./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loop-invgen/seq-3.i --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loop-invgen/seq-3.i -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 --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-de32597-m [2024-09-17 18:16:35,599 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:16:35,662 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:16:35,668 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:16:35,669 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:16:35,687 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:16:35,688 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:16:35,688 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:16:35,689 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:16:35,689 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:16:35,689 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:16:35,690 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:16:35,690 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:16:35,691 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:16:35,691 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:16:35,691 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:16:35,692 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:16:35,692 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:16:35,692 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:16:35,693 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:16:35,693 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:16:35,694 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:16:35,694 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:16:35,694 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:16:35,695 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:16:35,695 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:16:35,695 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:16:35,696 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:16:35,696 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:16:35,696 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:16:35,697 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:16:35,697 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:16:35,697 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:16:35,698 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:16:35,698 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:16:35,698 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:16:35,699 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:16:35,699 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:16:35,699 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:16:35,699 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:16:35,700 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:16:35,702 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:16:35,702 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6c770a3141edeab927df0da4e8c2152e1fb2e87b0c43a352500a7e3d3cff4533 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:16:35,951 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:16:35,990 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:16:35,993 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:16:35,995 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:16:35,995 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:16:35,996 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-17 18:16:37,633 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:16:37,834 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:16:37,834 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i [2024-09-17 18:16:37,843 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f98b75256/eceb0c47133048988297e1d654c35d5c/FLAGcaf2166eb [2024-09-17 18:16:38,209 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f98b75256/eceb0c47133048988297e1d654c35d5c [2024-09-17 18:16:38,212 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:16:38,213 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:16:38,214 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:16:38,214 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:16:38,223 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:16:38,224 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,225 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1eb3a0c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38, skipping insertion in model container [2024-09-17 18:16:38,225 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,244 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:16:38,391 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-17 18:16:38,409 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:16:38,417 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:16:38,428 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loop-invgen/seq-3.i[893,906] [2024-09-17 18:16:38,463 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:16:38,483 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:16:38,484 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38 WrapperNode [2024-09-17 18:16:38,484 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:16:38,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:16:38,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:16:38,486 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:16:38,493 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,499 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,506 INFO L138 Inliner]: procedures = 16, calls = 7, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:16:38,506 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:16:38,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:16:38,507 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:16:38,507 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:16:38,519 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,520 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,533 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]. [2024-09-17 18:16:38,534 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,534 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,536 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,540 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,541 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,541 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,543 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:16:38,544 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:16:38,544 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:16:38,544 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:16:38,545 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (1/1) ... [2024-09-17 18:16:38,570 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:16:38,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:38,612 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) [2024-09-17 18:16:38,619 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 [2024-09-17 18:16:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:16:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:16:38,667 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:16:38,667 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:16:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:16:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:16:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:16:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:16:38,668 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:16:38,668 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:16:38,727 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:16:38,730 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:16:38,853 INFO L? ?]: Removed 10 outVars from TransFormulas that were not future-live. [2024-09-17 18:16:38,854 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:16:38,874 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:16:38,875 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-17 18:16:38,875 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:16:38 BoogieIcfgContainer [2024-09-17 18:16:38,875 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:16:38,877 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:16:38,877 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:16:38,881 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:16:38,881 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:16:38" (1/3) ... [2024-09-17 18:16:38,882 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67db7a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:16:38, skipping insertion in model container [2024-09-17 18:16:38,882 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:16:38" (2/3) ... [2024-09-17 18:16:38,883 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67db7a4d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:16:38, skipping insertion in model container [2024-09-17 18:16:38,883 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:16:38" (3/3) ... [2024-09-17 18:16:38,885 INFO L112 eAbstractionObserver]: Analyzing ICFG seq-3.i [2024-09-17 18:16:38,901 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:16:38,901 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:16:38,952 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:16:38,958 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;@69114b59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:16:38,959 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:16:38,963 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 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) [2024-09-17 18:16:38,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-17 18:16:38,970 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:38,970 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:38,971 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:38,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:38,976 INFO L85 PathProgramCache]: Analyzing trace with hash 961061654, now seen corresponding path program 1 times [2024-09-17 18:16:38,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:38,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696117017] [2024-09-17 18:16:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:38,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:39,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:39,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:39,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696117017] [2024-09-17 18:16:39,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696117017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:39,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:16:39,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-17 18:16:39,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338612254] [2024-09-17 18:16:39,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:39,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-17 18:16:39,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:39,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-17 18:16:39,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-17 18:16:39,407 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.625) internal successors, (26), 17 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:16:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:39,511 INFO L93 Difference]: Finished difference Result 52 states and 77 transitions. [2024-09-17 18:16:39,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 18:16:39,516 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-17 18:16:39,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:39,524 INFO L225 Difference]: With dead ends: 52 [2024-09-17 18:16:39,524 INFO L226 Difference]: Without dead ends: 28 [2024-09-17 18:16:39,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:16:39,531 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 11 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:39,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 87 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:39,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-17 18:16:39,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 23. [2024-09-17 18:16:39,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 states have internal predecessors, (21), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:16:39,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2024-09-17 18:16:39,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 16 [2024-09-17 18:16:39,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:39,569 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2024-09-17 18:16:39,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:16:39,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:39,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2024-09-17 18:16:39,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-17 18:16:39,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:39,571 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:39,571 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:16:39,572 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:39,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:39,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1906170241, now seen corresponding path program 1 times [2024-09-17 18:16:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:39,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520523771] [2024-09-17 18:16:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:39,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:39,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:39,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:39,699 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:39,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:39,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520523771] [2024-09-17 18:16:39,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520523771] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:39,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361281313] [2024-09-17 18:16:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:39,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:39,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:39,711 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) [2024-09-17 18:16:39,721 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 18:16:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:39,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-17 18:16:39,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:39,915 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:16:39,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361281313] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:16:39,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:16:39,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [6] total 9 [2024-09-17 18:16:39,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201010761] [2024-09-17 18:16:39,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:16:39,919 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-17 18:16:39,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:39,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-17 18:16:39,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-09-17 18:16:39,921 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:16:39,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:39,971 INFO L93 Difference]: Finished difference Result 35 states and 39 transitions. [2024-09-17 18:16:39,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:16:39,971 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-17 18:16:39,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:39,972 INFO L225 Difference]: With dead ends: 35 [2024-09-17 18:16:39,973 INFO L226 Difference]: Without dead ends: 33 [2024-09-17 18:16:39,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:16:39,974 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:39,975 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 71 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:16:39,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-17 18:16:39,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 29. [2024-09-17 18:16:39,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 22 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:16:39,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 32 transitions. [2024-09-17 18:16:39,982 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 32 transitions. Word has length 17 [2024-09-17 18:16:39,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:39,982 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 32 transitions. [2024-09-17 18:16:39,983 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:16:39,983 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:39,983 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 32 transitions. [2024-09-17 18:16:39,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-17 18:16:39,984 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:39,984 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:40,003 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:40,187 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:40,188 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:40,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:40,189 INFO L85 PathProgramCache]: Analyzing trace with hash 468810935, now seen corresponding path program 1 times [2024-09-17 18:16:40,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:40,189 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351601121] [2024-09-17 18:16:40,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:40,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:40,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:40,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:40,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 18:16:40,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351601121] [2024-09-17 18:16:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [351601121] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121459533] [2024-09-17 18:16:40,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:40,366 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:40,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:40,372 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) [2024-09-17 18:16:40,375 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 18:16:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:40,448 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:16:40,449 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:40,605 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:40,606 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:40,688 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:40,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121459533] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:40,688 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:40,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-17 18:16:40,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1889826626] [2024-09-17 18:16:40,689 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:40,689 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:16:40,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:40,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:16:40,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:16:40,691 INFO L87 Difference]: Start difference. First operand 29 states and 32 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:40,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:40,786 INFO L93 Difference]: Finished difference Result 51 states and 59 transitions. [2024-09-17 18:16:40,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:16:40,787 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-17 18:16:40,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:40,789 INFO L225 Difference]: With dead ends: 51 [2024-09-17 18:16:40,789 INFO L226 Difference]: Without dead ends: 37 [2024-09-17 18:16:40,790 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:16:40,791 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 6 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:40,792 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:40,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2024-09-17 18:16:40,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2024-09-17 18:16:40,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:16:40,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2024-09-17 18:16:40,799 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2024-09-17 18:16:40,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:40,799 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2024-09-17 18:16:40,799 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:40,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:40,800 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2024-09-17 18:16:40,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-17 18:16:40,801 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:40,801 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:40,819 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 18:16:41,005 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:41,006 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:41,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:41,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1260603702, now seen corresponding path program 1 times [2024-09-17 18:16:41,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:41,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201552423] [2024-09-17 18:16:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:41,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 18:16:41,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,110 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:41,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201552423] [2024-09-17 18:16:41,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201552423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:41,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [248152268] [2024-09-17 18:16:41,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:41,111 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:41,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:41,117 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) [2024-09-17 18:16:41,133 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 18:16:41,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,172 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 18:16:41,174 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:41,269 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:41,338 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [248152268] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:41,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:41,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 16 [2024-09-17 18:16:41,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177355219] [2024-09-17 18:16:41,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:41,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:16:41,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:41,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:16:41,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:16:41,342 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:41,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:41,408 INFO L93 Difference]: Finished difference Result 54 states and 63 transitions. [2024-09-17 18:16:41,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:16:41,408 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 24 [2024-09-17 18:16:41,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:41,409 INFO L225 Difference]: With dead ends: 54 [2024-09-17 18:16:41,409 INFO L226 Difference]: Without dead ends: 40 [2024-09-17 18:16:41,410 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:16:41,410 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:41,411 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 105 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:16:41,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2024-09-17 18:16:41,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 32. [2024-09-17 18:16:41,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:16:41,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2024-09-17 18:16:41,417 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 24 [2024-09-17 18:16:41,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:41,417 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2024-09-17 18:16:41,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 5 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:41,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:41,418 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2024-09-17 18:16:41,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:16:41,418 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:41,418 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:41,433 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:41,619 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:41,620 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:41,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1756686302, now seen corresponding path program 2 times [2024-09-17 18:16:41,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:41,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993042270] [2024-09-17 18:16:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:41,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:41,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:41,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-17 18:16:41,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:41,700 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993042270] [2024-09-17 18:16:41,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993042270] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:41,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92375763] [2024-09-17 18:16:41,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:41,701 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:41,701 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:41,703 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) [2024-09-17 18:16:41,710 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 18:16:41,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:41,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:41,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:16:41,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,790 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:41,843 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:16:41,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92375763] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:41,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:41,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 10 [2024-09-17 18:16:41,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496592805] [2024-09-17 18:16:41,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:41,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-17 18:16:41,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:41,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-17 18:16:41,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-17 18:16:41,845 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:16:41,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:41,907 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2024-09-17 18:16:41,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 18:16:41,907 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2024-09-17 18:16:41,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:41,908 INFO L225 Difference]: With dead ends: 45 [2024-09-17 18:16:41,908 INFO L226 Difference]: Without dead ends: 43 [2024-09-17 18:16:41,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 47 SyntacticMatches, 6 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:16:41,910 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 8 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 70 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 70 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:41,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 113 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 70 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:16:41,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-17 18:16:41,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 39. [2024-09-17 18:16:41,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:41,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 43 transitions. [2024-09-17 18:16:41,917 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 43 transitions. Word has length 25 [2024-09-17 18:16:41,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:41,917 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 43 transitions. [2024-09-17 18:16:41,917 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 8 states have internal predecessors, (27), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:16:41,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:41,918 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 43 transitions. [2024-09-17 18:16:41,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:16:41,919 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:41,919 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:41,939 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 18:16:42,119 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:42,120 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:42,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:42,121 INFO L85 PathProgramCache]: Analyzing trace with hash -2027964682, now seen corresponding path program 3 times [2024-09-17 18:16:42,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:42,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041455103] [2024-09-17 18:16:42,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:42,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:42,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:42,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-17 18:16:42,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:16:42,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:42,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041455103] [2024-09-17 18:16:42,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041455103] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:42,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131712949] [2024-09-17 18:16:42,262 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:16:42,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:42,263 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) [2024-09-17 18:16:42,264 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 18:16:42,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:16:42,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:42,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:16:42,306 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:42,450 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:42,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:42,537 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:42,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131712949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:42,538 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:42,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-17 18:16:42,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961070155] [2024-09-17 18:16:42,538 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:42,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:16:42,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:42,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:16:42,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:16:42,540 INFO L87 Difference]: Start difference. First operand 39 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:42,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:42,657 INFO L93 Difference]: Finished difference Result 68 states and 79 transitions. [2024-09-17 18:16:42,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:42,658 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-17 18:16:42,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:42,659 INFO L225 Difference]: With dead ends: 68 [2024-09-17 18:16:42,659 INFO L226 Difference]: Without dead ends: 51 [2024-09-17 18:16:42,659 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 55 SyntacticMatches, 6 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:16:42,660 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:42,660 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 170 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:42,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-17 18:16:42,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-17 18:16:42,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:42,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-17 18:16:42,667 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-17 18:16:42,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:42,667 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-17 18:16:42,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.9047619047619047) internal successors, (40), 21 states have internal predecessors, (40), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:42,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:42,668 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-17 18:16:42,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:16:42,669 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:42,669 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:42,691 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:42,873 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:16:42,874 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:42,875 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:42,875 INFO L85 PathProgramCache]: Analyzing trace with hash 196646005, now seen corresponding path program 1 times [2024-09-17 18:16:42,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:42,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345768047] [2024-09-17 18:16:42,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:42,876 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:42,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-17 18:16:42,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,995 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:16:42,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:42,999 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:42,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345768047] [2024-09-17 18:16:43,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345768047] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:43,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038480367] [2024-09-17 18:16:43,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:43,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:43,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:43,002 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) [2024-09-17 18:16:43,004 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 18:16:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:43,042 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:16:43,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:43,169 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:43,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:43,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:43,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038480367] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:43,256 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:43,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 20 [2024-09-17 18:16:43,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735331666] [2024-09-17 18:16:43,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:43,257 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:16:43,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:43,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:16:43,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:16:43,258 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:43,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:43,347 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2024-09-17 18:16:43,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:43,347 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-17 18:16:43,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:43,348 INFO L225 Difference]: With dead ends: 69 [2024-09-17 18:16:43,349 INFO L226 Difference]: Without dead ends: 52 [2024-09-17 18:16:43,349 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 56 SyntacticMatches, 6 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:16:43,350 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:43,350 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 136 Invalid, 131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:43,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-09-17 18:16:43,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2024-09-17 18:16:43,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 30 states have (on average 1.1666666666666667) internal successors, (35), 31 states have internal predecessors, (35), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 44 transitions. [2024-09-17 18:16:43,357 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 44 transitions. Word has length 32 [2024-09-17 18:16:43,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:43,358 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 44 transitions. [2024-09-17 18:16:43,358 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.95) internal successors, (39), 20 states have internal predecessors, (39), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:43,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:43,358 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 44 transitions. [2024-09-17 18:16:43,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:16:43,359 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:43,359 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:43,376 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 18:16:43,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:43,561 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:43,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:43,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1948349674, now seen corresponding path program 2 times [2024-09-17 18:16:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:43,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10678694] [2024-09-17 18:16:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:43,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:43,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:43,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:43,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 14 [2024-09-17 18:16:43,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:43,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:16:43,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:43,687 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10678694] [2024-09-17 18:16:43,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10678694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:43,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530169354] [2024-09-17 18:16:43,688 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:43,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:43,690 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) [2024-09-17 18:16:43,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 18:16:43,727 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:43,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:43,728 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 18:16:43,729 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:43,837 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:43,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:43,926 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 11 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:43,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [530169354] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:43,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:43,927 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2024-09-17 18:16:43,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252736457] [2024-09-17 18:16:43,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:43,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:16:43,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:43,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:16:43,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:16:43,929 INFO L87 Difference]: Start difference. First operand 40 states and 44 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:44,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:44,011 INFO L93 Difference]: Finished difference Result 71 states and 83 transitions. [2024-09-17 18:16:44,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:44,011 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 32 [2024-09-17 18:16:44,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:44,012 INFO L225 Difference]: With dead ends: 71 [2024-09-17 18:16:44,012 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 18:16:44,012 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 57 SyntacticMatches, 6 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:16:44,013 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:44,013 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 156 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:44,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 18:16:44,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 42. [2024-09-17 18:16:44,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 32 states have (on average 1.1875) internal successors, (38), 33 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 4 states have return successors, (4), 3 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:44,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 47 transitions. [2024-09-17 18:16:44,020 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 47 transitions. Word has length 32 [2024-09-17 18:16:44,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:44,020 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 47 transitions. [2024-09-17 18:16:44,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 7 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:44,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 47 transitions. [2024-09-17 18:16:44,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-17 18:16:44,021 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:44,022 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:44,038 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 18:16:44,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:44,223 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:44,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:44,224 INFO L85 PathProgramCache]: Analyzing trace with hash 21542753, now seen corresponding path program 4 times [2024-09-17 18:16:44,224 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:44,224 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062049292] [2024-09-17 18:16:44,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:44,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:44,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:44,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:44,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:44,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,299 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 7 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:44,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:44,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062049292] [2024-09-17 18:16:44,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062049292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:44,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396448100] [2024-09-17 18:16:44,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:16:44,300 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:44,300 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:44,303 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) [2024-09-17 18:16:44,307 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 18:16:44,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:16:44,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:44,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:44,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:44,388 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:44,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:44,441 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:16:44,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396448100] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:44,442 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:44,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-17 18:16:44,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336364182] [2024-09-17 18:16:44,442 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:44,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 18:16:44,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:44,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 18:16:44,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:16:44,443 INFO L87 Difference]: Start difference. First operand 42 states and 47 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:16:44,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:44,502 INFO L93 Difference]: Finished difference Result 55 states and 61 transitions. [2024-09-17 18:16:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:16:44,502 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 33 [2024-09-17 18:16:44,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:44,503 INFO L225 Difference]: With dead ends: 55 [2024-09-17 18:16:44,503 INFO L226 Difference]: Without dead ends: 53 [2024-09-17 18:16:44,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 66 SyntacticMatches, 6 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:16:44,504 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 10 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:44,505 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 137 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:16:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-17 18:16:44,510 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 49. [2024-09-17 18:16:44,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.162162162162162) internal successors, (43), 38 states have internal predecessors, (43), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:44,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 54 transitions. [2024-09-17 18:16:44,511 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 54 transitions. Word has length 33 [2024-09-17 18:16:44,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:44,511 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 54 transitions. [2024-09-17 18:16:44,511 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 9 states have internal predecessors, (30), 4 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:16:44,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:44,512 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 54 transitions. [2024-09-17 18:16:44,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 18:16:44,513 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:44,513 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:44,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 18:16:44,713 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:44,714 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:44,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:44,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1043643689, now seen corresponding path program 5 times [2024-09-17 18:16:44,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:44,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290264335] [2024-09-17 18:16:44,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:44,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:44,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:16:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:44,852 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:44,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:44,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290264335] [2024-09-17 18:16:44,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290264335] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:44,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456800260] [2024-09-17 18:16:44,853 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:16:44,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:44,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:44,856 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) [2024-09-17 18:16:44,862 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 18:16:44,908 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-17 18:16:44,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:44,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:44,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:45,098 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:45,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:45,205 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:45,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456800260] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:45,205 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:45,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 25 [2024-09-17 18:16:45,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315723882] [2024-09-17 18:16:45,205 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:45,206 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 18:16:45,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:45,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 18:16:45,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:16:45,207 INFO L87 Difference]: Start difference. First operand 49 states and 54 transitions. Second operand has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:45,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:45,351 INFO L93 Difference]: Finished difference Result 85 states and 99 transitions. [2024-09-17 18:16:45,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:16:45,351 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-17 18:16:45,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:45,352 INFO L225 Difference]: With dead ends: 85 [2024-09-17 18:16:45,352 INFO L226 Difference]: Without dead ends: 65 [2024-09-17 18:16:45,353 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 8 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:16:45,354 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 230 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:45,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 247 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 230 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:45,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-17 18:16:45,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2024-09-17 18:16:45,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:45,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-17 18:16:45,362 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-17 18:16:45,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:45,363 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-17 18:16:45,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.84) internal successors, (46), 25 states have internal predecessors, (46), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:45,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:45,363 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-17 18:16:45,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 18:16:45,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:45,364 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:45,380 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-17 18:16:45,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 18:16:45,569 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:45,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:45,569 INFO L85 PathProgramCache]: Analyzing trace with hash -802541226, now seen corresponding path program 2 times [2024-09-17 18:16:45,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:45,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779954155] [2024-09-17 18:16:45,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:45,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:45,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:45,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:45,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:45,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:45,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:16:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:45,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:45,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779954155] [2024-09-17 18:16:45,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779954155] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:45,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748648434] [2024-09-17 18:16:45,723 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:45,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:45,724 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:45,725 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) [2024-09-17 18:16:45,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 18:16:45,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:45,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:45,769 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:45,771 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:45,948 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:45,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:46,063 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:46,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748648434] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:46,064 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:46,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 24 [2024-09-17 18:16:46,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429692454] [2024-09-17 18:16:46,065 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:46,065 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-17 18:16:46,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-17 18:16:46,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:16:46,067 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:46,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:46,181 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-17 18:16:46,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:16:46,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-17 18:16:46,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:46,183 INFO L225 Difference]: With dead ends: 87 [2024-09-17 18:16:46,183 INFO L226 Difference]: Without dead ends: 67 [2024-09-17 18:16:46,184 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 70 SyntacticMatches, 8 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:16:46,184 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 6 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:46,184 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 190 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:46,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-17 18:16:46,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-17 18:16:46,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:46,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-17 18:16:46,191 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-17 18:16:46,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:46,192 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-17 18:16:46,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:46,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:46,192 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-17 18:16:46,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 18:16:46,193 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:46,193 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:46,209 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-17 18:16:46,397 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 18:16:46,398 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:46,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:46,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1560540919, now seen corresponding path program 3 times [2024-09-17 18:16:46,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:46,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438916416] [2024-09-17 18:16:46,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:46,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:46,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:46,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:46,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:46,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:46,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:46,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:46,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:46,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:16:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:46,520 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 14 proven. 11 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:46,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438916416] [2024-09-17 18:16:46,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438916416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:46,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341016607] [2024-09-17 18:16:46,521 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:16:46,521 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:46,521 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:46,522 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) [2024-09-17 18:16:46,524 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 18:16:46,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:16:46,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:46,563 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:46,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:46,714 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:46,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:46,815 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 21 proven. 4 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:46,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341016607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:46,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:46,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 23 [2024-09-17 18:16:46,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525383016] [2024-09-17 18:16:46,816 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:46,816 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:16:46,816 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:46,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:16:46,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:16:46,817 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:46,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:46,918 INFO L93 Difference]: Finished difference Result 87 states and 101 transitions. [2024-09-17 18:16:46,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:16:46,918 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-17 18:16:46,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:46,919 INFO L225 Difference]: With dead ends: 87 [2024-09-17 18:16:46,919 INFO L226 Difference]: Without dead ends: 67 [2024-09-17 18:16:46,920 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 8 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:16:46,921 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:46,921 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 154 Invalid, 164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:46,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-17 18:16:46,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2024-09-17 18:16:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 39 states have internal predecessors, (44), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:46,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 55 transitions. [2024-09-17 18:16:46,928 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 55 transitions. Word has length 40 [2024-09-17 18:16:46,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:46,928 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 55 transitions. [2024-09-17 18:16:46,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9130434782608696) internal successors, (44), 23 states have internal predecessors, (44), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:46,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:46,929 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 55 transitions. [2024-09-17 18:16:46,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-17 18:16:46,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:46,930 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:46,946 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:47,130 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:47,131 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:47,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:47,132 INFO L85 PathProgramCache]: Analyzing trace with hash 251296054, now seen corresponding path program 3 times [2024-09-17 18:16:47,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:47,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632927762] [2024-09-17 18:16:47,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:47,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:47,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:47,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-17 18:16:47,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:16:47,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,265 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:16:47,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,268 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 14 proven. 13 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:47,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632927762] [2024-09-17 18:16:47,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632927762] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:47,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86218590] [2024-09-17 18:16:47,269 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:16:47,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:47,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:47,271 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) [2024-09-17 18:16:47,279 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 18:16:47,319 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 18:16:47,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:47,320 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:16:47,322 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:47,476 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:47,575 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 21 proven. 6 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:47,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86218590] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:47,576 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:47,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2024-09-17 18:16:47,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686772333] [2024-09-17 18:16:47,576 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:47,576 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 18:16:47,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:47,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 18:16:47,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:16:47,577 INFO L87 Difference]: Start difference. First operand 50 states and 55 transitions. Second operand has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:47,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:47,675 INFO L93 Difference]: Finished difference Result 88 states and 103 transitions. [2024-09-17 18:16:47,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:16:47,675 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 40 [2024-09-17 18:16:47,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:47,676 INFO L225 Difference]: With dead ends: 88 [2024-09-17 18:16:47,676 INFO L226 Difference]: Without dead ends: 68 [2024-09-17 18:16:47,677 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 8 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:16:47,677 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:47,678 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 149 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:47,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-17 18:16:47,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 52. [2024-09-17 18:16:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 40 states have (on average 1.175) internal successors, (47), 41 states have internal predecessors, (47), 6 states have call successors, (6), 6 states have call predecessors, (6), 5 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:47,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 58 transitions. [2024-09-17 18:16:47,691 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 58 transitions. Word has length 40 [2024-09-17 18:16:47,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:47,691 INFO L474 AbstractCegarLoop]: Abstraction has 52 states and 58 transitions. [2024-09-17 18:16:47,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 22 states have internal predecessors, (43), 9 states have call successors, (10), 2 states have call predecessors, (10), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:16:47,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:47,692 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 58 transitions. [2024-09-17 18:16:47,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-17 18:16:47,696 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:47,696 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:47,712 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:47,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 18:16:47,897 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:47,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:47,897 INFO L85 PathProgramCache]: Analyzing trace with hash -74536894, now seen corresponding path program 6 times [2024-09-17 18:16:47,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:47,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127342299] [2024-09-17 18:16:47,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:47,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,991 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:47,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:47,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:47,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:47,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:48,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:48,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127342299] [2024-09-17 18:16:48,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127342299] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:48,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543403192] [2024-09-17 18:16:48,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:16:48,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:48,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:48,006 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) [2024-09-17 18:16:48,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 18:16:48,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-17 18:16:48,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:48,048 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:48,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:48,096 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:48,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:48,176 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 16 proven. 15 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 18:16:48,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1543403192] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:48,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:48,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-17 18:16:48,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320760689] [2024-09-17 18:16:48,177 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:48,177 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:16:48,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:48,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:16:48,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-09-17 18:16:48,180 INFO L87 Difference]: Start difference. First operand 52 states and 58 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:48,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:48,259 INFO L93 Difference]: Finished difference Result 65 states and 72 transitions. [2024-09-17 18:16:48,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 18:16:48,260 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2024-09-17 18:16:48,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:48,261 INFO L225 Difference]: With dead ends: 65 [2024-09-17 18:16:48,261 INFO L226 Difference]: Without dead ends: 63 [2024-09-17 18:16:48,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 83 SyntacticMatches, 8 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:16:48,261 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 15 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 106 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:48,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 155 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 106 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:48,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-17 18:16:48,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 59. [2024-09-17 18:16:48,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 46 states have internal predecessors, (52), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:48,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 65 transitions. [2024-09-17 18:16:48,274 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 65 transitions. Word has length 41 [2024-09-17 18:16:48,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:48,275 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 65 transitions. [2024-09-17 18:16:48,275 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 10 states have internal predecessors, (33), 5 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:16:48,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:48,275 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 65 transitions. [2024-09-17 18:16:48,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:16:48,276 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:48,276 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:48,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-17 18:16:48,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 18:16:48,477 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:48,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:48,478 INFO L85 PathProgramCache]: Analyzing trace with hash 115327702, now seen corresponding path program 7 times [2024-09-17 18:16:48,478 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:48,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821939486] [2024-09-17 18:16:48,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:48,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:48,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:48,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:48,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:48,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:48,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,636 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:48,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821939486] [2024-09-17 18:16:48,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821939486] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:48,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551492856] [2024-09-17 18:16:48,636 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:16:48,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:48,637 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:48,638 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) [2024-09-17 18:16:48,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 18:16:48,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:48,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:48,685 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:48,919 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:48,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:49,046 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:49,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551492856] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:49,046 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:49,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-17 18:16:49,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658974536] [2024-09-17 18:16:49,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:49,047 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 18:16:49,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:49,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 18:16:49,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=651, Unknown=0, NotChecked=0, Total=812 [2024-09-17 18:16:49,048 INFO L87 Difference]: Start difference. First operand 59 states and 65 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:49,175 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:49,175 INFO L93 Difference]: Finished difference Result 102 states and 119 transitions. [2024-09-17 18:16:49,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:16:49,176 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-17 18:16:49,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:49,177 INFO L225 Difference]: With dead ends: 102 [2024-09-17 18:16:49,177 INFO L226 Difference]: Without dead ends: 79 [2024-09-17 18:16:49,178 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 83 SyntacticMatches, 10 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:16:49,178 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:49,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 163 Invalid, 181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:49,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-17 18:16:49,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 60. [2024-09-17 18:16:49,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:49,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-17 18:16:49,186 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-17 18:16:49,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:49,186 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-17 18:16:49,186 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:49,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:49,187 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-17 18:16:49,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:16:49,187 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:49,187 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:49,205 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 18:16:49,391 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 18:16:49,392 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:49,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:49,393 INFO L85 PathProgramCache]: Analyzing trace with hash 73646677, now seen corresponding path program 4 times [2024-09-17 18:16:49,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:49,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695601271] [2024-09-17 18:16:49,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:49,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:49,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:49,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:49,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:49,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:49,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:49,579 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:49,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:49,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695601271] [2024-09-17 18:16:49,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695601271] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:49,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271052340] [2024-09-17 18:16:49,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:16:49,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:49,580 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:49,583 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) [2024-09-17 18:16:49,585 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 18:16:49,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:16:49,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:49,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:49,631 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:49,842 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:49,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:49,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271052340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:49,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:49,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 28 [2024-09-17 18:16:49,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517627637] [2024-09-17 18:16:49,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:49,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 18:16:49,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:49,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 18:16:49,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:16:49,972 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:50,090 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-17 18:16:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:16:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-17 18:16:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:50,092 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:16:50,092 INFO L226 Difference]: Without dead ends: 82 [2024-09-17 18:16:50,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 84 SyntacticMatches, 10 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=659, Unknown=0, NotChecked=0, Total=812 [2024-09-17 18:16:50,093 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:50,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-17 18:16:50,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-17 18:16:50,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:50,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-17 18:16:50,100 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-17 18:16:50,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:50,101 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-17 18:16:50,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:50,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:50,101 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-17 18:16:50,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:16:50,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:50,102 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:50,117 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:50,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 18:16:50,307 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:50,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:50,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1867360522, now seen corresponding path program 5 times [2024-09-17 18:16:50,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:50,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890933372] [2024-09-17 18:16:50,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:50,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:50,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:50,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 24 proven. 16 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:50,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890933372] [2024-09-17 18:16:50,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890933372] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:50,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [582686788] [2024-09-17 18:16:50,459 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:16:50,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:50,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:50,464 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) [2024-09-17 18:16:50,473 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 18:16:50,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-17 18:16:50,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:50,519 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:50,520 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:50,723 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:50,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 34 proven. 6 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:50,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [582686788] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:50,867 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:50,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 27 [2024-09-17 18:16:50,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841278584] [2024-09-17 18:16:50,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:50,868 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 18:16:50,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:50,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 18:16:50,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:16:50,869 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:50,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:50,988 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2024-09-17 18:16:50,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:16:50,989 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-17 18:16:50,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:50,990 INFO L225 Difference]: With dead ends: 106 [2024-09-17 18:16:50,990 INFO L226 Difference]: Without dead ends: 83 [2024-09-17 18:16:50,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 85 SyntacticMatches, 10 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:16:50,991 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 189 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:50,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 164 Invalid, 189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 189 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:50,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-17 18:16:50,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2024-09-17 18:16:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-17 18:16:50,999 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-17 18:16:51,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:51,000 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-17 18:16:51,000 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.8518518518518519) internal successors, (50), 27 states have internal predecessors, (50), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:51,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:51,000 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-17 18:16:51,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:16:51,001 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:51,001 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:51,018 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-17 18:16:51,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:51,202 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:51,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 702425653, now seen corresponding path program 6 times [2024-09-17 18:16:51,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:51,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782189255] [2024-09-17 18:16:51,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:51,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:51,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:51,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:51,355 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 24 proven. 17 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:51,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:51,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782189255] [2024-09-17 18:16:51,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782189255] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:51,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601933355] [2024-09-17 18:16:51,356 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:16:51,356 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:51,356 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:51,358 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) [2024-09-17 18:16:51,359 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-17 18:16:51,403 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-17 18:16:51,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:51,404 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:51,405 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:51,587 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:51,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:51,712 INFO L134 CoverageAnalysis]: Checked inductivity of 65 backedges. 34 proven. 7 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:51,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601933355] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:51,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:51,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 26 [2024-09-17 18:16:51,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680446772] [2024-09-17 18:16:51,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:51,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-17 18:16:51,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:51,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-17 18:16:51,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:16:51,714 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:51,842 INFO L93 Difference]: Finished difference Result 105 states and 122 transitions. [2024-09-17 18:16:51,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:16:51,843 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-17 18:16:51,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:51,844 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:16:51,844 INFO L226 Difference]: Without dead ends: 82 [2024-09-17 18:16:51,844 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 86 SyntacticMatches, 10 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=569, Unknown=0, NotChecked=0, Total=702 [2024-09-17 18:16:51,845 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:51,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 221 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:51,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-17 18:16:51,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 60. [2024-09-17 18:16:51,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 47 states have internal predecessors, (53), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:51,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 66 transitions. [2024-09-17 18:16:51,853 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 66 transitions. Word has length 48 [2024-09-17 18:16:51,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:51,853 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 66 transitions. [2024-09-17 18:16:51,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8846153846153846) internal successors, (49), 26 states have internal predecessors, (49), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:51,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:51,854 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 66 transitions. [2024-09-17 18:16:51,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-17 18:16:51,854 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:51,855 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:51,872 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-17 18:16:52,055 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-17 18:16:52,056 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:52,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash 1616605974, now seen corresponding path program 4 times [2024-09-17 18:16:52,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:52,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827884478] [2024-09-17 18:16:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:52,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:52,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-17 18:16:52,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:16:52,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:16:52,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:16:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:52,219 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 24 proven. 20 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:52,219 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:52,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827884478] [2024-09-17 18:16:52,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827884478] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:52,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751926372] [2024-09-17 18:16:52,220 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:16:52,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:52,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:52,225 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) [2024-09-17 18:16:52,227 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-17 18:16:52,267 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:16:52,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:52,268 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 18:16:52,269 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:52,466 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:52,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:52,588 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 34 proven. 10 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:52,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751926372] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:52,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:52,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2024-09-17 18:16:52,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090914342] [2024-09-17 18:16:52,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:52,589 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 18:16:52,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:52,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 18:16:52,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=479, Unknown=0, NotChecked=0, Total=600 [2024-09-17 18:16:52,590 INFO L87 Difference]: Start difference. First operand 60 states and 66 transitions. Second operand has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:52,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:52,702 INFO L93 Difference]: Finished difference Result 105 states and 123 transitions. [2024-09-17 18:16:52,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:16:52,703 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 48 [2024-09-17 18:16:52,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:52,704 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:16:52,704 INFO L226 Difference]: Without dead ends: 82 [2024-09-17 18:16:52,705 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 87 SyntacticMatches, 10 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=521, Unknown=0, NotChecked=0, Total=650 [2024-09-17 18:16:52,705 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 155 mSDsCounter, 0 mSdLazyCounter, 180 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:52,706 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 176 Invalid, 180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 180 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:52,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2024-09-17 18:16:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2024-09-17 18:16:52,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.1666666666666667) internal successors, (56), 49 states have internal predecessors, (56), 7 states have call successors, (7), 7 states have call predecessors, (7), 6 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:16:52,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 69 transitions. [2024-09-17 18:16:52,714 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 69 transitions. Word has length 48 [2024-09-17 18:16:52,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:52,714 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 69 transitions. [2024-09-17 18:16:52,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.92) internal successors, (48), 25 states have internal predecessors, (48), 11 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:16:52,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:52,715 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 69 transitions. [2024-09-17 18:16:52,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 18:16:52,715 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:52,715 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:52,732 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:52,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:52,916 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:52,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:52,916 INFO L85 PathProgramCache]: Analyzing trace with hash -972518079, now seen corresponding path program 8 times [2024-09-17 18:16:52,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:52,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182358023] [2024-09-17 18:16:52,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:52,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:52,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:53,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:53,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:53,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:53,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 18 proven. 31 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:53,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182358023] [2024-09-17 18:16:53,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182358023] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:53,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772565458] [2024-09-17 18:16:53,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:53,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:53,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:53,034 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) [2024-09-17 18:16:53,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-17 18:16:53,079 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:53,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:53,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-17 18:16:53,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:53,130 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:53,130 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:53,227 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 23 proven. 26 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-17 18:16:53,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772565458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:53,227 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:53,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 13 [2024-09-17 18:16:53,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517896104] [2024-09-17 18:16:53,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:53,228 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 18:16:53,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:53,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 18:16:53,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-17 18:16:53,229 INFO L87 Difference]: Start difference. First operand 62 states and 69 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:53,300 INFO L93 Difference]: Finished difference Result 75 states and 83 transitions. [2024-09-17 18:16:53,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 18:16:53,300 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Word has length 49 [2024-09-17 18:16:53,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:53,301 INFO L225 Difference]: With dead ends: 75 [2024-09-17 18:16:53,301 INFO L226 Difference]: Without dead ends: 73 [2024-09-17 18:16:53,302 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:16:53,302 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 17 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 107 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:53,302 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 127 Invalid, 107 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2024-09-17 18:16:53,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 69. [2024-09-17 18:16:53,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 53 states have (on average 1.150943396226415) internal successors, (61), 54 states have internal predecessors, (61), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:53,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 76 transitions. [2024-09-17 18:16:53,314 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 76 transitions. Word has length 49 [2024-09-17 18:16:53,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:53,314 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 76 transitions. [2024-09-17 18:16:53,314 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 11 states have internal predecessors, (36), 6 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-17 18:16:53,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:53,315 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 76 transitions. [2024-09-17 18:16:53,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:53,315 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:53,315 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:53,332 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:53,516 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:53,516 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:53,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:53,517 INFO L85 PathProgramCache]: Analyzing trace with hash 931729655, now seen corresponding path program 9 times [2024-09-17 18:16:53,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:53,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082263960] [2024-09-17 18:16:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:53,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:53,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:53,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:53,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:53,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,689 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:53,694 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:53,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:53,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082263960] [2024-09-17 18:16:53,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082263960] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:53,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136366849] [2024-09-17 18:16:53,695 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:16:53,695 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:53,695 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:53,698 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) [2024-09-17 18:16:53,711 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-17 18:16:53,757 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-17 18:16:53,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:53,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:53,760 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:54,077 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:54,078 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:54,252 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:54,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1136366849] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:54,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:54,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-17 18:16:54,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1822683711] [2024-09-17 18:16:54,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:54,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 18:16:54,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:54,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 18:16:54,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=849, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:16:54,254 INFO L87 Difference]: Start difference. First operand 69 states and 76 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:54,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:54,434 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2024-09-17 18:16:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:54,435 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:54,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:54,436 INFO L225 Difference]: With dead ends: 119 [2024-09-17 18:16:54,436 INFO L226 Difference]: Without dead ends: 93 [2024-09-17 18:16:54,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 97 SyntacticMatches, 12 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=215, Invalid=907, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:16:54,437 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 285 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:54,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 248 Invalid, 285 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-17 18:16:54,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 70. [2024-09-17 18:16:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:54,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-17 18:16:54,452 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-17 18:16:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:54,452 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-17 18:16:54,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:54,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-17 18:16:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:54,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:54,453 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:54,469 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:54,657 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-17 18:16:54,658 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:54,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1164893834, now seen corresponding path program 7 times [2024-09-17 18:16:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461268070] [2024-09-17 18:16:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:54,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:54,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:54,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,826 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:54,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:54,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:54,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:54,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,836 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:54,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:54,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461268070] [2024-09-17 18:16:54,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461268070] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:54,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112244604] [2024-09-17 18:16:54,837 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:16:54,837 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:54,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:54,839 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) [2024-09-17 18:16:54,840 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-17 18:16:54,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:54,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:54,883 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:55,139 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:55,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:55,290 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:55,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112244604] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:55,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:55,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 32 [2024-09-17 18:16:55,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886406474] [2024-09-17 18:16:55,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:55,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 18:16:55,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:55,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 18:16:55,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=804, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:16:55,293 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:55,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:55,437 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-17 18:16:55,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:55,438 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:55,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:55,439 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:16:55,439 INFO L226 Difference]: Without dead ends: 97 [2024-09-17 18:16:55,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 98 SyntacticMatches, 12 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:16:55,440 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:55,440 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 212 Invalid, 241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:55,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-17 18:16:55,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-17 18:16:55,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:55,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-17 18:16:55,451 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-17 18:16:55,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:55,451 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-17 18:16:55,452 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:55,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:55,452 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-17 18:16:55,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:55,453 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:55,453 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:55,472 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:55,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:55,657 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:55,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:55,658 INFO L85 PathProgramCache]: Analyzing trace with hash -401242857, now seen corresponding path program 8 times [2024-09-17 18:16:55,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:55,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962019301] [2024-09-17 18:16:55,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:55,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:55,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:55,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:55,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:55,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:55,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:55,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:55,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:55,878 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:55,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:55,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962019301] [2024-09-17 18:16:55,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962019301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:55,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91965741] [2024-09-17 18:16:55,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:16:55,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:55,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:55,884 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) [2024-09-17 18:16:55,885 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-17 18:16:55,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:16:55,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:55,932 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:55,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:56,184 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:56,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:56,332 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:56,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91965741] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:56,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:56,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 31 [2024-09-17 18:16:56,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824185100] [2024-09-17 18:16:56,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:56,334 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-17 18:16:56,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:56,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-17 18:16:56,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=757, Unknown=0, NotChecked=0, Total=930 [2024-09-17 18:16:56,335 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:56,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:56,488 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-17 18:16:56,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:56,488 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:56,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:56,489 INFO L225 Difference]: With dead ends: 125 [2024-09-17 18:16:56,489 INFO L226 Difference]: Without dead ends: 99 [2024-09-17 18:16:56,490 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 99 SyntacticMatches, 12 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 584 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=181, Invalid=811, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:16:56,490 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:56,490 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:56,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-17 18:16:56,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-17 18:16:56,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:56,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-17 18:16:56,500 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-17 18:16:56,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:56,500 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-17 18:16:56,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 31 states have internal predecessors, (56), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:56,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:56,501 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-17 18:16:56,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:56,501 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:56,501 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:56,516 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-17 18:16:56,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-17 18:16:56,706 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:56,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:56,706 INFO L85 PathProgramCache]: Analyzing trace with hash 177580374, now seen corresponding path program 9 times [2024-09-17 18:16:56,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:56,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239015221] [2024-09-17 18:16:56,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:56,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:56,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:56,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:56,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:56,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:56,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 37 proven. 22 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:56,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:56,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239015221] [2024-09-17 18:16:56,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239015221] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:56,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1968811684] [2024-09-17 18:16:56,883 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:16:56,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:56,883 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:56,888 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) [2024-09-17 18:16:56,892 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-17 18:16:56,937 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-17 18:16:56,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:56,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:56,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:57,169 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:57,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 99 backedges. 50 proven. 9 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:57,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1968811684] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:57,319 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:57,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 30 [2024-09-17 18:16:57,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476827843] [2024-09-17 18:16:57,319 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:57,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-17 18:16:57,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:57,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-17 18:16:57,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:16:57,321 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:57,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:57,459 INFO L93 Difference]: Finished difference Result 125 states and 145 transitions. [2024-09-17 18:16:57,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:57,460 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:57,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:57,461 INFO L225 Difference]: With dead ends: 125 [2024-09-17 18:16:57,461 INFO L226 Difference]: Without dead ends: 99 [2024-09-17 18:16:57,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 100 SyntacticMatches, 12 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2024-09-17 18:16:57,462 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 185 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:57,462 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 210 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:57,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-17 18:16:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 70. [2024-09-17 18:16:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:57,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-17 18:16:57,499 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-17 18:16:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:57,500 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-17 18:16:57,500 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8333333333333333) internal successors, (55), 30 states have internal predecessors, (55), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:57,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-17 18:16:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:57,501 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:57,501 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:57,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-17 18:16:57,705 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-17 18:16:57,706 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:57,706 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:57,706 INFO L85 PathProgramCache]: Analyzing trace with hash 57704759, now seen corresponding path program 10 times [2024-09-17 18:16:57,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:57,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182418681] [2024-09-17 18:16:57,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:57,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:57,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:57,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:57,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:57,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:57,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:57,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:57,876 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 37 proven. 24 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:57,877 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:57,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182418681] [2024-09-17 18:16:57,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182418681] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:57,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626216545] [2024-09-17 18:16:57,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:16:57,877 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:57,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:57,880 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) [2024-09-17 18:16:57,884 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-17 18:16:57,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:16:57,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:57,927 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:57,928 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:58,152 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:58,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:58,296 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 50 proven. 11 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:58,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626216545] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:58,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:58,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 29 [2024-09-17 18:16:58,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480645319] [2024-09-17 18:16:58,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:58,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 18:16:58,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:58,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 18:16:58,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=657, Unknown=0, NotChecked=0, Total=812 [2024-09-17 18:16:58,299 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:58,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:58,447 INFO L93 Difference]: Finished difference Result 123 states and 143 transitions. [2024-09-17 18:16:58,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:58,448 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:58,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:58,449 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:16:58,449 INFO L226 Difference]: Without dead ends: 97 [2024-09-17 18:16:58,450 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 101 SyntacticMatches, 12 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2024-09-17 18:16:58,450 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:58,450 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 219 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:58,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-17 18:16:58,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 70. [2024-09-17 18:16:58,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 54 states have (on average 1.1481481481481481) internal successors, (62), 55 states have internal predecessors, (62), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:58,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 77 transitions. [2024-09-17 18:16:58,462 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 77 transitions. Word has length 56 [2024-09-17 18:16:58,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:58,462 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 77 transitions. [2024-09-17 18:16:58,462 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 29 states have internal predecessors, (54), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:58,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:58,463 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 77 transitions. [2024-09-17 18:16:58,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-17 18:16:58,463 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:58,463 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:58,479 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:58,667 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-17 18:16:58,668 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:58,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:58,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1747277514, now seen corresponding path program 5 times [2024-09-17 18:16:58,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:58,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323933698] [2024-09-17 18:16:58,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:58,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:58,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:58,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,824 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-17 18:16:58,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:16:58,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:16:58,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:16:58,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:16:58,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:58,840 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 37 proven. 28 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:58,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323933698] [2024-09-17 18:16:58,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323933698] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:58,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702580858] [2024-09-17 18:16:58,841 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:16:58,841 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:58,841 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:58,843 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) [2024-09-17 18:16:58,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-17 18:16:58,888 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 18:16:58,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:58,890 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 18:16:58,891 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:59,098 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:59,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:59,273 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 50 proven. 15 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:59,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702580858] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:59,273 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:59,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2024-09-17 18:16:59,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853727606] [2024-09-17 18:16:59,273 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:59,275 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-17 18:16:59,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:59,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-17 18:16:59,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=604, Unknown=0, NotChecked=0, Total=756 [2024-09-17 18:16:59,276 INFO L87 Difference]: Start difference. First operand 70 states and 77 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:59,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:16:59,413 INFO L93 Difference]: Finished difference Result 122 states and 143 transitions. [2024-09-17 18:16:59,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:16:59,414 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 56 [2024-09-17 18:16:59,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:16:59,415 INFO L225 Difference]: With dead ends: 122 [2024-09-17 18:16:59,415 INFO L226 Difference]: Without dead ends: 96 [2024-09-17 18:16:59,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 102 SyntacticMatches, 12 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2024-09-17 18:16:59,416 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:16:59,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 189 Invalid, 220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:16:59,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-17 18:16:59,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 72. [2024-09-17 18:16:59,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 56 states have (on average 1.1607142857142858) internal successors, (65), 57 states have internal predecessors, (65), 8 states have call successors, (8), 8 states have call predecessors, (8), 7 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:16:59,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2024-09-17 18:16:59,428 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 56 [2024-09-17 18:16:59,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:16:59,428 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2024-09-17 18:16:59,428 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 28 states have internal predecessors, (53), 13 states have call successors, (14), 2 states have call predecessors, (14), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:16:59,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:59,429 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2024-09-17 18:16:59,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-17 18:16:59,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:16:59,429 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:16:59,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-17 18:16:59,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-17 18:16:59,634 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:16:59,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:16:59,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1189232738, now seen corresponding path program 10 times [2024-09-17 18:16:59,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:16:59,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909168454] [2024-09-17 18:16:59,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:16:59,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:16:59,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:16:59,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:16:59,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:16:59,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:16:59,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,746 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:16:59,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:16:59,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:16:59,749 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 25 proven. 46 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:59,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:16:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909168454] [2024-09-17 18:16:59,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909168454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:16:59,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624340939] [2024-09-17 18:16:59,750 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:16:59,750 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:16:59,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:16:59,752 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) [2024-09-17 18:16:59,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-17 18:16:59,795 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:16:59,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:16:59,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:16:59,797 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:16:59,848 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:59,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:16:59,949 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 31 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 18:16:59,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624340939] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:16:59,950 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:16:59,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 14 [2024-09-17 18:16:59,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11376923] [2024-09-17 18:16:59,950 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:16:59,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-17 18:16:59,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:16:59,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-17 18:16:59,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-09-17 18:16:59,952 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:17:00,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:00,042 INFO L93 Difference]: Finished difference Result 85 states and 94 transitions. [2024-09-17 18:17:00,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 18:17:00,043 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 57 [2024-09-17 18:17:00,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:00,044 INFO L225 Difference]: With dead ends: 85 [2024-09-17 18:17:00,044 INFO L226 Difference]: Without dead ends: 83 [2024-09-17 18:17:00,044 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 117 SyntacticMatches, 12 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:17:00,045 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 19 mSDsluCounter, 154 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:00,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 181 Invalid, 145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:00,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2024-09-17 18:17:00,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 79. [2024-09-17 18:17:00,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 62 states have internal predecessors, (70), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:00,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 87 transitions. [2024-09-17 18:17:00,058 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 87 transitions. Word has length 57 [2024-09-17 18:17:00,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:00,059 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 87 transitions. [2024-09-17 18:17:00,059 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 7 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-17 18:17:00,059 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:00,059 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 87 transitions. [2024-09-17 18:17:00,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:00,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:00,060 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:00,076 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:00,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:00,265 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:00,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:00,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1762212170, now seen corresponding path program 11 times [2024-09-17 18:17:00,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:00,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560750495] [2024-09-17 18:17:00,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:00,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:00,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:00,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:00,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:00,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:00,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:00,486 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:00,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:00,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560750495] [2024-09-17 18:17:00,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560750495] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:00,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414232504] [2024-09-17 18:17:00,487 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:00,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:00,487 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:00,489 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) [2024-09-17 18:17:00,490 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-17 18:17:00,539 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:17:00,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:00,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:00,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:00,903 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:00,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:01,106 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:01,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414232504] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:01,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:01,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-17 18:17:01,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738074704] [2024-09-17 18:17:01,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:01,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 18:17:01,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:01,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 18:17:01,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=259, Invalid=1073, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:17:01,109 INFO L87 Difference]: Start difference. First operand 79 states and 87 transitions. Second operand has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:01,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:01,301 INFO L93 Difference]: Finished difference Result 136 states and 159 transitions. [2024-09-17 18:17:01,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:01,302 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:01,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:01,303 INFO L225 Difference]: With dead ends: 136 [2024-09-17 18:17:01,303 INFO L226 Difference]: Without dead ends: 107 [2024-09-17 18:17:01,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 111 SyntacticMatches, 14 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=267, Invalid=1139, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:17:01,305 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:01,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 183 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:01,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-17 18:17:01,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2024-09-17 18:17:01,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:01,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:01,326 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:01,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:01,326 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:01,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7297297297297298) internal successors, (64), 37 states have internal predecessors, (64), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:01,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:01,327 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:01,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:01,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:01,328 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:01,344 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:01,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-17 18:17:01,533 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:01,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:01,534 INFO L85 PathProgramCache]: Analyzing trace with hash 1726081077, now seen corresponding path program 11 times [2024-09-17 18:17:01,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:01,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801058071] [2024-09-17 18:17:01,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:01,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:01,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:01,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:01,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:01,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:01,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:01,745 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:01,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801058071] [2024-09-17 18:17:01,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801058071] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:01,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575519631] [2024-09-17 18:17:01,745 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:01,745 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:01,746 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:01,747 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) [2024-09-17 18:17:01,749 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-17 18:17:01,793 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-17 18:17:01,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:01,794 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:01,795 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:02,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:02,291 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:02,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575519631] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:02,291 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:02,292 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 36 [2024-09-17 18:17:02,292 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962044614] [2024-09-17 18:17:02,292 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:02,292 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-17 18:17:02,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:02,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-17 18:17:02,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1023, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:17:02,294 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:02,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:02,460 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-17 18:17:02,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:02,461 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:02,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:02,462 INFO L225 Difference]: With dead ends: 141 [2024-09-17 18:17:02,462 INFO L226 Difference]: Without dead ends: 112 [2024-09-17 18:17:02,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 112 SyntacticMatches, 14 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 871 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=245, Invalid=1087, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:17:02,464 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 236 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 236 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:02,464 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 236 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:02,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-17 18:17:02,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-17 18:17:02,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:02,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:02,479 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:02,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:02,479 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:02,479 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:02,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:02,479 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:02,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:02,480 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:02,480 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:02,497 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:02,684 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-17 18:17:02,685 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:02,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:02,686 INFO L85 PathProgramCache]: Analyzing trace with hash -2040718634, now seen corresponding path program 12 times [2024-09-17 18:17:02,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:02,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402623059] [2024-09-17 18:17:02,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:02,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:02,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:02,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:02,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,954 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:02,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:02,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:02,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:02,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:02,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:02,970 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:02,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:02,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402623059] [2024-09-17 18:17:02,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402623059] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:02,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649368781] [2024-09-17 18:17:02,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:02,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:02,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:02,975 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) [2024-09-17 18:17:02,976 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-17 18:17:03,024 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 18:17:03,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:03,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:03,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:03,332 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:03,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:03,512 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:03,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649368781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:03,512 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:03,512 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 35 [2024-09-17 18:17:03,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [987207524] [2024-09-17 18:17:03,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:03,513 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-17 18:17:03,513 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:03,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-17 18:17:03,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=971, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 18:17:03,515 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:03,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:03,713 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-17 18:17:03,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:03,714 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:03,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:03,715 INFO L225 Difference]: With dead ends: 144 [2024-09-17 18:17:03,716 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 18:17:03,716 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 113 SyntacticMatches, 14 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=227, Invalid=1033, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:17:03,717 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:03,717 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 230 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:03,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 18:17:03,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-17 18:17:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:03,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:03,732 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:03,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:03,732 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:03,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7714285714285714) internal successors, (62), 35 states have internal predecessors, (62), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:03,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:03,733 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:03,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:03,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:03,733 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:03,749 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:03,937 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:03,938 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:03,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:03,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1162907669, now seen corresponding path program 13 times [2024-09-17 18:17:03,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:03,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535066714] [2024-09-17 18:17:03,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:03,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:03,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:04,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:04,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:04,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:04,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:04,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:04,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:04,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,133 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 53 proven. 28 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:04,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535066714] [2024-09-17 18:17:04,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535066714] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:04,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106756736] [2024-09-17 18:17:04,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:04,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:04,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:04,138 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) [2024-09-17 18:17:04,139 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-17 18:17:04,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:04,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:04,187 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:04,470 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:04,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:04,645 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 69 proven. 12 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:04,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106756736] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:04,645 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:04,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 34 [2024-09-17 18:17:04,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1070942849] [2024-09-17 18:17:04,646 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:04,646 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 18:17:04,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:04,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 18:17:04,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=917, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:17:04,647 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:04,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:04,864 INFO L93 Difference]: Finished difference Result 145 states and 168 transitions. [2024-09-17 18:17:04,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:04,865 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:04,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:04,866 INFO L225 Difference]: With dead ends: 145 [2024-09-17 18:17:04,866 INFO L226 Difference]: Without dead ends: 116 [2024-09-17 18:17:04,866 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 114 SyntacticMatches, 14 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 718 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=213, Invalid=977, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 18:17:04,867 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:04,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:04,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-17 18:17:04,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 80. [2024-09-17 18:17:04,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:04,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:04,882 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:04,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:04,882 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:04,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 34 states have internal predecessors, (61), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:04,883 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:04,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:04,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:04,884 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:04,899 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:05,087 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2024-09-17 18:17:05,088 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:05,088 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:05,088 INFO L85 PathProgramCache]: Analyzing trace with hash -1920338186, now seen corresponding path program 14 times [2024-09-17 18:17:05,089 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:05,089 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442630088] [2024-09-17 18:17:05,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:05,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:05,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:05,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:05,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:05,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:05,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:05,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:05,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:05,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:05,278 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 53 proven. 29 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:05,278 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:05,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442630088] [2024-09-17 18:17:05,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442630088] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:05,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878262719] [2024-09-17 18:17:05,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:05,279 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:05,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:05,280 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) [2024-09-17 18:17:05,282 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-17 18:17:05,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:05,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:05,330 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:05,332 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:05,594 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:05,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:05,768 INFO L134 CoverageAnalysis]: Checked inductivity of 142 backedges. 69 proven. 13 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:05,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [878262719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:05,768 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:05,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 33 [2024-09-17 18:17:05,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976841697] [2024-09-17 18:17:05,769 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:05,769 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 18:17:05,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:05,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 18:17:05,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=861, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:17:05,770 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:05,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:05,955 INFO L93 Difference]: Finished difference Result 144 states and 167 transitions. [2024-09-17 18:17:05,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:05,956 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:05,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:05,957 INFO L225 Difference]: With dead ends: 144 [2024-09-17 18:17:05,957 INFO L226 Difference]: Without dead ends: 115 [2024-09-17 18:17:05,958 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 115 SyntacticMatches, 14 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=203, Invalid=919, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:17:05,958 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 283 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:05,958 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 217 Invalid, 283 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-17 18:17:05,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2024-09-17 18:17:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:05,974 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:05,975 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:05,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 33 states have internal predecessors, (60), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:05,975 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:05,975 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:05,976 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:05,976 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:05,992 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:06,180 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:06,181 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:06,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:06,181 INFO L85 PathProgramCache]: Analyzing trace with hash 889696245, now seen corresponding path program 15 times [2024-09-17 18:17:06,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:06,182 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415370361] [2024-09-17 18:17:06,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:06,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:06,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:06,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,369 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:06,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:06,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:06,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:06,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,375 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:06,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 53 proven. 32 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415370361] [2024-09-17 18:17:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415370361] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112094632] [2024-09-17 18:17:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:06,379 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:06,380 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) [2024-09-17 18:17:06,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-17 18:17:06,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-17 18:17:06,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:06,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:06,427 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:06,719 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:06,719 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:06,895 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 69 proven. 16 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:06,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112094632] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:06,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:06,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 32 [2024-09-17 18:17:06,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758835418] [2024-09-17 18:17:06,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:06,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-17 18:17:06,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:06,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-17 18:17:06,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:17:06,897 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:07,089 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:07,089 INFO L93 Difference]: Finished difference Result 141 states and 164 transitions. [2024-09-17 18:17:07,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:07,090 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:07,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:07,091 INFO L225 Difference]: With dead ends: 141 [2024-09-17 18:17:07,091 INFO L226 Difference]: Without dead ends: 112 [2024-09-17 18:17:07,092 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 116 SyntacticMatches, 14 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 18:17:07,092 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 305 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:07,093 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 305 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:07,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-17 18:17:07,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2024-09-17 18:17:07,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.1451612903225807) internal successors, (71), 63 states have internal predecessors, (71), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:07,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2024-09-17 18:17:07,112 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 64 [2024-09-17 18:17:07,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:07,113 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2024-09-17 18:17:07,113 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.84375) internal successors, (59), 32 states have internal predecessors, (59), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:07,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:07,113 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2024-09-17 18:17:07,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-17 18:17:07,114 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:07,115 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:07,130 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-17 18:17:07,319 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-17 18:17:07,320 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:07,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:07,320 INFO L85 PathProgramCache]: Analyzing trace with hash 2088721174, now seen corresponding path program 6 times [2024-09-17 18:17:07,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:07,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689509939] [2024-09-17 18:17:07,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:07,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:07,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:07,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-17 18:17:07,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:17:07,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:17:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:17:07,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:17:07,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,533 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:17:07,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:07,535 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 53 proven. 37 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:07,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:07,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689509939] [2024-09-17 18:17:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689509939] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:07,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1019372465] [2024-09-17 18:17:07,536 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:07,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:07,536 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:07,538 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) [2024-09-17 18:17:07,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-17 18:17:07,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 18:17:07,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:07,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 18:17:07,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:07,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:08,008 INFO L134 CoverageAnalysis]: Checked inductivity of 150 backedges. 69 proven. 21 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:08,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1019372465] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:08,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:08,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 31 [2024-09-17 18:17:08,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826425650] [2024-09-17 18:17:08,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:08,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-17 18:17:08,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:08,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-17 18:17:08,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=743, Unknown=0, NotChecked=0, Total=930 [2024-09-17 18:17:08,011 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:08,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:08,162 INFO L93 Difference]: Finished difference Result 139 states and 163 transitions. [2024-09-17 18:17:08,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:17:08,163 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 64 [2024-09-17 18:17:08,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:08,164 INFO L225 Difference]: With dead ends: 139 [2024-09-17 18:17:08,164 INFO L226 Difference]: Without dead ends: 110 [2024-09-17 18:17:08,165 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 117 SyntacticMatches, 14 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:17:08,165 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:08,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 201 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:08,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-09-17 18:17:08,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2024-09-17 18:17:08,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 64 states have (on average 1.15625) internal successors, (74), 65 states have internal predecessors, (74), 9 states have call successors, (9), 9 states have call predecessors, (9), 8 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:08,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 91 transitions. [2024-09-17 18:17:08,182 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 91 transitions. Word has length 64 [2024-09-17 18:17:08,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:08,183 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 91 transitions. [2024-09-17 18:17:08,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 31 states have internal predecessors, (58), 15 states have call successors, (16), 2 states have call predecessors, (16), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:17:08,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:08,183 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 91 transitions. [2024-09-17 18:17:08,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2024-09-17 18:17:08,184 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:08,184 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:08,199 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:08,388 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-17 18:17:08,389 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:08,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:08,389 INFO L85 PathProgramCache]: Analyzing trace with hash -968139999, now seen corresponding path program 12 times [2024-09-17 18:17:08,389 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:08,389 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655757431] [2024-09-17 18:17:08,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:08,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:08,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:08,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:08,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,559 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:08,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:08,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 33 proven. 64 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:08,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:08,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655757431] [2024-09-17 18:17:08,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [655757431] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:08,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761714787] [2024-09-17 18:17:08,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:08,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:08,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:08,566 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) [2024-09-17 18:17:08,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-17 18:17:08,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 18:17:08,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:08,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:08,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:08,694 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:08,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 157 backedges. 40 proven. 57 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-17 18:17:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1761714787] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:08,833 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 15 [2024-09-17 18:17:08,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513944670] [2024-09-17 18:17:08,834 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:08,834 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 18:17:08,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:08,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 18:17:08,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:17:08,835 INFO L87 Difference]: Start difference. First operand 82 states and 91 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:17:09,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:09,018 INFO L93 Difference]: Finished difference Result 95 states and 105 transitions. [2024-09-17 18:17:09,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:17:09,019 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) Word has length 65 [2024-09-17 18:17:09,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:09,020 INFO L225 Difference]: With dead ends: 95 [2024-09-17 18:17:09,023 INFO L226 Difference]: Without dead ends: 93 [2024-09-17 18:17:09,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 134 SyntacticMatches, 14 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:17:09,024 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 21 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:09,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 175 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:09,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2024-09-17 18:17:09,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 89. [2024-09-17 18:17:09,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 69 states have (on average 1.144927536231884) internal successors, (79), 70 states have internal predecessors, (79), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:09,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 98 transitions. [2024-09-17 18:17:09,072 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 98 transitions. Word has length 65 [2024-09-17 18:17:09,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:09,072 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 98 transitions. [2024-09-17 18:17:09,076 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 13 states have internal predecessors, (42), 8 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:17:09,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:09,076 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 98 transitions. [2024-09-17 18:17:09,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:09,077 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:09,077 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:09,108 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:09,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-17 18:17:09,278 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:09,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:09,279 INFO L85 PathProgramCache]: Analyzing trace with hash -16980201, now seen corresponding path program 13 times [2024-09-17 18:17:09,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:09,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111612435] [2024-09-17 18:17:09,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:09,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:09,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:09,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:09,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:09,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:09,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:09,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:09,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:09,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,584 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:09,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:09,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111612435] [2024-09-17 18:17:09,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111612435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:09,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520452975] [2024-09-17 18:17:09,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:09,585 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:09,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:09,586 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) [2024-09-17 18:17:09,588 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-17 18:17:09,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:09,633 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:09,635 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:10,026 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:10,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:10,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520452975] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:10,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:10,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-17 18:17:10,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194397297] [2024-09-17 18:17:10,247 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:10,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-17 18:17:10,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:10,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-17 18:17:10,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=317, Invalid=1323, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:10,249 INFO L87 Difference]: Start difference. First operand 89 states and 98 transitions. Second operand has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:10,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:10,481 INFO L93 Difference]: Finished difference Result 153 states and 179 transitions. [2024-09-17 18:17:10,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:10,481 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:10,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:10,483 INFO L225 Difference]: With dead ends: 153 [2024-09-17 18:17:10,483 INFO L226 Difference]: Without dead ends: 121 [2024-09-17 18:17:10,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 125 SyntacticMatches, 16 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=1397, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:17:10,484 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 390 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:10,484 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 308 Invalid, 390 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:10,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-17 18:17:10,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 90. [2024-09-17 18:17:10,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:10,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:10,505 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:10,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:10,505 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:10,505 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7073170731707317) internal successors, (70), 41 states have internal predecessors, (70), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:10,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:10,505 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:10,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:10,506 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:10,506 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:10,526 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2024-09-17 18:17:10,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-17 18:17:10,709 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:10,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:10,709 INFO L85 PathProgramCache]: Analyzing trace with hash 338303382, now seen corresponding path program 16 times [2024-09-17 18:17:10,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:10,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74807400] [2024-09-17 18:17:10,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:10,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:10,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:10,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:10,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:10,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:10,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:10,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:10,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:10,962 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:10,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:10,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74807400] [2024-09-17 18:17:10,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [74807400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:10,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642371455] [2024-09-17 18:17:10,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:17:10,962 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:10,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:10,964 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) [2024-09-17 18:17:10,967 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-17 18:17:11,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:17:11,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:11,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:11,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:11,385 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:11,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:11,595 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:11,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642371455] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:11,596 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:11,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 40 [2024-09-17 18:17:11,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618021113] [2024-09-17 18:17:11,596 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:11,596 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-17 18:17:11,597 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:11,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-17 18:17:11,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=292, Invalid=1268, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:17:11,598 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:11,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:11,909 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-17 18:17:11,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:11,910 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:11,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:11,911 INFO L225 Difference]: With dead ends: 159 [2024-09-17 18:17:11,911 INFO L226 Difference]: Without dead ends: 127 [2024-09-17 18:17:11,912 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 126 SyntacticMatches, 16 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=300, Invalid=1340, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:11,916 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 249 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:11,917 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 278 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:11,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-17 18:17:11,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-17 18:17:11,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:11,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:11,939 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:11,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:11,940 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:11,940 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.725) internal successors, (69), 40 states have internal predecessors, (69), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:11,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:11,940 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:11,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:11,941 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:11,941 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:11,958 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-17 18:17:12,145 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:12,146 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:12,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:12,146 INFO L85 PathProgramCache]: Analyzing trace with hash 626858807, now seen corresponding path program 17 times [2024-09-17 18:17:12,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:12,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800219034] [2024-09-17 18:17:12,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:12,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:12,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:12,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,414 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:12,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,416 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:12,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,417 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,419 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,420 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:12,423 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:12,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:12,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800219034] [2024-09-17 18:17:12,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800219034] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:12,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294715644] [2024-09-17 18:17:12,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:12,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:12,424 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:12,426 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) [2024-09-17 18:17:12,427 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-17 18:17:12,481 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-17 18:17:12,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:12,483 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:12,484 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:12,901 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:12,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:13,108 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:13,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294715644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:13,109 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:13,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 39 [2024-09-17 18:17:13,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558644184] [2024-09-17 18:17:13,109 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:13,109 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-17 18:17:13,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:13,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-17 18:17:13,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=271, Invalid=1211, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:17:13,111 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:13,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:13,302 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-17 18:17:13,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:13,303 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:13,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:13,304 INFO L225 Difference]: With dead ends: 163 [2024-09-17 18:17:13,304 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 18:17:13,305 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 127 SyntacticMatches, 16 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1033 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=279, Invalid=1281, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:17:13,305 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:13,305 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 172 Invalid, 206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:13,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 18:17:13,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-17 18:17:13,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:13,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:13,326 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:13,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:13,327 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:13,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.7435897435897436) internal successors, (68), 39 states have internal predecessors, (68), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:13,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:13,327 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:13,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:13,328 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:13,328 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:13,343 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-17 18:17:13,531 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-17 18:17:13,532 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:13,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:13,532 INFO L85 PathProgramCache]: Analyzing trace with hash 81977718, now seen corresponding path program 18 times [2024-09-17 18:17:13,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:13,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027763934] [2024-09-17 18:17:13,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:13,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:13,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:13,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:13,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:13,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:13,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:13,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:13,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:13,761 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:13,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:13,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027763934] [2024-09-17 18:17:13,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027763934] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731768167] [2024-09-17 18:17:13,762 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:13,762 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:13,762 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:13,764 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) [2024-09-17 18:17:13,770 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-17 18:17:13,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-17 18:17:13,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:13,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:13,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:14,174 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:14,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731768167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:14,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:14,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 38 [2024-09-17 18:17:14,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839131681] [2024-09-17 18:17:14,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:14,378 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 18:17:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 18:17:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=1152, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:17:14,379 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:14,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:14,600 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-17 18:17:14,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:14,600 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:14,602 INFO L225 Difference]: With dead ends: 165 [2024-09-17 18:17:14,602 INFO L226 Difference]: Without dead ends: 133 [2024-09-17 18:17:14,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 128 SyntacticMatches, 16 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=262, Invalid=1220, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:17:14,603 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:14,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 242 Invalid, 329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:14,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-17 18:17:14,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-17 18:17:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:14,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:14,626 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:14,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:14,626 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:14,627 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.763157894736842) internal successors, (67), 38 states have internal predecessors, (67), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:14,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:14,627 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:14,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:14,628 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:14,628 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:14,643 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:14,831 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-17 18:17:14,832 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:14,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:14,832 INFO L85 PathProgramCache]: Analyzing trace with hash -1736714409, now seen corresponding path program 19 times [2024-09-17 18:17:14,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:14,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650486534] [2024-09-17 18:17:14,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:14,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:15,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:15,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:15,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:15,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,078 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 72 proven. 35 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:15,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:15,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650486534] [2024-09-17 18:17:15,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650486534] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:15,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827612539] [2024-09-17 18:17:15,078 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:15,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:15,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:15,081 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) [2024-09-17 18:17:15,083 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-17 18:17:15,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:15,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:15,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:15,458 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:15,458 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:15,666 INFO L134 CoverageAnalysis]: Checked inductivity of 191 backedges. 91 proven. 16 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:15,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827612539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:15,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:15,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 37 [2024-09-17 18:17:15,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193801746] [2024-09-17 18:17:15,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:15,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 18:17:15,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:15,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 18:17:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=1091, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:17:15,669 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:15,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:15,877 INFO L93 Difference]: Finished difference Result 165 states and 191 transitions. [2024-09-17 18:17:15,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:15,878 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:15,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:15,879 INFO L225 Difference]: With dead ends: 165 [2024-09-17 18:17:15,879 INFO L226 Difference]: Without dead ends: 133 [2024-09-17 18:17:15,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 129 SyntacticMatches, 16 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=249, Invalid=1157, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:17:15,881 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:15,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 194 Invalid, 272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:15,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-17 18:17:15,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 90. [2024-09-17 18:17:15,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:15,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:15,903 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:15,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:15,903 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:15,904 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7837837837837838) internal successors, (66), 37 states have internal predecessors, (66), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:15,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:15,904 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:15,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:15,905 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:15,905 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:15,922 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-17 18:17:16,106 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-17 18:17:16,107 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:16,107 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:16,107 INFO L85 PathProgramCache]: Analyzing trace with hash 1391206742, now seen corresponding path program 20 times [2024-09-17 18:17:16,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:16,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349701578] [2024-09-17 18:17:16,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:16,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:16,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,330 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:16,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:16,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:16,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,337 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:16,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,338 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:16,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:16,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:16,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:16,342 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 72 proven. 37 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:16,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349701578] [2024-09-17 18:17:16,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349701578] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:16,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950002829] [2024-09-17 18:17:16,343 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:16,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:16,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:16,345 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) [2024-09-17 18:17:16,346 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-17 18:17:16,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:16,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:16,392 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:16,393 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:16,706 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:16,707 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:16,908 INFO L134 CoverageAnalysis]: Checked inductivity of 193 backedges. 91 proven. 18 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:16,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950002829] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:16,908 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:16,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 36 [2024-09-17 18:17:16,909 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261965389] [2024-09-17 18:17:16,909 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:16,909 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-17 18:17:16,909 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:16,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-17 18:17:16,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=232, Invalid=1028, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:17:16,911 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:17,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:17,147 INFO L93 Difference]: Finished difference Result 163 states and 189 transitions. [2024-09-17 18:17:17,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:17,147 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:17,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:17,149 INFO L225 Difference]: With dead ends: 163 [2024-09-17 18:17:17,149 INFO L226 Difference]: Without dead ends: 131 [2024-09-17 18:17:17,149 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 130 SyntacticMatches, 16 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 784 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=240, Invalid=1092, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:17:17,150 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 293 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:17,150 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 262 Invalid, 293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 293 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:17,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-17 18:17:17,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 90. [2024-09-17 18:17:17,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:17,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:17,174 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:17,174 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:17,174 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:17,174 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8055555555555556) internal successors, (65), 36 states have internal predecessors, (65), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:17,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:17,175 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:17,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:17,175 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:17,175 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:17,195 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:17,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2024-09-17 18:17:17,380 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 106634103, now seen corresponding path program 21 times [2024-09-17 18:17:17,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:17,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662911535] [2024-09-17 18:17:17,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:17,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:17,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:17,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:17,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,606 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:17,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:17,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,609 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:17,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:17,612 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 72 proven. 41 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:17,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662911535] [2024-09-17 18:17:17,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662911535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:17,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145280220] [2024-09-17 18:17:17,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:17,612 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:17,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:17,614 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) [2024-09-17 18:17:17,616 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-17 18:17:17,667 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-17 18:17:17,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:17,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:17,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:17,979 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:17,979 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:18,197 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 91 proven. 22 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:18,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145280220] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:18,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:18,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2024-09-17 18:17:18,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [817266975] [2024-09-17 18:17:18,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:18,199 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-17 18:17:18,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:18,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-17 18:17:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=963, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 18:17:18,200 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:18,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:18,411 INFO L93 Difference]: Finished difference Result 159 states and 185 transitions. [2024-09-17 18:17:18,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:18,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:18,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:18,414 INFO L225 Difference]: With dead ends: 159 [2024-09-17 18:17:18,414 INFO L226 Difference]: Without dead ends: 127 [2024-09-17 18:17:18,414 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 16 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2024-09-17 18:17:18,415 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:18,415 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 234 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:18,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-09-17 18:17:18,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 90. [2024-09-17 18:17:18,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 71 states have internal predecessors, (80), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:18,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 99 transitions. [2024-09-17 18:17:18,440 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 99 transitions. Word has length 72 [2024-09-17 18:17:18,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:18,440 INFO L474 AbstractCegarLoop]: Abstraction has 90 states and 99 transitions. [2024-09-17 18:17:18,441 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.8285714285714285) internal successors, (64), 35 states have internal predecessors, (64), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:18,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:18,441 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 99 transitions. [2024-09-17 18:17:18,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2024-09-17 18:17:18,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:18,442 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:18,458 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-17 18:17:18,642 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:18,643 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:18,643 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:18,643 INFO L85 PathProgramCache]: Analyzing trace with hash -2013013706, now seen corresponding path program 7 times [2024-09-17 18:17:18,643 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:18,643 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893895806] [2024-09-17 18:17:18,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:18,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:18,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:18,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-17 18:17:18,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:17:18,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:17:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:17:18,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:17:18,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:17:18,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:17:18,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,890 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 72 proven. 47 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:18,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:18,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893895806] [2024-09-17 18:17:18,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893895806] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:18,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435740214] [2024-09-17 18:17:18,891 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:18,891 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:18,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:18,894 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) [2024-09-17 18:17:18,895 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-17 18:17:18,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:18,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 18:17:18,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:19,228 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:19,229 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:19,427 INFO L134 CoverageAnalysis]: Checked inductivity of 203 backedges. 91 proven. 28 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:19,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435740214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:19,427 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:19,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2024-09-17 18:17:19,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999137923] [2024-09-17 18:17:19,428 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:19,428 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-17 18:17:19,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:19,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-17 18:17:19,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=896, Unknown=0, NotChecked=0, Total=1122 [2024-09-17 18:17:19,429 INFO L87 Difference]: Start difference. First operand 90 states and 99 transitions. Second operand has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:19,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:19,640 INFO L93 Difference]: Finished difference Result 156 states and 183 transitions. [2024-09-17 18:17:19,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:17:19,640 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) Word has length 72 [2024-09-17 18:17:19,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:19,642 INFO L225 Difference]: With dead ends: 156 [2024-09-17 18:17:19,642 INFO L226 Difference]: Without dead ends: 124 [2024-09-17 18:17:19,642 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 16 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 627 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=234, Invalid=956, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 18:17:19,643 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 313 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 313 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:19,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 295 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 313 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:19,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-17 18:17:19,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 92. [2024-09-17 18:17:19,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 72 states have (on average 1.1527777777777777) internal successors, (83), 73 states have internal predecessors, (83), 10 states have call successors, (10), 10 states have call predecessors, (10), 9 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:19,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 102 transitions. [2024-09-17 18:17:19,667 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 102 transitions. Word has length 72 [2024-09-17 18:17:19,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:19,667 INFO L474 AbstractCegarLoop]: Abstraction has 92 states and 102 transitions. [2024-09-17 18:17:19,668 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.8529411764705883) internal successors, (63), 34 states have internal predecessors, (63), 17 states have call successors, (18), 2 states have call predecessors, (18), 1 states have return successors, (16), 16 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:17:19,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:19,668 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 102 transitions. [2024-09-17 18:17:19,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 18:17:19,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:19,669 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:19,685 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-17 18:17:19,872 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:19,873 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:19,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:19,873 INFO L85 PathProgramCache]: Analyzing trace with hash 588767362, now seen corresponding path program 14 times [2024-09-17 18:17:19,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:19,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454179435] [2024-09-17 18:17:19,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:19,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:20,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:20,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:20,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:20,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:20,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,019 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:20,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:20,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,025 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 42 proven. 85 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:20,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454179435] [2024-09-17 18:17:20,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454179435] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:20,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108302893] [2024-09-17 18:17:20,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:20,026 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:20,026 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:20,027 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) [2024-09-17 18:17:20,031 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-17 18:17:20,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:20,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:20,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-17 18:17:20,078 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:20,135 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:20,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:20,281 INFO L134 CoverageAnalysis]: Checked inductivity of 211 backedges. 50 proven. 77 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-17 18:17:20,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108302893] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:20,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:20,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 16 [2024-09-17 18:17:20,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039861386] [2024-09-17 18:17:20,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:20,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:17:20,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:20,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:17:20,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:17:20,283 INFO L87 Difference]: Start difference. First operand 92 states and 102 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:20,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:20,401 INFO L93 Difference]: Finished difference Result 105 states and 116 transitions. [2024-09-17 18:17:20,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:17:20,402 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) Word has length 73 [2024-09-17 18:17:20,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:20,403 INFO L225 Difference]: With dead ends: 105 [2024-09-17 18:17:20,403 INFO L226 Difference]: Without dead ends: 103 [2024-09-17 18:17:20,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 18 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:17:20,404 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 20 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 175 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:20,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 207 Invalid, 175 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:20,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-17 18:17:20,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 99. [2024-09-17 18:17:20,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 78 states have internal predecessors, (88), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:20,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 109 transitions. [2024-09-17 18:17:20,429 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 109 transitions. Word has length 73 [2024-09-17 18:17:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:20,429 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 109 transitions. [2024-09-17 18:17:20,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 14 states have internal predecessors, (45), 9 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (8), 8 states have call predecessors, (8), 8 states have call successors, (8) [2024-09-17 18:17:20,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 109 transitions. [2024-09-17 18:17:20,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:20,430 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:20,430 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:20,446 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:20,632 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-17 18:17:20,632 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:20,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:20,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1028833942, now seen corresponding path program 15 times [2024-09-17 18:17:20,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:20,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297936982] [2024-09-17 18:17:20,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:20,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:20,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:20,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:20,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:20,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:20,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:20,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:20,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:20,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:20,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:20,914 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:20,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297936982] [2024-09-17 18:17:20,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297936982] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:20,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059977056] [2024-09-17 18:17:20,915 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:20,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:20,915 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:20,916 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) [2024-09-17 18:17:20,918 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-17 18:17:20,966 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-17 18:17:20,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:20,968 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:20,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:21,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:21,683 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:21,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059977056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:21,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:21,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-17 18:17:21,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197350423] [2024-09-17 18:17:21,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:21,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-17 18:17:21,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:21,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-17 18:17:21,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=381, Invalid=1599, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:17:21,686 INFO L87 Difference]: Start difference. First operand 99 states and 109 transitions. Second operand has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:21,944 INFO L93 Difference]: Finished difference Result 170 states and 199 transitions. [2024-09-17 18:17:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:21,945 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:21,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:21,946 INFO L225 Difference]: With dead ends: 170 [2024-09-17 18:17:21,946 INFO L226 Difference]: Without dead ends: 135 [2024-09-17 18:17:21,947 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 139 SyntacticMatches, 18 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=389, Invalid=1681, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:17:21,947 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 231 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:21,947 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 260 Invalid, 398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:21,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2024-09-17 18:17:21,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 100. [2024-09-17 18:17:21,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:21,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:21,976 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:21,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:21,977 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:21,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6888888888888889) internal successors, (76), 45 states have internal predecessors, (76), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:21,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:21,977 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:21,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:21,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:21,978 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:21,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-09-17 18:17:22,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-17 18:17:22,182 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:22,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:22,183 INFO L85 PathProgramCache]: Analyzing trace with hash -1054800363, now seen corresponding path program 22 times [2024-09-17 18:17:22,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:22,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666084618] [2024-09-17 18:17:22,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:22,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:22,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:22,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:22,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:22,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:22,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:22,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:22,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:22,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:22,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:22,452 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:22,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666084618] [2024-09-17 18:17:22,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666084618] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:22,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293096068] [2024-09-17 18:17:22,453 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:17:22,453 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:22,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:22,455 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) [2024-09-17 18:17:22,457 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-17 18:17:22,508 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:17:22,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:22,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:22,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:22,976 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:22,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:23,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [293096068] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:23,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:23,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2024-09-17 18:17:23,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708849033] [2024-09-17 18:17:23,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:23,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-17 18:17:23,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:23,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-17 18:17:23,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=1539, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:17:23,224 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:23,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:23,466 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-17 18:17:23,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:23,466 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:23,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:23,468 INFO L225 Difference]: With dead ends: 177 [2024-09-17 18:17:23,468 INFO L226 Difference]: Without dead ends: 142 [2024-09-17 18:17:23,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 140 SyntacticMatches, 18 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1404 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=361, Invalid=1619, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:17:23,469 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:23,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 258 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:23,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-17 18:17:23,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-17 18:17:23,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:23,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:23,502 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:23,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:23,502 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:23,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7045454545454546) internal successors, (75), 44 states have internal predecessors, (75), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:23,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:23,503 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:23,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:23,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:23,504 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:23,521 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-17 18:17:23,707 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:23,708 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:23,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:23,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1926026934, now seen corresponding path program 23 times [2024-09-17 18:17:23,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:23,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490650894] [2024-09-17 18:17:23,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:23,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:23,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:23,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:23,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,967 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:23,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:23,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:23,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:23,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:23,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:23,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:23,975 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:23,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490650894] [2024-09-17 18:17:23,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490650894] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:23,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758931745] [2024-09-17 18:17:23,976 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:23,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:23,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:23,978 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) [2024-09-17 18:17:23,979 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-17 18:17:24,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-17 18:17:24,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:24,033 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:24,034 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:24,564 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:24,566 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:24,819 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:24,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758931745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:24,820 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:24,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2024-09-17 18:17:24,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706748994] [2024-09-17 18:17:24,820 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:24,820 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-17 18:17:24,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:24,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-17 18:17:24,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=1477, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 18:17:24,821 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:25,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:25,148 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-17 18:17:25,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:25,148 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:25,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:25,150 INFO L225 Difference]: With dead ends: 182 [2024-09-17 18:17:25,150 INFO L226 Difference]: Without dead ends: 147 [2024-09-17 18:17:25,150 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 141 SyntacticMatches, 18 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1304 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:17:25,151 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 316 mSDsCounter, 0 mSdLazyCounter, 433 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 433 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:25,151 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 347 Invalid, 433 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 433 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-17 18:17:25,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-17 18:17:25,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:25,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:25,219 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:25,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:25,219 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:25,219 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 43 states have internal predecessors, (74), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:25,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:25,220 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:25,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:25,220 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:25,220 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:25,243 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:25,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:25,421 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:25,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:25,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1745087989, now seen corresponding path program 24 times [2024-09-17 18:17:25,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:25,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047251662] [2024-09-17 18:17:25,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:25,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:25,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:25,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:25,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:25,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:25,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:25,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:25,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:25,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:25,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:25,905 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:25,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:25,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047251662] [2024-09-17 18:17:25,909 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047251662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:25,909 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933141565] [2024-09-17 18:17:25,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:25,909 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:25,910 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:25,911 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) [2024-09-17 18:17:25,915 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-17 18:17:26,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-17 18:17:26,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:26,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:26,019 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:26,499 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:26,500 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:26,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933141565] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:26,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:26,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 42 [2024-09-17 18:17:26,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124841194] [2024-09-17 18:17:26,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:26,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-17 18:17:26,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:26,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-17 18:17:26,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=309, Invalid=1413, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:17:26,739 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:27,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:27,111 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-17 18:17:27,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:27,112 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:27,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:27,113 INFO L225 Difference]: With dead ends: 185 [2024-09-17 18:17:27,114 INFO L226 Difference]: Without dead ends: 150 [2024-09-17 18:17:27,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 142 SyntacticMatches, 18 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1207 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=317, Invalid=1489, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 18:17:27,115 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:27,115 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 310 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:17:27,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-17 18:17:27,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-17 18:17:27,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:27,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:27,150 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:27,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:27,150 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:27,150 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7380952380952381) internal successors, (73), 42 states have internal predecessors, (73), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:27,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:27,151 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:27,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:27,151 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:27,151 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:27,167 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:27,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-17 18:17:27,352 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:27,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:27,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1308790058, now seen corresponding path program 25 times [2024-09-17 18:17:27,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:27,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987149107] [2024-09-17 18:17:27,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:27,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:27,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:27,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:27,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:27,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:27,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:27,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:27,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,634 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 94 proven. 42 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:27,635 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:27,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987149107] [2024-09-17 18:17:27,635 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987149107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:27,635 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140894087] [2024-09-17 18:17:27,635 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:27,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:27,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:27,638 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) [2024-09-17 18:17:27,640 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-17 18:17:27,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:27,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:27,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:28,054 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:28,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:28,254 INFO L134 CoverageAnalysis]: Checked inductivity of 248 backedges. 116 proven. 20 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:28,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140894087] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:28,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:28,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 41 [2024-09-17 18:17:28,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37579521] [2024-09-17 18:17:28,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:28,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-17 18:17:28,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:28,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-17 18:17:28,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=1347, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:28,257 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:28,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:28,622 INFO L93 Difference]: Finished difference Result 186 states and 215 transitions. [2024-09-17 18:17:28,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:28,623 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:28,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:28,627 INFO L225 Difference]: With dead ends: 186 [2024-09-17 18:17:28,627 INFO L226 Difference]: Without dead ends: 151 [2024-09-17 18:17:28,628 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 143 SyntacticMatches, 18 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=301, Invalid=1421, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:17:28,629 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 435 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 435 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:28,629 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 435 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:28,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-17 18:17:28,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2024-09-17 18:17:28,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:28,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:28,666 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:28,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:28,667 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:28,667 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.7560975609756098) internal successors, (72), 41 states have internal predecessors, (72), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:28,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:28,667 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:28,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:28,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:28,668 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:28,683 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2024-09-17 18:17:28,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-17 18:17:28,869 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:28,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:28,869 INFO L85 PathProgramCache]: Analyzing trace with hash 809455061, now seen corresponding path program 26 times [2024-09-17 18:17:28,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:28,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136801078] [2024-09-17 18:17:28,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:28,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:28,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:29,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:29,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:29,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:29,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:29,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:29,139 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 94 proven. 43 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:29,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136801078] [2024-09-17 18:17:29,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136801078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:29,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900215628] [2024-09-17 18:17:29,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:29,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:29,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:29,141 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:29,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-17 18:17:29,190 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:29,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:29,191 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:29,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:29,551 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:29,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:29,783 INFO L134 CoverageAnalysis]: Checked inductivity of 249 backedges. 116 proven. 21 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:29,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900215628] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:29,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:29,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 40 [2024-09-17 18:17:29,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010304564] [2024-09-17 18:17:29,784 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:29,784 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-17 18:17:29,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:29,785 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-17 18:17:29,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:17:29,785 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:30,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:30,087 INFO L93 Difference]: Finished difference Result 185 states and 214 transitions. [2024-09-17 18:17:30,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:30,087 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:30,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:30,089 INFO L225 Difference]: With dead ends: 185 [2024-09-17 18:17:30,089 INFO L226 Difference]: Without dead ends: 150 [2024-09-17 18:17:30,089 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 144 SyntacticMatches, 18 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1022 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=1351, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:30,090 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:30,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 229 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:30,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2024-09-17 18:17:30,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 100. [2024-09-17 18:17:30,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:30,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:30,123 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:30,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:30,124 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:30,124 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.775) internal successors, (71), 40 states have internal predecessors, (71), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:30,124 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:30,124 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:30,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:30,125 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:30,125 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:30,142 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2024-09-17 18:17:30,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-17 18:17:30,326 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:30,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:30,327 INFO L85 PathProgramCache]: Analyzing trace with hash -2031708426, now seen corresponding path program 27 times [2024-09-17 18:17:30,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:30,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393103244] [2024-09-17 18:17:30,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:30,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:30,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:30,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:30,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:30,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:30,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:30,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:30,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:30,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:30,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:30,608 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 94 proven. 46 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:30,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:30,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393103244] [2024-09-17 18:17:30,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393103244] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:30,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1021847638] [2024-09-17 18:17:30,613 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:30,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:30,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:30,615 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:30,620 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-17 18:17:30,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-17 18:17:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:30,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:30,687 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:31,054 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:31,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:31,284 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 116 proven. 24 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:31,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1021847638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:31,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:31,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 39 [2024-09-17 18:17:31,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871602433] [2024-09-17 18:17:31,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:31,285 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-17 18:17:31,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:31,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-17 18:17:31,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=1209, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:17:31,286 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:31,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:31,549 INFO L93 Difference]: Finished difference Result 182 states and 211 transitions. [2024-09-17 18:17:31,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:31,550 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:31,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:31,551 INFO L225 Difference]: With dead ends: 182 [2024-09-17 18:17:31,551 INFO L226 Difference]: Without dead ends: 147 [2024-09-17 18:17:31,552 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 145 SyntacticMatches, 18 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=281, Invalid=1279, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:17:31,552 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 339 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 339 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 339 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:31,553 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 264 Invalid, 339 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 339 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:31,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-09-17 18:17:31,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 100. [2024-09-17 18:17:31,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:31,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:31,587 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:31,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:31,587 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:31,588 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.794871794871795) internal successors, (70), 39 states have internal predecessors, (70), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:31,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:31,588 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:31,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:31,588 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:31,589 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:31,605 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-17 18:17:31,789 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2024-09-17 18:17:31,789 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:31,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:31,790 INFO L85 PathProgramCache]: Analyzing trace with hash 93398453, now seen corresponding path program 28 times [2024-09-17 18:17:31,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:31,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016089508] [2024-09-17 18:17:31,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:31,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:31,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:32,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:32,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:32,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:32,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:32,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:32,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:32,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:32,042 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 94 proven. 51 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:32,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016089508] [2024-09-17 18:17:32,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2016089508] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:32,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904534708] [2024-09-17 18:17:32,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:17:32,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:32,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:32,044 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:32,046 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-17 18:17:32,094 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:17:32,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:32,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:32,098 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:32,748 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:32,952 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 116 proven. 29 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:32,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1904534708] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:32,952 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:32,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 38 [2024-09-17 18:17:32,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618097830] [2024-09-17 18:17:32,953 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:32,954 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 18:17:32,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:32,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 18:17:32,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1137, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:17:32,961 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:33,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:33,292 INFO L93 Difference]: Finished difference Result 177 states and 206 transitions. [2024-09-17 18:17:33,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:33,293 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:33,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:33,294 INFO L225 Difference]: With dead ends: 177 [2024-09-17 18:17:33,294 INFO L226 Difference]: Without dead ends: 142 [2024-09-17 18:17:33,295 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 146 SyntacticMatches, 18 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 849 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=277, Invalid=1205, Unknown=0, NotChecked=0, Total=1482 [2024-09-17 18:17:33,296 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 255 mSDsCounter, 0 mSdLazyCounter, 360 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 360 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:33,296 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 286 Invalid, 360 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 360 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:33,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-17 18:17:33,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 100. [2024-09-17 18:17:33,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 78 states have (on average 1.141025641025641) internal successors, (89), 79 states have internal predecessors, (89), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:33,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 110 transitions. [2024-09-17 18:17:33,331 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 110 transitions. Word has length 80 [2024-09-17 18:17:33,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:33,331 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 110 transitions. [2024-09-17 18:17:33,331 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 38 states have internal predecessors, (69), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:33,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:33,331 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 110 transitions. [2024-09-17 18:17:33,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2024-09-17 18:17:33,332 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:33,332 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:33,348 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:33,532 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:33,533 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:33,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:33,534 INFO L85 PathProgramCache]: Analyzing trace with hash -1777712362, now seen corresponding path program 8 times [2024-09-17 18:17:33,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:33,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933284064] [2024-09-17 18:17:33,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:33,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:33,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:33,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-17 18:17:33,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:17:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:17:33,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:17:33,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:17:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:17:33,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:17:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:17:33,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 94 proven. 58 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:33,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933284064] [2024-09-17 18:17:33,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933284064] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:33,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174578214] [2024-09-17 18:17:33,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:33,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:33,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:33,796 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:33,797 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-17 18:17:33,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:33,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:33,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 18:17:33,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:34,179 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:34,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:34,411 INFO L134 CoverageAnalysis]: Checked inductivity of 264 backedges. 116 proven. 36 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:34,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174578214] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:34,412 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:34,412 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2024-09-17 18:17:34,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787979420] [2024-09-17 18:17:34,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:34,412 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 18:17:34,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:34,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 18:17:34,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=1063, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 18:17:34,414 INFO L87 Difference]: Start difference. First operand 100 states and 110 transitions. Second operand has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:34,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:34,672 INFO L93 Difference]: Finished difference Result 173 states and 203 transitions. [2024-09-17 18:17:34,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-17 18:17:34,673 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) Word has length 80 [2024-09-17 18:17:34,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:34,675 INFO L225 Difference]: With dead ends: 173 [2024-09-17 18:17:34,675 INFO L226 Difference]: Without dead ends: 138 [2024-09-17 18:17:34,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 147 SyntacticMatches, 18 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=1129, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 18:17:34,676 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 322 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:34,676 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 257 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 322 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:34,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2024-09-17 18:17:34,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 102. [2024-09-17 18:17:34,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 80 states have (on average 1.15) internal successors, (92), 81 states have internal predecessors, (92), 11 states have call successors, (11), 11 states have call predecessors, (11), 10 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:34,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 113 transitions. [2024-09-17 18:17:34,711 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 113 transitions. Word has length 80 [2024-09-17 18:17:34,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:34,711 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 113 transitions. [2024-09-17 18:17:34,712 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.837837837837838) internal successors, (68), 37 states have internal predecessors, (68), 19 states have call successors, (20), 2 states have call predecessors, (20), 1 states have return successors, (18), 18 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-17 18:17:34,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:34,712 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 113 transitions. [2024-09-17 18:17:34,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-17 18:17:34,712 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:34,713 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:34,730 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-17 18:17:34,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:34,917 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:34,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:34,917 INFO L85 PathProgramCache]: Analyzing trace with hash 805249281, now seen corresponding path program 16 times [2024-09-17 18:17:34,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:34,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516705154] [2024-09-17 18:17:34,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:34,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:34,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:35,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:35,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:35,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:35,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:35,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:35,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:35,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:35,077 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 52 proven. 109 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:35,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:35,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516705154] [2024-09-17 18:17:35,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [516705154] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:35,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144819790] [2024-09-17 18:17:35,078 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:17:35,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:35,078 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:35,080 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:35,081 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-17 18:17:35,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:17:35,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:35,131 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:35,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:35,195 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:35,196 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:35,352 INFO L134 CoverageAnalysis]: Checked inductivity of 273 backedges. 61 proven. 100 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2024-09-17 18:17:35,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2144819790] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:35,352 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:35,352 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 17 [2024-09-17 18:17:35,352 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452631427] [2024-09-17 18:17:35,353 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:35,353 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:17:35,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:35,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:17:35,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:17:35,354 INFO L87 Difference]: Start difference. First operand 102 states and 113 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:35,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:35,507 INFO L93 Difference]: Finished difference Result 115 states and 127 transitions. [2024-09-17 18:17:35,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 18:17:35,507 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Word has length 81 [2024-09-17 18:17:35,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:35,509 INFO L225 Difference]: With dead ends: 115 [2024-09-17 18:17:35,509 INFO L226 Difference]: Without dead ends: 113 [2024-09-17 18:17:35,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 168 SyntacticMatches, 18 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:17:35,509 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 25 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:35,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 249 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:35,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-09-17 18:17:35,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 109. [2024-09-17 18:17:35,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 86 states have internal predecessors, (97), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:35,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 120 transitions. [2024-09-17 18:17:35,547 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 120 transitions. Word has length 81 [2024-09-17 18:17:35,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:35,548 INFO L474 AbstractCegarLoop]: Abstraction has 109 states and 120 transitions. [2024-09-17 18:17:35,548 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 15 states have internal predecessors, (48), 10 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-17 18:17:35,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:35,548 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 120 transitions. [2024-09-17 18:17:35,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:35,549 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:35,549 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:35,565 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:35,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:35,749 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:35,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:35,750 INFO L85 PathProgramCache]: Analyzing trace with hash 41469239, now seen corresponding path program 17 times [2024-09-17 18:17:35,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:35,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782897849] [2024-09-17 18:17:35,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:35,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:35,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:36,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:36,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:36,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:36,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:36,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:36,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:36,065 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:36,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782897849] [2024-09-17 18:17:36,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782897849] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:36,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938490564] [2024-09-17 18:17:36,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:36,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:36,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:36,068 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:36,069 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-17 18:17:36,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-17 18:17:36,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:36,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:36,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:36,668 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:36,668 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:36,964 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:36,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938490564] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:36,965 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:36,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 49 [2024-09-17 18:17:36,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631317092] [2024-09-17 18:17:36,965 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:36,966 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-17 18:17:36,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:36,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-17 18:17:36,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=451, Invalid=1901, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:17:36,968 INFO L87 Difference]: Start difference. First operand 109 states and 120 transitions. Second operand has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:37,210 INFO L93 Difference]: Finished difference Result 187 states and 219 transitions. [2024-09-17 18:17:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:37,211 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:37,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:37,212 INFO L225 Difference]: With dead ends: 187 [2024-09-17 18:17:37,212 INFO L226 Difference]: Without dead ends: 149 [2024-09-17 18:17:37,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 153 SyntacticMatches, 20 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1793 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=459, Invalid=1991, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:17:37,213 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:37,214 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 235 Invalid, 301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:37,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2024-09-17 18:17:37,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 110. [2024-09-17 18:17:37,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:37,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:37,255 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:37,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:37,256 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:37,256 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.6734693877551021) internal successors, (82), 49 states have internal predecessors, (82), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:37,256 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:37,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:37,257 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:37,257 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:37,272 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:37,461 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:37,462 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:37,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:37,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1330059702, now seen corresponding path program 29 times [2024-09-17 18:17:37,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:37,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998535823] [2024-09-17 18:17:37,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:37,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:37,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:37,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:37,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:37,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:37,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:37,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:37,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,783 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:37,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:37,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:37,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:37,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:37,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998535823] [2024-09-17 18:17:37,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998535823] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:37,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799030501] [2024-09-17 18:17:37,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:37,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:37,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:37,791 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:37,792 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-17 18:17:37,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-17 18:17:37,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:37,846 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:37,848 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:38,363 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:38,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:38,641 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:38,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799030501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:38,642 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:38,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 48 [2024-09-17 18:17:38,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284936806] [2024-09-17 18:17:38,642 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:38,643 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 18:17:38,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:38,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 18:17:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:17:38,645 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:38,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:38,928 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-17 18:17:38,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:38,928 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:38,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:38,930 INFO L225 Difference]: With dead ends: 195 [2024-09-17 18:17:38,930 INFO L226 Difference]: Without dead ends: 157 [2024-09-17 18:17:38,930 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 154 SyntacticMatches, 20 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1717 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:17:38,931 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 350 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:38,931 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 273 Invalid, 350 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:38,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-17 18:17:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-17 18:17:38,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:38,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:38,973 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:38,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:38,974 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:38,974 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6875) internal successors, (81), 48 states have internal predecessors, (81), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:38,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:38,974 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:38,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:38,975 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:38,975 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:38,991 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:39,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:39,180 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:39,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:39,180 INFO L85 PathProgramCache]: Analyzing trace with hash -13846185, now seen corresponding path program 30 times [2024-09-17 18:17:39,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:39,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766386680] [2024-09-17 18:17:39,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:39,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:39,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:39,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:39,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:39,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:39,508 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:39,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766386680] [2024-09-17 18:17:39,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766386680] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:39,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711081600] [2024-09-17 18:17:39,509 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:39,509 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:39,509 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:39,511 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:39,513 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-17 18:17:39,566 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-17 18:17:39,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:39,568 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:39,570 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:40,063 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:40,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:40,344 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:40,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711081600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:40,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:40,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 47 [2024-09-17 18:17:40,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835091951] [2024-09-17 18:17:40,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:40,345 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 18:17:40,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:40,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 18:17:40,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1769, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:17:40,347 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:40,672 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-17 18:17:40,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:40,674 INFO L225 Difference]: With dead ends: 201 [2024-09-17 18:17:40,674 INFO L226 Difference]: Without dead ends: 163 [2024-09-17 18:17:40,675 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 155 SyntacticMatches, 20 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1606 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=401, Invalid=1855, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:17:40,675 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 409 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 360 SdHoareTripleChecker+Invalid, 409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:40,675 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 360 Invalid, 409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 409 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-17 18:17:40,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-17 18:17:40,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:40,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:40,721 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:40,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:40,721 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:40,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:40,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:40,721 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:40,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:40,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:40,722 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:40,737 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2024-09-17 18:17:40,926 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-17 18:17:40,927 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:40,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:40,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1882464662, now seen corresponding path program 31 times [2024-09-17 18:17:40,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:40,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550811855] [2024-09-17 18:17:40,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:40,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:40,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:41,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:41,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:41,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:41,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:41,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:41,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:41,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,244 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:41,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:41,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550811855] [2024-09-17 18:17:41,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550811855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:41,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942523212] [2024-09-17 18:17:41,245 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:41,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:41,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:41,247 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:41,249 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-17 18:17:41,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:41,300 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:41,302 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:41,776 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:41,776 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:42,049 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:42,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942523212] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:42,050 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:42,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 46 [2024-09-17 18:17:42,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731152562] [2024-09-17 18:17:42,050 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:42,050 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-17 18:17:42,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-17 18:17:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=370, Invalid=1700, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:17:42,051 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:42,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:42,415 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-17 18:17:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:42,415 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:42,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:42,417 INFO L225 Difference]: With dead ends: 205 [2024-09-17 18:17:42,417 INFO L226 Difference]: Without dead ends: 167 [2024-09-17 18:17:42,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 156 SyntacticMatches, 20 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1498 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:17:42,418 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 318 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:42,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 351 Invalid, 414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:42,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-17 18:17:42,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-17 18:17:42,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:42,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:42,465 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:42,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:42,466 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:42,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7173913043478262) internal successors, (79), 46 states have internal predecessors, (79), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:42,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:42,466 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:42,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:42,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:42,467 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:42,483 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:42,670 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-17 18:17:42,671 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:42,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:42,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1250899319, now seen corresponding path program 32 times [2024-09-17 18:17:42,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:42,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2054158906] [2024-09-17 18:17:42,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:42,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:42,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:42,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:42,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:42,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:42,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:42,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:42,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:42,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:42,989 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:42,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2054158906] [2024-09-17 18:17:42,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2054158906] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:42,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740468815] [2024-09-17 18:17:42,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:42,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:42,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:42,993 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:42,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-17 18:17:43,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:43,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:43,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:43,047 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:43,511 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:43,511 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:43,789 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:43,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740468815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:43,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:43,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 45 [2024-09-17 18:17:43,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096113117] [2024-09-17 18:17:43,790 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:43,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-17 18:17:43,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:43,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-17 18:17:43,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=1629, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:17:43,792 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:44,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:44,163 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-17 18:17:44,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:44,163 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:44,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:44,165 INFO L225 Difference]: With dead ends: 207 [2024-09-17 18:17:44,165 INFO L226 Difference]: Without dead ends: 169 [2024-09-17 18:17:44,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 157 SyntacticMatches, 20 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1393 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=359, Invalid=1711, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:17:44,166 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 375 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 240 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 375 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:44,166 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 240 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 375 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:44,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-17 18:17:44,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-17 18:17:44,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:44,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:44,233 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:44,236 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:44,236 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7333333333333334) internal successors, (78), 45 states have internal predecessors, (78), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:44,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:44,237 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:44,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:44,237 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:44,237 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:44,254 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:44,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-17 18:17:44,441 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:44,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:44,442 INFO L85 PathProgramCache]: Analyzing trace with hash -293494410, now seen corresponding path program 33 times [2024-09-17 18:17:44,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:44,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620800400] [2024-09-17 18:17:44,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:44,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:44,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,828 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:44,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:44,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:44,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:44,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:44,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:44,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:44,846 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 119 proven. 50 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:44,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620800400] [2024-09-17 18:17:44,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620800400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:44,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810186166] [2024-09-17 18:17:44,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:44,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:44,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:44,849 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:44,850 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-17 18:17:44,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 18:17:44,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:44,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:44,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:45,351 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:45,351 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:45,623 INFO L134 CoverageAnalysis]: Checked inductivity of 313 backedges. 144 proven. 25 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:45,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810186166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:45,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:45,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 44 [2024-09-17 18:17:45,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210952387] [2024-09-17 18:17:45,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:45,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-17 18:17:45,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-17 18:17:45,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:17:45,626 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:46,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:46,002 INFO L93 Difference]: Finished difference Result 207 states and 239 transitions. [2024-09-17 18:17:46,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:46,003 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:46,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:46,004 INFO L225 Difference]: With dead ends: 207 [2024-09-17 18:17:46,004 INFO L226 Difference]: Without dead ends: 169 [2024-09-17 18:17:46,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 158 SyntacticMatches, 20 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=344, Invalid=1636, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:17:46,005 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:46,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 263 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:46,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2024-09-17 18:17:46,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 110. [2024-09-17 18:17:46,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:46,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:46,054 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:46,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:46,054 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:46,055 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.75) internal successors, (77), 44 states have internal predecessors, (77), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:46,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:46,055 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:46,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:46,055 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:46,056 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:46,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:46,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-17 18:17:46,258 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:46,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:46,258 INFO L85 PathProgramCache]: Analyzing trace with hash 1319254423, now seen corresponding path program 34 times [2024-09-17 18:17:46,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:46,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812943778] [2024-09-17 18:17:46,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:46,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:46,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:46,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,547 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:46,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:46,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:46,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:46,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:46,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:46,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:46,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,558 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:46,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 119 proven. 52 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:46,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812943778] [2024-09-17 18:17:46,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812943778] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:46,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884842810] [2024-09-17 18:17:46,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:17:46,561 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:46,561 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:46,563 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:46,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-17 18:17:46,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:17:46,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:46,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:46,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:47,056 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:47,057 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:47,322 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 144 proven. 27 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:47,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884842810] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:47,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:47,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 43 [2024-09-17 18:17:47,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343221572] [2024-09-17 18:17:47,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:47,323 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-17 18:17:47,323 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:47,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-17 18:17:47,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=1481, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 18:17:47,324 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:47,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:47,665 INFO L93 Difference]: Finished difference Result 205 states and 237 transitions. [2024-09-17 18:17:47,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:47,665 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:47,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:47,666 INFO L225 Difference]: With dead ends: 205 [2024-09-17 18:17:47,667 INFO L226 Difference]: Without dead ends: 167 [2024-09-17 18:17:47,667 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 159 SyntacticMatches, 20 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1192 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=333, Invalid=1559, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:17:47,667 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 236 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 271 SdHoareTripleChecker+Invalid, 314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:47,668 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 271 Invalid, 314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 314 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:47,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-17 18:17:47,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 110. [2024-09-17 18:17:47,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:47,715 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:47,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:47,715 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:47,715 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.7674418604651163) internal successors, (76), 43 states have internal predecessors, (76), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:47,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:47,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:47,716 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:47,716 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:47,731 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-17 18:17:47,916 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2024-09-17 18:17:47,916 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:47,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:47,917 INFO L85 PathProgramCache]: Analyzing trace with hash 401447254, now seen corresponding path program 35 times [2024-09-17 18:17:47,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:47,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506664170] [2024-09-17 18:17:47,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:47,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:48,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:48,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:48,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:48,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:48,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:48,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:48,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:48,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:48,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:48,205 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 119 proven. 56 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:48,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506664170] [2024-09-17 18:17:48,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506664170] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:48,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401804489] [2024-09-17 18:17:48,205 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:17:48,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:48,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:48,207 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:48,215 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-17 18:17:48,270 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2024-09-17 18:17:48,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:48,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:48,273 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:48,692 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:48,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:48,966 INFO L134 CoverageAnalysis]: Checked inductivity of 319 backedges. 144 proven. 31 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:48,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401804489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:48,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:48,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 42 [2024-09-17 18:17:48,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756273606] [2024-09-17 18:17:48,967 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:48,967 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-17 18:17:48,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:48,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-17 18:17:48,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=1404, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:17:48,969 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:49,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:49,340 INFO L93 Difference]: Finished difference Result 201 states and 233 transitions. [2024-09-17 18:17:49,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:49,341 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:49,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:49,343 INFO L225 Difference]: With dead ends: 201 [2024-09-17 18:17:49,343 INFO L226 Difference]: Without dead ends: 163 [2024-09-17 18:17:49,343 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 160 SyntacticMatches, 20 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1096 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=326, Invalid=1480, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 18:17:49,344 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 321 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:49,344 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 321 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:49,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-17 18:17:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 110. [2024-09-17 18:17:49,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:49,394 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:49,395 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:49,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7857142857142858) internal successors, (75), 42 states have internal predecessors, (75), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:49,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:49,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:49,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:49,396 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:49,416 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2024-09-17 18:17:49,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:49,597 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:49,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:49,597 INFO L85 PathProgramCache]: Analyzing trace with hash 233293239, now seen corresponding path program 36 times [2024-09-17 18:17:49,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:49,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837599339] [2024-09-17 18:17:49,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:49,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:49,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:49,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:49,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:49,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:49,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:49,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:49,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:49,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:49,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:49,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:49,892 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 119 proven. 62 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:49,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:49,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837599339] [2024-09-17 18:17:49,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837599339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:49,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670184380] [2024-09-17 18:17:49,893 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:49,893 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:49,893 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:49,895 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:49,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-17 18:17:49,949 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-17 18:17:49,950 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:49,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:49,953 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:50,344 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:50,345 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:50,612 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 144 proven. 37 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:50,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [670184380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:50,613 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:50,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 41 [2024-09-17 18:17:50,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009676203] [2024-09-17 18:17:50,613 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:50,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-17 18:17:50,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:50,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-17 18:17:50,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=315, Invalid=1325, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:50,615 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:50,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:50,937 INFO L93 Difference]: Finished difference Result 195 states and 227 transitions. [2024-09-17 18:17:50,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:50,938 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:50,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:50,939 INFO L225 Difference]: With dead ends: 195 [2024-09-17 18:17:50,939 INFO L226 Difference]: Without dead ends: 157 [2024-09-17 18:17:50,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 161 SyntacticMatches, 20 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1003 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=323, Invalid=1399, Unknown=0, NotChecked=0, Total=1722 [2024-09-17 18:17:50,940 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:50,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 226 Invalid, 336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:50,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-17 18:17:50,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 110. [2024-09-17 18:17:50,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 87 states have internal predecessors, (98), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:50,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 121 transitions. [2024-09-17 18:17:50,993 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 121 transitions. Word has length 88 [2024-09-17 18:17:50,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:50,993 INFO L474 AbstractCegarLoop]: Abstraction has 110 states and 121 transitions. [2024-09-17 18:17:50,993 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.8048780487804879) internal successors, (74), 41 states have internal predecessors, (74), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:50,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:50,993 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 121 transitions. [2024-09-17 18:17:50,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2024-09-17 18:17:50,994 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:50,994 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:51,013 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2024-09-17 18:17:51,198 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:51,199 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:51,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:51,199 INFO L85 PathProgramCache]: Analyzing trace with hash -1850341066, now seen corresponding path program 9 times [2024-09-17 18:17:51,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:51,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557207142] [2024-09-17 18:17:51,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:51,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:51,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:51,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:17:51,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,488 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-17 18:17:51,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,489 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2024-09-17 18:17:51,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2024-09-17 18:17:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 49 [2024-09-17 18:17:51,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2024-09-17 18:17:51,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,495 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 63 [2024-09-17 18:17:51,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-17 18:17:51,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 77 [2024-09-17 18:17:51,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 119 proven. 70 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557207142] [2024-09-17 18:17:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557207142] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959516663] [2024-09-17 18:17:51,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:17:51,500 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:51,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:51,502 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:51,503 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-17 18:17:51,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 18:17:51,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:51,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 18:17:51,559 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:51,950 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:51,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:52,220 INFO L134 CoverageAnalysis]: Checked inductivity of 333 backedges. 144 proven. 45 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:52,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1959516663] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:52,221 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:52,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2024-09-17 18:17:52,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245761671] [2024-09-17 18:17:52,221 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:52,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-17 18:17:52,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:52,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-17 18:17:52,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=316, Invalid=1244, Unknown=0, NotChecked=0, Total=1560 [2024-09-17 18:17:52,223 INFO L87 Difference]: Start difference. First operand 110 states and 121 transitions. Second operand has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:52,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:52,489 INFO L93 Difference]: Finished difference Result 190 states and 223 transitions. [2024-09-17 18:17:52,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-17 18:17:52,490 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) Word has length 88 [2024-09-17 18:17:52,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:52,491 INFO L225 Difference]: With dead ends: 190 [2024-09-17 18:17:52,491 INFO L226 Difference]: Without dead ends: 152 [2024-09-17 18:17:52,492 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 162 SyntacticMatches, 20 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 905 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=324, Invalid=1316, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 18:17:52,492 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 6 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:52,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 159 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2024-09-17 18:17:52,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 112. [2024-09-17 18:17:52,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 89 states have internal predecessors, (101), 12 states have call successors, (12), 12 states have call predecessors, (12), 11 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:17:52,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 124 transitions. [2024-09-17 18:17:52,541 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 124 transitions. Word has length 88 [2024-09-17 18:17:52,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:52,541 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 124 transitions. [2024-09-17 18:17:52,541 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.825) internal successors, (73), 40 states have internal predecessors, (73), 21 states have call successors, (22), 2 states have call predecessors, (22), 1 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-17 18:17:52,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:52,542 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 124 transitions. [2024-09-17 18:17:52,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2024-09-17 18:17:52,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:52,542 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:52,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-17 18:17:52,746 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2024-09-17 18:17:52,747 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:52,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:52,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1568569182, now seen corresponding path program 18 times [2024-09-17 18:17:52,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:52,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672210890] [2024-09-17 18:17:52,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:52,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:52,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:52,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:17:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:17:52,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:17:52,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:17:52,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:17:52,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:17:52,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:17:52,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:17:52,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:17:52,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:52,930 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 63 proven. 136 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:52,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672210890] [2024-09-17 18:17:52,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672210890] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:52,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1168421235] [2024-09-17 18:17:52,931 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:17:52,931 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:52,931 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:52,933 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:52,934 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-17 18:17:52,991 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2024-09-17 18:17:52,992 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:52,993 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:17:52,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:53,062 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:53,063 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:53,240 INFO L134 CoverageAnalysis]: Checked inductivity of 343 backedges. 73 proven. 126 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2024-09-17 18:17:53,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1168421235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:53,241 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:53,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 18 [2024-09-17 18:17:53,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444110441] [2024-09-17 18:17:53,241 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:53,242 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-17 18:17:53,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:53,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-17 18:17:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-17 18:17:53,243 INFO L87 Difference]: Start difference. First operand 112 states and 124 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:53,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:53,420 INFO L93 Difference]: Finished difference Result 125 states and 138 transitions. [2024-09-17 18:17:53,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 18:17:53,420 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) Word has length 89 [2024-09-17 18:17:53,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:53,422 INFO L225 Difference]: With dead ends: 125 [2024-09-17 18:17:53,422 INFO L226 Difference]: Without dead ends: 123 [2024-09-17 18:17:53,422 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 185 SyntacticMatches, 20 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:17:53,422 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 24 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:53,423 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 269 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:17:53,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2024-09-17 18:17:53,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 119. [2024-09-17 18:17:53,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 94 states have internal predecessors, (106), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:17:53,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 131 transitions. [2024-09-17 18:17:53,474 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 131 transitions. Word has length 89 [2024-09-17 18:17:53,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:53,474 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 131 transitions. [2024-09-17 18:17:53,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 16 states have internal predecessors, (51), 11 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:17:53,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:53,474 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 131 transitions. [2024-09-17 18:17:53,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:17:53,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:53,476 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:53,495 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-09-17 18:17:53,680 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:53,681 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:53,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:53,681 INFO L85 PathProgramCache]: Analyzing trace with hash 123844214, now seen corresponding path program 19 times [2024-09-17 18:17:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546659133] [2024-09-17 18:17:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:53,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:53,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:54,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:17:54,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:17:54,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:17:54,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:17:54,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:17:54,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:17:54,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:17:54,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:17:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:17:54,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:17:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,075 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:54,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546659133] [2024-09-17 18:17:54,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546659133] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:54,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701564908] [2024-09-17 18:17:54,075 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:54,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:54,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:54,077 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:54,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-17 18:17:54,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:54,134 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:17:54,136 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:54,757 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:54,757 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701564908] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:55,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:55,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 53 [2024-09-17 18:17:55,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856486783] [2024-09-17 18:17:55,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:55,108 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-17 18:17:55,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-17 18:17:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=527, Invalid=2229, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:17:55,110 INFO L87 Difference]: Start difference. First operand 119 states and 131 transitions. Second operand has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:55,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:55,496 INFO L93 Difference]: Finished difference Result 204 states and 239 transitions. [2024-09-17 18:17:55,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:17:55,497 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:17:55,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:55,498 INFO L225 Difference]: With dead ends: 204 [2024-09-17 18:17:55,498 INFO L226 Difference]: Without dead ends: 163 [2024-09-17 18:17:55,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 167 SyntacticMatches, 22 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=535, Invalid=2327, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:17:55,500 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 296 SdHoareTripleChecker+Invalid, 551 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:55,500 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 296 Invalid, 551 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:55,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-17 18:17:55,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 120. [2024-09-17 18:17:55,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:17:55,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:17:55,576 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:17:55,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:55,576 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:17:55,576 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6603773584905661) internal successors, (88), 53 states have internal predecessors, (88), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:55,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:55,577 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:17:55,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:17:55,577 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:55,577 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:55,592 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2024-09-17 18:17:55,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:55,782 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:55,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:55,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1467016203, now seen corresponding path program 37 times [2024-09-17 18:17:55,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:55,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527101057] [2024-09-17 18:17:55,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:55,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:55,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:56,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,125 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:17:56,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,127 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:17:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:17:56,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:17:56,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:17:56,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:17:56,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,133 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:17:56,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:17:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:17:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:17:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,139 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:56,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527101057] [2024-09-17 18:17:56,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527101057] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:56,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186700799] [2024-09-17 18:17:56,139 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:17:56,139 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:56,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:56,141 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:56,142 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-17 18:17:56,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:56,196 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:17:56,198 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:56,779 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:56,780 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:57,112 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:57,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186700799] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:57,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:57,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 52 [2024-09-17 18:17:57,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781326251] [2024-09-17 18:17:57,113 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:57,113 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-17 18:17:57,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:57,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-17 18:17:57,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=2159, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:17:57,115 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:57,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:57,533 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-17 18:17:57,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:17:57,534 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:17:57,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:57,536 INFO L225 Difference]: With dead ends: 213 [2024-09-17 18:17:57,536 INFO L226 Difference]: Without dead ends: 172 [2024-09-17 18:17:57,536 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 168 SyntacticMatches, 22 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2061 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=501, Invalid=2255, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:17:57,537 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 291 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:57,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:57,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-17 18:17:57,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-17 18:17:57,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:17:57,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:17:57,600 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:17:57,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:57,600 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:17:57,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.6730769230769231) internal successors, (87), 52 states have internal predecessors, (87), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:57,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:57,601 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:17:57,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:17:57,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:57,601 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:57,618 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-17 18:17:57,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2024-09-17 18:17:57,806 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:57,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:57,806 INFO L85 PathProgramCache]: Analyzing trace with hash 1668254358, now seen corresponding path program 38 times [2024-09-17 18:17:57,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:57,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447687878] [2024-09-17 18:17:57,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:57,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:57,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:17:58,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:17:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:17:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:17:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:17:58,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:17:58,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:17:58,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:17:58,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:17:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:17:58,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:17:58,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:17:58,160 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:58,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:17:58,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447687878] [2024-09-17 18:17:58,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447687878] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:17:58,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636624795] [2024-09-17 18:17:58,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:17:58,160 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:17:58,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:17:58,162 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:17:58,163 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-17 18:17:58,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:17:58,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:17:58,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:17:58,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:17:58,703 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:58,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:17:59,021 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:17:59,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636624795] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:17:59,022 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:17:59,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 51 [2024-09-17 18:17:59,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424306657] [2024-09-17 18:17:59,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:17:59,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-17 18:17:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:17:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-17 18:17:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=2087, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:17:59,023 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:59,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:17:59,432 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-17 18:17:59,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:17:59,432 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:17:59,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:17:59,434 INFO L225 Difference]: With dead ends: 220 [2024-09-17 18:17:59,434 INFO L226 Difference]: Without dead ends: 179 [2024-09-17 18:17:59,435 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 169 SyntacticMatches, 22 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=471, Invalid=2181, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:17:59,435 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 234 mSDsCounter, 0 mSdLazyCounter, 400 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 400 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:17:59,435 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 269 Invalid, 400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 400 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:17:59,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-17 18:17:59,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-17 18:17:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:17:59,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:17:59,502 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:17:59,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:17:59,503 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:17:59,503 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6862745098039216) internal successors, (86), 51 states have internal predecessors, (86), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:17:59,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:17:59,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:17:59,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:17:59,504 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:17:59,520 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2024-09-17 18:17:59,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-17 18:17:59,709 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:17:59,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:17:59,710 INFO L85 PathProgramCache]: Analyzing trace with hash 661013461, now seen corresponding path program 39 times [2024-09-17 18:17:59,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:17:59,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185249525] [2024-09-17 18:17:59,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:17:59,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:17:59,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:00,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:00,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:00,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:00,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:00,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:00,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:00,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:00,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:00,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:00,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:00,061 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:00,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185249525] [2024-09-17 18:18:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185249525] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:00,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375581666] [2024-09-17 18:18:00,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:18:00,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:00,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:00,064 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:00,065 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-17 18:18:00,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-17 18:18:00,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:00,121 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:00,123 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:00,672 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:00,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:00,988 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:00,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375581666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:00,988 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:00,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 50 [2024-09-17 18:18:00,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718095858] [2024-09-17 18:18:00,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:00,989 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-17 18:18:00,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:00,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-17 18:18:00,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=2013, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:18:00,990 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:01,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:01,436 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-17 18:18:01,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:01,436 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:01,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:01,438 INFO L225 Difference]: With dead ends: 225 [2024-09-17 18:18:01,438 INFO L226 Difference]: Without dead ends: 184 [2024-09-17 18:18:01,439 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 170 SyntacticMatches, 22 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1820 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=445, Invalid=2105, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:18:01,439 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:01,439 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:01,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-17 18:18:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-17 18:18:01,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:01,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:01,532 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:01,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:01,533 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:01,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.7) internal successors, (85), 50 states have internal predecessors, (85), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:01,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:01,533 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:01,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:01,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:01,534 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:01,549 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:01,737 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-17 18:18:01,738 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:01,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:01,738 INFO L85 PathProgramCache]: Analyzing trace with hash -618404170, now seen corresponding path program 40 times [2024-09-17 18:18:01,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:01,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685892429] [2024-09-17 18:18:01,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:01,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:01,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:02,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,073 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:02,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:02,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:02,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:02,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:02,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:02,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:02,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:02,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:02,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:02,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:02,087 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:02,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685892429] [2024-09-17 18:18:02,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685892429] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:02,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644087367] [2024-09-17 18:18:02,087 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:02,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:02,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:02,089 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:02,090 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-17 18:18:02,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:02,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:02,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:02,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:02,694 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:02,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:03,008 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:03,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644087367] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:03,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:03,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 49 [2024-09-17 18:18:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372073856] [2024-09-17 18:18:03,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:03,010 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-17 18:18:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:03,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-17 18:18:03,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=415, Invalid=1937, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:18:03,011 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:03,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:03,609 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-17 18:18:03,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:03,609 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:03,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:03,611 INFO L225 Difference]: With dead ends: 228 [2024-09-17 18:18:03,611 INFO L226 Difference]: Without dead ends: 187 [2024-09-17 18:18:03,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 171 SyntacticMatches, 22 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=423, Invalid=2027, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:18:03,612 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 403 mSDsCounter, 0 mSdLazyCounter, 590 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 436 SdHoareTripleChecker+Invalid, 590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:03,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 436 Invalid, 590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 590 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:03,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-17 18:18:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-17 18:18:03,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:03,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:03,694 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:03,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:03,694 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:03,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 49 states have internal predecessors, (84), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:03,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:03,695 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:03,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:03,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:03,696 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:03,714 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-09-17 18:18:03,896 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-17 18:18:03,897 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:03,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:03,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1213865035, now seen corresponding path program 41 times [2024-09-17 18:18:03,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:03,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612877833] [2024-09-17 18:18:03,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:03,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:04,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,237 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:04,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:04,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:04,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:04,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:04,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:04,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:04,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:04,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:04,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:04,254 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 147 proven. 58 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:04,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:04,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612877833] [2024-09-17 18:18:04,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612877833] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:04,255 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275443379] [2024-09-17 18:18:04,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:04,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:04,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:04,260 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:04,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-17 18:18:04,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2024-09-17 18:18:04,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:04,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:04,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:04,908 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:04,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 385 backedges. 175 proven. 30 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:05,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275443379] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:05,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:05,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 48 [2024-09-17 18:18:05,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980930776] [2024-09-17 18:18:05,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:05,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 18:18:05,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:05,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 18:18:05,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=397, Invalid=1859, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:18:05,226 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:05,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:05,780 INFO L93 Difference]: Finished difference Result 229 states and 264 transitions. [2024-09-17 18:18:05,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:05,780 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:05,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:05,782 INFO L225 Difference]: With dead ends: 229 [2024-09-17 18:18:05,782 INFO L226 Difference]: Without dead ends: 188 [2024-09-17 18:18:05,782 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 172 SyntacticMatches, 22 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1591 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=405, Invalid=1947, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:18:05,783 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 556 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:05,783 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 456 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 556 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:18:05,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-09-17 18:18:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 120. [2024-09-17 18:18:05,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:05,851 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:05,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:05,851 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:05,851 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7291666666666667) internal successors, (83), 48 states have internal predecessors, (83), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:05,851 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:05,851 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:05,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:05,852 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:05,852 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:05,867 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:06,052 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:06,053 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:06,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:06,054 INFO L85 PathProgramCache]: Analyzing trace with hash -1233073450, now seen corresponding path program 42 times [2024-09-17 18:18:06,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:06,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637075304] [2024-09-17 18:18:06,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:06,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:06,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:06,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:06,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,386 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:06,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:06,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:06,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:06,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:06,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:06,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,396 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:06,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:06,397 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 147 proven. 59 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:06,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637075304] [2024-09-17 18:18:06,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637075304] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:06,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227045823] [2024-09-17 18:18:06,398 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:18:06,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:06,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:06,400 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:06,401 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-17 18:18:06,461 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2024-09-17 18:18:06,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:06,463 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:06,464 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:06,995 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:06,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 175 proven. 31 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:07,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227045823] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:07,300 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:07,300 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 47 [2024-09-17 18:18:07,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334306729] [2024-09-17 18:18:07,300 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:07,300 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 18:18:07,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:07,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 18:18:07,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:18:07,301 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:07,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:07,883 INFO L93 Difference]: Finished difference Result 228 states and 263 transitions. [2024-09-17 18:18:07,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:07,884 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:07,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:07,885 INFO L225 Difference]: With dead ends: 228 [2024-09-17 18:18:07,885 INFO L226 Difference]: Without dead ends: 187 [2024-09-17 18:18:07,886 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 173 SyntacticMatches, 22 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1481 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=391, Invalid=1865, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:18:07,886 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:07,886 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:18:07,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-17 18:18:07,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 120. [2024-09-17 18:18:07,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:07,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:07,955 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:07,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:07,955 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:07,955 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7446808510638299) internal successors, (82), 47 states have internal predecessors, (82), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:07,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:07,955 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:07,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:07,956 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:07,956 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:07,971 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:08,156 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:08,157 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:08,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:08,157 INFO L85 PathProgramCache]: Analyzing trace with hash 151780245, now seen corresponding path program 43 times [2024-09-17 18:18:08,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:08,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360502480] [2024-09-17 18:18:08,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:08,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:08,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:08,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:08,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,473 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,474 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:08,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:08,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,478 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 147 proven. 62 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:08,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360502480] [2024-09-17 18:18:08,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360502480] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:08,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511852107] [2024-09-17 18:18:08,479 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:18:08,479 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:08,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:08,499 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:08,500 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-17 18:18:08,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:08,552 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:08,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:09,068 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:09,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:09,382 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 175 proven. 34 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:09,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511852107] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:09,383 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:09,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 46 [2024-09-17 18:18:09,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362734555] [2024-09-17 18:18:09,383 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:09,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-17 18:18:09,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:09,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-17 18:18:09,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=1697, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:18:09,384 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:09,808 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:09,809 INFO L93 Difference]: Finished difference Result 225 states and 260 transitions. [2024-09-17 18:18:09,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:09,809 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:09,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:09,811 INFO L225 Difference]: With dead ends: 225 [2024-09-17 18:18:09,811 INFO L226 Difference]: Without dead ends: 184 [2024-09-17 18:18:09,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 174 SyntacticMatches, 22 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=381, Invalid=1781, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:18:09,812 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 253 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 253 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:09,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 191 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 253 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:18:09,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2024-09-17 18:18:09,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 120. [2024-09-17 18:18:09,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:09,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:09,901 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:09,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:09,901 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:09,901 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.7608695652173914) internal successors, (81), 46 states have internal predecessors, (81), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:09,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:09,901 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:09,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:09,902 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:09,902 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:09,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-17 18:18:10,102 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:10,102 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:10,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:10,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1443378934, now seen corresponding path program 44 times [2024-09-17 18:18:10,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:10,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446580330] [2024-09-17 18:18:10,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:10,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:10,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:10,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,437 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:10,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:10,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:10,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:10,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:10,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:10,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:10,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:10,449 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 147 proven. 67 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:10,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446580330] [2024-09-17 18:18:10,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446580330] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:10,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984139753] [2024-09-17 18:18:10,450 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:18:10,450 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:10,450 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:10,452 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:10,453 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-17 18:18:10,509 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:18:10,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:10,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:10,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:10,987 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:10,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 394 backedges. 175 proven. 39 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:11,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984139753] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:11,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:11,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 45 [2024-09-17 18:18:11,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044213136] [2024-09-17 18:18:11,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:11,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-17 18:18:11,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:11,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-17 18:18:11,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1613, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:18:11,300 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:11,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:11,832 INFO L93 Difference]: Finished difference Result 220 states and 255 transitions. [2024-09-17 18:18:11,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:11,832 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:11,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:11,834 INFO L225 Difference]: With dead ends: 220 [2024-09-17 18:18:11,834 INFO L226 Difference]: Without dead ends: 179 [2024-09-17 18:18:11,834 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 175 SyntacticMatches, 22 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1270 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=1695, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:18:11,835 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 361 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 396 SdHoareTripleChecker+Invalid, 517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:11,835 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 396 Invalid, 517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:11,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2024-09-17 18:18:11,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 120. [2024-09-17 18:18:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:11,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:11,913 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:11,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:11,913 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:11,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.7777777777777777) internal successors, (80), 45 states have internal predecessors, (80), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:11,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:11,914 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:11,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:11,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:11,915 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:11,932 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:12,118 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:12,119 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:12,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:12,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1562997899, now seen corresponding path program 45 times [2024-09-17 18:18:12,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719462832] [2024-09-17 18:18:12,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:12,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:12,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:12,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:12,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:12,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:12,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:12,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:12,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:12,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:12,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:12,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:12,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:12,473 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 147 proven. 74 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:12,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:12,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719462832] [2024-09-17 18:18:12,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719462832] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:12,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374321760] [2024-09-17 18:18:12,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:18:12,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:12,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:12,476 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:12,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-17 18:18:12,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2024-09-17 18:18:12,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:12,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:12,539 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:13,006 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:13,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:13,323 INFO L134 CoverageAnalysis]: Checked inductivity of 401 backedges. 175 proven. 46 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:13,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374321760] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:13,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:13,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 44 [2024-09-17 18:18:13,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40377951] [2024-09-17 18:18:13,325 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:13,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-17 18:18:13,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:13,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-17 18:18:13,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=365, Invalid=1527, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:18:13,326 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:13,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:13,840 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-17 18:18:13,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:13,840 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:13,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:13,842 INFO L225 Difference]: With dead ends: 213 [2024-09-17 18:18:13,843 INFO L226 Difference]: Without dead ends: 172 [2024-09-17 18:18:13,843 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 176 SyntacticMatches, 22 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1169 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=373, Invalid=1607, Unknown=0, NotChecked=0, Total=1980 [2024-09-17 18:18:13,844 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 6 mSDsluCounter, 328 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 361 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:13,844 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 361 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:13,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-17 18:18:13,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 120. [2024-09-17 18:18:13,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 94 states have (on average 1.1382978723404256) internal successors, (107), 95 states have internal predecessors, (107), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:13,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 132 transitions. [2024-09-17 18:18:13,961 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 132 transitions. Word has length 96 [2024-09-17 18:18:13,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:13,961 INFO L474 AbstractCegarLoop]: Abstraction has 120 states and 132 transitions. [2024-09-17 18:18:13,962 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.7954545454545454) internal successors, (79), 44 states have internal predecessors, (79), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:13,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:13,962 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 132 transitions. [2024-09-17 18:18:13,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2024-09-17 18:18:13,963 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:13,963 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:13,980 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:14,167 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:14,169 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:14,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:14,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1388063510, now seen corresponding path program 10 times [2024-09-17 18:18:14,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:14,170 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184803366] [2024-09-17 18:18:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:14,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:14,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:14,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:18:14,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-17 18:18:14,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2024-09-17 18:18:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-17 18:18:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-17 18:18:14,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-17 18:18:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-17 18:18:14,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-17 18:18:14,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2024-09-17 18:18:14,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,525 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-17 18:18:14,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:14,526 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 147 proven. 83 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:14,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:14,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184803366] [2024-09-17 18:18:14,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184803366] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:14,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275266906] [2024-09-17 18:18:14,527 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:14,527 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:14,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:14,529 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:14,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-17 18:18:14,587 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:14,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:14,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:18:14,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:15,039 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:15,040 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:15,355 INFO L134 CoverageAnalysis]: Checked inductivity of 410 backedges. 175 proven. 55 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:15,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [275266906] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:15,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:15,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27, 27] total 43 [2024-09-17 18:18:15,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287241569] [2024-09-17 18:18:15,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:15,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2024-09-17 18:18:15,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:15,357 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2024-09-17 18:18:15,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=367, Invalid=1439, Unknown=0, NotChecked=0, Total=1806 [2024-09-17 18:18:15,358 INFO L87 Difference]: Start difference. First operand 120 states and 132 transitions. Second operand has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:15,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:15,743 INFO L93 Difference]: Finished difference Result 207 states and 243 transitions. [2024-09-17 18:18:15,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-17 18:18:15,744 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) Word has length 96 [2024-09-17 18:18:15,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:15,746 INFO L225 Difference]: With dead ends: 207 [2024-09-17 18:18:15,746 INFO L226 Difference]: Without dead ends: 166 [2024-09-17 18:18:15,746 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 177 SyntacticMatches, 22 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=375, Invalid=1517, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 18:18:15,747 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 334 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:15,747 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 334 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:15,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-17 18:18:15,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 122. [2024-09-17 18:18:15,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 96 states have (on average 1.1458333333333333) internal successors, (110), 97 states have internal predecessors, (110), 13 states have call successors, (13), 13 states have call predecessors, (13), 12 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:15,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 135 transitions. [2024-09-17 18:18:15,844 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 135 transitions. Word has length 96 [2024-09-17 18:18:15,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:15,844 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 135 transitions. [2024-09-17 18:18:15,844 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.813953488372093) internal successors, (78), 43 states have internal predecessors, (78), 23 states have call successors, (24), 2 states have call predecessors, (24), 1 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-17 18:18:15,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:15,844 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 135 transitions. [2024-09-17 18:18:15,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-17 18:18:15,845 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:15,845 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:15,861 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:16,049 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:16,051 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:16,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:16,052 INFO L85 PathProgramCache]: Analyzing trace with hash 949083873, now seen corresponding path program 20 times [2024-09-17 18:18:16,052 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:16,052 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771150719] [2024-09-17 18:18:16,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:16,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:16,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:16,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:16,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:16,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:16,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:16,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:16,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:16,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:16,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,254 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:16,256 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 75 proven. 166 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:16,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:16,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771150719] [2024-09-17 18:18:16,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771150719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:16,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256041438] [2024-09-17 18:18:16,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:18:16,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:16,257 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:16,259 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:16,260 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-17 18:18:16,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:18:16,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:16,315 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-17 18:18:16,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:16,384 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:16,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:16,600 INFO L134 CoverageAnalysis]: Checked inductivity of 421 backedges. 86 proven. 155 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-17 18:18:16,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256041438] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:16,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:16,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 19 [2024-09-17 18:18:16,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658825652] [2024-09-17 18:18:16,600 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:16,600 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 18:18:16,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:16,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 18:18:16,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-09-17 18:18:16,601 INFO L87 Difference]: Start difference. First operand 122 states and 135 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:18:16,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:16,825 INFO L93 Difference]: Finished difference Result 135 states and 149 transitions. [2024-09-17 18:18:16,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 18:18:16,826 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) Word has length 97 [2024-09-17 18:18:16,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:16,827 INFO L225 Difference]: With dead ends: 135 [2024-09-17 18:18:16,827 INFO L226 Difference]: Without dead ends: 133 [2024-09-17 18:18:16,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 200 SyntacticMatches, 24 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:18:16,828 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 26 mSDsluCounter, 250 mSDsCounter, 0 mSdLazyCounter, 245 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:16,828 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 287 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 245 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:18:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-09-17 18:18:16,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 129. [2024-09-17 18:18:16,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 102 states have internal predecessors, (115), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:16,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 142 transitions. [2024-09-17 18:18:16,906 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 142 transitions. Word has length 97 [2024-09-17 18:18:16,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:16,906 INFO L474 AbstractCegarLoop]: Abstraction has 129 states and 142 transitions. [2024-09-17 18:18:16,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 12 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:18:16,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:16,906 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 142 transitions. [2024-09-17 18:18:16,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:16,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:16,907 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:16,923 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2024-09-17 18:18:17,111 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-17 18:18:17,112 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:17,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:17,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1261524137, now seen corresponding path program 21 times [2024-09-17 18:18:17,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:17,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814891612] [2024-09-17 18:18:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:17,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:17,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:17,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:17,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:17,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:17,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:17,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:17,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:17,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:17,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:17,516 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:17,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814891612] [2024-09-17 18:18:17,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814891612] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281474931] [2024-09-17 18:18:17,517 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:18:17,517 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:17,517 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:17,519 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:17,520 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-17 18:18:17,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-17 18:18:17,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:17,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:17,581 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:18,297 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:18,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:18,672 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:18,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281474931] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:18,672 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:18,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 57 [2024-09-17 18:18:18,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097722203] [2024-09-17 18:18:18,672 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:18,673 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-17 18:18:18,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:18,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-17 18:18:18,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=609, Invalid=2583, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:18:18,674 INFO L87 Difference]: Start difference. First operand 129 states and 142 transitions. Second operand has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:19,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:19,084 INFO L93 Difference]: Finished difference Result 221 states and 259 transitions. [2024-09-17 18:18:19,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:19,085 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:19,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:19,087 INFO L225 Difference]: With dead ends: 221 [2024-09-17 18:18:19,087 INFO L226 Difference]: Without dead ends: 177 [2024-09-17 18:18:19,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 181 SyntacticMatches, 24 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2526 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=2689, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:18:19,088 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 290 mSDsCounter, 0 mSdLazyCounter, 484 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:19,088 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 325 Invalid, 484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 484 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:19,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-17 18:18:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 130. [2024-09-17 18:18:19,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:19,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:19,180 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:19,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:19,180 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:19,181 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6491228070175439) internal successors, (94), 57 states have internal predecessors, (94), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:19,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:19,181 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:19,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:19,182 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:19,182 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:19,198 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:19,385 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-17 18:18:19,386 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:19,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:19,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1723474390, now seen corresponding path program 46 times [2024-09-17 18:18:19,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:19,387 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36928800] [2024-09-17 18:18:19,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:19,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:19,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:19,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:19,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:19,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,732 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:19,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:19,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,734 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:19,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,736 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:19,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:19,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:19,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:19,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:19,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:19,743 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:19,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36928800] [2024-09-17 18:18:19,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36928800] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:19,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402045107] [2024-09-17 18:18:19,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:19,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:19,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:19,746 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:19,747 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-17 18:18:19,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:19,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:19,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:19,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:20,474 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:20,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:20,772 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:20,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402045107] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:20,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:20,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 56 [2024-09-17 18:18:20,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004184304] [2024-09-17 18:18:20,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:20,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-17 18:18:20,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:20,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-17 18:18:20,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=572, Invalid=2508, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:18:20,774 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:21,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:21,237 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-17 18:18:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:21,237 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:21,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:21,239 INFO L225 Difference]: With dead ends: 231 [2024-09-17 18:18:21,239 INFO L226 Difference]: Without dead ends: 187 [2024-09-17 18:18:21,240 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 182 SyntacticMatches, 24 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=580, Invalid=2612, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:18:21,240 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 568 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 568 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:21,240 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 372 Invalid, 568 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 568 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:21,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-17 18:18:21,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-17 18:18:21,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:21,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:21,328 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:21,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:21,328 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:21,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6607142857142858) internal successors, (93), 56 states have internal predecessors, (93), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:21,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:21,329 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:21,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:21,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:21,330 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:21,344 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:21,533 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:21,534 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:21,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:21,535 INFO L85 PathProgramCache]: Analyzing trace with hash -396992649, now seen corresponding path program 47 times [2024-09-17 18:18:21,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:21,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428392682] [2024-09-17 18:18:21,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:21,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:21,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:21,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:21,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:21,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:21,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:21,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428392682] [2024-09-17 18:18:21,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1428392682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:21,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895706607] [2024-09-17 18:18:21,894 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:21,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:21,894 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:21,896 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:21,901 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-17 18:18:21,989 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 18:18:21,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:21,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:21,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:22,591 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:22,887 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:22,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895706607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:22,888 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:22,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 55 [2024-09-17 18:18:22,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494738653] [2024-09-17 18:18:22,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:22,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-17 18:18:22,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:22,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-17 18:18:22,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2431, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:18:22,890 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:23,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:23,410 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-17 18:18:23,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:23,410 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:23,412 INFO L225 Difference]: With dead ends: 239 [2024-09-17 18:18:23,413 INFO L226 Difference]: Without dead ends: 195 [2024-09-17 18:18:23,413 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 183 SyntacticMatches, 24 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=2533, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:18:23,414 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:23,414 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 356 Invalid, 482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:23,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-17 18:18:23,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-17 18:18:23,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:23,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:23,513 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:23,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:23,513 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:23,513 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.6727272727272726) internal successors, (92), 55 states have internal predecessors, (92), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:23,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:23,514 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:23,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:23,514 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:23,514 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:23,533 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-09-17 18:18:23,715 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:23,716 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:23,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:23,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1197173174, now seen corresponding path program 48 times [2024-09-17 18:18:23,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:23,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014274975] [2024-09-17 18:18:23,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:23,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:23,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:24,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:24,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:24,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:24,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:24,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:24,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:24,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:24,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:24,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:24,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:24,294 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:24,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014274975] [2024-09-17 18:18:24,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014274975] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:24,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265889404] [2024-09-17 18:18:24,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:18:24,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:24,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:24,297 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:24,300 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-17 18:18:24,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-17 18:18:24,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:24,363 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:24,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:25,320 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:25,320 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:25,648 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:25,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265889404] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:25,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:25,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 54 [2024-09-17 18:18:25,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215984546] [2024-09-17 18:18:25,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:25,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-17 18:18:25,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:25,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-17 18:18:25,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=510, Invalid=2352, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:18:25,651 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:26,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:26,232 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-17 18:18:26,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:26,232 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:26,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:26,234 INFO L225 Difference]: With dead ends: 245 [2024-09-17 18:18:26,234 INFO L226 Difference]: Without dead ends: 201 [2024-09-17 18:18:26,235 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 184 SyntacticMatches, 24 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=518, Invalid=2452, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:18:26,236 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 429 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:26,236 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 429 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:26,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-17 18:18:26,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-17 18:18:26,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:26,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:26,350 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:26,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:26,351 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:26,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6851851851851851) internal successors, (91), 54 states have internal predecessors, (91), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:26,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:26,351 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:26,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:26,352 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:26,352 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:26,368 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:26,552 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:26,553 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:26,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:26,553 INFO L85 PathProgramCache]: Analyzing trace with hash -1937990761, now seen corresponding path program 49 times [2024-09-17 18:18:26,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:26,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180717654] [2024-09-17 18:18:26,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:26,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:26,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:26,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:26,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:26,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:26,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:26,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:26,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:26,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:26,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:26,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:26,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:26,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:26,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:26,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180717654] [2024-09-17 18:18:26,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180717654] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:26,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1583591593] [2024-09-17 18:18:26,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:18:26,943 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:26,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:26,944 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:26,945 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-17 18:18:26,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:26,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:27,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:27,616 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:27,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:27,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1583591593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:27,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:27,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 53 [2024-09-17 18:18:27,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915981092] [2024-09-17 18:18:27,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:27,971 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-17 18:18:27,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:27,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-17 18:18:27,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=2271, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:18:27,973 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:28,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:28,596 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-17 18:18:28,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:28,597 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:28,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:28,599 INFO L225 Difference]: With dead ends: 249 [2024-09-17 18:18:28,599 INFO L226 Difference]: Without dead ends: 205 [2024-09-17 18:18:28,599 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 185 SyntacticMatches, 24 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2046 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=493, Invalid=2369, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:18:28,600 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 298 mSDsCounter, 0 mSdLazyCounter, 477 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 477 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 477 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:28,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 333 Invalid, 477 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 477 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:28,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-17 18:18:28,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-17 18:18:28,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:28,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:28,698 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:28,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:28,699 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:28,699 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.6981132075471699) internal successors, (90), 53 states have internal predecessors, (90), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:28,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:28,699 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:28,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:28,700 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:28,700 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:28,717 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:28,904 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:28,905 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:28,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:28,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1701652886, now seen corresponding path program 50 times [2024-09-17 18:18:28,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:28,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814136683] [2024-09-17 18:18:28,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:29,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:29,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:29,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:29,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:29,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:29,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:29,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:29,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:29,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:29,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:29,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:29,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:29,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814136683] [2024-09-17 18:18:29,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814136683] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:29,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670769444] [2024-09-17 18:18:29,291 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:18:29,291 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:29,291 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:29,293 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:29,294 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-17 18:18:29,349 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:18:29,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:29,351 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:29,353 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:29,945 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:29,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:30,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670769444] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:30,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:30,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 52 [2024-09-17 18:18:30,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826119536] [2024-09-17 18:18:30,295 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:30,295 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-17 18:18:30,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:30,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-17 18:18:30,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=464, Invalid=2188, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:18:30,297 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:30,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:30,933 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-17 18:18:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:30,933 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:30,935 INFO L225 Difference]: With dead ends: 251 [2024-09-17 18:18:30,935 INFO L226 Difference]: Without dead ends: 207 [2024-09-17 18:18:30,936 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 186 SyntacticMatches, 24 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1922 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=472, Invalid=2284, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:18:30,936 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 392 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:30,936 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 277 Invalid, 392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 392 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:30,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-17 18:18:31,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-17 18:18:31,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:31,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:31,040 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:31,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:31,040 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:31,040 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7115384615384615) internal successors, (89), 52 states have internal predecessors, (89), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:31,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:31,040 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:31,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:31,041 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:31,041 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:31,057 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:31,241 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:31,242 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:31,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:31,242 INFO L85 PathProgramCache]: Analyzing trace with hash -951885897, now seen corresponding path program 51 times [2024-09-17 18:18:31,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:31,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045442146] [2024-09-17 18:18:31,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:31,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:31,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:31,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:31,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:31,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:31,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:31,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:31,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:31,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:31,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:31,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:31,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:31,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:31,635 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 178 proven. 67 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:31,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045442146] [2024-09-17 18:18:31,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045442146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:31,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359912036] [2024-09-17 18:18:31,636 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:18:31,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:31,636 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:31,638 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:31,639 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-17 18:18:31,705 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2024-09-17 18:18:31,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:31,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:31,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:32,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 209 proven. 36 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:32,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359912036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:32,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:32,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 51 [2024-09-17 18:18:32,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935499626] [2024-09-17 18:18:32,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:32,532 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-17 18:18:32,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:32,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-17 18:18:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=2103, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:18:32,533 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:33,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:33,093 INFO L93 Difference]: Finished difference Result 251 states and 289 transitions. [2024-09-17 18:18:33,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:33,093 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:33,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:33,095 INFO L225 Difference]: With dead ends: 251 [2024-09-17 18:18:33,095 INFO L226 Difference]: Without dead ends: 207 [2024-09-17 18:18:33,096 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 187 SyntacticMatches, 24 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=455, Invalid=2197, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:18:33,096 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 228 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:33,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 267 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:18:33,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2024-09-17 18:18:33,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 130. [2024-09-17 18:18:33,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:33,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:33,216 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:33,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:33,216 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:33,216 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7254901960784315) internal successors, (88), 51 states have internal predecessors, (88), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:33,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:33,217 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:33,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:33,217 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:33,217 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 7, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:33,235 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:33,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:33,423 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:33,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:33,423 INFO L85 PathProgramCache]: Analyzing trace with hash -760389258, now seen corresponding path program 52 times [2024-09-17 18:18:33,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:33,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946949839] [2024-09-17 18:18:33,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:33,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:33,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:33,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:33,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:33,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:33,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:33,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:33,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:33,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:33,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:33,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:33,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:33,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:33,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 178 proven. 69 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:33,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:33,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946949839] [2024-09-17 18:18:33,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946949839] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:33,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573388841] [2024-09-17 18:18:33,821 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:33,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:33,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:33,826 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:33,831 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-17 18:18:33,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:33,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:33,931 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:33,933 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:34,496 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:34,496 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:34,851 INFO L134 CoverageAnalysis]: Checked inductivity of 467 backedges. 209 proven. 38 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:34,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573388841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:34,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:34,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 50 [2024-09-17 18:18:34,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655394096] [2024-09-17 18:18:34,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:34,852 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-17 18:18:34,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:34,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-17 18:18:34,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=434, Invalid=2016, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:18:34,853 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:35,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:35,561 INFO L93 Difference]: Finished difference Result 249 states and 287 transitions. [2024-09-17 18:18:35,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:35,562 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:35,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:35,564 INFO L225 Difference]: With dead ends: 249 [2024-09-17 18:18:35,564 INFO L226 Difference]: Without dead ends: 205 [2024-09-17 18:18:35,564 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 188 SyntacticMatches, 24 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1683 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=442, Invalid=2108, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:18:35,564 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:35,565 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:35,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-17 18:18:35,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 130. [2024-09-17 18:18:35,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:35,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:35,665 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:35,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:35,665 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:35,666 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.74) internal successors, (87), 50 states have internal predecessors, (87), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:35,666 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:35,666 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:35,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:35,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:35,667 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:35,683 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:35,871 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:35,872 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:35,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:35,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1462545367, now seen corresponding path program 53 times [2024-09-17 18:18:35,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:35,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988767566] [2024-09-17 18:18:35,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:35,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:35,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:36,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:36,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,241 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:36,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:36,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:36,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:36,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:36,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,247 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:36,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:36,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,250 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:36,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:36,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:36,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:36,254 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 178 proven. 73 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:36,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988767566] [2024-09-17 18:18:36,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988767566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:36,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150205872] [2024-09-17 18:18:36,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:36,255 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:36,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:36,257 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:36,258 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-17 18:18:36,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 18:18:36,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:36,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:36,321 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:36,868 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:36,869 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:37,213 INFO L134 CoverageAnalysis]: Checked inductivity of 471 backedges. 209 proven. 42 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:37,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150205872] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:37,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:37,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 49 [2024-09-17 18:18:37,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026766073] [2024-09-17 18:18:37,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:37,214 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-17 18:18:37,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:37,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-17 18:18:37,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=425, Invalid=1927, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:18:37,216 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:37,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:37,869 INFO L93 Difference]: Finished difference Result 245 states and 283 transitions. [2024-09-17 18:18:37,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:37,870 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:37,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:37,872 INFO L225 Difference]: With dead ends: 245 [2024-09-17 18:18:37,872 INFO L226 Difference]: Without dead ends: 201 [2024-09-17 18:18:37,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 189 SyntacticMatches, 24 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=433, Invalid=2017, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:18:37,873 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 358 mSDsCounter, 0 mSdLazyCounter, 475 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 475 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 475 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:37,873 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 395 Invalid, 475 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 475 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:37,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-17 18:18:37,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 130. [2024-09-17 18:18:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:37,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:37,977 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:37,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:37,977 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:37,977 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7551020408163265) internal successors, (86), 49 states have internal predecessors, (86), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:37,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:37,977 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:37,978 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:37,978 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:37,996 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:38,182 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:38,183 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:38,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:38,183 INFO L85 PathProgramCache]: Analyzing trace with hash -128315050, now seen corresponding path program 54 times [2024-09-17 18:18:38,183 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:38,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045275797] [2024-09-17 18:18:38,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:38,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:38,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:38,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:38,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:38,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:38,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:38,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:38,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,582 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:38,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:38,583 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 178 proven. 79 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:38,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:38,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045275797] [2024-09-17 18:18:38,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045275797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:38,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800056562] [2024-09-17 18:18:38,584 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:18:38,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:38,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:38,586 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:38,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-17 18:18:38,653 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2024-09-17 18:18:38,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:38,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:38,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:39,200 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:39,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:39,548 INFO L134 CoverageAnalysis]: Checked inductivity of 477 backedges. 209 proven. 48 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:39,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800056562] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:39,548 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:39,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 48 [2024-09-17 18:18:39,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255722701] [2024-09-17 18:18:39,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:39,549 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-17 18:18:39,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:39,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-17 18:18:39,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=420, Invalid=1836, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:18:39,550 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:40,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:40,133 INFO L93 Difference]: Finished difference Result 239 states and 277 transitions. [2024-09-17 18:18:40,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:40,134 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:40,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:40,136 INFO L225 Difference]: With dead ends: 239 [2024-09-17 18:18:40,136 INFO L226 Difference]: Without dead ends: 195 [2024-09-17 18:18:40,136 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 190 SyntacticMatches, 24 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1456 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=428, Invalid=1924, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:18:40,137 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 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 [2024-09-17 18:18:40,137 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:40,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2024-09-17 18:18:40,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 130. [2024-09-17 18:18:40,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:40,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:40,240 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:40,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:40,240 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:40,240 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.7708333333333333) internal successors, (85), 48 states have internal predecessors, (85), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:40,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:40,240 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:40,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:40,241 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:40,241 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:40,258 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:40,441 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2024-09-17 18:18:40,442 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:40,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:40,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1288011785, now seen corresponding path program 55 times [2024-09-17 18:18:40,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:40,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312533828] [2024-09-17 18:18:40,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:40,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:40,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:40,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:40,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:40,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:40,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:40,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:40,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:40,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:40,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,868 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 178 proven. 87 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:40,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312533828] [2024-09-17 18:18:40,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312533828] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:40,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202575172] [2024-09-17 18:18:40,869 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:18:40,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:40,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:40,871 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:40,874 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-17 18:18:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:40,930 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:40,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:41,461 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:41,461 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:41,821 INFO L134 CoverageAnalysis]: Checked inductivity of 485 backedges. 209 proven. 56 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:41,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202575172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:41,821 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:41,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2024-09-17 18:18:41,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578850176] [2024-09-17 18:18:41,821 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:41,822 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-17 18:18:41,822 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:41,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-17 18:18:41,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1743, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:18:41,823 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:42,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:42,311 INFO L93 Difference]: Finished difference Result 231 states and 269 transitions. [2024-09-17 18:18:42,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:42,312 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:42,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:42,314 INFO L225 Difference]: With dead ends: 231 [2024-09-17 18:18:42,314 INFO L226 Difference]: Without dead ends: 187 [2024-09-17 18:18:42,314 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 191 SyntacticMatches, 24 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1347 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=427, Invalid=1829, Unknown=0, NotChecked=0, Total=2256 [2024-09-17 18:18:42,315 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 333 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 256 SdHoareTripleChecker+Invalid, 333 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:42,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 256 Invalid, 333 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 333 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2024-09-17 18:18:42,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 130. [2024-09-17 18:18:42,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 102 states have (on average 1.1372549019607843) internal successors, (116), 103 states have internal predecessors, (116), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:42,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2024-09-17 18:18:42,440 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 104 [2024-09-17 18:18:42,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:42,440 INFO L474 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2024-09-17 18:18:42,440 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.7872340425531914) internal successors, (84), 47 states have internal predecessors, (84), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:42,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:42,440 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2024-09-17 18:18:42,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-17 18:18:42,441 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:42,441 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:42,458 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:42,641 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2024-09-17 18:18:42,642 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:42,642 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:42,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1999714614, now seen corresponding path program 11 times [2024-09-17 18:18:42,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:42,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408827795] [2024-09-17 18:18:42,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:42,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:42,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,020 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-17 18:18:43,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-17 18:18:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,025 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 37 [2024-09-17 18:18:43,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2024-09-17 18:18:43,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-17 18:18:43,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-17 18:18:43,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-17 18:18:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2024-09-17 18:18:43,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-17 18:18:43,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2024-09-17 18:18:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,034 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-17 18:18:43,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 178 proven. 97 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:43,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408827795] [2024-09-17 18:18:43,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408827795] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:43,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676886638] [2024-09-17 18:18:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:43,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:43,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:43,038 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:43,039 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-17 18:18:43,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 18:18:43,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:43,104 INFO L262 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 18:18:43,105 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:43,616 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:43,617 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:43,977 INFO L134 CoverageAnalysis]: Checked inductivity of 495 backedges. 209 proven. 66 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:43,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [676886638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:43,977 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:43,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2024-09-17 18:18:43,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587231482] [2024-09-17 18:18:43,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:43,978 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-17 18:18:43,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:43,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-17 18:18:43,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=422, Invalid=1648, Unknown=0, NotChecked=0, Total=2070 [2024-09-17 18:18:43,980 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:44,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:44,513 INFO L93 Difference]: Finished difference Result 224 states and 263 transitions. [2024-09-17 18:18:44,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-17 18:18:44,513 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) Word has length 104 [2024-09-17 18:18:44,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:44,515 INFO L225 Difference]: With dead ends: 224 [2024-09-17 18:18:44,515 INFO L226 Difference]: Without dead ends: 180 [2024-09-17 18:18:44,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 192 SyntacticMatches, 24 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1231 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=430, Invalid=1732, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 18:18:44,516 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 6 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 518 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:44,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 518 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:44,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-17 18:18:44,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 132. [2024-09-17 18:18:44,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 104 states have (on average 1.1442307692307692) internal successors, (119), 105 states have internal predecessors, (119), 14 states have call successors, (14), 14 states have call predecessors, (14), 13 states have return successors, (13), 12 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:18:44,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 146 transitions. [2024-09-17 18:18:44,650 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 146 transitions. Word has length 104 [2024-09-17 18:18:44,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:44,650 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 146 transitions. [2024-09-17 18:18:44,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.8043478260869565) internal successors, (83), 46 states have internal predecessors, (83), 25 states have call successors, (26), 2 states have call predecessors, (26), 1 states have return successors, (24), 24 states have call predecessors, (24), 24 states have call successors, (24) [2024-09-17 18:18:44,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:44,651 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 146 transitions. [2024-09-17 18:18:44,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-17 18:18:44,652 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:44,652 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:44,670 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-09-17 18:18:44,855 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:44,856 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:44,856 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:44,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1609644226, now seen corresponding path program 22 times [2024-09-17 18:18:44,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:44,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163047518] [2024-09-17 18:18:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:44,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:44,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,078 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:45,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:45,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,081 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:45,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:45,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:45,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:45,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:45,091 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 88 proven. 199 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:45,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163047518] [2024-09-17 18:18:45,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163047518] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:45,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17524835] [2024-09-17 18:18:45,091 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:45,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:45,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:45,093 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:45,094 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-17 18:18:45,154 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:45,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:45,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:45,161 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:45,244 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:45,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:45,482 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 100 proven. 187 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-17 18:18:45,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17524835] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:45,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:45,483 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 20 [2024-09-17 18:18:45,483 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657055377] [2024-09-17 18:18:45,483 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:45,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-17 18:18:45,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:45,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-17 18:18:45,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=262, Unknown=0, NotChecked=0, Total=380 [2024-09-17 18:18:45,484 INFO L87 Difference]: Start difference. First operand 132 states and 146 transitions. Second operand has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:45,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:45,729 INFO L93 Difference]: Finished difference Result 145 states and 160 transitions. [2024-09-17 18:18:45,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 18:18:45,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Word has length 105 [2024-09-17 18:18:45,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:45,731 INFO L225 Difference]: With dead ends: 145 [2024-09-17 18:18:45,731 INFO L226 Difference]: Without dead ends: 143 [2024-09-17 18:18:45,732 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 219 SyntacticMatches, 24 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=296, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:18:45,732 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 31 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 210 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 223 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 210 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:45,732 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 245 Invalid, 223 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 210 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:18:45,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2024-09-17 18:18:45,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 139. [2024-09-17 18:18:45,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 110 states have internal predecessors, (124), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:45,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 153 transitions. [2024-09-17 18:18:45,842 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 153 transitions. Word has length 105 [2024-09-17 18:18:45,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:45,842 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 153 transitions. [2024-09-17 18:18:45,842 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.85) internal successors, (57), 18 states have internal predecessors, (57), 13 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-17 18:18:45,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:45,842 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 153 transitions. [2024-09-17 18:18:45,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:45,843 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:45,843 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:45,859 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:46,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:46,044 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:46,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:46,044 INFO L85 PathProgramCache]: Analyzing trace with hash -367943082, now seen corresponding path program 23 times [2024-09-17 18:18:46,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:46,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17335541] [2024-09-17 18:18:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:46,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:46,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:46,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:46,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:46,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:46,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:46,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:46,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:46,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:46,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:46,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:46,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:46,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:46,468 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:46,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17335541] [2024-09-17 18:18:46,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17335541] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:46,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660192109] [2024-09-17 18:18:46,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:46,468 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:46,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:46,470 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:46,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-17 18:18:46,538 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-17 18:18:46,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:46,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:46,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:47,195 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:47,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:47,530 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:47,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660192109] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:47,531 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:47,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 61 [2024-09-17 18:18:47,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906131170] [2024-09-17 18:18:47,531 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:47,532 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-17 18:18:47,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:47,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-17 18:18:47,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=697, Invalid=2963, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:18:47,533 INFO L87 Difference]: Start difference. First operand 139 states and 153 transitions. Second operand has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:48,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:48,027 INFO L93 Difference]: Finished difference Result 238 states and 279 transitions. [2024-09-17 18:18:48,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:18:48,028 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:18:48,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:48,029 INFO L225 Difference]: With dead ends: 238 [2024-09-17 18:18:48,030 INFO L226 Difference]: Without dead ends: 191 [2024-09-17 18:18:48,031 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 195 SyntacticMatches, 26 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2939 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=705, Invalid=3077, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:18:48,031 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 406 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:48,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 406 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:48,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-17 18:18:48,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 140. [2024-09-17 18:18:48,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:18:48,151 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:18:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:48,151 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:18:48,152 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.639344262295082) internal successors, (100), 61 states have internal predecessors, (100), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:48,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:48,152 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:18:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:48,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:48,153 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:48,169 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:48,356 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:48,357 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:48,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:48,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1709561387, now seen corresponding path program 56 times [2024-09-17 18:18:48,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:48,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782426367] [2024-09-17 18:18:48,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:48,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:48,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:48,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:48,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:48,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:48,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,763 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:48,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:48,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:48,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,768 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:48,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:48,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:48,772 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:48,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782426367] [2024-09-17 18:18:48,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782426367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:48,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [799360682] [2024-09-17 18:18:48,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:18:48,773 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:48,773 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:48,775 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:48,776 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-17 18:18:48,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:18:48,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:48,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:48,839 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:49,469 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:49,469 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:49,816 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:49,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [799360682] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:49,817 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:49,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 60 [2024-09-17 18:18:49,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [392870768] [2024-09-17 18:18:49,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:49,818 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-17 18:18:49,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:49,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-17 18:18:49,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=657, Invalid=2883, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:18:49,820 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:50,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:50,415 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-17 18:18:50,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:18:50,416 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:18:50,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:50,418 INFO L225 Difference]: With dead ends: 249 [2024-09-17 18:18:50,418 INFO L226 Difference]: Without dead ends: 202 [2024-09-17 18:18:50,418 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 196 SyntacticMatches, 26 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2842 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=665, Invalid=2995, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:18:50,418 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 301 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 342 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:50,418 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 342 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:50,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-17 18:18:50,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-17 18:18:50,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:50,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:18:50,546 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:18:50,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:50,546 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:18:50,546 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.65) internal successors, (99), 60 states have internal predecessors, (99), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:50,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:18:50,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:50,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:50,547 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:50,564 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-09-17 18:18:50,751 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:50,752 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:50,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:50,752 INFO L85 PathProgramCache]: Analyzing trace with hash 1295201910, now seen corresponding path program 57 times [2024-09-17 18:18:50,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:50,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445878566] [2024-09-17 18:18:50,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:50,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:50,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:51,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:51,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:51,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:51,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:51,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,199 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:51,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:51,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,202 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:51,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:51,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:51,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:51,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:51,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:51,210 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:51,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445878566] [2024-09-17 18:18:51,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445878566] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:51,210 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394572312] [2024-09-17 18:18:51,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:18:51,210 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:51,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:51,212 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:51,214 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-17 18:18:51,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-17 18:18:51,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:51,283 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:51,285 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:51,895 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:51,895 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:52,228 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:52,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394572312] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:52,229 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:52,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 59 [2024-09-17 18:18:52,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145940865] [2024-09-17 18:18:52,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:52,229 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-17 18:18:52,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:52,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-17 18:18:52,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2801, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:18:52,231 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:52,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:52,904 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-17 18:18:52,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:18:52,905 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:18:52,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:52,907 INFO L225 Difference]: With dead ends: 258 [2024-09-17 18:18:52,907 INFO L226 Difference]: Without dead ends: 211 [2024-09-17 18:18:52,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 197 SyntacticMatches, 26 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2698 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=629, Invalid=2911, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:18:52,908 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 578 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 578 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:52,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 394 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 578 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:52,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-17 18:18:53,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-17 18:18:53,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:53,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:18:53,050 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:18:53,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:53,050 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:18:53,050 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.6610169491525424) internal successors, (98), 59 states have internal predecessors, (98), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:53,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:53,051 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:18:53,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:53,051 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:53,051 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:53,069 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-09-17 18:18:53,255 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:53,256 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:53,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:53,256 INFO L85 PathProgramCache]: Analyzing trace with hash 6656437, now seen corresponding path program 58 times [2024-09-17 18:18:53,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:53,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260479174] [2024-09-17 18:18:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:53,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:53,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:53,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:53,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:53,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:53,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:53,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:53,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:53,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:53,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:53,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:53,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:53,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:53,675 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:53,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:53,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260479174] [2024-09-17 18:18:53,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260479174] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:53,676 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966652561] [2024-09-17 18:18:53,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:18:53,676 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:53,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:53,678 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:53,679 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-17 18:18:53,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:18:53,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:53,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:53,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:54,388 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:54,389 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:54,843 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:54,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966652561] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:54,844 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:54,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 58 [2024-09-17 18:18:54,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610236062] [2024-09-17 18:18:54,844 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:54,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-17 18:18:54,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:54,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-17 18:18:54,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=589, Invalid=2717, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:18:54,846 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:55,896 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-17 18:18:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:18:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:18:55,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:55,899 INFO L225 Difference]: With dead ends: 265 [2024-09-17 18:18:55,899 INFO L226 Difference]: Without dead ends: 218 [2024-09-17 18:18:55,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 198 SyntacticMatches, 26 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=597, Invalid=2825, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:18:55,900 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 311 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:55,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 350 Invalid, 599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:18:55,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-17 18:18:56,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-17 18:18:56,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:18:56,035 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:18:56,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:56,035 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:18:56,035 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.6724137931034482) internal successors, (97), 58 states have internal predecessors, (97), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:56,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:56,035 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:18:56,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:56,036 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:56,036 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:56,051 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2024-09-17 18:18:56,236 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:56,238 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:56,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:56,238 INFO L85 PathProgramCache]: Analyzing trace with hash -34909546, now seen corresponding path program 59 times [2024-09-17 18:18:56,238 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:56,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326997504] [2024-09-17 18:18:56,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:56,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:56,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:56,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:56,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:56,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:56,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:56,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:56,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:56,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:56,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:56,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:56,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:56,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:56,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:56,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326997504] [2024-09-17 18:18:56,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326997504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:56,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417142543] [2024-09-17 18:18:56,688 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:18:56,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:56,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:56,689 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:56,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-17 18:18:56,755 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-17 18:18:56,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:56,757 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:56,758 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:18:57,452 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:57,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:18:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:57,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417142543] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:18:57,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:18:57,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 57 [2024-09-17 18:18:57,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110688011] [2024-09-17 18:18:57,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:18:57,862 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-17 18:18:57,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:18:57,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-17 18:18:57,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=2631, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:18:57,863 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:58,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:18:58,718 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-17 18:18:58,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:18:58,719 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:18:58,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:18:58,721 INFO L225 Difference]: With dead ends: 270 [2024-09-17 18:18:58,721 INFO L226 Difference]: Without dead ends: 223 [2024-09-17 18:18:58,722 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 199 SyntacticMatches, 26 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2419 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=569, Invalid=2737, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:18:58,722 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 307 SdHoareTripleChecker+Invalid, 479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:18:58,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 307 Invalid, 479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:18:58,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-17 18:18:58,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-17 18:18:58,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:18:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:18:58,877 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:18:58,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:18:58,877 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:18:58,877 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6842105263157894) internal successors, (96), 57 states have internal predecessors, (96), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:18:58,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:58,878 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:18:58,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:18:58,878 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:18:58,878 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:18:58,894 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2024-09-17 18:18:59,082 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:59,083 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:18:59,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:18:59,083 INFO L85 PathProgramCache]: Analyzing trace with hash 1210675605, now seen corresponding path program 60 times [2024-09-17 18:18:59,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:18:59,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540441009] [2024-09-17 18:18:59,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:18:59,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:18:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:18:59,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:18:59,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:18:59,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:18:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:18:59,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:18:59,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:18:59,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,516 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:18:59,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:18:59,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:18:59,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:18:59,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:18:59,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:18:59,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:18:59,524 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:18:59,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:18:59,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540441009] [2024-09-17 18:18:59,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540441009] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:18:59,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38814519] [2024-09-17 18:18:59,525 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:18:59,525 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:18:59,525 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:18:59,527 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:18:59,528 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-17 18:18:59,596 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 18:18:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:18:59,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:18:59,600 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:00,284 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:00,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:00,674 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:00,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [38814519] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:00,674 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:00,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 56 [2024-09-17 18:19:00,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046882750] [2024-09-17 18:19:00,674 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:00,674 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-17 18:19:00,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:00,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-17 18:19:00,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=537, Invalid=2543, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:19:00,676 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:01,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:01,547 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-17 18:19:01,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:01,548 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:01,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:01,550 INFO L225 Difference]: With dead ends: 273 [2024-09-17 18:19:01,550 INFO L226 Difference]: Without dead ends: 226 [2024-09-17 18:19:01,551 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 200 SyntacticMatches, 26 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=545, Invalid=2647, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:19:01,551 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 463 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:01,551 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 346 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 463 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-17 18:19:01,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-17 18:19:01,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:01,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:01,694 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:01,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:01,694 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:01,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.6964285714285714) internal successors, (95), 56 states have internal predecessors, (95), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:01,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:01,694 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:01,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:01,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:01,695 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:01,713 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:01,899 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:01,900 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:01,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:01,900 INFO L85 PathProgramCache]: Analyzing trace with hash 3929782, now seen corresponding path program 61 times [2024-09-17 18:19:01,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:01,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569899760] [2024-09-17 18:19:01,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:01,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:01,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,343 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:02,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:02,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:02,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:02,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:02,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:02,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:02,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:02,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:02,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,359 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 212 proven. 76 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:02,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:02,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569899760] [2024-09-17 18:19:02,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569899760] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:02,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987378489] [2024-09-17 18:19:02,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:19:02,360 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:02,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:02,365 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:02,367 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-17 18:19:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:02,437 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:02,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:03,044 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:03,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:03,417 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 246 proven. 42 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:03,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987378489] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:03,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:03,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 55 [2024-09-17 18:19:03,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780844807] [2024-09-17 18:19:03,419 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:03,419 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-17 18:19:03,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:03,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-17 18:19:03,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=517, Invalid=2453, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:19:03,421 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:04,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:04,303 INFO L93 Difference]: Finished difference Result 274 states and 315 transitions. [2024-09-17 18:19:04,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:04,303 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:04,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:04,306 INFO L225 Difference]: With dead ends: 274 [2024-09-17 18:19:04,306 INFO L226 Difference]: Without dead ends: 227 [2024-09-17 18:19:04,313 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 201 SyntacticMatches, 26 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2152 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=525, Invalid=2555, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:19:04,317 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 264 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:04,318 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:04,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-17 18:19:04,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 140. [2024-09-17 18:19:04,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:04,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:04,492 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:04,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:04,492 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:04,492 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.709090909090909) internal successors, (94), 55 states have internal predecessors, (94), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:04,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:04,493 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:04,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:04,493 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:04,494 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:04,512 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:04,697 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-17 18:19:04,698 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:04,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:04,698 INFO L85 PathProgramCache]: Analyzing trace with hash -450639499, now seen corresponding path program 62 times [2024-09-17 18:19:04,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:04,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346425779] [2024-09-17 18:19:04,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:04,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:04,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:05,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:05,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:05,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:05,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 212 proven. 77 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:05,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346425779] [2024-09-17 18:19:05,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346425779] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:05,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28129975] [2024-09-17 18:19:05,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:19:05,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:05,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:05,152 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:05,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-17 18:19:05,209 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:19:05,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:05,211 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:05,213 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:05,867 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:05,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:06,254 INFO L134 CoverageAnalysis]: Checked inductivity of 553 backedges. 246 proven. 43 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:06,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28129975] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:06,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:06,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 54 [2024-09-17 18:19:06,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415738766] [2024-09-17 18:19:06,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:06,255 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-17 18:19:06,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-17 18:19:06,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=501, Invalid=2361, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:19:06,256 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:07,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:07,218 INFO L93 Difference]: Finished difference Result 273 states and 314 transitions. [2024-09-17 18:19:07,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:07,219 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:07,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:07,221 INFO L225 Difference]: With dead ends: 273 [2024-09-17 18:19:07,221 INFO L226 Difference]: Without dead ends: 226 [2024-09-17 18:19:07,221 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 202 SyntacticMatches, 26 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2023 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=509, Invalid=2461, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:19:07,222 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 625 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 475 SdHoareTripleChecker+Invalid, 625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:07,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 475 Invalid, 625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 625 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2024-09-17 18:19:07,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 140. [2024-09-17 18:19:07,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:07,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:07,364 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:07,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:07,364 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:07,365 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7222222222222223) internal successors, (93), 54 states have internal predecessors, (93), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:07,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:07,365 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:07,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:07,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:07,366 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:07,381 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:07,569 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2024-09-17 18:19:07,569 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:07,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:07,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1890001622, now seen corresponding path program 63 times [2024-09-17 18:19:07,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:07,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159323690] [2024-09-17 18:19:07,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:07,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:08,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:08,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:08,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:08,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:08,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:08,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:08,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:08,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:08,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:08,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:08,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:08,019 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 212 proven. 80 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:08,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159323690] [2024-09-17 18:19:08,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159323690] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [554627593] [2024-09-17 18:19:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:19:08,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:08,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:08,021 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:08,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-17 18:19:08,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2024-09-17 18:19:08,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:08,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:08,095 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:08,712 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:08,712 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:09,100 INFO L134 CoverageAnalysis]: Checked inductivity of 556 backedges. 246 proven. 46 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:09,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [554627593] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:09,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:09,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 53 [2024-09-17 18:19:09,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845214552] [2024-09-17 18:19:09,101 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:09,101 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-17 18:19:09,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:09,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-17 18:19:09,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:19:09,102 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:09,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:09,986 INFO L93 Difference]: Finished difference Result 270 states and 311 transitions. [2024-09-17 18:19:09,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:09,987 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:09,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:09,989 INFO L225 Difference]: With dead ends: 270 [2024-09-17 18:19:09,990 INFO L226 Difference]: Without dead ends: 223 [2024-09-17 18:19:09,990 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 203 SyntacticMatches, 26 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=497, Invalid=2365, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:19:09,990 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:09,991 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:09,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2024-09-17 18:19:10,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 140. [2024-09-17 18:19:10,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:10,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:10,158 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:10,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:10,159 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:10,159 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7358490566037736) internal successors, (92), 53 states have internal predecessors, (92), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:10,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:10,159 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:10,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:10,160 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:10,160 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:10,175 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:10,360 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:10,361 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:10,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:10,361 INFO L85 PathProgramCache]: Analyzing trace with hash 580032853, now seen corresponding path program 64 times [2024-09-17 18:19:10,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:10,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143058868] [2024-09-17 18:19:10,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:10,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:10,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:10,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:10,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:10,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:10,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:10,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:10,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:10,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:10,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:10,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:10,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:10,801 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 212 proven. 85 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:10,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143058868] [2024-09-17 18:19:10,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143058868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:10,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1386742373] [2024-09-17 18:19:10,801 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:19:10,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:10,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:10,803 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:10,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-17 18:19:10,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:19:10,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:10,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:10,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:11,465 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 246 proven. 51 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:11,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1386742373] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:11,847 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:11,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 52 [2024-09-17 18:19:11,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600476770] [2024-09-17 18:19:11,848 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:11,848 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-17 18:19:11,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:11,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-17 18:19:11,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=2171, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:19:11,849 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:12,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:12,641 INFO L93 Difference]: Finished difference Result 265 states and 306 transitions. [2024-09-17 18:19:12,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:12,641 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:12,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:12,644 INFO L225 Difference]: With dead ends: 265 [2024-09-17 18:19:12,644 INFO L226 Difference]: Without dead ends: 218 [2024-09-17 18:19:12,644 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 204 SyntacticMatches, 26 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1774 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=489, Invalid=2267, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:19:12,644 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 411 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 279 SdHoareTripleChecker+Invalid, 411 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 411 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:12,644 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 279 Invalid, 411 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 411 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:12,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2024-09-17 18:19:12,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 140. [2024-09-17 18:19:12,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:12,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:12,793 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:12,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:12,793 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:12,793 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.75) internal successors, (91), 52 states have internal predecessors, (91), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:12,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:12,794 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:12,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:12,794 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:12,794 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:12,811 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:12,998 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2024-09-17 18:19:12,999 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:12,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:12,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1540434186, now seen corresponding path program 65 times [2024-09-17 18:19:12,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:13,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787933317] [2024-09-17 18:19:13,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:13,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:13,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:13,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:13,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:13,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:13,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:13,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:13,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:13,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:13,462 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 212 proven. 92 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:13,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787933317] [2024-09-17 18:19:13,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787933317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:13,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967315275] [2024-09-17 18:19:13,462 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:19:13,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:13,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:13,465 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:13,466 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-17 18:19:13,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2024-09-17 18:19:13,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:13,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:13,531 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:14,119 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:14,119 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 568 backedges. 246 proven. 58 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967315275] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:14,500 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:14,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 51 [2024-09-17 18:19:14,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580496087] [2024-09-17 18:19:14,500 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:14,500 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2024-09-17 18:19:14,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:14,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2024-09-17 18:19:14,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=2073, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:19:14,502 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:15,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:15,267 INFO L93 Difference]: Finished difference Result 258 states and 299 transitions. [2024-09-17 18:19:15,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:15,268 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:15,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:15,270 INFO L225 Difference]: With dead ends: 258 [2024-09-17 18:19:15,270 INFO L226 Difference]: Without dead ends: 211 [2024-09-17 18:19:15,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 205 SyntacticMatches, 26 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=2167, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:19:15,271 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 299 SdHoareTripleChecker+Invalid, 503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:15,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 299 Invalid, 503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:15,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2024-09-17 18:19:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 140. [2024-09-17 18:19:15,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:15,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:15,420 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:15,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:15,420 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:15,420 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.7647058823529411) internal successors, (90), 51 states have internal predecessors, (90), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:15,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:15,420 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:15,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:15,421 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:15,421 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:15,436 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:15,623 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-17 18:19:15,623 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:15,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:15,624 INFO L85 PathProgramCache]: Analyzing trace with hash 53731637, now seen corresponding path program 66 times [2024-09-17 18:19:15,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:15,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152738451] [2024-09-17 18:19:15,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:15,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:15,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:16,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:16,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:16,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:16,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:16,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:16,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:16,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:16,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:16,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:16,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:16,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 212 proven. 101 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:16,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:16,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152738451] [2024-09-17 18:19:16,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152738451] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:16,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45181509] [2024-09-17 18:19:16,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:19:16,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:16,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:16,070 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:16,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-17 18:19:16,138 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 18:19:16,138 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:16,140 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:16,141 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:16,700 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:16,700 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:17,077 INFO L134 CoverageAnalysis]: Checked inductivity of 577 backedges. 246 proven. 67 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:17,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45181509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:17,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:17,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 50 [2024-09-17 18:19:17,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703866823] [2024-09-17 18:19:17,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:17,078 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-17 18:19:17,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:17,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-17 18:19:17,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=477, Invalid=1973, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:19:17,080 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:17,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:17,730 INFO L93 Difference]: Finished difference Result 249 states and 290 transitions. [2024-09-17 18:19:17,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:17,731 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:17,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:17,733 INFO L225 Difference]: With dead ends: 249 [2024-09-17 18:19:17,733 INFO L226 Difference]: Without dead ends: 202 [2024-09-17 18:19:17,733 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 206 SyntacticMatches, 26 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=485, Invalid=2065, Unknown=0, NotChecked=0, Total=2550 [2024-09-17 18:19:17,733 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:17,733 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 306 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:17,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2024-09-17 18:19:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 140. [2024-09-17 18:19:17,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 110 states have (on average 1.1363636363636365) internal successors, (125), 111 states have internal predecessors, (125), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 154 transitions. [2024-09-17 18:19:17,881 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 154 transitions. Word has length 112 [2024-09-17 18:19:17,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:17,881 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 154 transitions. [2024-09-17 18:19:17,881 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.78) internal successors, (89), 50 states have internal predecessors, (89), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:17,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:17,881 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 154 transitions. [2024-09-17 18:19:17,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2024-09-17 18:19:17,882 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:17,882 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:17,900 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:18,086 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-17 18:19:18,087 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:18,087 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1213534998, now seen corresponding path program 12 times [2024-09-17 18:19:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892370694] [2024-09-17 18:19:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:18,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-17 18:19:18,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-17 18:19:18,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-17 18:19:18,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,535 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-17 18:19:18,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2024-09-17 18:19:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 59 [2024-09-17 18:19:18,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-17 18:19:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 73 [2024-09-17 18:19:18,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-17 18:19:18,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-17 18:19:18,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-17 18:19:18,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 101 [2024-09-17 18:19:18,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:18,547 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 212 proven. 112 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:18,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892370694] [2024-09-17 18:19:18,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892370694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:18,547 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424805293] [2024-09-17 18:19:18,547 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:19:18,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:18,548 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:18,550 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:18,551 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-17 18:19:18,615 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 18:19:18,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:18,617 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 18:19:18,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:19,176 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:19,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 246 proven. 78 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:19,574 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424805293] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:19,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:19,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 49 [2024-09-17 18:19:19,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506852373] [2024-09-17 18:19:19,575 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:19,575 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2024-09-17 18:19:19,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:19,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2024-09-17 18:19:19,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=481, Invalid=1871, Unknown=0, NotChecked=0, Total=2352 [2024-09-17 18:19:19,576 INFO L87 Difference]: Start difference. First operand 140 states and 154 transitions. Second operand has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:20,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:20,129 INFO L93 Difference]: Finished difference Result 241 states and 283 transitions. [2024-09-17 18:19:20,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-17 18:19:20,130 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) Word has length 112 [2024-09-17 18:19:20,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:20,132 INFO L225 Difference]: With dead ends: 241 [2024-09-17 18:19:20,132 INFO L226 Difference]: Without dead ends: 194 [2024-09-17 18:19:20,132 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 207 SyntacticMatches, 26 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1412 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=489, Invalid=1961, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 18:19:20,133 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 397 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:20,133 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 252 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 397 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:20,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2024-09-17 18:19:20,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 142. [2024-09-17 18:19:20,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 112 states have (on average 1.1428571428571428) internal successors, (128), 113 states have internal predecessors, (128), 15 states have call successors, (15), 15 states have call predecessors, (15), 14 states have return successors, (14), 13 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:19:20,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 157 transitions. [2024-09-17 18:19:20,301 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 157 transitions. Word has length 112 [2024-09-17 18:19:20,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:20,301 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 157 transitions. [2024-09-17 18:19:20,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.7959183673469388) internal successors, (88), 49 states have internal predecessors, (88), 27 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 26 states have call predecessors, (26), 26 states have call successors, (26) [2024-09-17 18:19:20,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:20,301 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 157 transitions. [2024-09-17 18:19:20,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2024-09-17 18:19:20,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:20,302 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:20,317 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:20,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-17 18:19:20,503 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:20,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:20,504 INFO L85 PathProgramCache]: Analyzing trace with hash -51276607, now seen corresponding path program 24 times [2024-09-17 18:19:20,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:20,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701564215] [2024-09-17 18:19:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:20,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:20,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:20,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:20,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,761 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:20,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,762 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:20,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:20,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:20,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:20,767 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 102 proven. 235 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:20,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701564215] [2024-09-17 18:19:20,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701564215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:20,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498386378] [2024-09-17 18:19:20,768 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:19:20,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:20,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:20,770 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:20,771 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-17 18:19:20,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 18:19:20,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:20,839 INFO L262 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:20,841 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:20,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:21,173 INFO L134 CoverageAnalysis]: Checked inductivity of 601 backedges. 115 proven. 222 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2024-09-17 18:19:21,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498386378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:21,173 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:21,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 21 [2024-09-17 18:19:21,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424380753] [2024-09-17 18:19:21,173 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:21,174 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 18:19:21,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:21,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 18:19:21,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2024-09-17 18:19:21,174 INFO L87 Difference]: Start difference. First operand 142 states and 157 transitions. Second operand has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:19:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:21,496 INFO L93 Difference]: Finished difference Result 155 states and 171 transitions. [2024-09-17 18:19:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 18:19:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) Word has length 113 [2024-09-17 18:19:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:21,498 INFO L225 Difference]: With dead ends: 155 [2024-09-17 18:19:21,498 INFO L226 Difference]: Without dead ends: 153 [2024-09-17 18:19:21,499 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 282 GetRequests, 236 SyntacticMatches, 26 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:19:21,499 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 33 mSDsluCounter, 288 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:21,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 329 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:21,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-09-17 18:19:21,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 149. [2024-09-17 18:19:21,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 118 states have internal predecessors, (133), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:21,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 164 transitions. [2024-09-17 18:19:21,646 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 164 transitions. Word has length 113 [2024-09-17 18:19:21,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:21,646 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 164 transitions. [2024-09-17 18:19:21,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.857142857142857) internal successors, (60), 19 states have internal predecessors, (60), 14 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (13), 13 states have call predecessors, (13), 13 states have call successors, (13) [2024-09-17 18:19:21,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:21,647 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 164 transitions. [2024-09-17 18:19:21,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:21,648 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:21,648 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:21,663 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-09-17 18:19:21,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-17 18:19:21,849 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:21,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:21,850 INFO L85 PathProgramCache]: Analyzing trace with hash 827365751, now seen corresponding path program 25 times [2024-09-17 18:19:21,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:21,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526701727] [2024-09-17 18:19:21,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:21,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:21,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:22,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:22,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:22,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:22,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:22,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:22,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:22,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:22,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:22,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:22,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:22,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:22,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:22,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,368 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:22,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,369 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:22,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:22,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526701727] [2024-09-17 18:19:22,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526701727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:22,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078151961] [2024-09-17 18:19:22,370 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:19:22,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:22,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:22,372 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:22,372 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-17 18:19:22,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:22,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:22,435 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:23,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:23,784 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:23,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078151961] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:23,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:23,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-09-17 18:19:23,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579073138] [2024-09-17 18:19:23,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:23,785 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-17 18:19:23,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:23,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-17 18:19:23,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=791, Invalid=3369, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:19:23,787 INFO L87 Difference]: Start difference. First operand 149 states and 164 transitions. Second operand has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:24,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:24,376 INFO L93 Difference]: Finished difference Result 255 states and 299 transitions. [2024-09-17 18:19:24,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:24,377 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:24,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:24,379 INFO L225 Difference]: With dead ends: 255 [2024-09-17 18:19:24,379 INFO L226 Difference]: Without dead ends: 205 [2024-09-17 18:19:24,380 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 209 SyntacticMatches, 28 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3383 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=799, Invalid=3491, Unknown=0, NotChecked=0, Total=4290 [2024-09-17 18:19:24,380 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:24,380 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 326 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:24,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2024-09-17 18:19:24,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 150. [2024-09-17 18:19:24,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:24,550 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:24,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:24,550 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:24,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6307692307692307) internal successors, (106), 65 states have internal predecessors, (106), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:24,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:24,551 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:24,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:24,552 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:24,567 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:24,755 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:24,756 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:24,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:24,756 INFO L85 PathProgramCache]: Analyzing trace with hash -36359690, now seen corresponding path program 67 times [2024-09-17 18:19:24,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:24,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336681600] [2024-09-17 18:19:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:24,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:24,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:25,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:25,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,251 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:25,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:25,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:25,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,255 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:25,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:25,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:25,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:25,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:25,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:25,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,264 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:25,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,265 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:25,266 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336681600] [2024-09-17 18:19:25,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336681600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:25,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549615391] [2024-09-17 18:19:25,266 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:19:25,266 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:25,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:25,268 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:25,269 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-17 18:19:25,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:25,332 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:25,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:26,166 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:26,166 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:26,620 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:26,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549615391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:26,621 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:26,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 64 [2024-09-17 18:19:26,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273342751] [2024-09-17 18:19:26,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:26,621 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-17 18:19:26,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:26,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-17 18:19:26,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=748, Invalid=3284, Unknown=0, NotChecked=0, Total=4032 [2024-09-17 18:19:26,623 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:27,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:27,437 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-17 18:19:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:27,438 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:27,440 INFO L225 Difference]: With dead ends: 267 [2024-09-17 18:19:27,440 INFO L226 Difference]: Without dead ends: 217 [2024-09-17 18:19:27,441 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 210 SyntacticMatches, 28 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3279 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=756, Invalid=3404, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:19:27,441 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 485 SdHoareTripleChecker+Invalid, 752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:27,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 485 Invalid, 752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:27,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-17 18:19:27,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-17 18:19:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:27,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:27,644 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:27,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:27,644 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:27,645 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.640625) internal successors, (105), 64 states have internal predecessors, (105), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:27,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:27,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:27,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:27,649 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:27,668 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-09-17 18:19:27,850 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-17 18:19:27,850 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:27,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:27,850 INFO L85 PathProgramCache]: Analyzing trace with hash -64221801, now seen corresponding path program 68 times [2024-09-17 18:19:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:27,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467959312] [2024-09-17 18:19:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,300 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:28,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:28,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:28,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,306 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:28,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,308 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:28,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,309 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:28,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:28,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:28,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:28,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:28,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,315 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:28,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:28,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:28,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:28,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467959312] [2024-09-17 18:19:28,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467959312] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:28,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325632508] [2024-09-17 18:19:28,320 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:19:28,320 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:28,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:28,322 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:28,323 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-17 18:19:28,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:19:28,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:28,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:28,390 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:29,120 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:29,120 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:29,514 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:29,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [325632508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:29,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:29,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 63 [2024-09-17 18:19:29,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183381743] [2024-09-17 18:19:29,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:29,516 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-17 18:19:29,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:29,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-17 18:19:29,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=709, Invalid=3197, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 18:19:29,518 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:30,480 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-17 18:19:30,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:30,480 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:30,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:30,482 INFO L225 Difference]: With dead ends: 277 [2024-09-17 18:19:30,482 INFO L226 Difference]: Without dead ends: 227 [2024-09-17 18:19:30,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 211 SyntacticMatches, 28 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3124 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=717, Invalid=3315, Unknown=0, NotChecked=0, Total=4032 [2024-09-17 18:19:30,483 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 388 SdHoareTripleChecker+Invalid, 647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:30,486 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 388 Invalid, 647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:30,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-17 18:19:30,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-17 18:19:30,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:30,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:30,670 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:30,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:30,670 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:30,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6507936507936507) internal successors, (104), 63 states have internal predecessors, (104), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:30,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:30,671 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:30,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:30,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:30,672 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:30,689 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2024-09-17 18:19:30,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:30,876 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:30,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:30,877 INFO L85 PathProgramCache]: Analyzing trace with hash 766163414, now seen corresponding path program 69 times [2024-09-17 18:19:30,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:30,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120917242] [2024-09-17 18:19:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:30,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:30,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:31,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:31,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:31,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,380 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:31,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,381 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:31,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:31,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:31,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,387 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:31,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:31,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:31,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:31,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:31,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:31,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120917242] [2024-09-17 18:19:31,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120917242] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:31,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135980242] [2024-09-17 18:19:31,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:19:31,396 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:31,396 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:31,398 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:31,399 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-17 18:19:31,470 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-17 18:19:31,470 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:31,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:31,473 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:32,284 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:32,285 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:32,732 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:32,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135980242] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:32,732 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:32,732 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 62 [2024-09-17 18:19:32,732 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967086524] [2024-09-17 18:19:32,732 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:32,733 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-17 18:19:32,733 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-17 18:19:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=674, Invalid=3108, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:19:32,739 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:33,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:33,877 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-17 18:19:33,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:33,878 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:33,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:33,880 INFO L225 Difference]: With dead ends: 285 [2024-09-17 18:19:33,880 INFO L226 Difference]: Without dead ends: 235 [2024-09-17 18:19:33,880 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 212 SyntacticMatches, 28 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2972 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=682, Invalid=3224, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 18:19:33,881 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 532 SdHoareTripleChecker+Invalid, 847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:33,881 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 532 Invalid, 847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:19:33,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-17 18:19:34,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-17 18:19:34,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:34,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:34,077 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:34,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:34,078 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:34,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6612903225806452) internal successors, (103), 62 states have internal predecessors, (103), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:34,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:34,078 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:34,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:34,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:34,079 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:34,096 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-09-17 18:19:34,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:34,283 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:34,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:34,283 INFO L85 PathProgramCache]: Analyzing trace with hash 2039876023, now seen corresponding path program 70 times [2024-09-17 18:19:34,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:34,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [329389466] [2024-09-17 18:19:34,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:34,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:34,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:34,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:34,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:34,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:34,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:34,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:34,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:34,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:34,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:34,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:34,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:34,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:34,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:34,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [329389466] [2024-09-17 18:19:34,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [329389466] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:34,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [289518694] [2024-09-17 18:19:34,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:19:34,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:34,806 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:34,807 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:34,808 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-17 18:19:34,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:19:34,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:34,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:34,872 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:35,673 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:35,673 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:36,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [289518694] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:36,118 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:36,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 61 [2024-09-17 18:19:36,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081667536] [2024-09-17 18:19:36,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:36,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-17 18:19:36,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:36,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-17 18:19:36,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=643, Invalid=3017, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:19:36,120 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:37,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:37,249 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-17 18:19:37,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:37,250 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:37,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:37,252 INFO L225 Difference]: With dead ends: 291 [2024-09-17 18:19:37,252 INFO L226 Difference]: Without dead ends: 241 [2024-09-17 18:19:37,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 213 SyntacticMatches, 28 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=651, Invalid=3131, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:19:37,253 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 415 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:37,253 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 415 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:37,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-17 18:19:37,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-17 18:19:37,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:37,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:37,465 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:37,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:37,466 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:37,466 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.6721311475409837) internal successors, (102), 61 states have internal predecessors, (102), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:37,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:37,466 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:37,467 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:37,467 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:37,484 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:37,671 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-17 18:19:37,672 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:37,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:37,672 INFO L85 PathProgramCache]: Analyzing trace with hash 1526774198, now seen corresponding path program 71 times [2024-09-17 18:19:37,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:37,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276848474] [2024-09-17 18:19:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:37,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:38,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:38,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:38,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:38,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,178 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:38,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:38,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:38,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:38,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:38,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,184 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:38,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:38,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:38,186 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:38,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276848474] [2024-09-17 18:19:38,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276848474] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:38,187 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343288091] [2024-09-17 18:19:38,187 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:19:38,187 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:38,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:38,189 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:38,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-17 18:19:38,257 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-17 18:19:38,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:38,259 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:38,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:39,047 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:39,047 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:39,493 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:39,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343288091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:39,494 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:39,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 60 [2024-09-17 18:19:39,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678664368] [2024-09-17 18:19:39,494 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:39,495 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-17 18:19:39,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:39,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-17 18:19:39,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=616, Invalid=2924, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:19:39,496 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:40,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:40,646 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-17 18:19:40,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:40,647 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:40,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:40,649 INFO L225 Difference]: With dead ends: 295 [2024-09-17 18:19:40,649 INFO L226 Difference]: Without dead ends: 245 [2024-09-17 18:19:40,649 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 214 SyntacticMatches, 28 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2677 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=624, Invalid=3036, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:19:40,650 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 483 SdHoareTripleChecker+Invalid, 668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:40,650 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 483 Invalid, 668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:40,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-17 18:19:40,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-17 18:19:40,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:40,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:40,838 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:40,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:40,838 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:40,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6833333333333333) internal successors, (101), 60 states have internal predecessors, (101), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:40,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:40,838 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:40,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:40,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:40,839 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:40,854 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:41,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2024-09-17 18:19:41,039 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:41,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:41,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1953460777, now seen corresponding path program 72 times [2024-09-17 18:19:41,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:41,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862312101] [2024-09-17 18:19:41,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:41,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:41,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:41,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:41,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,480 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:41,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:41,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:41,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,484 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:41,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,486 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:41,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,491 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:41,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:41,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:41,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,498 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:41,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:41,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,501 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:41,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:41,503 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:41,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862312101] [2024-09-17 18:19:41,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [862312101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:41,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1694249900] [2024-09-17 18:19:41,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:19:41,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:41,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:41,506 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:41,507 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-09-17 18:19:41,574 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-17 18:19:41,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:41,577 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:41,578 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:42,322 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:42,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:42,771 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:42,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1694249900] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:42,772 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:42,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 59 [2024-09-17 18:19:42,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590007054] [2024-09-17 18:19:42,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:42,773 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-17 18:19:42,773 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:42,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-17 18:19:42,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=593, Invalid=2829, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:19:42,774 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:44,080 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-17 18:19:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:44,080 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:44,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:44,082 INFO L225 Difference]: With dead ends: 297 [2024-09-17 18:19:44,083 INFO L226 Difference]: Without dead ends: 247 [2024-09-17 18:19:44,083 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 215 SyntacticMatches, 28 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2534 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=601, Invalid=2939, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:19:44,083 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 393 mSDsCounter, 0 mSdLazyCounter, 537 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 537 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:44,084 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 432 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 537 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:44,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-17 18:19:44,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-17 18:19:44,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:44,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:44,292 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:44,293 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:44,293 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.694915254237288) internal successors, (100), 59 states have internal predecessors, (100), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:44,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:44,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:44,294 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:44,294 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:44,313 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:44,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:44,499 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:44,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:44,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1536504214, now seen corresponding path program 73 times [2024-09-17 18:19:44,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:44,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787494494] [2024-09-17 18:19:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:44,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:44,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:44,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:44,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:44,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:44,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:44,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:44,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,978 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:44,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:44,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:44,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,982 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:44,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:44,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:44,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:44,986 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 249 proven. 86 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:44,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:44,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787494494] [2024-09-17 18:19:44,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787494494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:44,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1868076035] [2024-09-17 18:19:44,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:19:44,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:44,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:44,988 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:44,989 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-09-17 18:19:45,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:45,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:45,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:45,643 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:45,643 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:45,999 INFO L134 CoverageAnalysis]: Checked inductivity of 647 backedges. 286 proven. 49 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:45,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1868076035] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:45,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:46,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 58 [2024-09-17 18:19:46,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903080375] [2024-09-17 18:19:46,000 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:46,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-17 18:19:46,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:46,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-17 18:19:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=574, Invalid=2732, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:19:46,002 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:47,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:47,614 INFO L93 Difference]: Finished difference Result 297 states and 341 transitions. [2024-09-17 18:19:47,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:47,615 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:47,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:47,617 INFO L225 Difference]: With dead ends: 297 [2024-09-17 18:19:47,617 INFO L226 Difference]: Without dead ends: 247 [2024-09-17 18:19:47,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 216 SyntacticMatches, 28 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=582, Invalid=2840, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:19:47,621 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 381 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:47,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 381 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-17 18:19:47,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-17 18:19:48,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 150. [2024-09-17 18:19:48,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:48,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:48,068 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:48,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:48,072 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:48,072 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.706896551724138) internal successors, (99), 58 states have internal predecessors, (99), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:48,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:48,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:48,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:48,073 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 8, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:48,107 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Ended with exit code 0 [2024-09-17 18:19:48,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-17 18:19:48,274 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:48,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:48,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1398957577, now seen corresponding path program 74 times [2024-09-17 18:19:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559372414] [2024-09-17 18:19:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:48,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:48,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:48,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:48,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:48,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:48,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:48,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:48,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:48,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,721 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:48,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:48,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:48,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,724 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:48,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:48,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:48,727 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 249 proven. 88 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:48,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:48,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559372414] [2024-09-17 18:19:48,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559372414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:48,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510405612] [2024-09-17 18:19:48,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:19:48,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:48,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:48,729 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:48,730 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-09-17 18:19:48,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:19:48,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:48,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:48,792 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:49,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 649 backedges. 286 proven. 51 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:49,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1510405612] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:49,715 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:49,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 57 [2024-09-17 18:19:49,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552089040] [2024-09-17 18:19:49,716 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:49,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-17 18:19:49,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:49,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-17 18:19:49,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=559, Invalid=2633, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:19:49,718 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:50,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:50,862 INFO L93 Difference]: Finished difference Result 295 states and 339 transitions. [2024-09-17 18:19:50,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:50,863 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:50,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:50,864 INFO L225 Difference]: With dead ends: 295 [2024-09-17 18:19:50,865 INFO L226 Difference]: Without dead ends: 245 [2024-09-17 18:19:50,865 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 217 SyntacticMatches, 28 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2257 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=567, Invalid=2739, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:19:50,865 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 262 mSDsCounter, 0 mSdLazyCounter, 474 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 474 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 474 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:50,865 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 303 Invalid, 474 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 474 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:50,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2024-09-17 18:19:51,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 150. [2024-09-17 18:19:51,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:51,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:51,094 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:51,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:51,094 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:51,094 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.719298245614035) internal successors, (98), 57 states have internal predecessors, (98), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:51,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:51,094 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:51,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:51,098 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:51,098 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:51,123 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:51,299 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2024-09-17 18:19:51,299 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:51,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:51,299 INFO L85 PathProgramCache]: Analyzing trace with hash 1554391414, now seen corresponding path program 75 times [2024-09-17 18:19:51,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:51,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152431129] [2024-09-17 18:19:51,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:51,300 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:51,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:51,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,742 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:51,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:51,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:51,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:51,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,748 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:51,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:51,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:51,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:51,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,756 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:51,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:51,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:51,758 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 249 proven. 92 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:51,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:51,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152431129] [2024-09-17 18:19:51,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152431129] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:51,759 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433597770] [2024-09-17 18:19:51,759 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:19:51,759 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:51,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:51,761 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:51,762 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-09-17 18:19:51,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 14 check-sat command(s) [2024-09-17 18:19:51,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:51,832 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:51,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:52,438 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:52,439 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:52,866 INFO L134 CoverageAnalysis]: Checked inductivity of 653 backedges. 286 proven. 55 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:52,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433597770] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:52,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:52,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 56 [2024-09-17 18:19:52,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433795884] [2024-09-17 18:19:52,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:52,867 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-17 18:19:52,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:52,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-17 18:19:52,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=548, Invalid=2532, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:19:52,868 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:54,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:54,096 INFO L93 Difference]: Finished difference Result 291 states and 335 transitions. [2024-09-17 18:19:54,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:54,097 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:54,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:54,099 INFO L225 Difference]: With dead ends: 291 [2024-09-17 18:19:54,099 INFO L226 Difference]: Without dead ends: 241 [2024-09-17 18:19:54,100 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 218 SyntacticMatches, 28 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2123 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=556, Invalid=2636, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:19:54,100 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 538 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 393 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:54,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 393 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 538 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:19:54,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2024-09-17 18:19:54,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 150. [2024-09-17 18:19:54,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:54,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:54,301 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:54,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:54,302 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:54,302 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7321428571428572) internal successors, (97), 56 states have internal predecessors, (97), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:54,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:54,302 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:54,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:54,303 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:54,303 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:54,320 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:54,507 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-17 18:19:54,508 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:54,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:54,508 INFO L85 PathProgramCache]: Analyzing trace with hash 264187415, now seen corresponding path program 76 times [2024-09-17 18:19:54,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:54,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514034274] [2024-09-17 18:19:54,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:54,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:54,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:54,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:54,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:54,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:54,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,956 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:54,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:54,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:54,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:54,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,965 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:54,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,966 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:54,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:54,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:54,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:54,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:54,979 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 249 proven. 98 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:54,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514034274] [2024-09-17 18:19:54,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514034274] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:54,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415342152] [2024-09-17 18:19:54,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:19:54,979 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:54,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:54,985 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:54,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-09-17 18:19:55,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:19:55,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:55,095 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:55,101 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:55,695 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:55,695 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:56,041 INFO L134 CoverageAnalysis]: Checked inductivity of 659 backedges. 286 proven. 61 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:56,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415342152] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:56,041 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:56,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 55 [2024-09-17 18:19:56,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086611928] [2024-09-17 18:19:56,042 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:56,042 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-17 18:19:56,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:56,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-17 18:19:56,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=541, Invalid=2429, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:19:56,043 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:57,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:19:57,118 INFO L93 Difference]: Finished difference Result 285 states and 329 transitions. [2024-09-17 18:19:57,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:19:57,119 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:19:57,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:19:57,121 INFO L225 Difference]: With dead ends: 285 [2024-09-17 18:19:57,121 INFO L226 Difference]: Without dead ends: 235 [2024-09-17 18:19:57,122 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 219 SyntacticMatches, 28 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1992 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=549, Invalid=2531, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:19:57,122 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 493 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 493 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:19:57,122 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 493 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:19:57,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2024-09-17 18:19:57,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 150. [2024-09-17 18:19:57,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:19:57,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:19:57,336 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:19:57,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:19:57,336 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:19:57,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7454545454545454) internal successors, (96), 55 states have internal predecessors, (96), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:19:57,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:57,337 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:19:57,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:19:57,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:19:57,338 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 11, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:19:57,356 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2024-09-17 18:19:57,538 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-17 18:19:57,538 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:19:57,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:19:57,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1024358058, now seen corresponding path program 77 times [2024-09-17 18:19:57,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:19:57,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361803911] [2024-09-17 18:19:57,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:19:57,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:19:57,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:19:58,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,048 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:19:58,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:19:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:19:58,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:19:58,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:19:58,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:19:58,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:19:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:19:58,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:19:58,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:19:58,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:19:58,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:19:58,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:19:58,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:19:58,065 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 249 proven. 106 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:58,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:19:58,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361803911] [2024-09-17 18:19:58,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361803911] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:19:58,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226367338] [2024-09-17 18:19:58,066 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:19:58,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:19:58,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:19:58,069 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:19:58,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-09-17 18:19:58,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2024-09-17 18:19:58,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:19:58,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:19:58,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:19:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:58,814 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:19:59,267 INFO L134 CoverageAnalysis]: Checked inductivity of 667 backedges. 286 proven. 69 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:19:59,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226367338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:19:59,267 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:19:59,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 54 [2024-09-17 18:19:59,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098334023] [2024-09-17 18:19:59,268 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:19:59,268 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-17 18:19:59,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:19:59,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-17 18:19:59,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:19:59,269 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:00,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:00,253 INFO L93 Difference]: Finished difference Result 277 states and 321 transitions. [2024-09-17 18:20:00,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:20:00,253 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:20:00,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:00,255 INFO L225 Difference]: With dead ends: 277 [2024-09-17 18:20:00,255 INFO L226 Difference]: Without dead ends: 227 [2024-09-17 18:20:00,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 220 SyntacticMatches, 28 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1864 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=546, Invalid=2424, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:20:00,256 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 235 mSDsCounter, 0 mSdLazyCounter, 406 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:00,256 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 406 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:00,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2024-09-17 18:20:00,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 150. [2024-09-17 18:20:00,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:20:00,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:20:00,471 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:20:00,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:00,471 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:20:00,471 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.7592592592592593) internal successors, (95), 54 states have internal predecessors, (95), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:00,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:00,472 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:20:00,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:20:00,472 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:00,473 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:00,490 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-09-17 18:20:00,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2024-09-17 18:20:00,676 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:00,676 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:00,676 INFO L85 PathProgramCache]: Analyzing trace with hash -1065924041, now seen corresponding path program 78 times [2024-09-17 18:20:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:00,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327976533] [2024-09-17 18:20:00,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:00,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:00,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:01,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:20:01,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:20:01,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:20:01,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:20:01,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,167 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:20:01,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,168 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:20:01,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:20:01,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:20:01,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:20:01,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:20:01,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:20:01,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:20:01,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:20:01,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:01,178 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 249 proven. 116 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:01,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:01,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327976533] [2024-09-17 18:20:01,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327976533] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:01,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003869392] [2024-09-17 18:20:01,179 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:20:01,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:01,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:01,181 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:01,182 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-09-17 18:20:01,253 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2024-09-17 18:20:01,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:01,255 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:20:01,257 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:01,777 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:01,777 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 677 backedges. 286 proven. 79 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:02,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1003869392] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:02,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:02,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2024-09-17 18:20:02,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105398495] [2024-09-17 18:20:02,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:02,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-17 18:20:02,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:02,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-17 18:20:02,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=2217, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:20:02,133 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:02,959 INFO L93 Difference]: Finished difference Result 267 states and 311 transitions. [2024-09-17 18:20:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:20:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:20:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:02,962 INFO L225 Difference]: With dead ends: 267 [2024-09-17 18:20:02,962 INFO L226 Difference]: Without dead ends: 217 [2024-09-17 18:20:02,963 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 221 SyntacticMatches, 28 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1739 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=547, Invalid=2315, Unknown=0, NotChecked=0, Total=2862 [2024-09-17 18:20:02,963 INFO L434 NwaCegarLoop]: 39 mSDtfsCounter, 6 mSDsluCounter, 319 mSDsCounter, 0 mSdLazyCounter, 464 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 358 SdHoareTripleChecker+Invalid, 464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:02,963 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 358 Invalid, 464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 464 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2024-09-17 18:20:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 150. [2024-09-17 18:20:03,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 118 states have (on average 1.1355932203389831) internal successors, (134), 119 states have internal predecessors, (134), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:20:03,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 165 transitions. [2024-09-17 18:20:03,178 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 165 transitions. Word has length 120 [2024-09-17 18:20:03,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:03,178 INFO L474 AbstractCegarLoop]: Abstraction has 150 states and 165 transitions. [2024-09-17 18:20:03,179 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.7735849056603774) internal successors, (94), 53 states have internal predecessors, (94), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:03,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:03,179 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 165 transitions. [2024-09-17 18:20:03,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-17 18:20:03,179 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:03,180 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:03,198 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2024-09-17 18:20:03,383 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,117 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:03,384 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:03,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:03,384 INFO L85 PathProgramCache]: Analyzing trace with hash 179661110, now seen corresponding path program 13 times [2024-09-17 18:20:03,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:03,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921689061] [2024-09-17 18:20:03,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:03,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:03,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:03,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-17 18:20:03,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-17 18:20:03,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 39 [2024-09-17 18:20:03,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2024-09-17 18:20:03,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,806 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-17 18:20:03,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2024-09-17 18:20:03,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-17 18:20:03,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-17 18:20:03,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-17 18:20:03,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-17 18:20:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 95 [2024-09-17 18:20:03,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2024-09-17 18:20:03,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 109 [2024-09-17 18:20:03,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,817 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 249 proven. 128 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:03,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:03,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921689061] [2024-09-17 18:20:03,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921689061] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:03,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397079978] [2024-09-17 18:20:03,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:20:03,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:03,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:03,819 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:03,821 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-09-17 18:20:03,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:03,885 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 18:20:03,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:04,553 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:04,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:04,910 INFO L134 CoverageAnalysis]: Checked inductivity of 689 backedges. 286 proven. 91 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:04,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397079978] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:04,911 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:04,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2024-09-17 18:20:04,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313341789] [2024-09-17 18:20:04,912 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:04,912 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2024-09-17 18:20:04,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:04,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2024-09-17 18:20:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=544, Invalid=2108, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 18:20:04,914 INFO L87 Difference]: Start difference. First operand 150 states and 165 transitions. Second operand has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:05,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:05,582 INFO L93 Difference]: Finished difference Result 258 states and 303 transitions. [2024-09-17 18:20:05,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-17 18:20:05,583 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) Word has length 120 [2024-09-17 18:20:05,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:05,586 INFO L225 Difference]: With dead ends: 258 [2024-09-17 18:20:05,586 INFO L226 Difference]: Without dead ends: 208 [2024-09-17 18:20:05,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 301 GetRequests, 222 SyntacticMatches, 28 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1605 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=552, Invalid=2204, Unknown=0, NotChecked=0, Total=2756 [2024-09-17 18:20:05,587 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 348 mSDsCounter, 0 mSdLazyCounter, 496 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:05,587 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 389 Invalid, 496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 496 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:05,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2024-09-17 18:20:05,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 152. [2024-09-17 18:20:05,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 120 states have (on average 1.1416666666666666) internal successors, (137), 121 states have internal predecessors, (137), 16 states have call successors, (16), 16 states have call predecessors, (16), 15 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:20:05,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 168 transitions. [2024-09-17 18:20:05,825 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 168 transitions. Word has length 120 [2024-09-17 18:20:05,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:05,826 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 168 transitions. [2024-09-17 18:20:05,826 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.7884615384615385) internal successors, (93), 52 states have internal predecessors, (93), 29 states have call successors, (30), 2 states have call predecessors, (30), 1 states have return successors, (28), 28 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-17 18:20:05,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:05,826 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 168 transitions. [2024-09-17 18:20:05,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-17 18:20:05,827 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:05,827 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:05,844 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:06,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:06,032 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:06,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:06,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1632046878, now seen corresponding path program 26 times [2024-09-17 18:20:06,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:06,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725207033] [2024-09-17 18:20:06,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:06,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:06,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:06,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:06,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:06,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,289 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:06,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:06,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,292 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:06,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:06,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:06,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:06,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:06,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:06,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:06,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:06,300 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 117 proven. 274 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:06,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:06,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725207033] [2024-09-17 18:20:06,300 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725207033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:06,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253638754] [2024-09-17 18:20:06,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:20:06,301 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:06,301 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:06,302 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:06,303 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-09-17 18:20:06,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:20:06,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:06,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-17 18:20:06,376 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:06,447 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:06,448 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 131 proven. 260 refuted. 0 times theorem prover too weak. 312 trivial. 0 not checked. [2024-09-17 18:20:06,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [253638754] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:06,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:06,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 22 [2024-09-17 18:20:06,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426566851] [2024-09-17 18:20:06,711 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:06,711 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-17 18:20:06,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:06,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-17 18:20:06,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2024-09-17 18:20:06,712 INFO L87 Difference]: Start difference. First operand 152 states and 168 transitions. Second operand has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:20:07,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:07,212 INFO L93 Difference]: Finished difference Result 165 states and 182 transitions. [2024-09-17 18:20:07,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-17 18:20:07,213 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) Word has length 121 [2024-09-17 18:20:07,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:07,215 INFO L225 Difference]: With dead ends: 165 [2024-09-17 18:20:07,215 INFO L226 Difference]: Without dead ends: 163 [2024-09-17 18:20:07,215 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 251 SyntacticMatches, 30 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 388 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:20:07,215 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 32 mSDsluCounter, 274 mSDsCounter, 0 mSdLazyCounter, 286 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 286 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:07,216 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 317 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 286 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:07,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2024-09-17 18:20:07,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 159. [2024-09-17 18:20:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 125 states have (on average 1.136) internal successors, (142), 126 states have internal predecessors, (142), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:07,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 175 transitions. [2024-09-17 18:20:07,447 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 175 transitions. Word has length 121 [2024-09-17 18:20:07,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:07,447 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 175 transitions. [2024-09-17 18:20:07,447 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.8636363636363638) internal successors, (63), 20 states have internal predecessors, (63), 15 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (14), 14 states have call predecessors, (14), 14 states have call successors, (14) [2024-09-17 18:20:07,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:07,447 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 175 transitions. [2024-09-17 18:20:07,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:07,448 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:07,448 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:07,464 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2024-09-17 18:20:07,649 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-09-17 18:20:07,649 INFO L399 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:07,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:07,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1580169674, now seen corresponding path program 27 times [2024-09-17 18:20:07,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:07,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057126970] [2024-09-17 18:20:07,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:07,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:07,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,140 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:08,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:08,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:08,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:08,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:08,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:08,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:08,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,173 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:08,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:08,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:08,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:08,181 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:08,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:08,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057126970] [2024-09-17 18:20:08,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057126970] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:08,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292146986] [2024-09-17 18:20:08,185 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:20:08,185 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:08,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:08,187 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:08,188 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-09-17 18:20:08,261 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-17 18:20:08,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:08,263 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:08,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:09,201 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:09,202 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:09,660 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:09,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292146986] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:09,661 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:09,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-17 18:20:09,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185384625] [2024-09-17 18:20:09,661 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:09,661 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-17 18:20:09,662 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:09,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-17 18:20:09,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3801, Unknown=0, NotChecked=0, Total=4692 [2024-09-17 18:20:09,663 INFO L87 Difference]: Start difference. First operand 159 states and 175 transitions. Second operand has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:10,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:10,434 INFO L93 Difference]: Finished difference Result 272 states and 319 transitions. [2024-09-17 18:20:10,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:10,435 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:10,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:10,437 INFO L225 Difference]: With dead ends: 272 [2024-09-17 18:20:10,437 INFO L226 Difference]: Without dead ends: 219 [2024-09-17 18:20:10,437 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 223 SyntacticMatches, 30 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3858 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=899, Invalid=3931, Unknown=0, NotChecked=0, Total=4830 [2024-09-17 18:20:10,438 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 279 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:10,438 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 320 Invalid, 587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:10,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-17 18:20:10,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 160. [2024-09-17 18:20:10,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:10,686 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:10,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:10,686 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:10,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6231884057971016) internal successors, (112), 69 states have internal predecessors, (112), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:10,687 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:10,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:10,687 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:10,687 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:10,704 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:10,891 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2024-09-17 18:20:10,892 INFO L399 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:10,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:10,892 INFO L85 PathProgramCache]: Analyzing trace with hash -634376267, now seen corresponding path program 79 times [2024-09-17 18:20:10,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:10,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461489669] [2024-09-17 18:20:10,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:10,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:10,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:11,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:11,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:11,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:11,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:11,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:11,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:11,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:11,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,452 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:11,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:11,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:11,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:11,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:11,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,459 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:11,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461489669] [2024-09-17 18:20:11,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461489669] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:11,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786928485] [2024-09-17 18:20:11,459 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:20:11,459 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:11,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:11,461 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:11,462 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-09-17 18:20:11,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:11,524 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:11,526 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:12,455 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:12,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:12,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786928485] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:12,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:12,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 68 [2024-09-17 18:20:12,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126064583] [2024-09-17 18:20:12,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:12,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2024-09-17 18:20:12,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2024-09-17 18:20:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=845, Invalid=3711, Unknown=0, NotChecked=0, Total=4556 [2024-09-17 18:20:12,963 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:14,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:14,025 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-17 18:20:14,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:14,026 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:14,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:14,028 INFO L225 Difference]: With dead ends: 285 [2024-09-17 18:20:14,028 INFO L226 Difference]: Without dead ends: 232 [2024-09-17 18:20:14,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 224 SyntacticMatches, 30 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3747 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=853, Invalid=3839, Unknown=0, NotChecked=0, Total=4692 [2024-09-17 18:20:14,029 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 469 mSDsCounter, 0 mSdLazyCounter, 727 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:14,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 514 Invalid, 727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 727 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:14,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-17 18:20:14,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-17 18:20:14,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:14,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:14,294 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:14,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:14,294 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:14,295 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.6323529411764706) internal successors, (111), 68 states have internal predecessors, (111), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:14,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:14,295 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:14,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:14,295 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:14,296 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:14,312 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:14,496 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:14,497 INFO L399 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:14,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:14,497 INFO L85 PathProgramCache]: Analyzing trace with hash -326772138, now seen corresponding path program 80 times [2024-09-17 18:20:14,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:14,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601547507] [2024-09-17 18:20:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:14,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:14,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:15,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:15,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:15,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,057 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:15,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,058 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:15,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:15,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:15,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:15,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,063 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:15,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:15,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:15,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:15,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:15,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:15,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:15,072 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:15,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601547507] [2024-09-17 18:20:15,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601547507] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:15,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999356119] [2024-09-17 18:20:15,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:20:15,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:15,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:15,075 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:15,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-09-17 18:20:15,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:20:15,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:15,142 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:15,143 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:16,068 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:16,069 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:16,570 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:16,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999356119] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:16,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:16,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 67 [2024-09-17 18:20:16,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619534914] [2024-09-17 18:20:16,571 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:16,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2024-09-17 18:20:16,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:16,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2024-09-17 18:20:16,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=803, Invalid=3619, Unknown=0, NotChecked=0, Total=4422 [2024-09-17 18:20:16,573 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:17,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:17,873 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-17 18:20:17,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:17,873 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:17,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:17,875 INFO L225 Difference]: With dead ends: 296 [2024-09-17 18:20:17,876 INFO L226 Difference]: Without dead ends: 243 [2024-09-17 18:20:17,876 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 225 SyntacticMatches, 30 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3581 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=811, Invalid=3745, Unknown=0, NotChecked=0, Total=4556 [2024-09-17 18:20:17,876 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 770 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 770 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 770 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:17,876 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 502 Invalid, 770 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 770 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-17 18:20:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-17 18:20:18,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:18,137 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:18,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:18,137 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:18,137 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.6417910447761195) internal successors, (110), 67 states have internal predecessors, (110), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:18,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:18,138 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:18,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:18,138 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:18,138 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:18,155 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:18,342 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:18,343 INFO L399 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:18,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:18,343 INFO L85 PathProgramCache]: Analyzing trace with hash 930076565, now seen corresponding path program 81 times [2024-09-17 18:20:18,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:18,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2100242305] [2024-09-17 18:20:18,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:18,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:18,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:18,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:18,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:18,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:18,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:18,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:18,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:18,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:18,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:18,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:18,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:18,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:18,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:18,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:18,918 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:18,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2100242305] [2024-09-17 18:20:18,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2100242305] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:18,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492401757] [2024-09-17 18:20:18,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:20:18,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:18,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:18,921 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:18,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-09-17 18:20:18,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-17 18:20:18,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:18,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:19,001 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:19,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:20,422 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:20,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492401757] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:20,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:20,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 66 [2024-09-17 18:20:20,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807368400] [2024-09-17 18:20:20,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:20,423 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-17 18:20:20,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:20,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-17 18:20:20,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=765, Invalid=3525, Unknown=0, NotChecked=0, Total=4290 [2024-09-17 18:20:20,425 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:21,828 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:21,828 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-17 18:20:21,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:21,829 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:21,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:21,831 INFO L225 Difference]: With dead ends: 305 [2024-09-17 18:20:21,831 INFO L226 Difference]: Without dead ends: 252 [2024-09-17 18:20:21,832 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 226 SyntacticMatches, 30 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3418 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=773, Invalid=3649, Unknown=0, NotChecked=0, Total=4422 [2024-09-17 18:20:21,832 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 750 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 750 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 750 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:21,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 447 Invalid, 750 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 750 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:21,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-17 18:20:22,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-17 18:20:22,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:22,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:22,111 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:22,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:22,111 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:22,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6515151515151516) internal successors, (109), 66 states have internal predecessors, (109), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:22,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:22,112 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:22,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:22,112 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:22,112 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:22,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2024-09-17 18:20:22,313 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,123 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:22,313 INFO L399 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:22,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:22,313 INFO L85 PathProgramCache]: Analyzing trace with hash -691947914, now seen corresponding path program 82 times [2024-09-17 18:20:22,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:22,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667508371] [2024-09-17 18:20:22,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:22,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:22,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,894 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:22,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,897 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:22,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:22,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:22,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:22,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:22,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:22,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,906 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:22,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:22,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:22,913 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:22,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667508371] [2024-09-17 18:20:22,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667508371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:22,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951494273] [2024-09-17 18:20:22,913 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:20:22,914 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:22,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:22,915 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:22,916 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-09-17 18:20:22,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:20:22,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:22,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:22,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:23,855 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:23,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:24,331 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:24,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951494273] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:24,332 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:24,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 65 [2024-09-17 18:20:24,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [168271551] [2024-09-17 18:20:24,332 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:24,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-09-17 18:20:24,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:24,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-09-17 18:20:24,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=731, Invalid=3429, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:20:24,334 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:25,843 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-17 18:20:25,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:25,846 INFO L225 Difference]: With dead ends: 312 [2024-09-17 18:20:25,846 INFO L226 Difference]: Without dead ends: 259 [2024-09-17 18:20:25,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 227 SyntacticMatches, 30 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3258 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=739, Invalid=3551, Unknown=0, NotChecked=0, Total=4290 [2024-09-17 18:20:25,847 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 597 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 324 SdHoareTripleChecker+Invalid, 597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 597 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:25,847 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 324 Invalid, 597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 597 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:25,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-17 18:20:26,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-17 18:20:26,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:26,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:26,103 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:26,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:26,103 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:26,103 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.6615384615384616) internal successors, (108), 65 states have internal predecessors, (108), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:26,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:26,103 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:26,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:26,104 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:26,104 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:26,120 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:26,305 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,124 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:26,305 INFO L399 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:26,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:26,305 INFO L85 PathProgramCache]: Analyzing trace with hash 641202037, now seen corresponding path program 83 times [2024-09-17 18:20:26,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:26,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625704880] [2024-09-17 18:20:26,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:26,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:26,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:26,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:26,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:26,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:26,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,858 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:26,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:26,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:26,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:26,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:26,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:26,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:26,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,866 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:26,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:26,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:26,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,870 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:26,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:26,871 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:26,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:26,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625704880] [2024-09-17 18:20:26,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625704880] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:26,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243653733] [2024-09-17 18:20:26,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:20:26,872 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:26,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:26,874 INFO L229 MonitoredProcess]: Starting monitored process 125 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:26,875 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2024-09-17 18:20:26,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-17 18:20:26,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:26,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:26,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:27,801 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:27,801 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:28,279 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:28,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243653733] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:28,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:28,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 64 [2024-09-17 18:20:28,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648701128] [2024-09-17 18:20:28,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:28,281 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2024-09-17 18:20:28,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:28,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2024-09-17 18:20:28,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=701, Invalid=3331, Unknown=0, NotChecked=0, Total=4032 [2024-09-17 18:20:28,282 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:29,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:29,952 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-17 18:20:29,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:29,952 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:29,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:29,955 INFO L225 Difference]: With dead ends: 317 [2024-09-17 18:20:29,955 INFO L226 Difference]: Without dead ends: 264 [2024-09-17 18:20:29,955 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 228 SyntacticMatches, 30 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3101 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=709, Invalid=3451, Unknown=0, NotChecked=0, Total=4160 [2024-09-17 18:20:29,956 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 505 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 550 SdHoareTripleChecker+Invalid, 870 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:29,956 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 550 Invalid, 870 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-17 18:20:29,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-17 18:20:30,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-17 18:20:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:30,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:30,233 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:30,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:30,233 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:30,233 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.671875) internal successors, (107), 64 states have internal predecessors, (107), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:30,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:30,234 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:30,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:30,234 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:30,234 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:30,250 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:30,438 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-09-17 18:20:30,439 INFO L399 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:30,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:30,439 INFO L85 PathProgramCache]: Analyzing trace with hash 545659542, now seen corresponding path program 84 times [2024-09-17 18:20:30,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:30,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937762805] [2024-09-17 18:20:30,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:30,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:30,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:31,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:31,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:31,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:31,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:31,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:31,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:31,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:31,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:31,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:31,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:31,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:31,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:31,019 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:31,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937762805] [2024-09-17 18:20:31,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937762805] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:31,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708493666] [2024-09-17 18:20:31,019 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:20:31,020 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:31,020 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:31,022 INFO L229 MonitoredProcess]: Starting monitored process 126 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:31,022 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2024-09-17 18:20:31,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-17 18:20:31,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:31,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:31,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:31,934 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:32,420 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:32,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708493666] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:32,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:32,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 63 [2024-09-17 18:20:32,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908300456] [2024-09-17 18:20:32,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:32,421 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-17 18:20:32,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:32,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-17 18:20:32,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=675, Invalid=3231, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 18:20:32,422 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:34,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:34,139 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-17 18:20:34,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:34,140 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:34,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:34,142 INFO L225 Difference]: With dead ends: 320 [2024-09-17 18:20:34,142 INFO L226 Difference]: Without dead ends: 267 [2024-09-17 18:20:34,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 229 SyntacticMatches, 30 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2947 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=683, Invalid=3349, Unknown=0, NotChecked=0, Total=4032 [2024-09-17 18:20:34,143 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 446 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:34,143 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 487 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:34,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-17 18:20:34,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-17 18:20:34,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:34,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:34,404 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:34,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:34,404 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:34,404 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6825396825396826) internal successors, (106), 63 states have internal predecessors, (106), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:34,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:34,405 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:34,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:34,405 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:34,405 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:34,420 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2024-09-17 18:20:34,609 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-09-17 18:20:34,610 INFO L399 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:34,610 INFO L85 PathProgramCache]: Analyzing trace with hash -565801131, now seen corresponding path program 85 times [2024-09-17 18:20:34,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:34,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901900882] [2024-09-17 18:20:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:35,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:35,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:35,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:35,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:35,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:35,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,157 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:35,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:35,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,160 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:35,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,161 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:35,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:35,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:35,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:35,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:35,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,168 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 289 proven. 96 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:35,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901900882] [2024-09-17 18:20:35,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901900882] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:35,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980254070] [2024-09-17 18:20:35,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:20:35,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:35,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:35,170 INFO L229 MonitoredProcess]: Starting monitored process 127 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:35,171 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2024-09-17 18:20:35,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:35,237 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:35,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:36,070 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:36,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:36,563 INFO L134 CoverageAnalysis]: Checked inductivity of 749 backedges. 329 proven. 56 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:36,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980254070] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:36,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:36,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 62 [2024-09-17 18:20:36,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979993849] [2024-09-17 18:20:36,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:36,564 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2024-09-17 18:20:36,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:36,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2024-09-17 18:20:36,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=653, Invalid=3129, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:20:36,566 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:38,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:38,289 INFO L93 Difference]: Finished difference Result 321 states and 368 transitions. [2024-09-17 18:20:38,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:38,290 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:38,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:38,292 INFO L225 Difference]: With dead ends: 321 [2024-09-17 18:20:38,292 INFO L226 Difference]: Without dead ends: 268 [2024-09-17 18:20:38,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 230 SyntacticMatches, 30 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2796 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=661, Invalid=3245, Unknown=0, NotChecked=0, Total=3906 [2024-09-17 18:20:38,293 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:38,293 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 330 Invalid, 566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:38,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 268 states. [2024-09-17 18:20:38,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 268 to 160. [2024-09-17 18:20:38,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:38,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:38,597 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:38,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:38,597 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:38,597 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.6935483870967742) internal successors, (105), 62 states have internal predecessors, (105), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:38,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:38,598 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:38,598 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:38,598 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:38,614 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:38,802 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,127 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:38,803 INFO L399 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:38,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:38,804 INFO L85 PathProgramCache]: Analyzing trace with hash -1571486026, now seen corresponding path program 86 times [2024-09-17 18:20:38,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:38,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169875140] [2024-09-17 18:20:38,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:38,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:38,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:39,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:39,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,351 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:39,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,352 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:39,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:39,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,356 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:39,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,358 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:39,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,360 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:39,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:39,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:39,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:39,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:39,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,366 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:39,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:39,367 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 289 proven. 97 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:39,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:39,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169875140] [2024-09-17 18:20:39,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169875140] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:39,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754141328] [2024-09-17 18:20:39,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:20:39,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:39,368 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:39,373 INFO L229 MonitoredProcess]: Starting monitored process 128 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:39,381 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2024-09-17 18:20:39,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:20:39,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:39,475 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:39,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:40,306 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:40,307 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 750 backedges. 329 proven. 57 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:40,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754141328] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:40,788 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:40,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 61 [2024-09-17 18:20:40,788 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460047177] [2024-09-17 18:20:40,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:40,789 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2024-09-17 18:20:40,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:40,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2024-09-17 18:20:40,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=635, Invalid=3025, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:20:40,791 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:42,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:42,556 INFO L93 Difference]: Finished difference Result 320 states and 367 transitions. [2024-09-17 18:20:42,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:42,557 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:42,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:42,559 INFO L225 Difference]: With dead ends: 320 [2024-09-17 18:20:42,559 INFO L226 Difference]: Without dead ends: 267 [2024-09-17 18:20:42,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 231 SyntacticMatches, 30 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2648 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=643, Invalid=3139, Unknown=0, NotChecked=0, Total=3782 [2024-09-17 18:20:42,560 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 6 mSDsluCounter, 240 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 281 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:42,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 281 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:42,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2024-09-17 18:20:42,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 160. [2024-09-17 18:20:42,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:42,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:42,848 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:42,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:42,849 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:42,849 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.7049180327868851) internal successors, (104), 61 states have internal predecessors, (104), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:42,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:42,849 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:42,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:42,850 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:42,850 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:42,867 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:43,050 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:43,051 INFO L399 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:43,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:43,051 INFO L85 PathProgramCache]: Analyzing trace with hash 1859755829, now seen corresponding path program 87 times [2024-09-17 18:20:43,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:43,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457791696] [2024-09-17 18:20:43,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:43,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:43,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:43,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:43,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:43,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:43,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:43,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:43,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:43,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:43,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:43,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:43,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:43,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:43,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:43,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:43,605 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 289 proven. 100 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:43,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457791696] [2024-09-17 18:20:43,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457791696] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:43,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459390768] [2024-09-17 18:20:43,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:20:43,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:43,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:43,607 INFO L229 MonitoredProcess]: Starting monitored process 129 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:43,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Waiting until timeout for monitored process [2024-09-17 18:20:43,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2024-09-17 18:20:43,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:43,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:43,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:44,468 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:44,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:44,947 INFO L134 CoverageAnalysis]: Checked inductivity of 753 backedges. 329 proven. 60 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:44,947 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459390768] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:44,947 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:44,948 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 60 [2024-09-17 18:20:44,948 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17439231] [2024-09-17 18:20:44,948 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:44,948 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-17 18:20:44,948 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:44,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-17 18:20:44,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=621, Invalid=2919, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:20:44,950 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:46,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:46,715 INFO L93 Difference]: Finished difference Result 317 states and 364 transitions. [2024-09-17 18:20:46,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:46,716 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:46,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:46,718 INFO L225 Difference]: With dead ends: 317 [2024-09-17 18:20:46,718 INFO L226 Difference]: Without dead ends: 264 [2024-09-17 18:20:46,719 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 232 SyntacticMatches, 30 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2503 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=629, Invalid=3031, Unknown=0, NotChecked=0, Total=3660 [2024-09-17 18:20:46,719 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 401 mSDsCounter, 0 mSdLazyCounter, 560 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 444 SdHoareTripleChecker+Invalid, 560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 560 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:46,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 444 Invalid, 560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 560 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:46,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2024-09-17 18:20:47,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 160. [2024-09-17 18:20:47,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:47,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:47,030 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:47,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:47,030 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:47,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.7166666666666666) internal successors, (103), 60 states have internal predecessors, (103), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:47,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:47,031 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:47,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:47,031 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:47,031 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 10, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:47,048 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (129)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:47,232 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-09-17 18:20:47,232 INFO L399 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:47,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:47,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1831893718, now seen corresponding path program 88 times [2024-09-17 18:20:47,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:47,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083661224] [2024-09-17 18:20:47,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:47,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:47,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:47,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,784 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:47,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,785 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:47,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:47,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:47,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:47,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,790 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:47,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,792 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:47,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:47,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:47,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,797 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:47,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:47,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:47,801 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 289 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:47,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083661224] [2024-09-17 18:20:47,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083661224] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:47,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731490681] [2024-09-17 18:20:47,802 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:20:47,802 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:47,802 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:47,803 INFO L229 MonitoredProcess]: Starting monitored process 130 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:47,804 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Waiting until timeout for monitored process [2024-09-17 18:20:47,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:20:47,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:47,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:47,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:48,655 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:48,656 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:49,141 INFO L134 CoverageAnalysis]: Checked inductivity of 758 backedges. 329 proven. 65 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:49,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731490681] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:49,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:49,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 59 [2024-09-17 18:20:49,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430226356] [2024-09-17 18:20:49,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:49,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-17 18:20:49,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:49,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-17 18:20:49,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2811, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:20:49,144 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:50,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:50,844 INFO L93 Difference]: Finished difference Result 312 states and 359 transitions. [2024-09-17 18:20:50,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:50,844 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:50,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:50,847 INFO L225 Difference]: With dead ends: 312 [2024-09-17 18:20:50,847 INFO L226 Difference]: Without dead ends: 259 [2024-09-17 18:20:50,847 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 233 SyntacticMatches, 30 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=619, Invalid=2921, Unknown=0, NotChecked=0, Total=3540 [2024-09-17 18:20:50,847 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 457 mSDsCounter, 0 mSdLazyCounter, 557 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 500 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:50,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 500 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 557 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:20:50,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2024-09-17 18:20:51,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 160. [2024-09-17 18:20:51,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:51,147 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:51,147 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:51,147 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.728813559322034) internal successors, (102), 59 states have internal predecessors, (102), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:51,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:51,148 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:51,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:51,148 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:51,148 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:51,165 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (130)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:51,352 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,130 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:51,353 INFO L399 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:51,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1632688363, now seen corresponding path program 89 times [2024-09-17 18:20:51,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523623503] [2024-09-17 18:20:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:51,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:51,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:51,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:51,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:51,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:51,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:51,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:51,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,926 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:51,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:51,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:51,932 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 289 proven. 112 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:51,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:51,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523623503] [2024-09-17 18:20:51,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523623503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:51,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482165159] [2024-09-17 18:20:51,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:20:51,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:51,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:51,935 INFO L229 MonitoredProcess]: Starting monitored process 131 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:51,936 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Waiting until timeout for monitored process [2024-09-17 18:20:52,006 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2024-09-17 18:20:52,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:52,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:52,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:52,756 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:53,248 INFO L134 CoverageAnalysis]: Checked inductivity of 765 backedges. 329 proven. 72 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:53,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1482165159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:53,248 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:53,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 58 [2024-09-17 18:20:53,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378524330] [2024-09-17 18:20:53,249 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:53,249 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-17 18:20:53,249 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:53,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-17 18:20:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2701, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:20:53,251 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:54,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:54,640 INFO L93 Difference]: Finished difference Result 305 states and 352 transitions. [2024-09-17 18:20:54,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:54,640 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:54,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:54,642 INFO L225 Difference]: With dead ends: 305 [2024-09-17 18:20:54,643 INFO L226 Difference]: Without dead ends: 252 [2024-09-17 18:20:54,643 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 234 SyntacticMatches, 30 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2222 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=613, Invalid=2809, Unknown=0, NotChecked=0, Total=3422 [2024-09-17 18:20:54,643 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 325 mSDsCounter, 0 mSdLazyCounter, 467 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 368 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:54,643 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 368 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 467 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:54,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2024-09-17 18:20:54,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 160. [2024-09-17 18:20:54,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:54,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:54,926 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:54,926 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:54,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.7413793103448276) internal successors, (101), 58 states have internal predecessors, (101), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:54,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:54,927 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:54,927 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 12, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:54,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (131)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:55,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,131 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:55,132 INFO L399 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:55,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:55,132 INFO L85 PathProgramCache]: Analyzing trace with hash -358975754, now seen corresponding path program 90 times [2024-09-17 18:20:55,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:55,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669769184] [2024-09-17 18:20:55,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:55,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:55,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:55,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:55,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:55,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:55,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:55,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:55,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:55,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:55,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:55,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,623 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:55,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:55,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:55,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:55,628 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 289 proven. 121 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:55,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669769184] [2024-09-17 18:20:55,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669769184] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:55,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936175338] [2024-09-17 18:20:55,628 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 18:20:55,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:55,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:55,630 INFO L229 MonitoredProcess]: Starting monitored process 132 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:55,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Waiting until timeout for monitored process [2024-09-17 18:20:55,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2024-09-17 18:20:55,700 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:20:55,701 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:55,703 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:56,331 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:56,332 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:20:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 774 backedges. 329 proven. 81 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:56,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936175338] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:20:56,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:20:56,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 57 [2024-09-17 18:20:56,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711573260] [2024-09-17 18:20:56,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:20:56,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-17 18:20:56,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:20:56,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-17 18:20:56,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=603, Invalid=2589, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:20:56,760 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:58,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:20:58,104 INFO L93 Difference]: Finished difference Result 296 states and 343 transitions. [2024-09-17 18:20:58,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:20:58,105 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:20:58,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:20:58,107 INFO L225 Difference]: With dead ends: 296 [2024-09-17 18:20:58,107 INFO L226 Difference]: Without dead ends: 243 [2024-09-17 18:20:58,108 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 235 SyntacticMatches, 30 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2086 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=611, Invalid=2695, Unknown=0, NotChecked=0, Total=3306 [2024-09-17 18:20:58,108 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 6 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 462 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 462 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 462 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:20:58,109 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 354 Invalid, 462 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 462 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:20:58,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2024-09-17 18:20:58,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 160. [2024-09-17 18:20:58,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:20:58,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:20:58,396 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:20:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:20:58,396 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:20:58,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.7543859649122806) internal successors, (100), 57 states have internal predecessors, (100), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:20:58,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:58,397 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:20:58,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:20:58,397 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:20:58,397 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:20:58,412 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (132)] Forceful destruction successful, exit code 0 [2024-09-17 18:20:58,598 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,132 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:58,598 INFO L399 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:20:58,598 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:20:58,599 INFO L85 PathProgramCache]: Analyzing trace with hash -872077579, now seen corresponding path program 91 times [2024-09-17 18:20:58,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:20:58,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331593876] [2024-09-17 18:20:58,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:20:58,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:20:58,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:20:59,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:20:59,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:20:59,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:20:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:20:59,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:20:59,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:20:59,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:20:59,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:20:59,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:20:59,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:20:59,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:20:59,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:20:59,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:20:59,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:20:59,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,110 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 289 proven. 132 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:59,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:20:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331593876] [2024-09-17 18:20:59,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331593876] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:20:59,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093046353] [2024-09-17 18:20:59,110 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 18:20:59,110 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:20:59,111 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:20:59,112 INFO L229 MonitoredProcess]: Starting monitored process 133 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:20:59,113 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Waiting until timeout for monitored process [2024-09-17 18:20:59,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:20:59,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:20:59,176 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:20:59,793 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:20:59,794 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:00,257 INFO L134 CoverageAnalysis]: Checked inductivity of 785 backedges. 329 proven. 92 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:00,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093046353] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:00,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:00,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 56 [2024-09-17 18:21:00,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130913151] [2024-09-17 18:21:00,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:00,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-17 18:21:00,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:00,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-17 18:21:00,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=605, Invalid=2475, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:21:00,260 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:21:01,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:01,523 INFO L93 Difference]: Finished difference Result 285 states and 332 transitions. [2024-09-17 18:21:01,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:21:01,524 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:21:01,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:01,526 INFO L225 Difference]: With dead ends: 285 [2024-09-17 18:21:01,526 INFO L226 Difference]: Without dead ends: 232 [2024-09-17 18:21:01,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 236 SyntacticMatches, 30 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1953 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=613, Invalid=2579, Unknown=0, NotChecked=0, Total=3192 [2024-09-17 18:21:01,527 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:01,527 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 364 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:21:01,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2024-09-17 18:21:01,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 160. [2024-09-17 18:21:01,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 126 states have (on average 1.1349206349206349) internal successors, (143), 127 states have internal predecessors, (143), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:21:01,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 176 transitions. [2024-09-17 18:21:01,854 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 176 transitions. Word has length 128 [2024-09-17 18:21:01,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:01,854 INFO L474 AbstractCegarLoop]: Abstraction has 160 states and 176 transitions. [2024-09-17 18:21:01,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.7678571428571428) internal successors, (99), 56 states have internal predecessors, (99), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:21:01,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:01,854 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 176 transitions. [2024-09-17 18:21:01,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-17 18:21:01,855 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:01,855 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:01,870 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (133)] Ended with exit code 0 [2024-09-17 18:21:02,058 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,133 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:02,058 INFO L399 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:02,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:02,059 INFO L85 PathProgramCache]: Analyzing trace with hash -57345258, now seen corresponding path program 14 times [2024-09-17 18:21:02,059 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:02,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066920083] [2024-09-17 18:21:02,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:02,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:02,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:02,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-17 18:21:02,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-17 18:21:02,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-17 18:21:02,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 47 [2024-09-17 18:21:02,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,615 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2024-09-17 18:21:02,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,617 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-17 18:21:02,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2024-09-17 18:21:02,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-17 18:21:02,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,620 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2024-09-17 18:21:02,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,621 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 89 [2024-09-17 18:21:02,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2024-09-17 18:21:02,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-17 18:21:02,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2024-09-17 18:21:02,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,626 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 117 [2024-09-17 18:21:02,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:02,627 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 289 proven. 145 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066920083] [2024-09-17 18:21:02,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066920083] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:02,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944557285] [2024-09-17 18:21:02,628 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:21:02,628 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:02,630 INFO L229 MonitoredProcess]: Starting monitored process 134 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:21:02,631 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Waiting until timeout for monitored process [2024-09-17 18:21:02,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:21:02,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:02,699 INFO L262 TraceCheckSpWp]: Trace formula consists of 318 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-17 18:21:02,701 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:03,396 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:03,397 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:03,895 INFO L134 CoverageAnalysis]: Checked inductivity of 798 backedges. 329 proven. 105 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:03,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944557285] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:03,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:03,896 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 55 [2024-09-17 18:21:03,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717826265] [2024-09-17 18:21:03,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:03,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2024-09-17 18:21:03,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:03,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2024-09-17 18:21:03,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2024-09-17 18:21:03,897 INFO L87 Difference]: Start difference. First operand 160 states and 176 transitions. Second operand has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:21:04,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:04,955 INFO L93 Difference]: Finished difference Result 275 states and 323 transitions. [2024-09-17 18:21:04,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-17 18:21:04,956 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) Word has length 128 [2024-09-17 18:21:04,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:04,958 INFO L225 Difference]: With dead ends: 275 [2024-09-17 18:21:04,958 INFO L226 Difference]: Without dead ends: 222 [2024-09-17 18:21:04,959 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 237 SyntacticMatches, 30 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=619, Invalid=2461, Unknown=0, NotChecked=0, Total=3080 [2024-09-17 18:21:04,959 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 6 mSDsluCounter, 524 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 567 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:04,959 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 567 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-17 18:21:04,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2024-09-17 18:21:05,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 162. [2024-09-17 18:21:05,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 128 states have (on average 1.140625) internal successors, (146), 129 states have internal predecessors, (146), 17 states have call successors, (17), 17 states have call predecessors, (17), 16 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-17 18:21:05,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 179 transitions. [2024-09-17 18:21:05,279 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 179 transitions. Word has length 128 [2024-09-17 18:21:05,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:05,280 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 179 transitions. [2024-09-17 18:21:05,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.7818181818181817) internal successors, (98), 55 states have internal predecessors, (98), 31 states have call successors, (32), 2 states have call predecessors, (32), 1 states have return successors, (30), 30 states have call predecessors, (30), 30 states have call successors, (30) [2024-09-17 18:21:05,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:05,280 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 179 transitions. [2024-09-17 18:21:05,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-17 18:21:05,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:05,281 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:05,297 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (134)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:05,481 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2024-09-17 18:21:05,482 INFO L399 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:05,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:05,482 INFO L85 PathProgramCache]: Analyzing trace with hash 1636582049, now seen corresponding path program 28 times [2024-09-17 18:21:05,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:05,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859308869] [2024-09-17 18:21:05,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:05,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:05,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,811 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:05,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:21:05,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:21:05,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:21:05,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,816 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:21:05,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,817 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:21:05,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:21:05,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:21:05,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:21:05,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-17 18:21:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-17 18:21:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-17 18:21:05,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,840 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-17 18:21:05,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 18:21:05,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,842 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-17 18:21:05,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:05,844 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 133 proven. 316 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:05,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:05,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859308869] [2024-09-17 18:21:05,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859308869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:05,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095333900] [2024-09-17 18:21:05,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:21:05,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:05,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:05,847 INFO L229 MonitoredProcess]: Starting monitored process 135 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:21:05,848 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Waiting until timeout for monitored process [2024-09-17 18:21:05,919 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:21:05,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:05,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-17 18:21:05,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:06,010 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:06,010 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:06,355 INFO L134 CoverageAnalysis]: Checked inductivity of 813 backedges. 148 proven. 301 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2024-09-17 18:21:06,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2095333900] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:06,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:06,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 23 [2024-09-17 18:21:06,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790966630] [2024-09-17 18:21:06,356 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:06,356 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 18:21:06,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:06,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 18:21:06,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=166, Invalid=340, Unknown=0, NotChecked=0, Total=506 [2024-09-17 18:21:06,356 INFO L87 Difference]: Start difference. First operand 162 states and 179 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:21:06,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:21:06,873 INFO L93 Difference]: Finished difference Result 175 states and 193 transitions. [2024-09-17 18:21:06,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 18:21:06,874 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) Word has length 129 [2024-09-17 18:21:06,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:21:06,877 INFO L225 Difference]: With dead ends: 175 [2024-09-17 18:21:06,877 INFO L226 Difference]: Without dead ends: 173 [2024-09-17 18:21:06,877 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 322 GetRequests, 268 SyntacticMatches, 32 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=172, Invalid=380, Unknown=0, NotChecked=0, Total=552 [2024-09-17 18:21:06,877 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 34 mSDsluCounter, 299 mSDsCounter, 0 mSdLazyCounter, 297 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 344 SdHoareTripleChecker+Invalid, 315 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:21:06,878 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 344 Invalid, 315 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 297 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:21:06,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-17 18:21:07,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 169. [2024-09-17 18:21:07,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 134 states have internal predecessors, (151), 18 states have call successors, (18), 18 states have call predecessors, (18), 17 states have return successors, (17), 16 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-17 18:21:07,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 186 transitions. [2024-09-17 18:21:07,202 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 186 transitions. Word has length 129 [2024-09-17 18:21:07,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:21:07,203 INFO L474 AbstractCegarLoop]: Abstraction has 169 states and 186 transitions. [2024-09-17 18:21:07,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 21 states have internal predecessors, (66), 16 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:21:07,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:07,203 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 186 transitions. [2024-09-17 18:21:07,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2024-09-17 18:21:07,204 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:21:07,204 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:21:07,222 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (135)] Forceful destruction successful, exit code 0 [2024-09-17 18:21:07,404 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2024-09-17 18:21:07,404 INFO L399 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:21:07,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:21:07,405 INFO L85 PathProgramCache]: Analyzing trace with hash 1540394903, now seen corresponding path program 29 times [2024-09-17 18:21:07,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:21:07,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175847662] [2024-09-17 18:21:07,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:21:07,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:21:07,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,086 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:21:08,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-17 18:21:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,089 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-17 18:21:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 41 [2024-09-17 18:21:08,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-17 18:21:08,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 55 [2024-09-17 18:21:08,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-17 18:21:08,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 69 [2024-09-17 18:21:08,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,097 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-17 18:21:08,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-17 18:21:08,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,100 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2024-09-17 18:21:08,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 97 [2024-09-17 18:21:08,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2024-09-17 18:21:08,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-17 18:21:08,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2024-09-17 18:21:08,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 125 [2024-09-17 18:21:08,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:21:08,108 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 332 proven. 163 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-17 18:21:08,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:21:08,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175847662] [2024-09-17 18:21:08,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175847662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:21:08,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219529597] [2024-09-17 18:21:08,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 18:21:08,109 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:21:08,109 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:21:08,111 INFO L229 MonitoredProcess]: Starting monitored process 136 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-17 18:21:08,112 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (136)] Waiting until timeout for monitored process [2024-09-17 18:21:08,190 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2024-09-17 18:21:08,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:21:08,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-17 18:21:08,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:21:09,308 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-17 18:21:09,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:21:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 915 backedges. 375 proven. 120 refuted. 0 times theorem prover too weak. 420 trivial. 0 not checked. [2024-09-17 18:21:09,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219529597] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:21:09,886 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:21:09,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 73 [2024-09-17 18:21:09,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770626965] [2024-09-17 18:21:09,886 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:21:09,887 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-17 18:21:09,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:21:09,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-17 18:21:09,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=997, Invalid=4259, Unknown=0, NotChecked=0, Total=5256 [2024-09-17 18:21:09,889 INFO L87 Difference]: Start difference. First operand 169 states and 186 transitions. Second operand has 73 states, 73 states have (on average 1.6164383561643836) internal successors, (118), 73 states have internal predecessors, (118), 33 states have call successors, (34), 2 states have call predecessors, (34), 1 states have return successors, (32), 32 states have call predecessors, (32), 32 states have call successors, (32)