call predecessors, (269), 269 states have call successors, (269) [2024-09-15 18:45:50,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 938 states to 938 states and 1212 transitions. [2024-09-15 18:45:50,870 INFO L78 Accepts]: Start accepts. Automaton has 938 states and 1212 transitions. Word has length 198 [2024-09-15 18:45:50,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:45:50,870 INFO L474 AbstractCegarLoop]: Abstraction has 938 states and 1212 transitions. [2024-09-15 18:45:50,870 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 130 states have (on average 1.6) internal successors, (208), 129 states have internal predecessors, (208), 71 states have call successors, (73), 3 states have call predecessors, (73), 1 states have return successors, (70), 70 states have call predecessors, (70), 70 states have call successors, (70) [2024-09-15 18:45:50,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:50,870 INFO L276 IsEmpty]: Start isEmpty. Operand 938 states and 1212 transitions. [2024-09-15 18:45:50,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2024-09-15 18:45:50,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:45:50,874 INFO L216 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:45:50,890 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-15 18:45:51,074 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-15 18:45:51,074 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:45:51,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:45:51,075 INFO L85 PathProgramCache]: Analyzing trace with hash -277829626, now seen corresponding path program 30 times [2024-09-15 18:45:51,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:45:51,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812391035] [2024-09-15 18:45:51,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:45:51,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:45:51,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,651 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:45:53,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-15 18:45:53,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-15 18:45:53,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-15 18:45:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-15 18:45:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 18:45:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-15 18:45:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-15 18:45:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-15 18:45:53,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-15 18:45:53,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-15 18:45:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-15 18:45:53,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 18:45:53,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-15 18:45:53,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-15 18:45:53,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2024-09-15 18:45:53,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 139 [2024-09-15 18:45:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2024-09-15 18:45:53,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 153 [2024-09-15 18:45:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2024-09-15 18:45:53,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 167 [2024-09-15 18:45:53,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,726 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2024-09-15 18:45:53,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 181 [2024-09-15 18:45:53,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2024-09-15 18:45:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 195 [2024-09-15 18:45:53,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:45:53,743 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 830 proven. 419 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-15 18:45:53,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:45:53,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812391035] [2024-09-15 18:45:53,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812391035] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:45:53,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757039911] [2024-09-15 18:45:53,744 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:45:53,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:45:53,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:45:53,746 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) [2024-09-15 18:45:53,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-15 18:45:53,857 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2024-09-15 18:45:53,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:45:53,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 81 conjuncts are in the unsatisfiable core [2024-09-15 18:45:53,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:45:57,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-15 18:45:57,032 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:01,910 INFO L134 CoverageAnalysis]: Checked inductivity of 2353 backedges. 48 proven. 1201 refuted. 0 times theorem prover too weak. 1104 trivial. 0 not checked. [2024-09-15 18:46:01,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757039911] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:01,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:01,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 56, 56] total 161 [2024-09-15 18:46:01,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450809818] [2024-09-15 18:46:01,911 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:01,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 161 states [2024-09-15 18:46:01,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:01,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 161 interpolants. [2024-09-15 18:46:01,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2911, Invalid=22849, Unknown=0, NotChecked=0, Total=25760 [2024-09-15 18:46:01,916 INFO L87 Difference]: Start difference. First operand 938 states and 1212 transitions. Second operand has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-15 18:46:12,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:12,656 INFO L93 Difference]: Finished difference Result 1019 states and 1277 transitions. [2024-09-15 18:46:12,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2024-09-15 18:46:12,657 INFO L78 Accepts]: Start accepts. Automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) Word has length 206 [2024-09-15 18:46:12,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:12,662 INFO L225 Difference]: With dead ends: 1019 [2024-09-15 18:46:12,662 INFO L226 Difference]: Without dead ends: 866 [2024-09-15 18:46:12,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 591 GetRequests, 356 SyntacticMatches, 3 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14020 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=5952, Invalid=48570, Unknown=0, NotChecked=0, Total=54522 [2024-09-15 18:46:12,666 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 31 mSDsluCounter, 1367 mSDsCounter, 0 mSdLazyCounter, 3929 mSolverCounterSat, 329 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 1401 SdHoareTripleChecker+Invalid, 4258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 329 IncrementalHoareTripleChecker+Valid, 3929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:12,666 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 1401 Invalid, 4258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [329 Valid, 3929 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-15 18:46:12,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 866 states. [2024-09-15 18:46:12,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 866 to 866. [2024-09-15 18:46:12,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 599 states have (on average 1.0417362270450752) internal successors, (624), 611 states have internal predecessors, (624), 246 states have call successors, (246), 21 states have call predecessors, (246), 20 states have return successors, (245), 233 states have call predecessors, (245), 245 states have call successors, (245) [2024-09-15 18:46:12,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1115 transitions. [2024-09-15 18:46:12,983 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1115 transitions. Word has length 206 [2024-09-15 18:46:12,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:12,983 INFO L474 AbstractCegarLoop]: Abstraction has 866 states and 1115 transitions. [2024-09-15 18:46:12,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 161 states, 160 states have (on average 1.50625) internal successors, (241), 159 states have internal predecessors, (241), 74 states have call successors, (76), 3 states have call predecessors, (76), 1 states have return successors, (73), 73 states have call predecessors, (73), 73 states have call successors, (73) [2024-09-15 18:46:12,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:12,984 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1115 transitions. [2024-09-15 18:46:12,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2024-09-15 18:46:12,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:12,986 INFO L216 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:12,999 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-15 18:46:13,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-15 18:46:13,186 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:13,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:13,187 INFO L85 PathProgramCache]: Analyzing trace with hash -1387820504, now seen corresponding path program 31 times [2024-09-15 18:46:13,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:13,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384041912] [2024-09-15 18:46:13,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:13,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:13,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:15,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-15 18:46:15,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-15 18:46:15,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-15 18:46:15,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-15 18:46:15,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-15 18:46:15,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 18:46:15,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-15 18:46:15,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2024-09-15 18:46:15,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 91 [2024-09-15 18:46:15,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-15 18:46:15,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,994 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 18:46:15,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2024-09-15 18:46:15,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:15,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 119 [2024-09-15 18:46:15,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2024-09-15 18:46:16,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 133 [2024-09-15 18:46:16,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2024-09-15 18:46:16,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 147 [2024-09-15 18:46:16,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2024-09-15 18:46:16,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 161 [2024-09-15 18:46:16,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2024-09-15 18:46:16,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 175 [2024-09-15 18:46:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2024-09-15 18:46:16,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 189 [2024-09-15 18:46:16,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2024-09-15 18:46:16,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 203 [2024-09-15 18:46:16,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2551 backedges. 902 proven. 449 refuted. 0 times theorem prover too weak. 1200 trivial. 0 not checked. [2024-09-15 18:46:16,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:16,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384041912] [2024-09-15 18:46:16,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384041912] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:16,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499519063] [2024-09-15 18:46:16,038 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:46:16,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:16,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:16,039 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) [2024-09-15 18:46:16,040 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-15 18:46:16,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:16,126 INFO L262 TraceCheckSpWp]: Trace formula consists of 524 conjuncts, 109 conjuncts are in the unsatisfiable core [2024-09-15 18:46:16,130 INFO L285 TraceCheckSpWp]: Computing forward predicates...