./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de32.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version ca4ee3dd Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de32.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-ca4ee3d-m [2024-09-20 18:50:18,658 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 18:50:18,724 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 18:50:18,733 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 18:50:18,733 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 18:50:18,760 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 18:50:18,760 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 18:50:18,760 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 18:50:18,761 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 18:50:18,761 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 18:50:18,761 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 18:50:18,762 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 18:50:18,762 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 18:50:18,762 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 18:50:18,763 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 18:50:18,763 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 18:50:18,763 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 18:50:18,764 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 18:50:18,764 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 18:50:18,764 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 18:50:18,764 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 18:50:18,765 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 18:50:18,765 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 18:50:18,765 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 18:50:18,766 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 18:50:18,766 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 18:50:18,766 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 18:50:18,766 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 18:50:18,767 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 18:50:18,767 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 18:50:18,767 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 18:50:18,767 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 18:50:18,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:18,768 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 18:50:18,768 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 18:50:18,768 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 18:50:18,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 18:50:18,769 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 18:50:18,769 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 18:50:18,769 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 18:50:18,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 18:50:18,770 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 18:50:18,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> be02771c62bfe2ce14e3e1aa527948281d29318788bbe261fd0d537b1dc5e291 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 18:50:18,957 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 18:50:18,986 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 18:50:18,989 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 18:50:18,991 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 18:50:18,991 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 18:50:18,992 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-20 18:50:20,293 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 18:50:20,465 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 18:50:20,465 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c [2024-09-20 18:50:20,471 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/814361a95/7db3b91d9c864644a89687d892c3e0ae/FLAG981251021 [2024-09-20 18:50:20,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/814361a95/7db3b91d9c864644a89687d892c3e0ae [2024-09-20 18:50:20,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 18:50:20,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 18:50:20,486 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:20,486 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 18:50:20,490 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 18:50:20,491 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,492 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c782aeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20, skipping insertion in model container [2024-09-20 18:50:20,492 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,504 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 18:50:20,615 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-09-20 18:50:20,628 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:20,637 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 18:50:20,647 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de32.c[368,381] [2024-09-20 18:50:20,650 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 18:50:20,664 INFO L204 MainTranslator]: Completed translation [2024-09-20 18:50:20,665 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20 WrapperNode [2024-09-20 18:50:20,665 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 18:50:20,666 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:20,667 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 18:50:20,667 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 18:50:20,672 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,677 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,682 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 18:50:20,683 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 18:50:20,683 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 18:50:20,683 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 18:50:20,683 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 18:50:20,691 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,691 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,692 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,701 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-20 18:50:20,701 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,702 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,707 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,709 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,710 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,711 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,712 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 18:50:20,715 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 18:50:20,715 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 18:50:20,715 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 18:50:20,716 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (1/1) ... [2024-09-20 18:50:20,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 18:50:20,731 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:20,743 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-20 18:50:20,751 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-20 18:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 18:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 18:50:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 18:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 18:50:20,786 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 18:50:20,786 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 18:50:20,787 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 18:50:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 18:50:20,788 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 18:50:20,788 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 18:50:20,836 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 18:50:20,838 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 18:50:20,930 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-20 18:50:20,930 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 18:50:20,943 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 18:50:20,944 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-20 18:50:20,944 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:20 BoogieIcfgContainer [2024-09-20 18:50:20,944 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 18:50:20,972 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 18:50:20,972 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 18:50:20,974 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 18:50:20,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 06:50:20" (1/3) ... [2024-09-20 18:50:20,977 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5a31e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:20, skipping insertion in model container [2024-09-20 18:50:20,977 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 06:50:20" (2/3) ... [2024-09-20 18:50:20,982 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3a5a31e1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 06:50:20, skipping insertion in model container [2024-09-20 18:50:20,982 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 06:50:20" (3/3) ... [2024-09-20 18:50:20,984 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de32.c [2024-09-20 18:50:21,011 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 18:50:21,012 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 18:50:21,082 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 18:50:21,087 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;@3831d840, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 18:50:21,087 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 18:50:21,091 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-20 18:50:21,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:50:21,097 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,097 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,098 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:21,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,103 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-20 18:50:21,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:21,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345073745] [2024-09-20 18:50:21,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:21,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:21,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:21,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:21,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345073745] [2024-09-20 18:50:21,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345073745] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:21,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:21,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 18:50:21,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761405859] [2024-09-20 18:50:21,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:21,224 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 18:50:21,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:21,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 18:50:21,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:50:21,247 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2024-09-20 18:50:21,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:21,269 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-20 18:50:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 18:50:21,271 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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 [2024-09-20 18:50:21,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:21,275 INFO L225 Difference]: With dead ends: 34 [2024-09-20 18:50:21,275 INFO L226 Difference]: Without dead ends: 14 [2024-09-20 18:50:21,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 18:50:21,279 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:21,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:21,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-20 18:50:21,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-20 18:50:21,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-20 18:50:21,304 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-20 18:50:21,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:21,305 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-20 18:50:21,305 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 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) [2024-09-20 18:50:21,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,305 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-20 18:50:21,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-20 18:50:21,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,306 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 18:50:21,306 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:21,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,307 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-20 18:50:21,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:21,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918210679] [2024-09-20 18:50:21,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,534 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:21,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:21,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918210679] [2024-09-20 18:50:21,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918210679] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:21,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:21,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-20 18:50:21,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777976732] [2024-09-20 18:50:21,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:21,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 18:50:21,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 18:50:21,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:21,550 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-09-20 18:50:21,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:21,600 INFO L93 Difference]: Finished difference Result 21 states and 24 transitions. [2024-09-20 18:50:21,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-20 18:50:21,600 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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 [2024-09-20 18:50:21,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:21,601 INFO L225 Difference]: With dead ends: 21 [2024-09-20 18:50:21,601 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 18:50:21,601 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-20 18:50:21,602 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:21,602 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 42 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:21,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 18:50:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 18:50:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-20 18:50:21,606 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 13 [2024-09-20 18:50:21,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:21,607 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-20 18:50:21,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 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) [2024-09-20 18:50:21,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,608 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-20 18:50:21,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:50:21,608 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,609 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 18:50:21,609 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:21,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-20 18:50:21,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:21,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657394559] [2024-09-20 18:50:21,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:21,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:21,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:21,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657394559] [2024-09-20 18:50:21,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657394559] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:21,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:21,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-20 18:50:21,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778237693] [2024-09-20 18:50:21,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:21,681 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-20 18:50:21,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:21,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-20 18:50:21,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:50:21,682 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:21,707 INFO L93 Difference]: Finished difference Result 28 states and 35 transitions. [2024-09-20 18:50:21,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-20 18:50:21,708 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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 14 [2024-09-20 18:50:21,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:21,709 INFO L225 Difference]: With dead ends: 28 [2024-09-20 18:50:21,709 INFO L226 Difference]: Without dead ends: 21 [2024-09-20 18:50:21,709 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-20 18:50:21,710 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:21,710 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:21,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-20 18:50:21,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-20 18:50:21,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-20 18:50:21,717 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-20 18:50:21,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:21,717 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-20 18:50:21,717 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,718 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-20 18:50:21,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-20 18:50:21,718 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,718 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-20 18:50:21,719 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:21,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1074026954, now seen corresponding path program 1 times [2024-09-20 18:50:21,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:21,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140616243] [2024-09-20 18:50:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:21,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:21,768 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:21,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140616243] [2024-09-20 18:50:21,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140616243] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 18:50:21,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 18:50:21,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-20 18:50:21,769 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809920733] [2024-09-20 18:50:21,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:21,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:50:21,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:21,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:50:21,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 18:50:21,770 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:21,789 INFO L93 Difference]: Finished difference Result 26 states and 30 transitions. [2024-09-20 18:50:21,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:50:21,789 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 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 14 [2024-09-20 18:50:21,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:21,790 INFO L225 Difference]: With dead ends: 26 [2024-09-20 18:50:21,790 INFO L226 Difference]: Without dead ends: 17 [2024-09-20 18:50:21,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-20 18:50:21,791 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:21,791 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 33 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:21,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-20 18:50:21,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-20 18:50:21,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 20 transitions. [2024-09-20 18:50:21,794 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 20 transitions. Word has length 14 [2024-09-20 18:50:21,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:21,795 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 20 transitions. [2024-09-20 18:50:21,795 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,795 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 20 transitions. [2024-09-20 18:50:21,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:50:21,796 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,796 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,796 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-20 18:50:21,796 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:21,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,796 INFO L85 PathProgramCache]: Analyzing trace with hash 161814611, now seen corresponding path program 1 times [2024-09-20 18:50:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:21,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736076243] [2024-09-20 18:50:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:21,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:21,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736076243] [2024-09-20 18:50:21,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736076243] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:21,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [106503333] [2024-09-20 18:50:21,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:21,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:21,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:21,858 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:21,860 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 18:50:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:21,894 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:50:21,897 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:21,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:21,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:21,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [106503333] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:21,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:50:21,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-20 18:50:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44889714] [2024-09-20 18:50:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:21,956 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:50:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:21,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:50:21,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:21,957 INFO L87 Difference]: Start difference. First operand 17 states and 20 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:21,975 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2024-09-20 18:50:21,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:50:21,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2024-09-20 18:50:21,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:21,976 INFO L225 Difference]: With dead ends: 23 [2024-09-20 18:50:21,976 INFO L226 Difference]: Without dead ends: 16 [2024-09-20 18:50:21,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:21,977 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:21,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:21,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-20 18:50:21,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-20 18:50:21,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2024-09-20 18:50:21,981 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2024-09-20 18:50:21,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:21,981 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2024-09-20 18:50:21,981 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:21,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:21,982 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2024-09-20 18:50:21,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-20 18:50:21,982 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:21,982 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:21,995 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:22,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:22,187 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:22,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:22,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1564643010, now seen corresponding path program 1 times [2024-09-20 18:50:22,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:22,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848263093] [2024-09-20 18:50:22,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:22,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:22,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:22,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:22,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:22,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848263093] [2024-09-20 18:50:22,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848263093] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:22,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662703184] [2024-09-20 18:50:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:22,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:22,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:22,240 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:22,243 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 18:50:22,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:50:22,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:22,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:22,315 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:22,355 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:22,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662703184] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:22,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-20 18:50:22,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-20 18:50:22,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189408957] [2024-09-20 18:50:22,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 18:50:22,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 18:50:22,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:22,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 18:50:22,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:22,357 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:22,374 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2024-09-20 18:50:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 18:50:22,377 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 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 15 [2024-09-20 18:50:22,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:22,377 INFO L225 Difference]: With dead ends: 22 [2024-09-20 18:50:22,377 INFO L226 Difference]: Without dead ends: 17 [2024-09-20 18:50:22,378 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:22,378 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 22 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:22,378 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:22,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-20 18:50:22,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-20 18:50:22,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2024-09-20 18:50:22,384 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 15 [2024-09-20 18:50:22,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:22,385 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2024-09-20 18:50:22,385 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2024-09-20 18:50:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 18:50:22,385 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:22,385 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:22,399 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:22,586 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-20 18:50:22,587 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:22,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:22,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-20 18:50:22,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:22,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766911274] [2024-09-20 18:50:22,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:22,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:22,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:22,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:22,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766911274] [2024-09-20 18:50:22,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766911274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:22,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75901375] [2024-09-20 18:50:22,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:22,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:22,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:22,725 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:22,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 18:50:22,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:22,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-20 18:50:22,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:22,836 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:22,836 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:22,878 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:22,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75901375] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:22,879 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:22,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-20 18:50:22,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18158945] [2024-09-20 18:50:22,879 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:22,879 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:50:22,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:22,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:50:22,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:22,880 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:22,914 INFO L93 Difference]: Finished difference Result 25 states and 28 transitions. [2024-09-20 18:50:22,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-20 18:50:22,915 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 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 16 [2024-09-20 18:50:22,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:22,915 INFO L225 Difference]: With dead ends: 25 [2024-09-20 18:50:22,915 INFO L226 Difference]: Without dead ends: 20 [2024-09-20 18:50:22,915 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:50:22,916 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 2 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:22,916 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 51 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:22,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-20 18:50:22,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2024-09-20 18:50:22,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-09-20 18:50:22,919 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 16 [2024-09-20 18:50:22,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:22,920 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-09-20 18:50:22,920 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 6 states have internal predecessors, (14), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:22,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:22,920 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-09-20 18:50:22,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:50:22,920 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:22,921 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:22,934 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:23,121 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 18:50:23,122 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:23,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:23,122 INFO L85 PathProgramCache]: Analyzing trace with hash 1520587586, now seen corresponding path program 2 times [2024-09-20 18:50:23,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:23,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505488076] [2024-09-20 18:50:23,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:23,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:23,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,166 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505488076] [2024-09-20 18:50:23,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505488076] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:23,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461508764] [2024-09-20 18:50:23,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:23,167 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:23,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:23,168 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:23,171 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 18:50:23,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:23,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:23,200 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-20 18:50:23,201 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:23,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,254 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:23,384 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461508764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:23,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:23,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-09-20 18:50:23,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381529946] [2024-09-20 18:50:23,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:23,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 18:50:23,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:23,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 18:50:23,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-20 18:50:23,386 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:23,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:23,462 INFO L93 Difference]: Finished difference Result 60 states and 79 transitions. [2024-09-20 18:50:23,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:50:23,463 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 18:50:23,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:23,465 INFO L225 Difference]: With dead ends: 60 [2024-09-20 18:50:23,466 INFO L226 Difference]: Without dead ends: 52 [2024-09-20 18:50:23,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:50:23,467 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 12 mSDsluCounter, 65 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:23,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 82 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:23,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-20 18:50:23,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2024-09-20 18:50:23,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:23,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 55 transitions. [2024-09-20 18:50:23,482 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 55 transitions. Word has length 17 [2024-09-20 18:50:23,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:23,482 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 55 transitions. [2024-09-20 18:50:23,482 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 8 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:23,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:23,482 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 55 transitions. [2024-09-20 18:50:23,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 18:50:23,483 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:23,484 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:23,496 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:23,687 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:23,688 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:23,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:23,689 INFO L85 PathProgramCache]: Analyzing trace with hash 2058594995, now seen corresponding path program 3 times [2024-09-20 18:50:23,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:23,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029621827] [2024-09-20 18:50:23,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:23,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:23,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:23,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:23,755 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029621827] [2024-09-20 18:50:23,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029621827] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:23,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956248721] [2024-09-20 18:50:23,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:23,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:23,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:23,758 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:23,760 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 18:50:23,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 18:50:23,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:23,791 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 18:50:23,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:23,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:23,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:23,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956248721] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:23,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:23,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-20 18:50:23,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116643678] [2024-09-20 18:50:23,878 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:23,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 18:50:23,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:23,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 18:50:23,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:50:23,879 INFO L87 Difference]: Start difference. First operand 42 states and 55 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:24,007 INFO L93 Difference]: Finished difference Result 56 states and 72 transitions. [2024-09-20 18:50:24,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:50:24,008 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 18:50:24,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:24,008 INFO L225 Difference]: With dead ends: 56 [2024-09-20 18:50:24,009 INFO L226 Difference]: Without dead ends: 41 [2024-09-20 18:50:24,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:50:24,009 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:24,010 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 79 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:24,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-20 18:50:24,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 39. [2024-09-20 18:50:24,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 51 transitions. [2024-09-20 18:50:24,019 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 51 transitions. Word has length 17 [2024-09-20 18:50:24,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:24,019 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 51 transitions. [2024-09-20 18:50:24,019 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:24,020 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 51 transitions. [2024-09-20 18:50:24,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 18:50:24,020 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:24,020 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:24,035 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 18:50:24,220 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:24,221 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:24,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:24,222 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 4 times [2024-09-20 18:50:24,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:24,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971386043] [2024-09-20 18:50:24,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:24,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:24,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971386043] [2024-09-20 18:50:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971386043] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:24,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107934594] [2024-09-20 18:50:24,503 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:50:24,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:24,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:24,505 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:24,510 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 18:50:24,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:50:24,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:24,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:50:24,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:24,600 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:24,600 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:24,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:24,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107934594] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:24,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:24,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-20 18:50:24,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934913910] [2024-09-20 18:50:24,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:24,657 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 18:50:24,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:24,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 18:50:24,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-09-20 18:50:24,659 INFO L87 Difference]: Start difference. First operand 39 states and 51 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:24,718 INFO L93 Difference]: Finished difference Result 59 states and 76 transitions. [2024-09-20 18:50:24,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 18:50:24,719 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 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 19 [2024-09-20 18:50:24,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:24,720 INFO L225 Difference]: With dead ends: 59 [2024-09-20 18:50:24,720 INFO L226 Difference]: Without dead ends: 54 [2024-09-20 18:50:24,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 33 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:50:24,721 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:24,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 87 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:24,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-20 18:50:24,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2024-09-20 18:50:24,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.4166666666666667) internal successors, (51), 36 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 55 transitions. [2024-09-20 18:50:24,732 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 55 transitions. Word has length 19 [2024-09-20 18:50:24,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:24,732 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 55 transitions. [2024-09-20 18:50:24,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 7 states have internal predecessors, (16), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:24,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:24,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 55 transitions. [2024-09-20 18:50:24,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:50:24,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:24,733 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:24,745 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 18:50:24,933 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-20 18:50:24,934 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:24,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:24,935 INFO L85 PathProgramCache]: Analyzing trace with hash 1911342567, now seen corresponding path program 5 times [2024-09-20 18:50:24,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:24,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812744160] [2024-09-20 18:50:24,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:24,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:24,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:24,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:24,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:24,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:24,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812744160] [2024-09-20 18:50:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812744160] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325907388] [2024-09-20 18:50:24,993 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:24,993 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:24,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:24,994 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:24,998 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 18:50:25,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:50:25,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:25,032 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 18:50:25,033 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:25,052 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:25,052 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:25,106 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:25,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325907388] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:25,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:25,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 10 [2024-09-20 18:50:25,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184596669] [2024-09-20 18:50:25,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:25,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 18:50:25,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:25,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 18:50:25,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:50:25,108 INFO L87 Difference]: Start difference. First operand 41 states and 55 transitions. Second operand has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:25,229 INFO L93 Difference]: Finished difference Result 88 states and 119 transitions. [2024-09-20 18:50:25,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 18:50:25,229 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 18:50:25,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:25,230 INFO L225 Difference]: With dead ends: 88 [2024-09-20 18:50:25,230 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 18:50:25,231 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:25,231 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 24 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:25,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:25,232 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 18:50:25,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-20 18:50:25,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.4) internal successors, (77), 55 states have internal predecessors, (77), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 81 transitions. [2024-09-20 18:50:25,248 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 81 transitions. Word has length 20 [2024-09-20 18:50:25,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:25,249 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 81 transitions. [2024-09-20 18:50:25,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.8) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:25,249 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 81 transitions. [2024-09-20 18:50:25,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:50:25,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:25,250 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:25,265 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-20 18:50:25,450 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:25,451 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:25,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1409703062, now seen corresponding path program 6 times [2024-09-20 18:50:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:25,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730311631] [2024-09-20 18:50:25,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:25,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:25,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:25,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:25,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:25,521 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:25,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730311631] [2024-09-20 18:50:25,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730311631] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:25,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897409504] [2024-09-20 18:50:25,521 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:25,522 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:25,522 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:25,523 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:25,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 18:50:25,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-20 18:50:25,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:25,556 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 18:50:25,557 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:25,590 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:25,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:25,677 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 18:50:25,677 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897409504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:25,678 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:25,678 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-20 18:50:25,678 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1263026974] [2024-09-20 18:50:25,678 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:25,678 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:50:25,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:25,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:50:25,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:50:25,679 INFO L87 Difference]: Start difference. First operand 60 states and 81 transitions. Second operand has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:25,788 INFO L93 Difference]: Finished difference Result 80 states and 104 transitions. [2024-09-20 18:50:25,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 18:50:25,789 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 18:50:25,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:25,790 INFO L225 Difference]: With dead ends: 80 [2024-09-20 18:50:25,790 INFO L226 Difference]: Without dead ends: 67 [2024-09-20 18:50:25,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:50:25,790 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 33 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:25,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 88 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:25,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-20 18:50:25,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 43. [2024-09-20 18:50:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-20 18:50:25,800 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 20 [2024-09-20 18:50:25,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:25,800 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-20 18:50:25,812 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:25,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:25,812 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-20 18:50:25,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 18:50:25,813 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:25,813 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:25,825 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-20 18:50:26,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:26,017 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:26,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:26,018 INFO L85 PathProgramCache]: Analyzing trace with hash -457266714, now seen corresponding path program 7 times [2024-09-20 18:50:26,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:26,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087154911] [2024-09-20 18:50:26,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:26,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:26,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:26,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:26,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:26,085 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:26,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087154911] [2024-09-20 18:50:26,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087154911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:26,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112663340] [2024-09-20 18:50:26,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:26,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:26,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:26,087 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:26,088 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 18:50:26,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:26,117 INFO L262 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:50:26,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:26,141 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:26,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-20 18:50:26,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112663340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:26,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:26,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-20 18:50:26,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523638814] [2024-09-20 18:50:26,196 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:26,196 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 18:50:26,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:26,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 18:50:26,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:50:26,197 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:26,280 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2024-09-20 18:50:26,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:50:26,281 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 18:50:26,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:26,281 INFO L225 Difference]: With dead ends: 61 [2024-09-20 18:50:26,281 INFO L226 Difference]: Without dead ends: 48 [2024-09-20 18:50:26,282 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:26,282 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:26,282 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 87 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:26,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-20 18:50:26,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-20 18:50:26,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.2790697674418605) internal successors, (55), 43 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 59 transitions. [2024-09-20 18:50:26,293 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 59 transitions. Word has length 20 [2024-09-20 18:50:26,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:26,293 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 59 transitions. [2024-09-20 18:50:26,293 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7857142857142858) internal successors, (25), 14 states have internal predecessors, (25), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:26,293 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 59 transitions. [2024-09-20 18:50:26,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-20 18:50:26,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:26,294 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:26,305 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 18:50:26,494 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-20 18:50:26,494 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:26,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:26,495 INFO L85 PathProgramCache]: Analyzing trace with hash -2034432077, now seen corresponding path program 8 times [2024-09-20 18:50:26,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:26,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250936643] [2024-09-20 18:50:26,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:26,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:26,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:26,587 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:26,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:26,590 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 18:50:26,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:26,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250936643] [2024-09-20 18:50:26,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1250936643] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:26,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [881361689] [2024-09-20 18:50:26,590 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:26,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:26,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:26,593 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:26,594 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 18:50:26,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:26,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:26,627 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:50:26,628 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:26,659 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:26,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:26,720 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:50:26,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [881361689] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:26,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:26,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-20 18:50:26,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246474226] [2024-09-20 18:50:26,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:26,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:50:26,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:26,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:50:26,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:50:26,721 INFO L87 Difference]: Start difference. First operand 48 states and 59 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:26,870 INFO L93 Difference]: Finished difference Result 75 states and 93 transitions. [2024-09-20 18:50:26,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:50:26,871 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-20 18:50:26,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:26,872 INFO L225 Difference]: With dead ends: 75 [2024-09-20 18:50:26,872 INFO L226 Difference]: Without dead ends: 65 [2024-09-20 18:50:26,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:50:26,872 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 29 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:26,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 128 Invalid, 246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:26,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-20 18:50:26,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 51. [2024-09-20 18:50:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 46 states have (on average 1.2391304347826086) internal successors, (57), 46 states have internal predecessors, (57), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2024-09-20 18:50:26,883 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 21 [2024-09-20 18:50:26,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:26,884 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2024-09-20 18:50:26,884 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:26,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:26,884 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2024-09-20 18:50:26,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 18:50:26,885 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:26,885 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:26,897 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:27,088 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 18:50:27,089 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:27,089 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:27,089 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 9 times [2024-09-20 18:50:27,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:27,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638219663] [2024-09-20 18:50:27,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:27,090 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:27,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:27,187 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:27,189 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:27,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638219663] [2024-09-20 18:50:27,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638219663] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:27,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021264266] [2024-09-20 18:50:27,190 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:27,190 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:27,190 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:27,191 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:27,193 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 18:50:27,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:50:27,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:27,223 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:50:27,223 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:27,260 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,260 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:27,333 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021264266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:27,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:27,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 10 [2024-09-20 18:50:27,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952819226] [2024-09-20 18:50:27,334 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:27,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-20 18:50:27,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:27,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-20 18:50:27,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2024-09-20 18:50:27,334 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:27,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:27,397 INFO L93 Difference]: Finished difference Result 87 states and 105 transitions. [2024-09-20 18:50:27,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 18:50:27,398 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 18:50:27,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:27,398 INFO L225 Difference]: With dead ends: 87 [2024-09-20 18:50:27,399 INFO L226 Difference]: Without dead ends: 78 [2024-09-20 18:50:27,399 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 10 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:50:27,399 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 2 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:27,399 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 86 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 18:50:27,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-20 18:50:27,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 54. [2024-09-20 18:50:27,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.2653061224489797) internal successors, (62), 49 states have internal predecessors, (62), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:27,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 66 transitions. [2024-09-20 18:50:27,410 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 66 transitions. Word has length 22 [2024-09-20 18:50:27,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:27,411 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 66 transitions. [2024-09-20 18:50:27,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 8 states have internal predecessors, (18), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:27,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:27,411 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 66 transitions. [2024-09-20 18:50:27,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-20 18:50:27,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:27,412 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:27,424 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-20 18:50:27,613 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 18:50:27,613 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:27,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:27,614 INFO L85 PathProgramCache]: Analyzing trace with hash 571398099, now seen corresponding path program 10 times [2024-09-20 18:50:27,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:27,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070715239] [2024-09-20 18:50:27,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:27,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:27,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:27,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:27,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:27,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:27,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070715239] [2024-09-20 18:50:27,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070715239] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:27,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [518365621] [2024-09-20 18:50:27,693 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:50:27,693 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:27,693 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:27,694 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:27,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 18:50:27,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:50:27,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:27,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-20 18:50:27,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,759 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:27,885 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:27,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [518365621] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:27,885 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:27,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 20 [2024-09-20 18:50:27,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024429784] [2024-09-20 18:50:27,885 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:27,886 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:50:27,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:27,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:50:27,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:50:27,887 INFO L87 Difference]: Start difference. First operand 54 states and 66 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:28,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:28,579 INFO L93 Difference]: Finished difference Result 96 states and 121 transitions. [2024-09-20 18:50:28,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-20 18:50:28,579 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-20 18:50:28,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:28,580 INFO L225 Difference]: With dead ends: 96 [2024-09-20 18:50:28,580 INFO L226 Difference]: Without dead ends: 74 [2024-09-20 18:50:28,581 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=356, Invalid=1900, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 18:50:28,581 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 91 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 135 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:28,581 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 135 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:28,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-20 18:50:28,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 62. [2024-09-20 18:50:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.263157894736842) internal successors, (72), 57 states have internal predecessors, (72), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2024-09-20 18:50:28,596 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 23 [2024-09-20 18:50:28,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:28,596 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2024-09-20 18:50:28,596 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:28,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:28,596 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2024-09-20 18:50:28,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:50:28,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:28,597 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:28,609 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:28,801 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 18:50:28,802 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:28,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:28,802 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 11 times [2024-09-20 18:50:28,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:28,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695490541] [2024-09-20 18:50:28,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:28,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:28,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:28,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:28,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:28,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:28,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695490541] [2024-09-20 18:50:28,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695490541] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:28,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087281953] [2024-09-20 18:50:28,941 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:28,941 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:28,941 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:28,942 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:28,943 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 18:50:28,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-20 18:50:28,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:28,984 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:50:28,985 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:29,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:29,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:29,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087281953] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:29,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:29,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 11 [2024-09-20 18:50:29,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869923044] [2024-09-20 18:50:29,115 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:29,116 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 18:50:29,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:29,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 18:50:29,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2024-09-20 18:50:29,116 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:29,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:29,192 INFO L93 Difference]: Finished difference Result 87 states and 104 transitions. [2024-09-20 18:50:29,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-20 18:50:29,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 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 25 [2024-09-20 18:50:29,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:29,194 INFO L225 Difference]: With dead ends: 87 [2024-09-20 18:50:29,194 INFO L226 Difference]: Without dead ends: 77 [2024-09-20 18:50:29,194 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 43 SyntacticMatches, 12 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:50:29,194 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:29,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 105 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:29,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2024-09-20 18:50:29,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 68. [2024-09-20 18:50:29,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 63 states have (on average 1.2698412698412698) internal successors, (80), 63 states have internal predecessors, (80), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:29,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2024-09-20 18:50:29,212 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 25 [2024-09-20 18:50:29,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:29,212 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2024-09-20 18:50:29,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.8181818181818181) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:29,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:29,213 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2024-09-20 18:50:29,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 18:50:29,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:29,213 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:29,226 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:29,417 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 18:50:29,419 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:29,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:29,420 INFO L85 PathProgramCache]: Analyzing trace with hash -874703007, now seen corresponding path program 12 times [2024-09-20 18:50:29,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:29,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140304234] [2024-09-20 18:50:29,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:29,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:29,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:29,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:29,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:29,519 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:29,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140304234] [2024-09-20 18:50:29,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140304234] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:29,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789968226] [2024-09-20 18:50:29,519 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:29,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:29,520 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:29,521 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:29,525 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 18:50:29,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:50:29,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:29,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-20 18:50:29,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:29,603 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:29,603 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:29,706 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:50:29,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789968226] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:29,707 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:29,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 8] total 21 [2024-09-20 18:50:29,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197151443] [2024-09-20 18:50:29,707 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:29,708 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:50:29,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:29,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:50:29,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:50:29,708 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:30,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:30,094 INFO L93 Difference]: Finished difference Result 89 states and 109 transitions. [2024-09-20 18:50:30,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 18:50:30,094 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 25 [2024-09-20 18:50:30,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:30,095 INFO L225 Difference]: With dead ends: 89 [2024-09-20 18:50:30,095 INFO L226 Difference]: Without dead ends: 76 [2024-09-20 18:50:30,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=171, Invalid=885, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:50:30,096 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 23 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:30,096 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 126 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:30,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2024-09-20 18:50:30,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 70. [2024-09-20 18:50:30,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.2153846153846153) internal successors, (79), 65 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:30,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 83 transitions. [2024-09-20 18:50:30,121 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 83 transitions. Word has length 25 [2024-09-20 18:50:30,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:30,122 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 83 transitions. [2024-09-20 18:50:30,122 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:30,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:30,122 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 83 transitions. [2024-09-20 18:50:30,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 18:50:30,123 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:30,123 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:30,135 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-20 18:50:30,327 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-20 18:50:30,328 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:30,328 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:30,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1920087306, now seen corresponding path program 13 times [2024-09-20 18:50:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966194721] [2024-09-20 18:50:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:30,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:30,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:30,443 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:30,443 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:30,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966194721] [2024-09-20 18:50:30,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966194721] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:30,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315810157] [2024-09-20 18:50:30,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:30,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:30,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:30,447 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:30,452 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 18:50:30,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:30,487 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-20 18:50:30,487 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:30,524 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:30,525 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:30,703 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:30,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1315810157] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:30,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:30,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13, 13] total 24 [2024-09-20 18:50:30,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447224671] [2024-09-20 18:50:30,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:30,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 18:50:30,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:30,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 18:50:30,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-20 18:50:30,704 INFO L87 Difference]: Start difference. First operand 70 states and 83 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:32,138 INFO L93 Difference]: Finished difference Result 134 states and 164 transitions. [2024-09-20 18:50:32,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-20 18:50:32,138 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 18:50:32,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:32,142 INFO L225 Difference]: With dead ends: 134 [2024-09-20 18:50:32,142 INFO L226 Difference]: Without dead ends: 108 [2024-09-20 18:50:32,144 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=678, Invalid=3744, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 18:50:32,144 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 161 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:32,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [161 Valid, 166 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:32,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-20 18:50:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 77. [2024-09-20 18:50:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 72 states have (on average 1.2222222222222223) internal successors, (88), 72 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 92 transitions. [2024-09-20 18:50:32,166 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 92 transitions. Word has length 26 [2024-09-20 18:50:32,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:32,166 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 92 transitions. [2024-09-20 18:50:32,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 92 transitions. [2024-09-20 18:50:32,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:50:32,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:32,167 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:32,179 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 18:50:32,367 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:32,368 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:32,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:32,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 14 times [2024-09-20 18:50:32,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:32,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189063210] [2024-09-20 18:50:32,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:32,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:32,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:32,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:32,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:32,514 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:50:32,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:32,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189063210] [2024-09-20 18:50:32,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189063210] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:32,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331705095] [2024-09-20 18:50:32,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:32,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:32,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:32,519 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:32,523 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 18:50:32,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:32,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:32,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-20 18:50:32,561 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:32,608 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:50:32,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:32,699 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 18:50:32,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331705095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:32,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:32,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 12 [2024-09-20 18:50:32,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023002647] [2024-09-20 18:50:32,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:32,700 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 18:50:32,700 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:32,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 18:50:32,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-09-20 18:50:32,701 INFO L87 Difference]: Start difference. First operand 77 states and 92 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:32,809 INFO L93 Difference]: Finished difference Result 101 states and 120 transitions. [2024-09-20 18:50:32,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 18:50:32,812 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 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 28 [2024-09-20 18:50:32,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:32,813 INFO L225 Difference]: With dead ends: 101 [2024-09-20 18:50:32,813 INFO L226 Difference]: Without dead ends: 90 [2024-09-20 18:50:32,813 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 48 SyntacticMatches, 14 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:50:32,814 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:32,814 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 150 Invalid, 154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:32,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2024-09-20 18:50:32,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 83. [2024-09-20 18:50:32,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.2307692307692308) internal successors, (96), 78 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 100 transitions. [2024-09-20 18:50:32,834 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 100 transitions. Word has length 28 [2024-09-20 18:50:32,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:32,835 INFO L474 AbstractCegarLoop]: Abstraction has 83 states and 100 transitions. [2024-09-20 18:50:32,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 10 states have internal predecessors, (22), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:32,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:32,835 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 100 transitions. [2024-09-20 18:50:32,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 18:50:32,836 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:32,836 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:32,848 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-20 18:50:33,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:33,040 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:33,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:33,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1371434858, now seen corresponding path program 15 times [2024-09-20 18:50:33,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:33,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302167146] [2024-09-20 18:50:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:33,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:33,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:33,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:33,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:33,199 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:33,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:33,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302167146] [2024-09-20 18:50:33,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302167146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:33,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911504643] [2024-09-20 18:50:33,200 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:33,200 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:33,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:33,201 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:33,202 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 18:50:33,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 18:50:33,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:33,235 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 18:50:33,236 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:33,361 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:33,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:33,514 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:33,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [911504643] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:33,514 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:33,514 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10, 10] total 27 [2024-09-20 18:50:33,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407682191] [2024-09-20 18:50:33,514 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:33,515 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 18:50:33,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:33,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 18:50:33,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2024-09-20 18:50:33,516 INFO L87 Difference]: Start difference. First operand 83 states and 100 transitions. Second operand has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:34,391 INFO L93 Difference]: Finished difference Result 127 states and 159 transitions. [2024-09-20 18:50:34,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 18:50:34,391 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 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 28 [2024-09-20 18:50:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:34,392 INFO L225 Difference]: With dead ends: 127 [2024-09-20 18:50:34,392 INFO L226 Difference]: Without dead ends: 106 [2024-09-20 18:50:34,394 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 44 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=2933, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 18:50:34,394 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 47 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 922 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:34,394 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 264 Invalid, 922 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:50:34,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-09-20 18:50:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 96. [2024-09-20 18:50:34,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 91 states have (on average 1.1978021978021978) internal successors, (109), 91 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:34,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 113 transitions. [2024-09-20 18:50:34,418 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 113 transitions. Word has length 28 [2024-09-20 18:50:34,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:34,418 INFO L474 AbstractCegarLoop]: Abstraction has 96 states and 113 transitions. [2024-09-20 18:50:34,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.4074074074074074) internal successors, (38), 27 states have internal predecessors, (38), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:34,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:34,418 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 113 transitions. [2024-09-20 18:50:34,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-20 18:50:34,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:34,419 INFO L216 NwaCegarLoop]: trace histogram [9, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:34,431 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 18:50:34,622 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:34,624 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:34,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:34,624 INFO L85 PathProgramCache]: Analyzing trace with hash -160836781, now seen corresponding path program 16 times [2024-09-20 18:50:34,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:34,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254608949] [2024-09-20 18:50:34,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:34,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:34,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:34,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:34,889 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 18:50:34,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:34,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254608949] [2024-09-20 18:50:34,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254608949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:34,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584690088] [2024-09-20 18:50:34,890 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:50:34,890 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:34,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:34,892 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:34,896 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 18:50:34,935 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:50:34,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:34,936 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:50:34,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:35,019 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:50:35,020 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:35,186 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:50:35,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584690088] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:35,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:35,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 10] total 29 [2024-09-20 18:50:35,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848162830] [2024-09-20 18:50:35,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:35,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 18:50:35,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:35,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 18:50:35,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=633, Unknown=0, NotChecked=0, Total=812 [2024-09-20 18:50:35,189 INFO L87 Difference]: Start difference. First operand 96 states and 113 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:35,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:35,630 INFO L93 Difference]: Finished difference Result 172 states and 213 transitions. [2024-09-20 18:50:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 18:50:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-20 18:50:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:35,636 INFO L225 Difference]: With dead ends: 172 [2024-09-20 18:50:35,636 INFO L226 Difference]: Without dead ends: 161 [2024-09-20 18:50:35,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=510, Invalid=1560, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 18:50:35,637 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 130 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:35,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 240 Invalid, 594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-20 18:50:35,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 97. [2024-09-20 18:50:35,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.184782608695652) internal successors, (109), 92 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:35,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 113 transitions. [2024-09-20 18:50:35,662 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 113 transitions. Word has length 29 [2024-09-20 18:50:35,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:35,662 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 113 transitions. [2024-09-20 18:50:35,662 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 29 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:35,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:35,663 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 113 transitions. [2024-09-20 18:50:35,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 18:50:35,663 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:35,664 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:35,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:35,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 18:50:35,864 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:35,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:35,865 INFO L85 PathProgramCache]: Analyzing trace with hash -511416493, now seen corresponding path program 17 times [2024-09-20 18:50:35,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:35,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657319570] [2024-09-20 18:50:35,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:35,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:35,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:36,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:36,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 18:50:36,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657319570] [2024-09-20 18:50:36,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657319570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:36,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1159417430] [2024-09-20 18:50:36,162 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:36,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:36,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:36,164 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:36,165 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 18:50:36,219 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-20 18:50:36,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:36,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:50:36,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:36,304 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 18:50:36,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-20 18:50:36,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1159417430] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:36,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:36,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 32 [2024-09-20 18:50:36,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291828203] [2024-09-20 18:50:36,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:36,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 18:50:36,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:36,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 18:50:36,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-20 18:50:36,546 INFO L87 Difference]: Start difference. First operand 97 states and 113 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:37,146 INFO L93 Difference]: Finished difference Result 171 states and 198 transitions. [2024-09-20 18:50:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-20 18:50:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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 31 [2024-09-20 18:50:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:37,147 INFO L225 Difference]: With dead ends: 171 [2024-09-20 18:50:37,147 INFO L226 Difference]: Without dead ends: 150 [2024-09-20 18:50:37,147 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=446, Invalid=1716, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:50:37,148 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 87 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:37,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [87 Valid, 195 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 304 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-20 18:50:37,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 94. [2024-09-20 18:50:37,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.1797752808988764) internal successors, (105), 89 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 109 transitions. [2024-09-20 18:50:37,175 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 109 transitions. Word has length 31 [2024-09-20 18:50:37,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:37,176 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 109 transitions. [2024-09-20 18:50:37,176 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:37,176 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 109 transitions. [2024-09-20 18:50:37,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 18:50:37,176 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:37,176 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:37,188 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:37,380 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-20 18:50:37,381 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:37,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:37,381 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 18 times [2024-09-20 18:50:37,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:37,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227314828] [2024-09-20 18:50:37,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:37,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:37,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:37,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:37,574 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:37,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:37,574 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227314828] [2024-09-20 18:50:37,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227314828] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:37,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491758513] [2024-09-20 18:50:37,575 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:37,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:37,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:37,576 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:37,578 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 18:50:37,630 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 18:50:37,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:37,631 INFO L262 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 18:50:37,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:37,687 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:37,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:37,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491758513] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:37,782 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:37,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 13 [2024-09-20 18:50:37,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868257616] [2024-09-20 18:50:37,782 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:37,783 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-20 18:50:37,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:37,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-20 18:50:37,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=131, Unknown=0, NotChecked=0, Total=156 [2024-09-20 18:50:37,783 INFO L87 Difference]: Start difference. First operand 94 states and 109 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:37,919 INFO L93 Difference]: Finished difference Result 149 states and 172 transitions. [2024-09-20 18:50:37,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 18:50:37,919 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 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 31 [2024-09-20 18:50:37,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:37,920 INFO L225 Difference]: With dead ends: 149 [2024-09-20 18:50:37,921 INFO L226 Difference]: Without dead ends: 137 [2024-09-20 18:50:37,921 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 53 SyntacticMatches, 16 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:50:37,921 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 5 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 191 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 191 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:37,922 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 165 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 191 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:37,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-20 18:50:37,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 105. [2024-09-20 18:50:37,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.21) internal successors, (121), 100 states have internal predecessors, (121), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-20 18:50:37,962 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 31 [2024-09-20 18:50:37,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:37,962 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-20 18:50:37,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 11 states have internal predecessors, (24), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:37,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:37,962 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-20 18:50:37,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:50:37,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:37,964 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:37,976 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-20 18:50:38,164 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 18:50:38,164 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:38,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:38,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1253123073, now seen corresponding path program 19 times [2024-09-20 18:50:38,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:38,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976393809] [2024-09-20 18:50:38,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:38,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:38,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:38,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:38,385 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 18:50:38,385 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976393809] [2024-09-20 18:50:38,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976393809] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:38,385 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357575706] [2024-09-20 18:50:38,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:38,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:38,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:38,387 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:38,394 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 18:50:38,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:38,435 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-20 18:50:38,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:38,499 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:38,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:38,857 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:38,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357575706] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:38,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:38,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 34 [2024-09-20 18:50:38,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1420466416] [2024-09-20 18:50:38,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:38,858 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-20 18:50:38,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:38,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-20 18:50:38,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=939, Unknown=0, NotChecked=0, Total=1122 [2024-09-20 18:50:38,861 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:43,616 INFO L93 Difference]: Finished difference Result 237 states and 293 transitions. [2024-09-20 18:50:43,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2024-09-20 18:50:43,619 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 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 33 [2024-09-20 18:50:43,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:43,624 INFO L225 Difference]: With dead ends: 237 [2024-09-20 18:50:43,624 INFO L226 Difference]: Without dead ends: 194 [2024-09-20 18:50:43,627 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4587 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=2042, Invalid=13708, Unknown=0, NotChecked=0, Total=15750 [2024-09-20 18:50:43,629 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 388 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 388 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:43,631 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [388 Valid, 232 Invalid, 825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:50:43,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-20 18:50:43,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 131. [2024-09-20 18:50:43,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.2380952380952381) internal successors, (156), 126 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 160 transitions. [2024-09-20 18:50:43,707 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 160 transitions. Word has length 33 [2024-09-20 18:50:43,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:43,708 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 160 transitions. [2024-09-20 18:50:43,708 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3235294117647058) internal successors, (45), 34 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:43,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,708 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 160 transitions. [2024-09-20 18:50:43,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:50:43,708 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:43,709 INFO L216 NwaCegarLoop]: trace histogram [10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:43,720 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:43,912 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 18:50:43,913 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:43,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:43,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1779115071, now seen corresponding path program 20 times [2024-09-20 18:50:43,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:43,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201722874] [2024-09-20 18:50:43,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:43,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:43,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:44,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:44,093 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:44,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201722874] [2024-09-20 18:50:44,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201722874] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:44,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2117972528] [2024-09-20 18:50:44,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:50:44,094 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:44,094 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:44,095 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:44,096 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 18:50:44,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:50:44,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:44,137 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-20 18:50:44,138 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:44,230 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:50:44,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:44,471 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-20 18:50:44,472 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2117972528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:44,472 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:44,472 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-20 18:50:44,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027458248] [2024-09-20 18:50:44,472 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:44,472 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 18:50:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:44,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 18:50:44,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 18:50:44,473 INFO L87 Difference]: Start difference. First operand 131 states and 160 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:45,625 INFO L93 Difference]: Finished difference Result 156 states and 191 transitions. [2024-09-20 18:50:45,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2024-09-20 18:50:45,626 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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 33 [2024-09-20 18:50:45,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:45,627 INFO L225 Difference]: With dead ends: 156 [2024-09-20 18:50:45,627 INFO L226 Difference]: Without dead ends: 139 [2024-09-20 18:50:45,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=469, Invalid=3313, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:50:45,629 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 284 mSDsCounter, 0 mSdLazyCounter, 956 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 982 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 956 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:45,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 301 Invalid, 982 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 956 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:50:45,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-20 18:50:45,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 129. [2024-09-20 18:50:45,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 124 states have (on average 1.2016129032258065) internal successors, (149), 124 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 153 transitions. [2024-09-20 18:50:45,708 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 153 transitions. Word has length 33 [2024-09-20 18:50:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:45,711 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 153 transitions. [2024-09-20 18:50:45,711 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:45,711 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 153 transitions. [2024-09-20 18:50:45,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 18:50:45,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:45,712 INFO L216 NwaCegarLoop]: trace histogram [11, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:45,724 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-20 18:50:45,912 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 18:50:45,912 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:45,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:45,913 INFO L85 PathProgramCache]: Analyzing trace with hash -1898873598, now seen corresponding path program 21 times [2024-09-20 18:50:45,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:45,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865398786] [2024-09-20 18:50:45,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:45,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:45,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:46,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:46,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 18:50:46,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865398786] [2024-09-20 18:50:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865398786] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:46,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419866199] [2024-09-20 18:50:46,159 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:50:46,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:46,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:46,160 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:46,162 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 18:50:46,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-20 18:50:46,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:46,203 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 18:50:46,204 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:50:46,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:46,655 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:50:46,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419866199] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:46,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:46,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 12, 12] total 35 [2024-09-20 18:50:46,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537471893] [2024-09-20 18:50:46,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:46,656 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-20 18:50:46,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:46,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-20 18:50:46,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2024-09-20 18:50:46,657 INFO L87 Difference]: Start difference. First operand 129 states and 153 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:48,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:48,261 INFO L93 Difference]: Finished difference Result 174 states and 210 transitions. [2024-09-20 18:50:48,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2024-09-20 18:50:48,262 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 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 33 [2024-09-20 18:50:48,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:48,263 INFO L225 Difference]: With dead ends: 174 [2024-09-20 18:50:48,263 INFO L226 Difference]: Without dead ends: 162 [2024-09-20 18:50:48,264 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 50 SyntacticMatches, 5 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1519 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1288, Invalid=6194, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 18:50:48,264 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 202 mSDsluCounter, 296 mSDsCounter, 0 mSdLazyCounter, 1227 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 1281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:48,265 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [202 Valid, 314 Invalid, 1281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1227 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:50:48,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2024-09-20 18:50:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 128. [2024-09-20 18:50:48,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 123 states have (on average 1.1869918699186992) internal successors, (146), 123 states have internal predecessors, (146), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 150 transitions. [2024-09-20 18:50:48,312 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 150 transitions. Word has length 33 [2024-09-20 18:50:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:48,313 INFO L474 AbstractCegarLoop]: Abstraction has 128 states and 150 transitions. [2024-09-20 18:50:48,313 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:48,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 150 transitions. [2024-09-20 18:50:48,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 18:50:48,313 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:48,314 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:48,325 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:48,517 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 18:50:48,518 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:48,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:48,518 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 22 times [2024-09-20 18:50:48,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:48,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131589010] [2024-09-20 18:50:48,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:48,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:48,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:48,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:48,719 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:50:48,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:48,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131589010] [2024-09-20 18:50:48,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131589010] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:48,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205943897] [2024-09-20 18:50:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:50:48,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:48,722 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:48,729 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 18:50:48,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:50:48,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:48,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-20 18:50:48,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:48,863 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:50:48,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:49,061 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-20 18:50:49,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205943897] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:49,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:49,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 14 [2024-09-20 18:50:49,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110319238] [2024-09-20 18:50:49,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:49,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 18:50:49,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:49,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 18:50:49,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2024-09-20 18:50:49,063 INFO L87 Difference]: Start difference. First operand 128 states and 150 transitions. Second operand has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:49,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:49,239 INFO L93 Difference]: Finished difference Result 157 states and 181 transitions. [2024-09-20 18:50:49,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-20 18:50:49,240 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 18:50:49,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:49,244 INFO L225 Difference]: With dead ends: 157 [2024-09-20 18:50:49,244 INFO L226 Difference]: Without dead ends: 144 [2024-09-20 18:50:49,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 SyntacticMatches, 16 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:49,244 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 5 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:49,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 145 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:49,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2024-09-20 18:50:49,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2024-09-20 18:50:49,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.183206106870229) internal successors, (155), 131 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:49,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 159 transitions. [2024-09-20 18:50:49,323 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 159 transitions. Word has length 34 [2024-09-20 18:50:49,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:49,324 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 159 transitions. [2024-09-20 18:50:49,324 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 12 states have internal predecessors, (26), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:49,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:49,324 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 159 transitions. [2024-09-20 18:50:49,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 18:50:49,325 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:49,325 INFO L216 NwaCegarLoop]: trace histogram [9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:49,340 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-20 18:50:49,528 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-20 18:50:49,529 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:49,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:49,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1701774746, now seen corresponding path program 23 times [2024-09-20 18:50:49,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:49,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941622924] [2024-09-20 18:50:49,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:49,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:49,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:49,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:49,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:50:49,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941622924] [2024-09-20 18:50:49,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941622924] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:49,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990995047] [2024-09-20 18:50:49,711 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:50:49,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:49,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:49,712 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:49,714 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 18:50:49,822 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 18:50:49,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:49,824 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 18:50:49,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:49,967 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:50:49,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:50,367 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 16 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 18:50:50,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [990995047] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:50,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:50,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 42 [2024-09-20 18:50:50,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049702758] [2024-09-20 18:50:50,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:50,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 18:50:50,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:50,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 18:50:50,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=1433, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 18:50:50,370 INFO L87 Difference]: Start difference. First operand 136 states and 159 transitions. Second operand has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:51,744 INFO L93 Difference]: Finished difference Result 263 states and 301 transitions. [2024-09-20 18:50:51,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-20 18:50:51,744 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2024-09-20 18:50:51,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:51,745 INFO L225 Difference]: With dead ends: 263 [2024-09-20 18:50:51,745 INFO L226 Difference]: Without dead ends: 239 [2024-09-20 18:50:51,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1109 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=975, Invalid=3855, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 18:50:51,749 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 167 mSDsluCounter, 218 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 231 SdHoareTripleChecker+Invalid, 473 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:51,749 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [167 Valid, 231 Invalid, 473 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:50:51,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-20 18:50:51,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 131. [2024-09-20 18:50:51,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 126 states have (on average 1.1825396825396826) internal successors, (149), 126 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-20 18:50:51,808 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 36 [2024-09-20 18:50:51,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:51,808 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-20 18:50:51,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.3571428571428572) internal successors, (57), 42 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:51,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:51,809 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-20 18:50:51,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 18:50:51,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:51,809 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:51,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:52,013 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 18:50:52,014 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:52,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:52,014 INFO L85 PathProgramCache]: Analyzing trace with hash 1044738881, now seen corresponding path program 24 times [2024-09-20 18:50:52,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:52,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977547323] [2024-09-20 18:50:52,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:52,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:52,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:52,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:52,227 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:52,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:52,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977547323] [2024-09-20 18:50:52,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977547323] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:52,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306733383] [2024-09-20 18:50:52,228 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:50:52,228 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:52,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:52,233 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:52,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 18:50:52,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-20 18:50:52,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:50:52,318 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:50:52,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:52,376 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:52,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:52,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306733383] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:52,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:52,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 15 [2024-09-20 18:50:52,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404643619] [2024-09-20 18:50:52,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:52,520 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 18:50:52,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:52,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 18:50:52,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2024-09-20 18:50:52,521 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:50:52,743 INFO L93 Difference]: Finished difference Result 206 states and 237 transitions. [2024-09-20 18:50:52,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-20 18:50:52,743 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 18:50:52,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:50:52,744 INFO L225 Difference]: With dead ends: 206 [2024-09-20 18:50:52,744 INFO L226 Difference]: Without dead ends: 192 [2024-09-20 18:50:52,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 63 SyntacticMatches, 20 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:50:52,745 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 277 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 277 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:50:52,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 207 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 277 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:50:52,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-09-20 18:50:52,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 148. [2024-09-20 18:50:52,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2097902097902098) internal successors, (173), 143 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 177 transitions. [2024-09-20 18:50:52,810 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 177 transitions. Word has length 37 [2024-09-20 18:50:52,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:50:52,810 INFO L474 AbstractCegarLoop]: Abstraction has 148 states and 177 transitions. [2024-09-20 18:50:52,810 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 13 states have internal predecessors, (28), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:50:52,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:52,811 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 177 transitions. [2024-09-20 18:50:52,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-20 18:50:52,811 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:50:52,811 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:50:52,826 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 18:50:53,015 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:53,016 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:50:53,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:50:53,016 INFO L85 PathProgramCache]: Analyzing trace with hash -939864138, now seen corresponding path program 25 times [2024-09-20 18:50:53,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:50:53,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137982670] [2024-09-20 18:50:53,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:50:53,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:50:53,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:53,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:50:53,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:53,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:50:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137982670] [2024-09-20 18:50:53,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137982670] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:50:53,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [774095889] [2024-09-20 18:50:53,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:50:53,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:50:53,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:50:53,226 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:50:53,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 18:50:53,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:50:53,282 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-20 18:50:53,283 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:50:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:53,340 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:50:53,749 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:50:53,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [774095889] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:50:53,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:50:53,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 21, 21] total 40 [2024-09-20 18:50:53,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187673243] [2024-09-20 18:50:53,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:50:53,749 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-20 18:50:53,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:50:53,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-20 18:50:53,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1319, Unknown=0, NotChecked=0, Total=1560 [2024-09-20 18:50:53,750 INFO L87 Difference]: Start difference. First operand 148 states and 177 transitions. Second operand has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:05,572 INFO L93 Difference]: Finished difference Result 312 states and 375 transitions. [2024-09-20 18:51:05,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2024-09-20 18:51:05,573 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-20 18:51:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:05,574 INFO L225 Difference]: With dead ends: 312 [2024-09-20 18:51:05,574 INFO L226 Difference]: Without dead ends: 260 [2024-09-20 18:51:05,576 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9895 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=4521, Invalid=25235, Unknown=0, NotChecked=0, Total=29756 [2024-09-20 18:51:05,576 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 692 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:05,576 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 224 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:51:05,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2024-09-20 18:51:05,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 159. [2024-09-20 18:51:05,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.2077922077922079) internal successors, (186), 154 states have internal predecessors, (186), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:05,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 190 transitions. [2024-09-20 18:51:05,652 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 190 transitions. Word has length 38 [2024-09-20 18:51:05,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:05,653 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 190 transitions. [2024-09-20 18:51:05,653 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.25) internal successors, (50), 40 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:05,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:05,653 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 190 transitions. [2024-09-20 18:51:05,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 18:51:05,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:05,653 INFO L216 NwaCegarLoop]: trace histogram [15, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:05,666 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2024-09-20 18:51:05,854 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:05,854 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:05,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:05,854 INFO L85 PathProgramCache]: Analyzing trace with hash -981807486, now seen corresponding path program 26 times [2024-09-20 18:51:05,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:05,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030516703] [2024-09-20 18:51:05,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:05,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:05,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:06,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:06,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:06,169 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:51:06,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030516703] [2024-09-20 18:51:06,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030516703] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:06,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213467675] [2024-09-20 18:51:06,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:51:06,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:06,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:06,171 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:06,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 18:51:06,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:51:06,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:06,224 INFO L262 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 56 conjuncts are in the unsatisfiable core [2024-09-20 18:51:06,225 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:06,419 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:51:06,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:06,746 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 18:51:06,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213467675] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:06,747 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:06,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 14] total 42 [2024-09-20 18:51:06,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028015969] [2024-09-20 18:51:06,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:06,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-20 18:51:06,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:06,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-20 18:51:06,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=1529, Unknown=0, NotChecked=0, Total=1722 [2024-09-20 18:51:06,748 INFO L87 Difference]: Start difference. First operand 159 states and 190 transitions. Second operand has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:09,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:09,286 INFO L93 Difference]: Finished difference Result 249 states and 296 transitions. [2024-09-20 18:51:09,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2024-09-20 18:51:09,286 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 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 39 [2024-09-20 18:51:09,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:09,287 INFO L225 Difference]: With dead ends: 249 [2024-09-20 18:51:09,287 INFO L226 Difference]: Without dead ends: 222 [2024-09-20 18:51:09,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=867, Invalid=8835, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 18:51:09,288 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 84 mSDsluCounter, 462 mSDsCounter, 0 mSdLazyCounter, 1798 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 1798 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:09,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 484 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 1798 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:51:09,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-20 18:51:09,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 186. [2024-09-20 18:51:09,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.160220994475138) internal successors, (210), 181 states have internal predecessors, (210), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:09,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 214 transitions. [2024-09-20 18:51:09,389 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 214 transitions. Word has length 39 [2024-09-20 18:51:09,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:09,390 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 214 transitions. [2024-09-20 18:51:09,390 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:09,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:09,390 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 214 transitions. [2024-09-20 18:51:09,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 18:51:09,391 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:09,391 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:09,403 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-20 18:51:09,591 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:09,592 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:09,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:09,592 INFO L85 PathProgramCache]: Analyzing trace with hash -316344474, now seen corresponding path program 27 times [2024-09-20 18:51:09,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:09,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496644658] [2024-09-20 18:51:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:09,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:09,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:09,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:09,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496644658] [2024-09-20 18:51:09,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496644658] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:09,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709929521] [2024-09-20 18:51:09,824 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:51:09,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:09,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:09,827 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:09,829 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-20 18:51:09,946 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:51:09,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:09,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 18:51:09,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:10,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:10,182 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:10,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709929521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:10,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:10,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 16 [2024-09-20 18:51:10,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737996097] [2024-09-20 18:51:10,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:10,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-20 18:51:10,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:10,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-20 18:51:10,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2024-09-20 18:51:10,184 INFO L87 Difference]: Start difference. First operand 186 states and 214 transitions. Second operand has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:10,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:10,465 INFO L93 Difference]: Finished difference Result 225 states and 258 transitions. [2024-09-20 18:51:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-20 18:51:10,466 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2024-09-20 18:51:10,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:10,467 INFO L225 Difference]: With dead ends: 225 [2024-09-20 18:51:10,467 INFO L226 Difference]: Without dead ends: 210 [2024-09-20 18:51:10,467 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 68 SyntacticMatches, 22 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:51:10,467 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 7 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:10,468 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 268 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 18:51:10,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2024-09-20 18:51:10,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 195. [2024-09-20 18:51:10,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.1631578947368422) internal successors, (221), 190 states have internal predecessors, (221), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:10,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 225 transitions. [2024-09-20 18:51:10,584 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 225 transitions. Word has length 40 [2024-09-20 18:51:10,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:10,584 INFO L474 AbstractCegarLoop]: Abstraction has 195 states and 225 transitions. [2024-09-20 18:51:10,585 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.875) internal successors, (30), 14 states have internal predecessors, (30), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:10,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:10,585 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 225 transitions. [2024-09-20 18:51:10,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 18:51:10,585 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:10,585 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:10,599 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2024-09-20 18:51:10,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-20 18:51:10,789 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:10,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:10,790 INFO L85 PathProgramCache]: Analyzing trace with hash -325611725, now seen corresponding path program 28 times [2024-09-20 18:51:10,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:10,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269909416] [2024-09-20 18:51:10,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:10,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:10,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:11,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:11,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:11,110 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:11,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269909416] [2024-09-20 18:51:11,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269909416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:11,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328324340] [2024-09-20 18:51:11,110 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:51:11,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:11,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:11,115 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:11,118 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-20 18:51:11,162 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:51:11,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:11,163 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-20 18:51:11,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:11,218 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:11,746 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:51:11,746 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328324340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:11,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:11,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23, 23] total 44 [2024-09-20 18:51:11,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385432409] [2024-09-20 18:51:11,747 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:11,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-20 18:51:11,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:11,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-20 18:51:11,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=287, Invalid=1605, Unknown=0, NotChecked=0, Total=1892 [2024-09-20 18:51:11,748 INFO L87 Difference]: Start difference. First operand 195 states and 225 transitions. Second operand has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:31,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:31,143 INFO L93 Difference]: Finished difference Result 404 states and 469 transitions. [2024-09-20 18:51:31,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2024-09-20 18:51:31,144 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-20 18:51:31,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:31,145 INFO L225 Difference]: With dead ends: 404 [2024-09-20 18:51:31,145 INFO L226 Difference]: Without dead ends: 349 [2024-09-20 18:51:31,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14929 ImplicationChecksByTransitivity, 18.7s TimeCoverageRelationStatistics Valid=6503, Invalid=36139, Unknown=0, NotChecked=0, Total=42642 [2024-09-20 18:51:31,148 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 852 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 804 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 852 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 979 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 804 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:31,148 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [852 Valid, 286 Invalid, 979 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 804 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 18:51:31,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-20 18:51:31,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 209. [2024-09-20 18:51:31,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 204 states have (on average 1.1764705882352942) internal successors, (240), 204 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:31,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 244 transitions. [2024-09-20 18:51:31,271 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 244 transitions. Word has length 41 [2024-09-20 18:51:31,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:31,271 INFO L474 AbstractCegarLoop]: Abstraction has 209 states and 244 transitions. [2024-09-20 18:51:31,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.2272727272727273) internal successors, (54), 44 states have internal predecessors, (54), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:31,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:31,271 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 244 transitions. [2024-09-20 18:51:31,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:51:31,272 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:31,272 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:31,285 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:31,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-20 18:51:31,477 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:31,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:31,477 INFO L85 PathProgramCache]: Analyzing trace with hash 1065646369, now seen corresponding path program 29 times [2024-09-20 18:51:31,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:31,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538061761] [2024-09-20 18:51:31,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:31,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:31,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:31,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:31,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:31,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538061761] [2024-09-20 18:51:31,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538061761] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:31,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99147825] [2024-09-20 18:51:31,722 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:51:31,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:31,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:31,724 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:31,725 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-20 18:51:31,866 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-20 18:51:31,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:31,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 18:51:31,868 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:31,940 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:31,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:32,112 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:32,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99147825] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:32,113 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:32,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 17 [2024-09-20 18:51:32,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836128921] [2024-09-20 18:51:32,114 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:32,114 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-20 18:51:32,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:32,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-20 18:51:32,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=239, Unknown=0, NotChecked=0, Total=272 [2024-09-20 18:51:32,115 INFO L87 Difference]: Start difference. First operand 209 states and 244 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:32,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:32,441 INFO L93 Difference]: Finished difference Result 251 states and 292 transitions. [2024-09-20 18:51:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-20 18:51:32,441 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-20 18:51:32,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:32,443 INFO L225 Difference]: With dead ends: 251 [2024-09-20 18:51:32,443 INFO L226 Difference]: Without dead ends: 235 [2024-09-20 18:51:32,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 75 SyntacticMatches, 22 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=267, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:51:32,443 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 9 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:32,444 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 307 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:51:32,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-20 18:51:32,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 220. [2024-09-20 18:51:32,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.1813953488372093) internal successors, (254), 215 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:32,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 258 transitions. [2024-09-20 18:51:32,575 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 258 transitions. Word has length 43 [2024-09-20 18:51:32,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:32,576 INFO L474 AbstractCegarLoop]: Abstraction has 220 states and 258 transitions. [2024-09-20 18:51:32,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 15 states have internal predecessors, (32), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:32,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:32,576 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 258 transitions. [2024-09-20 18:51:32,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:51:32,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:32,577 INFO L216 NwaCegarLoop]: trace histogram [16, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:32,590 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:32,778 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-20 18:51:32,779 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:32,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:32,779 INFO L85 PathProgramCache]: Analyzing trace with hash -133663071, now seen corresponding path program 30 times [2024-09-20 18:51:32,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:32,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162123575] [2024-09-20 18:51:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:32,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:32,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:33,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:33,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:33,097 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:51:33,097 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:33,097 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162123575] [2024-09-20 18:51:33,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162123575] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:33,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439196185] [2024-09-20 18:51:33,098 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:51:33,098 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:33,098 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:33,099 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) [2024-09-20 18:51:33,100 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-20 18:51:33,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-20 18:51:33,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:33,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-20 18:51:33,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:33,359 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:51:33,359 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:33,721 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 137 trivial. 0 not checked. [2024-09-20 18:51:33,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439196185] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:33,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:33,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 16] total 47 [2024-09-20 18:51:33,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2121881765] [2024-09-20 18:51:33,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:33,723 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-20 18:51:33,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:33,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-20 18:51:33,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=1926, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 18:51:33,724 INFO L87 Difference]: Start difference. First operand 220 states and 258 transitions. Second operand has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:37,276 INFO L93 Difference]: Finished difference Result 284 states and 339 transitions. [2024-09-20 18:51:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-20 18:51:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-20 18:51:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:37,277 INFO L225 Difference]: With dead ends: 284 [2024-09-20 18:51:37,277 INFO L226 Difference]: Without dead ends: 240 [2024-09-20 18:51:37,278 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3156 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=1183, Invalid=12389, Unknown=0, NotChecked=0, Total=13572 [2024-09-20 18:51:37,278 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 97 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 556 SdHoareTripleChecker+Invalid, 2338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:37,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 556 Invalid, 2338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-20 18:51:37,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-20 18:51:37,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 224. [2024-09-20 18:51:37,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.1598173515981736) internal successors, (254), 219 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:37,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 258 transitions. [2024-09-20 18:51:37,416 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 258 transitions. Word has length 43 [2024-09-20 18:51:37,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:37,416 INFO L474 AbstractCegarLoop]: Abstraction has 224 states and 258 transitions. [2024-09-20 18:51:37,416 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2340425531914894) internal successors, (58), 47 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:37,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:37,417 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 258 transitions. [2024-09-20 18:51:37,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-20 18:51:37,424 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:37,424 INFO L216 NwaCegarLoop]: trace histogram [17, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:37,437 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:37,625 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-20 18:51:37,625 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:37,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:37,626 INFO L85 PathProgramCache]: Analyzing trace with hash -1260222622, now seen corresponding path program 31 times [2024-09-20 18:51:37,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:37,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15992265] [2024-09-20 18:51:37,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:37,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:37,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:37,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:37,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:37,976 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 181 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 18:51:37,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15992265] [2024-09-20 18:51:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15992265] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:37,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620602321] [2024-09-20 18:51:37,977 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:51:37,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:37,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:37,978 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:37,979 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-20 18:51:38,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:38,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-20 18:51:38,025 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:38,169 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 202 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:51:38,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:38,527 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-20 18:51:38,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620602321] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:38,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:38,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 16] total 49 [2024-09-20 18:51:38,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1640416417] [2024-09-20 18:51:38,527 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:38,528 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-20 18:51:38,528 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:38,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-20 18:51:38,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=466, Invalid=1886, Unknown=0, NotChecked=0, Total=2352 [2024-09-20 18:51:38,532 INFO L87 Difference]: Start difference. First operand 224 states and 258 transitions. Second operand has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:40,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:51:40,497 INFO L93 Difference]: Finished difference Result 409 states and 484 transitions. [2024-09-20 18:51:40,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2024-09-20 18:51:40,497 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2024-09-20 18:51:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:51:40,499 INFO L225 Difference]: With dead ends: 409 [2024-09-20 18:51:40,502 INFO L226 Difference]: Without dead ends: 395 [2024-09-20 18:51:40,503 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2559 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2360, Invalid=7342, Unknown=0, NotChecked=0, Total=9702 [2024-09-20 18:51:40,503 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 309 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1908 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1908 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-20 18:51:40,503 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 542 Invalid, 2001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1908 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-20 18:51:40,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2024-09-20 18:51:40,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 223. [2024-09-20 18:51:40,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.146788990825688) internal successors, (250), 218 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:40,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 254 transitions. [2024-09-20 18:51:40,672 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 254 transitions. Word has length 43 [2024-09-20 18:51:40,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:51:40,672 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 254 transitions. [2024-09-20 18:51:40,672 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:51:40,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:40,673 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 254 transitions. [2024-09-20 18:51:40,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-20 18:51:40,673 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:51:40,673 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:51:40,688 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-20 18:51:40,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-20 18:51:40,877 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:51:40,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:51:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash -535534058, now seen corresponding path program 32 times [2024-09-20 18:51:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:51:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275024442] [2024-09-20 18:51:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:51:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:51:40,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:41,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:51:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:51:41,158 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:41,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:51:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275024442] [2024-09-20 18:51:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275024442] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:51:41,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307385771] [2024-09-20 18:51:41,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:51:41,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:51:41,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:51:41,160 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:51:41,161 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-20 18:51:41,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:51:41,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:51:41,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-20 18:51:41,217 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:51:41,278 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:41,278 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:51:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:51:41,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1307385771] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:51:41,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:51:41,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 25, 25] total 48 [2024-09-20 18:51:41,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032995986] [2024-09-20 18:51:41,906 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:51:41,906 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-20 18:51:41,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:51:41,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-20 18:51:41,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1919, Unknown=0, NotChecked=0, Total=2256 [2024-09-20 18:51:41,907 INFO L87 Difference]: Start difference. First operand 223 states and 254 transitions. Second operand has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:12,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:12,210 INFO L93 Difference]: Finished difference Result 463 states and 527 transitions. [2024-09-20 18:52:12,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 220 states. [2024-09-20 18:52:12,211 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2024-09-20 18:52:12,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:12,212 INFO L225 Difference]: With dead ends: 463 [2024-09-20 18:52:12,212 INFO L226 Difference]: Without dead ends: 399 [2024-09-20 18:52:12,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 242 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21643 ImplicationChecksByTransitivity, 29.4s TimeCoverageRelationStatistics Valid=9078, Invalid=50214, Unknown=0, NotChecked=0, Total=59292 [2024-09-20 18:52:12,215 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1046 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 827 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1046 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 827 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:12,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1046 Valid, 299 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 827 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 18:52:12,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 399 states. [2024-09-20 18:52:12,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 399 to 238. [2024-09-20 18:52:12,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.1587982832618027) internal successors, (270), 233 states have internal predecessors, (270), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:12,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 274 transitions. [2024-09-20 18:52:12,377 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 274 transitions. Word has length 44 [2024-09-20 18:52:12,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:12,377 INFO L474 AbstractCegarLoop]: Abstraction has 238 states and 274 transitions. [2024-09-20 18:52:12,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.2083333333333333) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:12,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:12,377 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 274 transitions. [2024-09-20 18:52:12,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:52:12,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:12,378 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:12,390 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2024-09-20 18:52:12,582 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-20 18:52:12,583 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:12,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:12,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1831492090, now seen corresponding path program 33 times [2024-09-20 18:52:12,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:12,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770350964] [2024-09-20 18:52:12,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:12,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:12,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:12,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:12,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:12,905 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:12,906 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770350964] [2024-09-20 18:52:12,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770350964] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:12,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1692607790] [2024-09-20 18:52:12,906 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:52:12,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:12,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:12,907 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:12,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-20 18:52:12,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 18:52:12,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:12,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-20 18:52:12,989 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:13,069 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:13,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:13,297 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:13,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1692607790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:13,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:13,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 18 [2024-09-20 18:52:13,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484576492] [2024-09-20 18:52:13,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:13,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 18:52:13,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:13,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 18:52:13,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2024-09-20 18:52:13,299 INFO L87 Difference]: Start difference. First operand 238 states and 274 transitions. Second operand has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:13,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:13,684 INFO L93 Difference]: Finished difference Result 280 states and 321 transitions. [2024-09-20 18:52:13,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-20 18:52:13,684 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-20 18:52:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:13,686 INFO L225 Difference]: With dead ends: 280 [2024-09-20 18:52:13,686 INFO L226 Difference]: Without dead ends: 263 [2024-09-20 18:52:13,686 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 78 SyntacticMatches, 26 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:52:13,686 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 8 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:13,687 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 299 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:13,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-20 18:52:13,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 249. [2024-09-20 18:52:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 244 states have (on average 1.1598360655737705) internal successors, (283), 244 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 287 transitions. [2024-09-20 18:52:13,855 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 287 transitions. Word has length 46 [2024-09-20 18:52:13,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:13,856 INFO L474 AbstractCegarLoop]: Abstraction has 249 states and 287 transitions. [2024-09-20 18:52:13,856 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.8888888888888888) internal successors, (34), 16 states have internal predecessors, (34), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:13,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:13,856 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 287 transitions. [2024-09-20 18:52:13,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-20 18:52:13,857 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:13,857 INFO L216 NwaCegarLoop]: trace histogram [18, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:13,869 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:14,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-20 18:52:14,057 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:14,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:14,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1201296938, now seen corresponding path program 34 times [2024-09-20 18:52:14,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:14,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886019926] [2024-09-20 18:52:14,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:14,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:14,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:14,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:14,578 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:52:14,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:14,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886019926] [2024-09-20 18:52:14,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886019926] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:14,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677713804] [2024-09-20 18:52:14,578 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:52:14,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:14,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:14,580 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:14,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-20 18:52:14,627 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:52:14,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:14,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-20 18:52:14,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:14,828 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 0 proven. 199 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:52:14,828 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:15,361 INFO L134 CoverageAnalysis]: Checked inductivity of 235 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-20 18:52:15,362 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1677713804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:15,362 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:15,362 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 18] total 53 [2024-09-20 18:52:15,362 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763966584] [2024-09-20 18:52:15,362 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:15,362 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-20 18:52:15,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:15,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-20 18:52:15,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=2471, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 18:52:15,363 INFO L87 Difference]: Start difference. First operand 249 states and 287 transitions. Second operand has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:21,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:21,061 INFO L93 Difference]: Finished difference Result 319 states and 376 transitions. [2024-09-20 18:52:21,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2024-09-20 18:52:21,061 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2024-09-20 18:52:21,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:21,063 INFO L225 Difference]: With dead ends: 319 [2024-09-20 18:52:21,063 INFO L226 Difference]: Without dead ends: 279 [2024-09-20 18:52:21,063 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5249 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1655, Invalid=19225, Unknown=0, NotChecked=0, Total=20880 [2024-09-20 18:52:21,064 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 123 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 2839 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 618 SdHoareTripleChecker+Invalid, 2905 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 2839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:21,064 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 618 Invalid, 2905 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 2839 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:52:21,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2024-09-20 18:52:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 261. [2024-09-20 18:52:21,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 256 states have (on average 1.13671875) internal successors, (291), 256 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 295 transitions. [2024-09-20 18:52:21,237 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 295 transitions. Word has length 46 [2024-09-20 18:52:21,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:21,237 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 295 transitions. [2024-09-20 18:52:21,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 53 states have internal predecessors, (64), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:21,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 295 transitions. [2024-09-20 18:52:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-20 18:52:21,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:21,238 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:21,252 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:21,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-20 18:52:21,443 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:21,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash 981523539, now seen corresponding path program 35 times [2024-09-20 18:52:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:21,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135725683] [2024-09-20 18:52:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:21,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:21,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:21,828 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:21,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135725683] [2024-09-20 18:52:21,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135725683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:21,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819563989] [2024-09-20 18:52:21,829 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:52:21,829 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:21,829 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:21,830 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:21,834 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-20 18:52:22,315 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-20 18:52:22,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:22,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 72 conjuncts are in the unsatisfiable core [2024-09-20 18:52:22,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:22,552 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:23,347 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-20 18:52:23,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819563989] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:23,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:23,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 62 [2024-09-20 18:52:23,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063894543] [2024-09-20 18:52:23,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:23,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-20 18:52:23,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:23,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-20 18:52:23,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=577, Invalid=3205, Unknown=0, NotChecked=0, Total=3782 [2024-09-20 18:52:23,348 INFO L87 Difference]: Start difference. First operand 261 states and 295 transitions. Second operand has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:29,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:29,038 INFO L93 Difference]: Finished difference Result 549 states and 622 transitions. [2024-09-20 18:52:29,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2024-09-20 18:52:29,038 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2024-09-20 18:52:29,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:29,040 INFO L225 Difference]: With dead ends: 549 [2024-09-20 18:52:29,040 INFO L226 Difference]: Without dead ends: 518 [2024-09-20 18:52:29,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4409 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=3228, Invalid=13028, Unknown=0, NotChecked=0, Total=16256 [2024-09-20 18:52:29,042 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 368 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 749 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 368 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 890 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:29,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [368 Valid, 353 Invalid, 890 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 749 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 18:52:29,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2024-09-20 18:52:29,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 296. [2024-09-20 18:52:29,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 291 states have (on average 1.1443298969072164) internal successors, (333), 291 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:29,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 337 transitions. [2024-09-20 18:52:29,279 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 337 transitions. Word has length 47 [2024-09-20 18:52:29,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:29,279 INFO L474 AbstractCegarLoop]: Abstraction has 296 states and 337 transitions. [2024-09-20 18:52:29,279 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.2096774193548387) internal successors, (75), 62 states have internal predecessors, (75), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:29,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:29,280 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 337 transitions. [2024-09-20 18:52:29,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-20 18:52:29,280 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:29,280 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:29,294 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-20 18:52:29,481 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:29,481 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:29,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:29,482 INFO L85 PathProgramCache]: Analyzing trace with hash -1882278143, now seen corresponding path program 36 times [2024-09-20 18:52:29,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:29,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929469205] [2024-09-20 18:52:29,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:29,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:29,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:29,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:29,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:29,785 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:29,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929469205] [2024-09-20 18:52:29,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929469205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:29,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994025896] [2024-09-20 18:52:29,785 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:52:29,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:29,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:29,787 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:29,788 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-20 18:52:29,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-20 18:52:29,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:52:29,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 18:52:29,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:29,986 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:29,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:30,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994025896] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:30,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:30,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 19 [2024-09-20 18:52:30,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061497123] [2024-09-20 18:52:30,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:30,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 18:52:30,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:30,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 18:52:30,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=305, Unknown=0, NotChecked=0, Total=342 [2024-09-20 18:52:30,248 INFO L87 Difference]: Start difference. First operand 296 states and 337 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:30,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:52:30,896 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2024-09-20 18:52:30,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-20 18:52:30,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2024-09-20 18:52:30,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:52:30,899 INFO L225 Difference]: With dead ends: 469 [2024-09-20 18:52:30,899 INFO L226 Difference]: Without dead ends: 451 [2024-09-20 18:52:30,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 83 SyntacticMatches, 28 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=43, Invalid=337, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:52:30,899 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 10 mSDsluCounter, 329 mSDsCounter, 0 mSdLazyCounter, 497 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 497 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:52:30,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 353 Invalid, 497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 497 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:52:30,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2024-09-20 18:52:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 332. [2024-09-20 18:52:31,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 327 states have (on average 1.1590214067278288) internal successors, (379), 327 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:31,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 383 transitions. [2024-09-20 18:52:31,170 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 383 transitions. Word has length 49 [2024-09-20 18:52:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:52:31,170 INFO L474 AbstractCegarLoop]: Abstraction has 332 states and 383 transitions. [2024-09-20 18:52:31,171 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 17 states have internal predecessors, (36), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:52:31,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:31,171 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 383 transitions. [2024-09-20 18:52:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-20 18:52:31,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:52:31,172 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:52:31,184 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-20 18:52:31,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:31,372 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:52:31,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:52:31,373 INFO L85 PathProgramCache]: Analyzing trace with hash 202552438, now seen corresponding path program 37 times [2024-09-20 18:52:31,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:52:31,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119293613] [2024-09-20 18:52:31,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:52:31,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:52:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:31,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:52:31,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:31,729 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:31,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:52:31,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119293613] [2024-09-20 18:52:31,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119293613] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:52:31,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151701884] [2024-09-20 18:52:31,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:52:31,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:52:31,730 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:52:31,731 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:52:31,732 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-20 18:52:31,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:52:31,781 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-20 18:52:31,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:52:31,849 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:31,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:52:32,683 INFO L134 CoverageAnalysis]: Checked inductivity of 247 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-20 18:52:32,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151701884] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:52:32,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:52:32,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 29, 29] total 56 [2024-09-20 18:52:32,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615664801] [2024-09-20 18:52:32,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:52:32,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-20 18:52:32,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:52:32,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-20 18:52:32,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=449, Invalid=2631, Unknown=0, NotChecked=0, Total=3080 [2024-09-20 18:52:32,685 INFO L87 Difference]: Start difference. First operand 332 states and 383 transitions. Second operand has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:43,215 INFO L93 Difference]: Finished difference Result 693 states and 810 transitions. [2024-09-20 18:53:43,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 299 states. [2024-09-20 18:53:43,215 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 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 50 [2024-09-20 18:53:43,215 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:43,217 INFO L225 Difference]: With dead ends: 693 [2024-09-20 18:53:43,217 INFO L226 Difference]: Without dead ends: 586 [2024-09-20 18:53:43,225 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41658 ImplicationChecksByTransitivity, 68.7s TimeCoverageRelationStatistics Valid=16448, Invalid=90154, Unknown=0, NotChecked=0, Total=106602 [2024-09-20 18:53:43,229 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 1728 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 342 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1728 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 1360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 342 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:43,229 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1728 Valid, 335 Invalid, 1360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [342 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2024-09-20 18:53:43,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 586 states. [2024-09-20 18:53:43,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 586 to 339. [2024-09-20 18:53:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 334 states have (on average 1.158682634730539) internal successors, (387), 334 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:43,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 391 transitions. [2024-09-20 18:53:43,555 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 391 transitions. Word has length 50 [2024-09-20 18:53:43,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:43,557 INFO L474 AbstractCegarLoop]: Abstraction has 339 states and 391 transitions. [2024-09-20 18:53:43,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1785714285714286) internal successors, (66), 56 states have internal predecessors, (66), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:43,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:43,557 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 391 transitions. [2024-09-20 18:53:43,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 18:53:43,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:43,562 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:43,574 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-20 18:53:43,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:43,762 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:43,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:43,766 INFO L85 PathProgramCache]: Analyzing trace with hash -436609882, now seen corresponding path program 38 times [2024-09-20 18:53:43,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:43,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673726099] [2024-09-20 18:53:43,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:43,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:44,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:44,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:44,117 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 18:53:44,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:44,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673726099] [2024-09-20 18:53:44,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673726099] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:44,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534547616] [2024-09-20 18:53:44,121 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:53:44,121 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:44,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:44,122 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:53:44,123 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-20 18:53:44,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:53:44,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:44,195 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 18:53:44,196 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:44,274 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 18:53:44,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:44,557 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-20 18:53:44,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [534547616] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:44,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:44,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 20 [2024-09-20 18:53:44,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855588642] [2024-09-20 18:53:44,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:44,558 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 18:53:44,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:44,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 18:53:44,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=341, Unknown=0, NotChecked=0, Total=380 [2024-09-20 18:53:44,559 INFO L87 Difference]: Start difference. First operand 339 states and 391 transitions. Second operand has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:45,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:45,156 INFO L93 Difference]: Finished difference Result 424 states and 490 transitions. [2024-09-20 18:53:45,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 18:53:45,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 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 52 [2024-09-20 18:53:45,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:45,158 INFO L225 Difference]: With dead ends: 424 [2024-09-20 18:53:45,158 INFO L226 Difference]: Without dead ends: 405 [2024-09-20 18:53:45,158 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 88 SyntacticMatches, 30 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:53:45,158 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 399 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:45,159 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 399 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 18:53:45,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2024-09-20 18:53:45,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 351. [2024-09-20 18:53:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 346 states have (on average 1.1618497109826589) internal successors, (402), 346 states have internal predecessors, (402), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2024-09-20 18:53:45,445 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 52 [2024-09-20 18:53:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:45,445 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2024-09-20 18:53:45,446 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.9) internal successors, (38), 18 states have internal predecessors, (38), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:45,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:45,446 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2024-09-20 18:53:45,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-20 18:53:45,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:45,447 INFO L216 NwaCegarLoop]: trace histogram [22, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:45,462 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-20 18:53:45,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-20 18:53:45,649 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:53:45,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:45,649 INFO L85 PathProgramCache]: Analyzing trace with hash -428518713, now seen corresponding path program 39 times [2024-09-20 18:53:45,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:53:45,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692279237] [2024-09-20 18:53:45,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:53:45,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:53:45,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:46,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:53:46,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:53:46,236 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:53:46,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:53:46,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692279237] [2024-09-20 18:53:46,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [692279237] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:53:46,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006302364] [2024-09-20 18:53:46,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:53:46,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:53:46,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:53:46,238 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:53:46,239 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-20 18:53:46,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-20 18:53:46,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:53:46,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 18:53:46,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:53:46,845 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-20 18:53:46,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:53:47,480 INFO L134 CoverageAnalysis]: Checked inductivity of 334 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2024-09-20 18:53:47,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2006302364] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:53:47,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:53:47,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 20, 20] total 61 [2024-09-20 18:53:47,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768020386] [2024-09-20 18:53:47,480 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:53:47,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-20 18:53:47,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:53:47,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-20 18:53:47,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=3416, Unknown=0, NotChecked=0, Total=3660 [2024-09-20 18:53:47,485 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:59,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:53:59,569 INFO L93 Difference]: Finished difference Result 501 states and 611 transitions. [2024-09-20 18:53:59,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 222 states. [2024-09-20 18:53:59,569 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 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 52 [2024-09-20 18:53:59,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:53:59,571 INFO L225 Difference]: With dead ends: 501 [2024-09-20 18:53:59,571 INFO L226 Difference]: Without dead ends: 425 [2024-09-20 18:53:59,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16165 ImplicationChecksByTransitivity, 11.2s TimeCoverageRelationStatistics Valid=3240, Invalid=54120, Unknown=0, NotChecked=0, Total=57360 [2024-09-20 18:53:59,574 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 221 mSDsluCounter, 828 mSDsCounter, 0 mSdLazyCounter, 6824 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 854 SdHoareTripleChecker+Invalid, 7011 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 6824 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:53:59,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [221 Valid, 854 Invalid, 7011 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 6824 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-20 18:53:59,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 425 states. [2024-09-20 18:53:59,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 425 to 370. [2024-09-20 18:53:59,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 370 states, 365 states have (on average 1.1424657534246576) internal successors, (417), 365 states have internal predecessors, (417), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:59,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 370 states to 370 states and 421 transitions. [2024-09-20 18:53:59,909 INFO L78 Accepts]: Start accepts. Automaton has 370 states and 421 transitions. Word has length 52 [2024-09-20 18:53:59,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:53:59,909 INFO L474 AbstractCegarLoop]: Abstraction has 370 states and 421 transitions. [2024-09-20 18:53:59,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.180327868852459) internal successors, (72), 61 states have internal predecessors, (72), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:53:59,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:53:59,910 INFO L276 IsEmpty]: Start isEmpty. Operand 370 states and 421 transitions. [2024-09-20 18:53:59,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-20 18:53:59,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:53:59,910 INFO L216 NwaCegarLoop]: trace histogram [23, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:53:59,922 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:00,111 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:00,111 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:00,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:00,112 INFO L85 PathProgramCache]: Analyzing trace with hash 1732839874, now seen corresponding path program 40 times [2024-09-20 18:54:00,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:00,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782747668] [2024-09-20 18:54:00,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:00,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:00,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:00,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:00,678 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 18:54:00,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:00,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782747668] [2024-09-20 18:54:00,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782747668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:00,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963220817] [2024-09-20 18:54:00,679 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:54:00,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:00,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:00,680 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:00,681 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-20 18:54:00,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:54:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:00,734 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 18:54:00,735 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 0 proven. 357 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:54:01,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:01,696 INFO L134 CoverageAnalysis]: Checked inductivity of 357 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-20 18:54:01,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963220817] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:01,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:01,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 20] total 63 [2024-09-20 18:54:01,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341086252] [2024-09-20 18:54:01,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:01,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-20 18:54:01,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:01,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-20 18:54:01,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=3162, Unknown=0, NotChecked=0, Total=3906 [2024-09-20 18:54:01,697 INFO L87 Difference]: Start difference. First operand 370 states and 421 transitions. Second operand has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:06,285 INFO L93 Difference]: Finished difference Result 720 states and 838 transitions. [2024-09-20 18:54:06,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2024-09-20 18:54:06,285 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 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 53 [2024-09-20 18:54:06,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:06,287 INFO L225 Difference]: With dead ends: 720 [2024-09-20 18:54:06,287 INFO L226 Difference]: Without dead ends: 702 [2024-09-20 18:54:06,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6387 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5119, Invalid=15761, Unknown=0, NotChecked=0, Total=20880 [2024-09-20 18:54:06,289 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 576 mSDsluCounter, 756 mSDsCounter, 0 mSdLazyCounter, 3198 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 3338 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 3198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:06,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [576 Valid, 787 Invalid, 3338 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 3198 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-20 18:54:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2024-09-20 18:54:06,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 376. [2024-09-20 18:54:06,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 371 states have (on average 1.1320754716981132) internal successors, (420), 371 states have internal predecessors, (420), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 424 transitions. [2024-09-20 18:54:06,644 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 424 transitions. Word has length 53 [2024-09-20 18:54:06,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:06,645 INFO L474 AbstractCegarLoop]: Abstraction has 376 states and 424 transitions. [2024-09-20 18:54:06,645 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.3492063492063493) internal successors, (85), 63 states have internal predecessors, (85), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:06,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:06,645 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 424 transitions. [2024-09-20 18:54:06,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-20 18:54:06,645 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:06,645 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:06,658 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-20 18:54:06,846 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:06,846 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:06,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:06,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1452158177, now seen corresponding path program 41 times [2024-09-20 18:54:06,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:06,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331116291] [2024-09-20 18:54:06,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:06,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:06,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:07,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:07,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:07,231 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 18:54:07,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331116291] [2024-09-20 18:54:07,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331116291] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:07,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1045291447] [2024-09-20 18:54:07,231 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 18:54:07,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:07,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:07,233 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:07,234 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-20 18:54:07,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 18:54:07,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:07,941 INFO L262 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-20 18:54:07,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:08,027 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 18:54:08,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:08,349 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-20 18:54:08,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1045291447] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:08,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:08,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 21 [2024-09-20 18:54:08,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355361842] [2024-09-20 18:54:08,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:08,350 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 18:54:08,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:08,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 18:54:08,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2024-09-20 18:54:08,351 INFO L87 Difference]: Start difference. First operand 376 states and 424 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:09,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:09,203 INFO L93 Difference]: Finished difference Result 459 states and 516 transitions. [2024-09-20 18:54:09,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-20 18:54:09,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 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 55 [2024-09-20 18:54:09,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:09,205 INFO L225 Difference]: With dead ends: 459 [2024-09-20 18:54:09,206 INFO L226 Difference]: Without dead ends: 439 [2024-09-20 18:54:09,206 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 93 SyntacticMatches, 32 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:54:09,208 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 11 mSDsluCounter, 443 mSDsCounter, 0 mSdLazyCounter, 670 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 470 SdHoareTripleChecker+Invalid, 670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 670 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:09,208 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 470 Invalid, 670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 670 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:54:09,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2024-09-20 18:54:09,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 388. [2024-09-20 18:54:09,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.133159268929504) internal successors, (434), 383 states have internal predecessors, (434), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:09,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 438 transitions. [2024-09-20 18:54:09,557 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 438 transitions. Word has length 55 [2024-09-20 18:54:09,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:09,557 INFO L474 AbstractCegarLoop]: Abstraction has 388 states and 438 transitions. [2024-09-20 18:54:09,557 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 19 states have internal predecessors, (40), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:09,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:09,558 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 438 transitions. [2024-09-20 18:54:09,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-20 18:54:09,558 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:09,558 INFO L216 NwaCegarLoop]: trace histogram [24, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:09,573 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:09,759 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-20 18:54:09,759 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:09,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:09,760 INFO L85 PathProgramCache]: Analyzing trace with hash 1240281910, now seen corresponding path program 42 times [2024-09-20 18:54:09,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:09,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554648137] [2024-09-20 18:54:09,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:09,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:09,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:10,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:10,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:54:10,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554648137] [2024-09-20 18:54:10,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554648137] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:10,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [309147446] [2024-09-20 18:54:10,359 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 18:54:10,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:10,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:10,360 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:10,361 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-20 18:54:10,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-20 18:54:10,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:10,573 INFO L262 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-20 18:54:10,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:11,259 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-20 18:54:11,259 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 300 trivial. 0 not checked. [2024-09-20 18:54:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [309147446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:12,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 22, 22] total 67 [2024-09-20 18:54:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153377919] [2024-09-20 18:54:12,183 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:12,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-20 18:54:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-20 18:54:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=4142, Unknown=0, NotChecked=0, Total=4422 [2024-09-20 18:54:12,184 INFO L87 Difference]: Start difference. First operand 388 states and 438 transitions. Second operand has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:31,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:31,157 INFO L93 Difference]: Finished difference Result 522 states and 625 transitions. [2024-09-20 18:54:31,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 286 states. [2024-09-20 18:54:31,157 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 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 56 [2024-09-20 18:54:31,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:31,159 INFO L225 Difference]: With dead ends: 522 [2024-09-20 18:54:31,159 INFO L226 Difference]: Without dead ends: 438 [2024-09-20 18:54:31,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 76 SyntacticMatches, 9 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28731 ImplicationChecksByTransitivity, 17.6s TimeCoverageRelationStatistics Valid=4553, Invalid=88777, Unknown=0, NotChecked=0, Total=93330 [2024-09-20 18:54:31,164 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 290 mSDsluCounter, 1056 mSDsCounter, 0 mSdLazyCounter, 9145 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 290 SdHoareTripleChecker+Valid, 1085 SdHoareTripleChecker+Invalid, 9346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:31,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [290 Valid, 1085 Invalid, 9346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9145 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2024-09-20 18:54:31,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2024-09-20 18:54:31,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 414. [2024-09-20 18:54:31,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 409 states have (on average 1.117359413202934) internal successors, (457), 409 states have internal predecessors, (457), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 461 transitions. [2024-09-20 18:54:31,536 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 461 transitions. Word has length 56 [2024-09-20 18:54:31,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:31,536 INFO L474 AbstractCegarLoop]: Abstraction has 414 states and 461 transitions. [2024-09-20 18:54:31,536 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.164179104477612) internal successors, (78), 67 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:31,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:31,536 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 461 transitions. [2024-09-20 18:54:31,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-20 18:54:31,537 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:31,537 INFO L216 NwaCegarLoop]: trace histogram [25, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:31,552 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-09-20 18:54:31,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-20 18:54:31,738 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:31,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:31,738 INFO L85 PathProgramCache]: Analyzing trace with hash -824573133, now seen corresponding path program 43 times [2024-09-20 18:54:31,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:31,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786161737] [2024-09-20 18:54:31,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:31,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:32,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:32,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 18:54:32,260 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786161737] [2024-09-20 18:54:32,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786161737] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:32,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440776108] [2024-09-20 18:54:32,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 18:54:32,260 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:32,260 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:32,268 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:32,270 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-20 18:54:32,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:32,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 92 conjuncts are in the unsatisfiable core [2024-09-20 18:54:32,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:32,574 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 0 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:54:32,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:33,247 INFO L134 CoverageAnalysis]: Checked inductivity of 425 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2024-09-20 18:54:33,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440776108] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:33,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:33,248 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38, 22] total 69 [2024-09-20 18:54:33,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976515564] [2024-09-20 18:54:33,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:33,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-20 18:54:33,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:33,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-20 18:54:33,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=885, Invalid=3807, Unknown=0, NotChecked=0, Total=4692 [2024-09-20 18:54:33,249 INFO L87 Difference]: Start difference. First operand 414 states and 461 transitions. Second operand has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:39,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:39,377 INFO L93 Difference]: Finished difference Result 890 states and 1028 transitions. [2024-09-20 18:54:39,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-20 18:54:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 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 57 [2024-09-20 18:54:39,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:39,380 INFO L225 Difference]: With dead ends: 890 [2024-09-20 18:54:39,380 INFO L226 Difference]: Without dead ends: 872 [2024-09-20 18:54:39,381 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9442 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=7099, Invalid=21631, Unknown=0, NotChecked=0, Total=28730 [2024-09-20 18:54:39,382 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 1015 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 4955 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1015 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 5239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 4955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:39,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1015 Valid, 1151 Invalid, 5239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 4955 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-20 18:54:39,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2024-09-20 18:54:39,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 418. [2024-09-20 18:54:39,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.1089588377723971) internal successors, (458), 413 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:39,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 462 transitions. [2024-09-20 18:54:39,789 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 462 transitions. Word has length 57 [2024-09-20 18:54:39,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:39,789 INFO L474 AbstractCegarLoop]: Abstraction has 418 states and 462 transitions. [2024-09-20 18:54:39,789 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3333333333333333) internal successors, (92), 69 states have internal predecessors, (92), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:39,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:39,789 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 462 transitions. [2024-09-20 18:54:39,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-20 18:54:39,790 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:39,790 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:39,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:39,994 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:39,995 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:39,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:39,995 INFO L85 PathProgramCache]: Analyzing trace with hash -2071487674, now seen corresponding path program 44 times [2024-09-20 18:54:39,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:39,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929114114] [2024-09-20 18:54:39,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:39,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:40,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:40,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:40,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:40,392 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 18:54:40,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929114114] [2024-09-20 18:54:40,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929114114] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:40,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565167411] [2024-09-20 18:54:40,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 18:54:40,392 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:40,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:40,394 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:40,395 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-20 18:54:40,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 18:54:40,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:40,446 INFO L262 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 94 conjuncts are in the unsatisfiable core [2024-09-20 18:54:40,447 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 18:54:40,534 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 360 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-20 18:54:40,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565167411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:40,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 22 [2024-09-20 18:54:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907715703] [2024-09-20 18:54:40,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:40,884 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 18:54:40,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 18:54:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=419, Unknown=0, NotChecked=0, Total=462 [2024-09-20 18:54:40,884 INFO L87 Difference]: Start difference. First operand 418 states and 462 transitions. Second operand has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:41,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:41,846 INFO L93 Difference]: Finished difference Result 532 states and 584 transitions. [2024-09-20 18:54:41,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 18:54:41,846 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 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 58 [2024-09-20 18:54:41,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:41,848 INFO L225 Difference]: With dead ends: 532 [2024-09-20 18:54:41,848 INFO L226 Difference]: Without dead ends: 511 [2024-09-20 18:54:41,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 98 SyntacticMatches, 34 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=49, Invalid=457, Unknown=0, NotChecked=0, Total=506 [2024-09-20 18:54:41,848 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 12 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 705 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 705 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:41,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 473 Invalid, 705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 705 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 18:54:41,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-20 18:54:42,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 432. [2024-09-20 18:54:42,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 427 states have (on average 1.1100702576112411) internal successors, (474), 427 states have internal predecessors, (474), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:42,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 478 transitions. [2024-09-20 18:54:42,241 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 478 transitions. Word has length 58 [2024-09-20 18:54:42,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:42,241 INFO L474 AbstractCegarLoop]: Abstraction has 432 states and 478 transitions. [2024-09-20 18:54:42,241 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9090909090909092) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:42,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:42,241 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 478 transitions. [2024-09-20 18:54:42,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-20 18:54:42,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:42,242 INFO L216 NwaCegarLoop]: trace histogram [20, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:42,254 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-20 18:54:42,446 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-20 18:54:42,447 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:42,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:42,447 INFO L85 PathProgramCache]: Analyzing trace with hash -1584056173, now seen corresponding path program 45 times [2024-09-20 18:54:42,447 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:42,447 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433021992] [2024-09-20 18:54:42,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:42,447 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:42,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:42,852 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:54:42,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433021992] [2024-09-20 18:54:42,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433021992] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:42,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603056289] [2024-09-20 18:54:42,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 18:54:42,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:42,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:42,853 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:42,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-20 18:54:43,196 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-20 18:54:43,196 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:43,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 84 conjuncts are in the unsatisfiable core [2024-09-20 18:54:43,199 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:43,539 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:54:43,540 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:44,400 INFO L134 CoverageAnalysis]: Checked inductivity of 392 backedges. 98 proven. 182 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-20 18:54:44,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603056289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:44,400 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:44,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 72 [2024-09-20 18:54:44,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135774863] [2024-09-20 18:54:44,401 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:44,401 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-20 18:54:44,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:44,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-20 18:54:44,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=757, Invalid=4355, Unknown=0, NotChecked=0, Total=5112 [2024-09-20 18:54:44,402 INFO L87 Difference]: Start difference. First operand 432 states and 478 transitions. Second operand has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:55,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 18:54:55,654 INFO L93 Difference]: Finished difference Result 739 states and 813 transitions. [2024-09-20 18:54:55,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2024-09-20 18:54:55,655 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 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 59 [2024-09-20 18:54:55,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 18:54:55,657 INFO L225 Difference]: With dead ends: 739 [2024-09-20 18:54:55,657 INFO L226 Difference]: Without dead ends: 698 [2024-09-20 18:54:55,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7464 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=5216, Invalid=21190, Unknown=0, NotChecked=0, Total=26406 [2024-09-20 18:54:55,659 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 624 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 1049 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 624 SdHoareTripleChecker+Valid, 390 SdHoareTripleChecker+Invalid, 1327 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 1049 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 18:54:55,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [624 Valid, 390 Invalid, 1327 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 1049 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 18:54:55,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 698 states. [2024-09-20 18:54:56,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 698 to 453. [2024-09-20 18:54:56,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 448 states have (on average 1.1205357142857142) internal successors, (502), 448 states have internal predecessors, (502), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:56,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 506 transitions. [2024-09-20 18:54:56,123 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 506 transitions. Word has length 59 [2024-09-20 18:54:56,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 18:54:56,123 INFO L474 AbstractCegarLoop]: Abstraction has 453 states and 506 transitions. [2024-09-20 18:54:56,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.2083333333333333) internal successors, (87), 72 states have internal predecessors, (87), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 18:54:56,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:56,124 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 506 transitions. [2024-09-20 18:54:56,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-20 18:54:56,128 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 18:54:56,128 INFO L216 NwaCegarLoop]: trace histogram [26, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 18:54:56,140 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-20 18:54:56,328 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:56,329 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 18:54:56,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 18:54:56,329 INFO L85 PathProgramCache]: Analyzing trace with hash -213028330, now seen corresponding path program 46 times [2024-09-20 18:54:56,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 18:54:56,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135164506] [2024-09-20 18:54:56,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 18:54:56,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 18:54:56,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:57,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 18:54:57,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 18:54:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 417 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-20 18:54:57,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 18:54:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135164506] [2024-09-20 18:54:57,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135164506] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 18:54:57,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614589532] [2024-09-20 18:54:57,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 18:54:57,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 18:54:57,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 18:54:57,021 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-20 18:54:57,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-20 18:54:57,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 18:54:57,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 18:54:57,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 98 conjuncts are in the unsatisfiable core [2024-09-20 18:54:57,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 18:54:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 0 proven. 472 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 18:54:57,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 18:54:58,388 INFO L134 CoverageAnalysis]: Checked inductivity of 472 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 351 trivial. 0 not checked. [2024-09-20 18:54:58,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614589532] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 18:54:58,388 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 18:54:58,388 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40, 24] total 74 [2024-09-20 18:54:58,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842118028] [2024-09-20 18:54:58,389 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 18:54:58,389 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-20 18:54:58,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 18:54:58,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-20 18:54:58,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1014, Invalid=4388, Unknown=0, NotChecked=0, Total=5402 [2024-09-20 18:54:58,390 INFO L87 Difference]: Start difference. First operand 453 states and 506 transitions. Second operand has 74 states, 74 states have (on average 1.3243243243243243) internal successors, (98), 74 states have internal predecessors, (98), 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)