./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.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/nla-digbench-scaling/divbin2_unwindbound100.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 f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b --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 18:38:19,913 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 18:38:19,976 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 18:38:19,982 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 18:38:19,983 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 18:38:20,010 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 18:38:20,010 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 18:38:20,011 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 18:38:20,011 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 18:38:20,015 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 18:38:20,015 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 18:38:20,015 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 18:38:20,016 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 18:38:20,016 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 18:38:20,016 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 18:38:20,017 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 18:38:20,017 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 18:38:20,017 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 18:38:20,017 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 18:38:20,017 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 18:38:20,018 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 18:38:20,018 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 18:38:20,018 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 18:38:20,019 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 18:38:20,019 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 18:38:20,019 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 18:38:20,019 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 18:38:20,020 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 18:38:20,020 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 18:38:20,020 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 18:38:20,020 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 18:38:20,021 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 18:38:20,021 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:38:20,021 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 18:38:20,021 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 18:38:20,022 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 18:38:20,022 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 18:38:20,022 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 18:38:20,022 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 18:38:20,023 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 18:38:20,023 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 18:38:20,023 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 18:38:20,023 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> f26bb7c01ef96852e13a34034142a6eda53bd301e224804a84caad37f299321b Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 18:38:20,255 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 18:38:20,277 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 18:38:20,281 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 18:38:20,282 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 18:38:20,297 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 18:38:20,298 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-17 18:38:21,696 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 18:38:21,862 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 18:38:21,862 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i [2024-09-17 18:38:21,869 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/a824a3228/3667ce42aa7f4aa392b24b56164123cb/FLAGa28bb5fe2 [2024-09-17 18:38:21,891 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/a824a3228/3667ce42aa7f4aa392b24b56164123cb [2024-09-17 18:38:21,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 18:38:21,895 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 18:38:21,896 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 18:38:21,896 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 18:38:21,915 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 18:38:21,916 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:38:21" (1/1) ... [2024-09-17 18:38:21,917 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@97d2e00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:21, skipping insertion in model container [2024-09-17 18:38:21,917 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 06:38:21" (1/1) ... [2024-09-17 18:38:21,949 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 18:38:22,091 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-17 18:38:22,109 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:38:22,120 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 18:38:22,131 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/nla-digbench-scaling/divbin2_unwindbound100.i[951,964] [2024-09-17 18:38:22,143 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 18:38:22,160 INFO L204 MainTranslator]: Completed translation [2024-09-17 18:38:22,160 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22 WrapperNode [2024-09-17 18:38:22,161 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 18:38:22,161 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 18:38:22,162 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 18:38:22,162 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 18:38:22,168 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,175 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,180 INFO L138 Inliner]: procedures = 16, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 18:38:22,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 18:38:22,181 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 18:38:22,181 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 18:38:22,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 18:38:22,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,193 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,209 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 18:38:22,213 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,214 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,216 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,221 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,222 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,223 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,224 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 18:38:22,229 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 18:38:22,229 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 18:38:22,229 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 18:38:22,230 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (1/1) ... [2024-09-17 18:38:22,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 18:38:22,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:38:22,265 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 18:38:22,269 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 18:38:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 18:38:22,313 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 18:38:22,313 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 18:38:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 18:38:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 18:38:22,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 18:38:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 18:38:22,314 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 18:38:22,314 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-17 18:38:22,315 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-17 18:38:22,377 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 18:38:22,379 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 18:38:22,559 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-17 18:38:22,559 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 18:38:22,588 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 18:38:22,588 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-17 18:38:22,589 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:38:22 BoogieIcfgContainer [2024-09-17 18:38:22,589 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 18:38:22,591 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 18:38:22,591 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 18:38:22,594 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 18:38:22,595 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 06:38:21" (1/3) ... [2024-09-17 18:38:22,596 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7845a7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:38:22, skipping insertion in model container [2024-09-17 18:38:22,596 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 06:38:22" (2/3) ... [2024-09-17 18:38:22,597 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7845a7ec and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 06:38:22, skipping insertion in model container [2024-09-17 18:38:22,598 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 06:38:22" (3/3) ... [2024-09-17 18:38:22,599 INFO L112 eAbstractionObserver]: Analyzing ICFG divbin2_unwindbound100.i [2024-09-17 18:38:22,613 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 18:38:22,613 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 18:38:22,662 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 18:38:22,668 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;@6b3a0338, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 18:38:22,668 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 18:38:22,672 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 18:38:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-17 18:38:22,680 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:22,681 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:22,681 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:22,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:22,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1996614108, now seen corresponding path program 1 times [2024-09-17 18:38:22,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:22,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861232348] [2024-09-17 18:38:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:22,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:22,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:22,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:38:22,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:22,843 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 18:38:22,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:38:22,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861232348] [2024-09-17 18:38:22,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861232348] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:38:22,847 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:38:22,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-17 18:38:22,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117746799] [2024-09-17 18:38:22,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:38:22,853 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-17 18:38:22,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:38:22,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-17 18:38:22,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:38:22,881 INFO L87 Difference]: Start difference. First operand has 24 states, 15 states have (on average 1.6) internal successors, (24), 16 states have internal predecessors, (24), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:22,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:38:22,961 INFO L93 Difference]: Finished difference Result 41 states and 57 transitions. [2024-09-17 18:38:22,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-17 18:38:22,964 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-17 18:38:22,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:38:22,972 INFO L225 Difference]: With dead ends: 41 [2024-09-17 18:38:22,972 INFO L226 Difference]: Without dead ends: 21 [2024-09-17 18:38:22,975 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-17 18:38:22,980 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 6 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:38:22,981 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 34 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:38:22,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-17 18:38:23,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 20. [2024-09-17 18:38:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:38:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 25 transitions. [2024-09-17 18:38:23,021 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 25 transitions. Word has length 11 [2024-09-17 18:38:23,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:38:23,022 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 25 transitions. [2024-09-17 18:38:23,023 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:23,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,025 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 25 transitions. [2024-09-17 18:38:23,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-17 18:38:23,025 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:23,026 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:23,026 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 18:38:23,027 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:23,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1251497910, now seen corresponding path program 1 times [2024-09-17 18:38:23,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:23,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928692636] [2024-09-17 18:38:23,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:23,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:23,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:23,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:38:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:23,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:38:23,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:38:23,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928692636] [2024-09-17 18:38:23,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928692636] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:38:23,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:38:23,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 18:38:23,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001757180] [2024-09-17 18:38:23,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:38:23,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:38:23,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:38:23,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:38:23,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:38:23,227 INFO L87 Difference]: Start difference. First operand 20 states and 25 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:23,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:38:23,315 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-17 18:38:23,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 18:38:23,316 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-17 18:38:23,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:38:23,317 INFO L225 Difference]: With dead ends: 34 [2024-09-17 18:38:23,317 INFO L226 Difference]: Without dead ends: 22 [2024-09-17 18:38:23,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:38:23,318 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 6 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:38:23,319 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 53 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:38:23,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-17 18:38:23,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-17 18:38:23,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 15 states have (on average 1.4) internal successors, (21), 16 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:38:23,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2024-09-17 18:38:23,333 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 13 [2024-09-17 18:38:23,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:38:23,333 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2024-09-17 18:38:23,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 3 states have internal predecessors, (9), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:23,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2024-09-17 18:38:23,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-17 18:38:23,335 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:23,335 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:23,335 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-17 18:38:23,336 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:23,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,336 INFO L85 PathProgramCache]: Analyzing trace with hash -239317110, now seen corresponding path program 1 times [2024-09-17 18:38:23,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:23,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895119424] [2024-09-17 18:38:23,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:23,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:38:23,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1498792754] [2024-09-17 18:38:23,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:23,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:38:23,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:38:23,372 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 18:38:23,374 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 18:38:23,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:23,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:38:23,422 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:38:23,534 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 18:38:23,535 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 18:38:23,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:38:23,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895119424] [2024-09-17 18:38:23,536 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:38:23,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1498792754] [2024-09-17 18:38:23,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1498792754] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:38:23,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:38:23,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 18:38:23,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293760970] [2024-09-17 18:38:23,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:38:23,539 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 18:38:23,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:38:23,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 18:38:23,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:38:23,541 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:23,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:38:23,636 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2024-09-17 18:38:23,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:38:23,637 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-17 18:38:23,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:38:23,638 INFO L225 Difference]: With dead ends: 34 [2024-09-17 18:38:23,638 INFO L226 Difference]: Without dead ends: 31 [2024-09-17 18:38:23,639 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-17 18:38:23,641 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 8 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 35 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 35 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:38:23,642 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 59 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 35 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:38:23,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-17 18:38:23,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-17 18:38:23,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:38:23,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-17 18:38:23,652 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 14 [2024-09-17 18:38:23,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:38:23,652 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-17 18:38:23,652 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-17 18:38:23,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,653 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-17 18:38:23,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-17 18:38:23,653 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:23,654 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:23,671 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 18:38:23,854 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:38:23,855 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:23,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:23,855 INFO L85 PathProgramCache]: Analyzing trace with hash 726925940, now seen corresponding path program 1 times [2024-09-17 18:38:23,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:23,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179705803] [2024-09-17 18:38:23,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:23,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:23,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:38:24,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,105 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 10 [2024-09-17 18:38:24,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,112 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:38:24,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:38:24,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179705803] [2024-09-17 18:38:24,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179705803] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 18:38:24,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 18:38:24,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-17 18:38:24,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121481090] [2024-09-17 18:38:24,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 18:38:24,119 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-17 18:38:24,119 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:38:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-17 18:38:24,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-17 18:38:24,120 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:38:24,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:38:24,186 INFO L93 Difference]: Finished difference Result 57 states and 69 transitions. [2024-09-17 18:38:24,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 18:38:24,187 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2024-09-17 18:38:24,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:38:24,188 INFO L225 Difference]: With dead ends: 57 [2024-09-17 18:38:24,188 INFO L226 Difference]: Without dead ends: 32 [2024-09-17 18:38:24,188 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-17 18:38:24,189 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 6 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 18:38:24,190 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 36 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 18:38:24,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-17 18:38:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-17 18:38:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 24 states have internal predecessors, (30), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:38:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2024-09-17 18:38:24,199 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2024-09-17 18:38:24,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:38:24,200 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2024-09-17 18:38:24,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:38:24,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:24,201 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2024-09-17 18:38:24,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 18:38:24,202 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:24,202 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:24,202 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-17 18:38:24,203 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:24,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1153424271, now seen corresponding path program 1 times [2024-09-17 18:38:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:24,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629587687] [2024-09-17 18:38:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:24,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,348 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:38:24,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-17 18:38:24,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,357 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:38:24,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:38:24,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629587687] [2024-09-17 18:38:24,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629587687] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:38:24,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099622521] [2024-09-17 18:38:24,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:24,358 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:38:24,358 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:38:24,360 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 18:38:24,361 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 18:38:24,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:24,409 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-17 18:38:24,411 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:38:24,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 18:38:24,438 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:38:24,511 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:38:24,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099622521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:38:24,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:38:24,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5, 5] total 11 [2024-09-17 18:38:24,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530327750] [2024-09-17 18:38:24,513 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:38:24,514 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-17 18:38:24,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:38:24,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-17 18:38:24,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-09-17 18:38:24,515 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:38:24,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:38:24,635 INFO L93 Difference]: Finished difference Result 72 states and 88 transitions. [2024-09-17 18:38:24,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 18:38:24,636 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 25 [2024-09-17 18:38:24,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:38:24,637 INFO L225 Difference]: With dead ends: 72 [2024-09-17 18:38:24,639 INFO L226 Difference]: Without dead ends: 51 [2024-09-17 18:38:24,640 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2024-09-17 18:38:24,641 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 22 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:38:24,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 82 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:38:24,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-17 18:38:24,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2024-09-17 18:38:24,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 31 states have (on average 1.2903225806451613) internal successors, (40), 32 states have internal predecessors, (40), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:38:24,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-17 18:38:24,656 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 25 [2024-09-17 18:38:24,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:38:24,657 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-17 18:38:24,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:38:24,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:24,658 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-17 18:38:24,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-17 18:38:24,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:38:24,659 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:38:24,676 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 18:38:24,863 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:38:24,864 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:38:24,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:38:24,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1935504499, now seen corresponding path program 1 times [2024-09-17 18:38:24,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:38:24,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889090993] [2024-09-17 18:38:24,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:24,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:38:24,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:38:24,927 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1876805683] [2024-09-17 18:38:24,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:38:24,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:38:24,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:38:24,932 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 18:38:24,962 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 18:38:25,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:38:25,080 INFO L262 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-17 18:38:25,084 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:38:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 18:38:25,391 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:38:52,855 WARN L293 SmtUtils]: Spent 16.04s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-17 18:38:56,863 WARN L876 $PredicateComparison]: unable to prove that (let ((.cse0 (mod c_main_~A~0 4294967296)) (.cse1 (mod c_main_~b~0 2147483648))) (or (= .cse0 (mod (+ c_main_~r~0 (* c_main_~q~0 2 .cse1)) 4294967296)) (not (= .cse0 (mod (+ (* c_main_~b~0 c_main_~q~0 2) c_main_~r~0) 4294967296))) (< (* 2 .cse1) (+ 1 (mod c_main_~r~0 4294967296))))) is different from true [2024-09-17 18:39:20,957 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-17 18:39:45,059 WARN L293 SmtUtils]: Spent 16.02s on a formula simplification that was a NOOP. DAG size: 11 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify) [2024-09-17 18:39:45,067 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2024-09-17 18:39:45,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:39:45,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889090993] [2024-09-17 18:39:45,067 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:39:45,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1876805683] [2024-09-17 18:39:45,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1876805683] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:39:45,068 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-17 18:39:45,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2024-09-17 18:39:45,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374936387] [2024-09-17 18:39:45,068 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-17 18:39:45,068 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:39:45,069 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:39:45,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:39:45,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=186, Unknown=1, NotChecked=28, Total=272 [2024-09-17 18:39:45,070 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:39:49,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:39:53,314 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:39:57,560 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:40:01,571 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-17 18:40:02,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:40:02,752 INFO L93 Difference]: Finished difference Result 85 states and 108 transitions. [2024-09-17 18:40:02,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 18:40:02,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 26 [2024-09-17 18:40:02,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:40:02,755 INFO L225 Difference]: With dead ends: 85 [2024-09-17 18:40:02,755 INFO L226 Difference]: Without dead ends: 80 [2024-09-17 18:40:02,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=74, Invalid=235, Unknown=1, NotChecked=32, Total=342 [2024-09-17 18:40:02,757 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 27 mSDsluCounter, 214 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 10 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 17.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 302 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 81 IncrementalHoareTripleChecker+Unchecked, 17.4s IncrementalHoareTripleChecker+Time [2024-09-17 18:40:02,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 239 Invalid, 302 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 207 Invalid, 4 Unknown, 81 Unchecked, 17.4s Time] [2024-09-17 18:40:02,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2024-09-17 18:40:02,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2024-09-17 18:40:02,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 61 states have (on average 1.2295081967213115) internal successors, (75), 64 states have internal predecessors, (75), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 8 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-17 18:40:02,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 97 transitions. [2024-09-17 18:40:02,779 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 97 transitions. Word has length 26 [2024-09-17 18:40:02,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:40:02,780 INFO L474 AbstractCegarLoop]: Abstraction has 79 states and 97 transitions. [2024-09-17 18:40:02,780 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 15 states have internal predecessors, (35), 5 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-17 18:40:02,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:40:02,781 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 97 transitions. [2024-09-17 18:40:02,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-17 18:40:02,783 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:40:02,783 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:40:02,791 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 18:40:02,986 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 18:40:02,988 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:40:02,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:40:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash 1306939949, now seen corresponding path program 2 times [2024-09-17 18:40:02,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:40:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583200626] [2024-09-17 18:40:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:40:02,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:40:03,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:40:03,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [614529215] [2024-09-17 18:40:03,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:40:03,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:40:03,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:40:03,042 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 18:40:03,045 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 18:40:03,158 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:40:03,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:40:03,160 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 18:40:03,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:40:03,528 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:40:03,528 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:40:12,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:40:12,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583200626] [2024-09-17 18:40:12,251 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-17 18:40:12,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614529215] [2024-09-17 18:40:12,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [614529215] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:40:12,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-17 18:40:12,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12] total 12 [2024-09-17 18:40:12,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443237217] [2024-09-17 18:40:12,252 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-17 18:40:12,252 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-17 18:40:12,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:40:12,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-17 18:40:12,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=182, Unknown=1, NotChecked=0, Total=240 [2024-09-17 18:40:12,253 INFO L87 Difference]: Start difference. First operand 79 states and 97 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:40:12,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:40:12,523 INFO L93 Difference]: Finished difference Result 123 states and 147 transitions. [2024-09-17 18:40:12,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 18:40:12,524 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 32 [2024-09-17 18:40:12,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:40:12,527 INFO L225 Difference]: With dead ends: 123 [2024-09-17 18:40:12,527 INFO L226 Difference]: Without dead ends: 120 [2024-09-17 18:40:12,529 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2024-09-17 18:40:12,530 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 14 mSDsluCounter, 191 mSDsCounter, 0 mSdLazyCounter, 188 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 188 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:40:12,530 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 218 Invalid, 202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 188 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:40:12,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2024-09-17 18:40:12,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2024-09-17 18:40:12,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 86 states have (on average 1.197674418604651) internal successors, (103), 91 states have internal predecessors, (103), 17 states have call successors, (17), 9 states have call predecessors, (17), 8 states have return successors, (15), 11 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-17 18:40:12,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 135 transitions. [2024-09-17 18:40:12,566 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 135 transitions. Word has length 32 [2024-09-17 18:40:12,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:40:12,566 INFO L474 AbstractCegarLoop]: Abstraction has 112 states and 135 transitions. [2024-09-17 18:40:12,566 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 11 states have internal predecessors, (24), 3 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 18:40:12,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:40:12,567 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 135 transitions. [2024-09-17 18:40:12,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-17 18:40:12,570 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:40:12,571 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:40:12,579 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-17 18:40:12,775 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:40:12,776 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:40:12,776 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:40:12,776 INFO L85 PathProgramCache]: Analyzing trace with hash -2037540399, now seen corresponding path program 3 times [2024-09-17 18:40:12,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:40:12,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339224370] [2024-09-17 18:40:12,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:40:12,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:40:12,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:40:13,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:40:13,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:40:13,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 13 [2024-09-17 18:40:13,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:40:13,252 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-17 18:40:13,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:40:13,262 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:40:13,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:40:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339224370] [2024-09-17 18:40:13,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339224370] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:40:13,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280043542] [2024-09-17 18:40:13,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 18:40:13,263 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:40:13,263 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:40:13,264 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 18:40:13,266 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 18:42:07,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-17 18:42:07,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:42:07,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 18:42:07,786 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:42:07,917 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:42:07,918 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:42:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 11 proven. 7 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-17 18:42:08,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280043542] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:42:08,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:42:08,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 7] total 16 [2024-09-17 18:42:08,280 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074845688] [2024-09-17 18:42:08,280 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:42:08,281 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-17 18:42:08,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:42:08,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-17 18:42:08,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2024-09-17 18:42:08,282 INFO L87 Difference]: Start difference. First operand 112 states and 135 transitions. Second operand has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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 18:42:08,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:42:08,454 INFO L93 Difference]: Finished difference Result 137 states and 162 transitions. [2024-09-17 18:42:08,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 18:42:08,454 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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 35 [2024-09-17 18:42:08,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:42:08,457 INFO L225 Difference]: With dead ends: 137 [2024-09-17 18:42:08,457 INFO L226 Difference]: Without dead ends: 69 [2024-09-17 18:42:08,458 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:42:08,460 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 9 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 18:42:08,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 123 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 18:42:08,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-17 18:42:08,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 64. [2024-09-17 18:42:08,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 49 states have (on average 1.183673469387755) internal successors, (58), 52 states have internal predecessors, (58), 9 states have call successors, (9), 6 states have call predecessors, (9), 5 states have return successors, (7), 5 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 18:42:08,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 74 transitions. [2024-09-17 18:42:08,488 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 74 transitions. Word has length 35 [2024-09-17 18:42:08,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:42:08,489 INFO L474 AbstractCegarLoop]: Abstraction has 64 states and 74 transitions. [2024-09-17 18:42:08,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.125) internal successors, (50), 15 states have internal predecessors, (50), 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 18:42:08,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:42:08,489 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 74 transitions. [2024-09-17 18:42:08,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-17 18:42:08,490 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:42:08,490 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:42:08,516 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 18:42:08,691 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-17 18:42:08,691 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:42:08,691 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:42:08,691 INFO L85 PathProgramCache]: Analyzing trace with hash 201138440, now seen corresponding path program 2 times [2024-09-17 18:42:08,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:42:08,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117065469] [2024-09-17 18:42:08,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:42:08,692 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:42:08,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:42:08,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 18:42:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:42:08,853 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-17 18:42:08,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 18:42:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:42:08,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 18:42:08,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117065469] [2024-09-17 18:42:08,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117065469] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 18:42:08,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140116839] [2024-09-17 18:42:08,856 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 18:42:08,856 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:42:08,857 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:42:08,858 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 18:42:08,859 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 18:42:08,949 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 18:42:08,949 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:42:08,950 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-17 18:42:08,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:42:08,987 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 18:42:08,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:42:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 2 proven. 26 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 18:42:09,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140116839] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 18:42:09,104 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 18:42:09,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 17 [2024-09-17 18:42:09,104 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41217494] [2024-09-17 18:42:09,104 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 18:42:09,105 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 18:42:09,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 18:42:09,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 18:42:09,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=174, Unknown=0, NotChecked=0, Total=272 [2024-09-17 18:42:09,108 INFO L87 Difference]: Start difference. First operand 64 states and 74 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:42:09,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 18:42:09,512 INFO L93 Difference]: Finished difference Result 252 states and 292 transitions. [2024-09-17 18:42:09,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-17 18:42:09,512 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) Word has length 34 [2024-09-17 18:42:09,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 18:42:09,514 INFO L225 Difference]: With dead ends: 252 [2024-09-17 18:42:09,514 INFO L226 Difference]: Without dead ends: 219 [2024-09-17 18:42:09,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=272, Invalid=720, Unknown=0, NotChecked=0, Total=992 [2024-09-17 18:42:09,515 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 163 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-17 18:42:09,515 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [169 Valid, 120 Invalid, 178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-17 18:42:09,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2024-09-17 18:42:09,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 122. [2024-09-17 18:42:09,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 98 states have (on average 1.1938775510204083) internal successors, (117), 101 states have internal predecessors, (117), 13 states have call successors, (13), 11 states have call predecessors, (13), 10 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-17 18:42:09,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 141 transitions. [2024-09-17 18:42:09,560 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 141 transitions. Word has length 34 [2024-09-17 18:42:09,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 18:42:09,561 INFO L474 AbstractCegarLoop]: Abstraction has 122 states and 141 transitions. [2024-09-17 18:42:09,561 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 5 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-17 18:42:09,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:42:09,561 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 141 transitions. [2024-09-17 18:42:09,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-17 18:42:09,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 18:42:09,562 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 18:42:09,571 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-17 18:42:09,763 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:42:09,763 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 18:42:09,763 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 18:42:09,763 INFO L85 PathProgramCache]: Analyzing trace with hash -870169238, now seen corresponding path program 4 times [2024-09-17 18:42:09,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 18:42:09,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753762420] [2024-09-17 18:42:09,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 18:42:09,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 18:42:09,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-17 18:42:09,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [873582535] [2024-09-17 18:42:09,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 18:42:09,797 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 18:42:09,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 18:42:09,799 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 18:42:09,801 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 18:42:09,934 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 18:42:09,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 18:42:09,935 INFO L262 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-17 18:42:09,937 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 18:42:10,456 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 3 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 18:42:10,456 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 18:42:51,410 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 9 (called from [L 731] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher.simplify)