./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 04d6fb36 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 19:27:10,249 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 19:27:10,311 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 19:27:10,316 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 19:27:10,317 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 19:27:10,344 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 19:27:10,345 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 19:27:10,346 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 19:27:10,346 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 19:27:10,348 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 19:27:10,348 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 19:27:10,348 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 19:27:10,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 19:27:10,349 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 19:27:10,351 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 19:27:10,351 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 19:27:10,352 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 19:27:10,352 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 19:27:10,352 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 19:27:10,352 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 19:27:10,352 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 19:27:10,353 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 19:27:10,354 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 19:27:10,354 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 19:27:10,354 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 19:27:10,354 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 19:27:10,354 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 19:27:10,354 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:27:10,355 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 19:27:10,355 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 19:27:10,356 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 19:27:10,356 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 19:27:10,356 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 19:27:10,357 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 19:27:10,357 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 19:27:10,357 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 19:27:10,357 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 19:27:10,358 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9851f41ad4fb2d0ff96507e8e48f0d2886a8de6481eed845b23377b9fa492b45 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 19:27:10,595 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 19:27:10,613 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 19:27:10,615 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 19:27:10,616 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 19:27:10,620 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 19:27:10,621 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2024-09-15 19:27:11,934 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 19:27:12,111 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 19:27:12,112 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/hard-ll_valuebound2.c [2024-09-15 19:27:12,117 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/6d509fc44/244f80605c614e13b1556a8bdbcf57bc/FLAG10ee699e9 [2024-09-15 19:27:12,126 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/6d509fc44/244f80605c614e13b1556a8bdbcf57bc [2024-09-15 19:27:12,128 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 19:27:12,129 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 19:27:12,130 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 19:27:12,130 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 19:27:12,134 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 19:27:12,135 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,135 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1c00daef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12, skipping insertion in model container [2024-09-15 19:27:12,135 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,151 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 19:27:12,269 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/hard-ll_valuebound2.c[538,551] [2024-09-15 19:27:12,295 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:27:12,306 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 19:27:12,317 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/hard-ll_valuebound2.c[538,551] [2024-09-15 19:27:12,324 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 19:27:12,341 INFO L204 MainTranslator]: Completed translation [2024-09-15 19:27:12,341 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12 WrapperNode [2024-09-15 19:27:12,341 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 19:27:12,343 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 19:27:12,343 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 19:27:12,343 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 19:27:12,348 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,353 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,358 INFO L138 Inliner]: procedures = 14, calls = 17, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 19:27:12,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 19:27:12,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 19:27:12,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 19:27:12,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 19:27:12,367 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,367 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,385 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-15 19:27:12,386 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,386 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,388 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,392 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,395 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,396 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,397 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 19:27:12,397 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 19:27:12,397 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 19:27:12,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 19:27:12,401 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (1/1) ... [2024-09-15 19:27:12,406 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 19:27:12,415 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:12,429 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-15 19:27:12,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-15 19:27:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 19:27:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-15 19:27:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-15 19:27:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 19:27:12,467 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 19:27:12,467 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 19:27:12,468 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 19:27:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 19:27:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 19:27:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 19:27:12,469 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 19:27:12,469 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 19:27:12,522 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 19:27:12,523 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 19:27:12,673 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-15 19:27:12,673 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 19:27:12,697 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 19:27:12,697 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-15 19:27:12,697 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:27:12 BoogieIcfgContainer [2024-09-15 19:27:12,697 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 19:27:12,699 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 19:27:12,699 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 19:27:12,701 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 19:27:12,701 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 07:27:12" (1/3) ... [2024-09-15 19:27:12,702 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47321f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:27:12, skipping insertion in model container [2024-09-15 19:27:12,702 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 07:27:12" (2/3) ... [2024-09-15 19:27:12,703 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@47321f98 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 07:27:12, skipping insertion in model container [2024-09-15 19:27:12,703 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:27:12" (3/3) ... [2024-09-15 19:27:12,704 INFO L112 eAbstractionObserver]: Analyzing ICFG hard-ll_valuebound2.c [2024-09-15 19:27:12,716 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 19:27:12,717 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 19:27:12,754 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 19:27:12,759 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;@592bc85f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 19:27:12,759 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 19:27:12,763 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-15 19:27:12,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:27:12,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:12,772 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:12,773 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:12,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:12,778 INFO L85 PathProgramCache]: Analyzing trace with hash 367441184, now seen corresponding path program 1 times [2024-09-15 19:27:12,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:12,786 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839075615] [2024-09-15 19:27:12,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:12,787 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:12,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:12,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:12,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:12,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:12,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:12,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:12,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:12,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:12,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839075615] [2024-09-15 19:27:12,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839075615] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:12,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:12,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 19:27:12,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833829299] [2024-09-15 19:27:12,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:12,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 19:27:12,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:12,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 19:27:12,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:27:12,960 INFO L87 Difference]: Start difference. First operand has 36 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 19 states have internal predecessors, (28), 12 states have call successors, (12), 4 states have call predecessors, (12), 4 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:27:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:12,984 INFO L93 Difference]: Finished difference Result 66 states and 107 transitions. [2024-09-15 19:27:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 19:27:12,986 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-15 19:27:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:12,991 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:27:12,991 INFO L226 Difference]: Without dead ends: 32 [2024-09-15 19:27:12,994 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 19:27:12,996 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:12,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 44 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:13,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-15 19:27:13,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-15 19:27:13,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 16 states have (on average 1.25) internal successors, (20), 17 states have internal predecessors, (20), 12 states have call successors, (12), 4 states have call predecessors, (12), 3 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 42 transitions. [2024-09-15 19:27:13,029 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 42 transitions. Word has length 27 [2024-09-15 19:27:13,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:13,030 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 42 transitions. [2024-09-15 19:27:13,030 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-15 19:27:13,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,031 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 42 transitions. [2024-09-15 19:27:13,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 19:27:13,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:13,035 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:13,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 19:27:13,035 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:13,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,036 INFO L85 PathProgramCache]: Analyzing trace with hash -781266146, now seen corresponding path program 1 times [2024-09-15 19:27:13,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:13,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320581819] [2024-09-15 19:27:13,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:13,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:13,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:13,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,240 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:13,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:13,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,249 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:13,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:13,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320581819] [2024-09-15 19:27:13,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320581819] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:13,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:13,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:13,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214556409] [2024-09-15 19:27:13,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:13,251 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:13,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:13,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:13,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:13,253 INFO L87 Difference]: Start difference. First operand 32 states and 42 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:27:13,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:13,310 INFO L93 Difference]: Finished difference Result 45 states and 59 transitions. [2024-09-15 19:27:13,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:13,311 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 27 [2024-09-15 19:27:13,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:13,311 INFO L225 Difference]: With dead ends: 45 [2024-09-15 19:27:13,312 INFO L226 Difference]: Without dead ends: 43 [2024-09-15 19:27:13,312 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 [2024-09-15 19:27:13,313 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 26 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 26 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:13,313 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 134 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 26 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:13,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-15 19:27:13,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 36. [2024-09-15 19:27:13,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 20 states have internal predecessors, (23), 12 states have call successors, (12), 5 states have call predecessors, (12), 4 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:13,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 45 transitions. [2024-09-15 19:27:13,329 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 45 transitions. Word has length 27 [2024-09-15 19:27:13,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:13,329 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 45 transitions. [2024-09-15 19:27:13,329 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2024-09-15 19:27:13,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,330 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 45 transitions. [2024-09-15 19:27:13,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 19:27:13,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:13,330 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:13,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 19:27:13,331 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:13,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,331 INFO L85 PathProgramCache]: Analyzing trace with hash 992341126, now seen corresponding path program 1 times [2024-09-15 19:27:13,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:13,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012664610] [2024-09-15 19:27:13,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:13,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:13,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:13,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:13,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:13,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:13,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:13,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,474 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 19:27:13,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:13,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012664610] [2024-09-15 19:27:13,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012664610] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:13,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:13,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:13,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359760610] [2024-09-15 19:27:13,475 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:13,475 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:13,475 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:13,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:13,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:13,476 INFO L87 Difference]: Start difference. First operand 36 states and 45 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:27:13,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:13,539 INFO L93 Difference]: Finished difference Result 49 states and 62 transitions. [2024-09-15 19:27:13,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:13,539 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) Word has length 32 [2024-09-15 19:27:13,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:13,540 INFO L225 Difference]: With dead ends: 49 [2024-09-15 19:27:13,540 INFO L226 Difference]: Without dead ends: 47 [2024-09-15 19:27:13,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:13,541 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 9 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 131 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:13,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 131 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:13,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-15 19:27:13,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 40. [2024-09-15 19:27:13,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 23 states have internal predecessors, (26), 12 states have call successors, (12), 6 states have call predecessors, (12), 5 states have return successors, (10), 10 states have call predecessors, (10), 10 states have call successors, (10) [2024-09-15 19:27:13,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2024-09-15 19:27:13,554 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 32 [2024-09-15 19:27:13,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:13,555 INFO L474 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2024-09-15 19:27:13,555 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (7), 2 states have call predecessors, (7), 1 states have return successors, (5), 2 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-15 19:27:13,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,555 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2024-09-15 19:27:13,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-15 19:27:13,556 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:13,556 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:13,556 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 19:27:13,556 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:13,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,557 INFO L85 PathProgramCache]: Analyzing trace with hash -1500804130, now seen corresponding path program 1 times [2024-09-15 19:27:13,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:13,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441034075] [2024-09-15 19:27:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:13,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:13,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [724924017] [2024-09-15 19:27:13,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:13,590 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:13,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:13,592 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:13,593 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 19:27:13,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:13,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:27:13,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:13,732 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 19:27:13,732 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:27:13,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:13,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441034075] [2024-09-15 19:27:13,733 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:13,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724924017] [2024-09-15 19:27:13,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724924017] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:13,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:13,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:13,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610300757] [2024-09-15 19:27:13,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:13,737 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:13,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:13,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:13,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:13,738 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:27:13,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:13,797 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2024-09-15 19:27:13,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:13,797 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-15 19:27:13,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:13,798 INFO L225 Difference]: With dead ends: 66 [2024-09-15 19:27:13,799 INFO L226 Difference]: Without dead ends: 53 [2024-09-15 19:27:13,799 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:13,800 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 5 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:13,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 132 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:13,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-15 19:27:13,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-15 19:27:13,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 30 states have internal predecessors, (34), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-15 19:27:13,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 66 transitions. [2024-09-15 19:27:13,808 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 66 transitions. Word has length 37 [2024-09-15 19:27:13,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:13,809 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 66 transitions. [2024-09-15 19:27:13,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.8) internal successors, (14), 4 states have internal predecessors, (14), 2 states have call successors, (8), 2 states have call predecessors, (8), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-15 19:27:13,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:13,809 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 66 transitions. [2024-09-15 19:27:13,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-15 19:27:13,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:13,812 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:13,825 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 19:27:14,016 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:14,017 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:14,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:14,017 INFO L85 PathProgramCache]: Analyzing trace with hash -1357220557, now seen corresponding path program 1 times [2024-09-15 19:27:14,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:14,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64587331] [2024-09-15 19:27:14,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:14,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:14,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:14,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1158557600] [2024-09-15 19:27:14,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:14,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:14,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:14,031 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:14,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 19:27:14,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:14,065 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-15 19:27:14,070 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 19:27:14,139 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-15 19:27:14,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64587331] [2024-09-15 19:27:14,333 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:14,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158557600] [2024-09-15 19:27:14,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158557600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:14,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:14,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2024-09-15 19:27:14,334 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271228816] [2024-09-15 19:27:14,336 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:14,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-15 19:27:14,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:14,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-15 19:27:14,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-09-15 19:27:14,338 INFO L87 Difference]: Start difference. First operand 53 states and 66 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:27:14,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:14,426 INFO L93 Difference]: Finished difference Result 68 states and 86 transitions. [2024-09-15 19:27:14,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-15 19:27:14,427 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) Word has length 44 [2024-09-15 19:27:14,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:14,430 INFO L225 Difference]: With dead ends: 68 [2024-09-15 19:27:14,431 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:27:14,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-09-15 19:27:14,435 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 11 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 93 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:14,437 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 147 Invalid, 93 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:14,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:27:14,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 63. [2024-09-15 19:27:14,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.2) internal successors, (42), 37 states have internal predecessors, (42), 20 states have call successors, (20), 8 states have call predecessors, (20), 7 states have return successors, (18), 17 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:27:14,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 80 transitions. [2024-09-15 19:27:14,455 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 80 transitions. Word has length 44 [2024-09-15 19:27:14,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:14,458 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 80 transitions. [2024-09-15 19:27:14,458 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 3 states have call successors, (11), 3 states have call predecessors, (11), 2 states have return successors, (8), 2 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-15 19:27:14,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:14,459 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 80 transitions. [2024-09-15 19:27:14,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-15 19:27:14,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:14,460 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:14,473 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 19:27:14,660 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 [2024-09-15 19:27:14,661 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:14,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:14,661 INFO L85 PathProgramCache]: Analyzing trace with hash 1728018148, now seen corresponding path program 1 times [2024-09-15 19:27:14,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:14,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351027174] [2024-09-15 19:27:14,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:14,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:14,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702226608] [2024-09-15 19:27:14,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:14,677 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:14,678 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:14,679 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:14,680 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 19:27:14,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:14,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 19:27:14,724 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:14,804 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-15 19:27:14,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:14,872 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-15 19:27:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351027174] [2024-09-15 19:27:14,873 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:14,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702226608] [2024-09-15 19:27:14,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702226608] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:14,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:27:14,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-15 19:27:14,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734588611] [2024-09-15 19:27:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:14,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:14,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:14,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 19:27:14,874 INFO L87 Difference]: Start difference. First operand 63 states and 80 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:27:14,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:14,923 INFO L93 Difference]: Finished difference Result 73 states and 92 transitions. [2024-09-15 19:27:14,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:14,923 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) Word has length 54 [2024-09-15 19:27:14,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:14,924 INFO L225 Difference]: With dead ends: 73 [2024-09-15 19:27:14,924 INFO L226 Difference]: Without dead ends: 71 [2024-09-15 19:27:14,925 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 19:27:14,925 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 5 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:14,925 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 125 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:14,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-15 19:27:14,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2024-09-15 19:27:14,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 39 states have (on average 1.1794871794871795) internal successors, (46), 42 states have internal predecessors, (46), 22 states have call successors, (22), 9 states have call predecessors, (22), 8 states have return successors, (20), 18 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-15 19:27:14,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 88 transitions. [2024-09-15 19:27:14,937 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 88 transitions. Word has length 54 [2024-09-15 19:27:14,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:14,937 INFO L474 AbstractCegarLoop]: Abstraction has 70 states and 88 transitions. [2024-09-15 19:27:14,938 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (9), 2 states have call predecessors, (9), 1 states have return successors, (7), 2 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-15 19:27:14,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:14,938 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 88 transitions. [2024-09-15 19:27:14,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-15 19:27:14,939 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:14,939 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:14,954 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-15 19:27:15,139 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 [2024-09-15 19:27:15,140 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:15,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:15,140 INFO L85 PathProgramCache]: Analyzing trace with hash 515743006, now seen corresponding path program 1 times [2024-09-15 19:27:15,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:15,141 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799849272] [2024-09-15 19:27:15,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:15,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:15,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:15,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:15,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,231 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:15,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:15,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:15,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:15,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:15,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 51 [2024-09-15 19:27:15,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,253 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 19:27:15,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:15,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799849272] [2024-09-15 19:27:15,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799849272] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:15,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 19:27:15,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-15 19:27:15,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071433901] [2024-09-15 19:27:15,254 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:15,254 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:15,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:15,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:15,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:15,255 INFO L87 Difference]: Start difference. First operand 70 states and 88 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:27:15,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:15,308 INFO L93 Difference]: Finished difference Result 78 states and 96 transitions. [2024-09-15 19:27:15,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:15,308 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 60 [2024-09-15 19:27:15,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:15,309 INFO L225 Difference]: With dead ends: 78 [2024-09-15 19:27:15,309 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 19:27:15,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:15,310 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:15,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 142 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:15,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 19:27:15,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-15 19:27:15,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 37 states have (on average 1.162162162162162) internal successors, (43), 40 states have internal predecessors, (43), 20 states have call successors, (20), 9 states have call predecessors, (20), 8 states have return successors, (18), 16 states have call predecessors, (18), 18 states have call successors, (18) [2024-09-15 19:27:15,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 81 transitions. [2024-09-15 19:27:15,326 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 81 transitions. Word has length 60 [2024-09-15 19:27:15,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:15,327 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 81 transitions. [2024-09-15 19:27:15,327 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (12), 2 states have call predecessors, (12), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-15 19:27:15,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:15,327 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 81 transitions. [2024-09-15 19:27:15,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2024-09-15 19:27:15,330 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:15,331 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:15,331 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-15 19:27:15,331 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:15,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:15,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1452252536, now seen corresponding path program 1 times [2024-09-15 19:27:15,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:15,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226589662] [2024-09-15 19:27:15,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:15,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:15,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:15,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [195054805] [2024-09-15 19:27:15,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:15,361 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:15,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:15,363 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:15,364 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 19:27:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:15,411 INFO L262 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-15 19:27:15,413 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 19 proven. 10 refuted. 0 times theorem prover too weak. 118 trivial. 0 not checked. [2024-09-15 19:27:15,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 16 proven. 7 refuted. 0 times theorem prover too weak. 124 trivial. 0 not checked. [2024-09-15 19:27:17,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226589662] [2024-09-15 19:27:17,341 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:17,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195054805] [2024-09-15 19:27:17,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [195054805] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:17,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:17,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-15 19:27:17,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446329249] [2024-09-15 19:27:17,342 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:17,342 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:27:17,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:17,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:27:17,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:27:17,345 INFO L87 Difference]: Start difference. First operand 66 states and 81 transitions. Second operand has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-15 19:27:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:18,357 INFO L93 Difference]: Finished difference Result 152 states and 208 transitions. [2024-09-15 19:27:18,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-15 19:27:18,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) Word has length 74 [2024-09-15 19:27:18,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:18,360 INFO L225 Difference]: With dead ends: 152 [2024-09-15 19:27:18,360 INFO L226 Difference]: Without dead ends: 129 [2024-09-15 19:27:18,360 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 129 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=164, Invalid=592, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:27:18,361 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 73 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 348 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 308 SdHoareTripleChecker+Invalid, 441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:18,361 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 308 Invalid, 441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 348 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 19:27:18,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-09-15 19:27:18,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 105. [2024-09-15 19:27:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 61 states have (on average 1.180327868852459) internal successors, (72), 65 states have internal predecessors, (72), 31 states have call successors, (31), 13 states have call predecessors, (31), 12 states have return successors, (29), 26 states have call predecessors, (29), 29 states have call successors, (29) [2024-09-15 19:27:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 132 transitions. [2024-09-15 19:27:18,387 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 132 transitions. Word has length 74 [2024-09-15 19:27:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:18,388 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 132 transitions. [2024-09-15 19:27:18,388 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.8) internal successors, (36), 17 states have internal predecessors, (36), 10 states have call successors, (25), 3 states have call predecessors, (25), 2 states have return successors, (23), 9 states have call predecessors, (23), 8 states have call successors, (23) [2024-09-15 19:27:18,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:18,388 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 132 transitions. [2024-09-15 19:27:18,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-15 19:27:18,389 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:18,389 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:18,405 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 19:27:18,593 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:18,594 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:18,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:18,594 INFO L85 PathProgramCache]: Analyzing trace with hash -1571705391, now seen corresponding path program 1 times [2024-09-15 19:27:18,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:18,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962862243] [2024-09-15 19:27:18,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:18,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:18,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:18,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1570959335] [2024-09-15 19:27:18,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:18,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:18,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:18,615 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:18,617 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 19:27:18,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:18,659 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-15 19:27:18,661 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 26 proven. 9 refuted. 0 times theorem prover too weak. 186 trivial. 0 not checked. [2024-09-15 19:27:19,031 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:19,482 INFO L134 CoverageAnalysis]: Checked inductivity of 221 backedges. 20 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:19,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962862243] [2024-09-15 19:27:19,483 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:19,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570959335] [2024-09-15 19:27:19,483 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570959335] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:19,483 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:19,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 9] total 20 [2024-09-15 19:27:19,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781360673] [2024-09-15 19:27:19,484 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:19,484 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 19:27:19,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:19,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 19:27:19,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2024-09-15 19:27:19,486 INFO L87 Difference]: Start difference. First operand 105 states and 132 transitions. Second operand has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-15 19:27:19,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:19,894 INFO L93 Difference]: Finished difference Result 145 states and 180 transitions. [2024-09-15 19:27:19,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:27:19,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) Word has length 85 [2024-09-15 19:27:19,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:19,896 INFO L225 Difference]: With dead ends: 145 [2024-09-15 19:27:19,897 INFO L226 Difference]: Without dead ends: 111 [2024-09-15 19:27:19,897 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 151 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2024-09-15 19:27:19,900 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 26 mSDsluCounter, 312 mSDsCounter, 0 mSdLazyCounter, 287 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 322 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 287 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:19,900 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 350 Invalid, 322 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 287 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:27:19,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2024-09-15 19:27:19,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 97. [2024-09-15 19:27:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 57 states have (on average 1.1578947368421053) internal successors, (66), 59 states have internal predecessors, (66), 27 states have call successors, (27), 13 states have call predecessors, (27), 12 states have return successors, (25), 24 states have call predecessors, (25), 25 states have call successors, (25) [2024-09-15 19:27:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 118 transitions. [2024-09-15 19:27:19,928 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 118 transitions. Word has length 85 [2024-09-15 19:27:19,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:19,929 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 118 transitions. [2024-09-15 19:27:19,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.9473684210526316) internal successors, (37), 17 states have internal predecessors, (37), 11 states have call successors, (27), 3 states have call predecessors, (27), 2 states have return successors, (25), 10 states have call predecessors, (25), 9 states have call successors, (25) [2024-09-15 19:27:19,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 118 transitions. [2024-09-15 19:27:19,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-15 19:27:19,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:19,930 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:19,951 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 19:27:20,134 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:20,135 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:20,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:20,135 INFO L85 PathProgramCache]: Analyzing trace with hash 1973508941, now seen corresponding path program 2 times [2024-09-15 19:27:20,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:20,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753610757] [2024-09-15 19:27:20,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:20,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:20,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:20,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,268 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:20,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:20,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:20,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,274 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:20,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:20,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,280 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:20,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:20,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,286 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:20,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:20,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:20,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:20,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:27:20,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,305 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:27:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,308 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:20,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753610757] [2024-09-15 19:27:20,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753610757] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:20,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983942484] [2024-09-15 19:27:20,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 19:27:20,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:20,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:20,311 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:20,311 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 19:27:20,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 19:27:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:27:20,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 19:27:20,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:20,378 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:20,444 INFO L134 CoverageAnalysis]: Checked inductivity of 226 backedges. 25 proven. 9 refuted. 0 times theorem prover too weak. 192 trivial. 0 not checked. [2024-09-15 19:27:20,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983942484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:20,444 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:20,444 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 5 [2024-09-15 19:27:20,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340548126] [2024-09-15 19:27:20,445 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:20,445 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:20,445 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:20,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:20,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:20,446 INFO L87 Difference]: Start difference. First operand 97 states and 118 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-15 19:27:20,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:20,497 INFO L93 Difference]: Finished difference Result 124 states and 155 transitions. [2024-09-15 19:27:20,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 19:27:20,497 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) Word has length 87 [2024-09-15 19:27:20,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:20,498 INFO L225 Difference]: With dead ends: 124 [2024-09-15 19:27:20,498 INFO L226 Difference]: Without dead ends: 102 [2024-09-15 19:27:20,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 203 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-15 19:27:20,499 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 0 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:20,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 156 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 19:27:20,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2024-09-15 19:27:20,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2024-09-15 19:27:20,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 60 states have (on average 1.15) internal successors, (69), 62 states have internal predecessors, (69), 29 states have call successors, (29), 13 states have call predecessors, (29), 12 states have return successors, (27), 26 states have call predecessors, (27), 27 states have call successors, (27) [2024-09-15 19:27:20,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 125 transitions. [2024-09-15 19:27:20,530 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 125 transitions. Word has length 87 [2024-09-15 19:27:20,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:20,530 INFO L474 AbstractCegarLoop]: Abstraction has 102 states and 125 transitions. [2024-09-15 19:27:20,530 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 5 states have internal predecessors, (29), 5 states have call successors, (21), 2 states have call predecessors, (21), 1 states have return successors, (19), 4 states have call predecessors, (19), 4 states have call successors, (19) [2024-09-15 19:27:20,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:20,531 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 125 transitions. [2024-09-15 19:27:20,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2024-09-15 19:27:20,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:20,531 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:20,547 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-15 19:27:20,732 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-15 19:27:20,733 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:20,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:20,734 INFO L85 PathProgramCache]: Analyzing trace with hash -637517709, now seen corresponding path program 1 times [2024-09-15 19:27:20,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:20,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076984315] [2024-09-15 19:27:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:20,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:20,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,919 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:20,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:20,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:20,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:20,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:20,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:20,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,941 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:20,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:20,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-15 19:27:20,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-15 19:27:20,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 81 [2024-09-15 19:27:20,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:20,955 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-15 19:27:20,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:20,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076984315] [2024-09-15 19:27:20,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076984315] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:20,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210445529] [2024-09-15 19:27:20,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:20,956 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:20,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:20,957 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:20,958 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 19:27:20,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:21,000 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-09-15 19:27:21,008 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:21,229 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 28 proven. 9 refuted. 0 times theorem prover too weak. 226 trivial. 0 not checked. [2024-09-15 19:27:21,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:21,490 INFO L134 CoverageAnalysis]: Checked inductivity of 263 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-15 19:27:21,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210445529] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:21,490 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:21,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11, 8] total 18 [2024-09-15 19:27:21,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976967083] [2024-09-15 19:27:21,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:21,491 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 19:27:21,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:21,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 19:27:21,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2024-09-15 19:27:21,492 INFO L87 Difference]: Start difference. First operand 102 states and 125 transitions. Second operand has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-15 19:27:21,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:21,776 INFO L93 Difference]: Finished difference Result 117 states and 145 transitions. [2024-09-15 19:27:21,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:27:21,777 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) Word has length 90 [2024-09-15 19:27:21,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:21,778 INFO L225 Difference]: With dead ends: 117 [2024-09-15 19:27:21,778 INFO L226 Difference]: Without dead ends: 100 [2024-09-15 19:27:21,780 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 200 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2024-09-15 19:27:21,780 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 22 mSDsluCounter, 344 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:21,780 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 389 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:27:21,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-15 19:27:21,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 93. [2024-09-15 19:27:21,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 57 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 22 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-15 19:27:21,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 111 transitions. [2024-09-15 19:27:21,809 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 111 transitions. Word has length 90 [2024-09-15 19:27:21,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:21,809 INFO L474 AbstractCegarLoop]: Abstraction has 93 states and 111 transitions. [2024-09-15 19:27:21,809 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.388888888888889) internal successors, (43), 15 states have internal predecessors, (43), 10 states have call successors, (35), 3 states have call predecessors, (35), 2 states have return successors, (33), 11 states have call predecessors, (33), 10 states have call successors, (33) [2024-09-15 19:27:21,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:21,810 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 111 transitions. [2024-09-15 19:27:21,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2024-09-15 19:27:21,810 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:21,811 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 12, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:21,827 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-15 19:27:22,011 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:22,011 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:22,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:22,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1204328542, now seen corresponding path program 1 times [2024-09-15 19:27:22,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:22,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310167939] [2024-09-15 19:27:22,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:22,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:22,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:22,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:22,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:22,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:22,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:22,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:22,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,080 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:22,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:22,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:22,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:22,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:22,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:27:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:27:22,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,098 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:27:22,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 85 [2024-09-15 19:27:22,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 29 proven. 10 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-15 19:27:22,103 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310167939] [2024-09-15 19:27:22,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310167939] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:22,103 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962168061] [2024-09-15 19:27:22,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:22,103 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:22,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:22,105 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:22,105 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 19:27:22,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,144 INFO L262 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 19:27:22,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 315 backedges. 81 proven. 0 refuted. 0 times theorem prover too weak. 234 trivial. 0 not checked. [2024-09-15 19:27:22,171 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-15 19:27:22,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962168061] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 19:27:22,171 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:27:22,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 6 [2024-09-15 19:27:22,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123501038] [2024-09-15 19:27:22,171 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 19:27:22,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 19:27:22,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:22,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 19:27:22,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:22,172 INFO L87 Difference]: Start difference. First operand 93 states and 111 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-15 19:27:22,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:22,251 INFO L93 Difference]: Finished difference Result 100 states and 117 transitions. [2024-09-15 19:27:22,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 19:27:22,252 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) Word has length 94 [2024-09-15 19:27:22,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:22,253 INFO L225 Difference]: With dead ends: 100 [2024-09-15 19:27:22,253 INFO L226 Difference]: Without dead ends: 88 [2024-09-15 19:27:22,253 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-15 19:27:22,254 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 5 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:22,254 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 120 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 19:27:22,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2024-09-15 19:27:22,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2024-09-15 19:27:22,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 53 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-15 19:27:22,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 104 transitions. [2024-09-15 19:27:22,282 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 104 transitions. Word has length 94 [2024-09-15 19:27:22,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:22,282 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 104 transitions. [2024-09-15 19:27:22,282 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 5 states have call successors, (18), 2 states have call predecessors, (18), 2 states have return successors, (16), 5 states have call predecessors, (16), 5 states have call successors, (16) [2024-09-15 19:27:22,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:22,283 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 104 transitions. [2024-09-15 19:27:22,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-15 19:27:22,283 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:22,284 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:22,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 19:27:22,484 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:22,485 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:22,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:22,485 INFO L85 PathProgramCache]: Analyzing trace with hash -588826413, now seen corresponding path program 3 times [2024-09-15 19:27:22,485 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:22,485 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099008452] [2024-09-15 19:27:22,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:22,485 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:22,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:22,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:22,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:22,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:22,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:22,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:22,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:22,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:22,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:22,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:22,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:22,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:22,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:27:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:27:22,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:27:22,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:27:22,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:27:22,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:22,993 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 30 proven. 26 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-15 19:27:22,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099008452] [2024-09-15 19:27:22,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099008452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:22,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1188942091] [2024-09-15 19:27:22,994 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 19:27:22,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:22,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:22,995 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:22,996 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 19:27:23,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 19:27:23,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 19:27:23,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 19:27:23,066 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:23,406 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-15 19:27:23,406 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 33 proven. 23 refuted. 0 times theorem prover too weak. 318 trivial. 0 not checked. [2024-09-15 19:27:23,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1188942091] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:23,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:23,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 25 [2024-09-15 19:27:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451340819] [2024-09-15 19:27:23,983 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:23,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 19:27:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:23,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 19:27:23,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:27:23,985 INFO L87 Difference]: Start difference. First operand 88 states and 104 transitions. Second operand has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) [2024-09-15 19:27:24,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:24,439 INFO L93 Difference]: Finished difference Result 153 states and 189 transitions. [2024-09-15 19:27:24,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-15 19:27:24,440 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) Word has length 104 [2024-09-15 19:27:24,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:24,442 INFO L225 Difference]: With dead ends: 153 [2024-09-15 19:27:24,442 INFO L226 Difference]: Without dead ends: 101 [2024-09-15 19:27:24,443 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 230 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2024-09-15 19:27:24,444 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 50 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:24,445 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 502 Invalid, 352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:27:24,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2024-09-15 19:27:24,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 89. [2024-09-15 19:27:24,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 53 states have (on average 1.0943396226415094) internal successors, (58), 54 states have internal predecessors, (58), 24 states have call successors, (24), 12 states have call predecessors, (24), 11 states have return successors, (22), 22 states have call predecessors, (22), 22 states have call successors, (22) [2024-09-15 19:27:24,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 104 transitions. [2024-09-15 19:27:24,468 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 104 transitions. Word has length 104 [2024-09-15 19:27:24,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:24,469 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 104 transitions. [2024-09-15 19:27:24,469 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.28) internal successors, (57), 23 states have internal predecessors, (57), 16 states have call successors, (45), 2 states have call predecessors, (45), 2 states have return successors, (45), 17 states have call predecessors, (45), 15 states have call successors, (45) [2024-09-15 19:27:24,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:24,469 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 104 transitions. [2024-09-15 19:27:24,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-15 19:27:24,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:24,470 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 14, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:24,476 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 19:27:24,674 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 19:27:24,675 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:24,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:24,675 INFO L85 PathProgramCache]: Analyzing trace with hash 1394769075, now seen corresponding path program 1 times [2024-09-15 19:27:24,675 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:24,675 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714323768] [2024-09-15 19:27:24,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:24,675 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:24,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:24,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [17150067] [2024-09-15 19:27:24,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:24,696 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:24,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:24,697 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:24,698 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 19:27:24,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:24,744 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 19:27:24,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:25,191 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-15 19:27:25,191 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:26,844 INFO L134 CoverageAnalysis]: Checked inductivity of 430 backedges. 27 proven. 72 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2024-09-15 19:27:26,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714323768] [2024-09-15 19:27:26,844 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:26,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17150067] [2024-09-15 19:27:26,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17150067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:26,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-15 19:27:26,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 29 [2024-09-15 19:27:26,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072688473] [2024-09-15 19:27:26,845 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:26,845 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 19:27:26,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:26,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 19:27:26,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2024-09-15 19:27:26,846 INFO L87 Difference]: Start difference. First operand 89 states and 104 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-15 19:27:27,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:27,474 INFO L93 Difference]: Finished difference Result 117 states and 132 transitions. [2024-09-15 19:27:27,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 19:27:27,475 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) Word has length 109 [2024-09-15 19:27:27,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:27,476 INFO L225 Difference]: With dead ends: 117 [2024-09-15 19:27:27,476 INFO L226 Difference]: Without dead ends: 95 [2024-09-15 19:27:27,476 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 189 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1187, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 19:27:27,477 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 28 mSDsluCounter, 438 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 473 SdHoareTripleChecker+Invalid, 530 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:27,477 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 473 Invalid, 530 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:27:27,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-15 19:27:27,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2024-09-15 19:27:27,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 59 states have internal predecessors, (59), 22 states have call successors, (22), 15 states have call predecessors, (22), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-15 19:27:27,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 101 transitions. [2024-09-15 19:27:27,495 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 101 transitions. Word has length 109 [2024-09-15 19:27:27,495 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:27,495 INFO L474 AbstractCegarLoop]: Abstraction has 95 states and 101 transitions. [2024-09-15 19:27:27,495 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 26 states have internal predecessors, (53), 16 states have call successors, (37), 3 states have call predecessors, (37), 3 states have return successors, (35), 14 states have call predecessors, (35), 16 states have call successors, (35) [2024-09-15 19:27:27,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:27,495 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 101 transitions. [2024-09-15 19:27:27,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-15 19:27:27,496 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:27,496 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:27,508 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 19:27:27,700 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 19:27:27,701 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:27,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:27,701 INFO L85 PathProgramCache]: Analyzing trace with hash 733497000, now seen corresponding path program 1 times [2024-09-15 19:27:27,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:27,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779656639] [2024-09-15 19:27:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:27,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:27,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-15 19:27:27,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [90224690] [2024-09-15 19:27:27,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:27,724 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:27,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:27,726 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:27,727 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 19:27:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:27,787 INFO L262 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-15 19:27:27,789 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:28,564 INFO L134 CoverageAnalysis]: Checked inductivity of 490 backedges. 64 proven. 72 refuted. 0 times theorem prover too weak. 354 trivial. 0 not checked. [2024-09-15 19:27:28,564 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:29,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779656639] [2024-09-15 19:27:29,543 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-15 19:27:29,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90224690] [2024-09-15 19:27:29,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90224690] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:29,544 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-15 19:27:29,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16] total 16 [2024-09-15 19:27:29,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637594140] [2024-09-15 19:27:29,544 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:29,545 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-15 19:27:29,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:29,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-15 19:27:29,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=475, Unknown=0, NotChecked=0, Total=600 [2024-09-15 19:27:29,546 INFO L87 Difference]: Start difference. First operand 95 states and 101 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-15 19:27:29,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:29,908 INFO L93 Difference]: Finished difference Result 101 states and 106 transitions. [2024-09-15 19:27:29,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-15 19:27:29,908 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) Word has length 115 [2024-09-15 19:27:29,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:29,909 INFO L225 Difference]: With dead ends: 101 [2024-09-15 19:27:29,909 INFO L226 Difference]: Without dead ends: 97 [2024-09-15 19:27:29,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=146, Invalid=556, Unknown=0, NotChecked=0, Total=702 [2024-09-15 19:27:29,910 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 3 mSDsluCounter, 365 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:29,910 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 405 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 19:27:29,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2024-09-15 19:27:29,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2024-09-15 19:27:29,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 60 states have (on average 1.0) internal successors, (60), 60 states have internal predecessors, (60), 22 states have call successors, (22), 16 states have call predecessors, (22), 14 states have return successors, (20), 20 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-15 19:27:29,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 102 transitions. [2024-09-15 19:27:29,931 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 102 transitions. Word has length 115 [2024-09-15 19:27:29,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:29,931 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 102 transitions. [2024-09-15 19:27:29,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 14 states have internal predecessors, (30), 9 states have call successors, (21), 2 states have call predecessors, (21), 2 states have return successors, (19), 7 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-15 19:27:29,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:29,932 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 102 transitions. [2024-09-15 19:27:29,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2024-09-15 19:27:29,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 19:27:29,933 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:29,945 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 19:27:30,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 19:27:30,133 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 19:27:30,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:30,134 INFO L85 PathProgramCache]: Analyzing trace with hash 265983484, now seen corresponding path program 1 times [2024-09-15 19:27:30,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 19:27:30,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914365046] [2024-09-15 19:27:30,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:30,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 19:27:30,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,429 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 19:27:30,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-15 19:27:30,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-15 19:27:30,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-15 19:27:30,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-15 19:27:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,438 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-15 19:27:30,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,439 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-15 19:27:30,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-15 19:27:30,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-15 19:27:30,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-15 19:27:30,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-15 19:27:30,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-15 19:27:30,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-15 19:27:30,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-15 19:27:30,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-15 19:27:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,463 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-15 19:27:30,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-15 19:27:30,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-15 19:27:30,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-15 19:27:30,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 111 [2024-09-15 19:27:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,482 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 492 trivial. 0 not checked. [2024-09-15 19:27:30,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 19:27:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914365046] [2024-09-15 19:27:30,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914365046] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 19:27:30,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91773838] [2024-09-15 19:27:30,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 19:27:30,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 19:27:30,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 19:27:30,484 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 19:27:30,485 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 19:27:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 19:27:30,543 INFO L262 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-15 19:27:30,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 19:27:30,845 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-15 19:27:30,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 19:27:31,473 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 31 proven. 74 refuted. 0 times theorem prover too weak. 447 trivial. 0 not checked. [2024-09-15 19:27:31,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [91773838] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 19:27:31,473 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 19:27:31,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 12] total 26 [2024-09-15 19:27:31,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975513044] [2024-09-15 19:27:31,474 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 19:27:31,474 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 19:27:31,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 19:27:31,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 19:27:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=559, Unknown=0, NotChecked=0, Total=650 [2024-09-15 19:27:31,475 INFO L87 Difference]: Start difference. First operand 97 states and 102 transitions. Second operand has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-15 19:27:31,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 19:27:31,787 INFO L93 Difference]: Finished difference Result 97 states and 102 transitions. [2024-09-15 19:27:31,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-15 19:27:31,788 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) Word has length 120 [2024-09-15 19:27:31,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 19:27:31,788 INFO L225 Difference]: With dead ends: 97 [2024-09-15 19:27:31,788 INFO L226 Difference]: Without dead ends: 0 [2024-09-15 19:27:31,789 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=146, Invalid=846, Unknown=0, NotChecked=0, Total=992 [2024-09-15 19:27:31,789 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 13 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 282 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 19:27:31,790 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 354 Invalid, 282 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 19:27:31,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-15 19:27:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-15 19:27:31,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-15 19:27:31,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-15 19:27:31,790 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 120 [2024-09-15 19:27:31,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 19:27:31,791 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-15 19:27:31,791 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.3461538461538463) internal successors, (61), 23 states have internal predecessors, (61), 19 states have call successors, (52), 3 states have call predecessors, (52), 2 states have return successors, (49), 17 states have call predecessors, (49), 19 states have call successors, (49) [2024-09-15 19:27:31,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 19:27:31,791 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-15 19:27:31,791 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-15 19:27:31,793 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-15 19:27:31,810 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 19:27:31,997 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 19:27:32,000 INFO L408 BasicCegarLoop]: Path program histogram: [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 19:27:32,002 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-15 19:27:33,468 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-15 19:27:33,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 15.09 07:27:33 BoogieIcfgContainer [2024-09-15 19:27:33,490 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-15 19:27:33,490 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-15 19:27:33,490 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-15 19:27:33,490 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-15 19:27:33,491 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 07:27:12" (3/4) ... [2024-09-15 19:27:33,493 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-15 19:27:33,495 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure ULTIMATE.init [2024-09-15 19:27:33,496 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure assume_abort_if_not [2024-09-15 19:27:33,496 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure main [2024-09-15 19:27:33,496 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure __VERIFIER_assert [2024-09-15 19:27:33,500 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2024-09-15 19:27:33,500 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2024-09-15 19:27:33,500 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-15 19:27:33,500 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-15 19:27:33,562 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-15 19:27:33,562 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-15 19:27:33,562 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-15 19:27:33,562 INFO L158 Benchmark]: Toolchain (without parser) took 21433.83ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 70.5MB in the beginning and 154.9MB in the end (delta: -84.4MB). Peak memory consumption was 109.4MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,563 INFO L158 Benchmark]: CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:27:33,563 INFO L158 Benchmark]: CACSL2BoogieTranslator took 211.67ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 58.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,563 INFO L158 Benchmark]: Boogie Procedure Inliner took 15.56ms. Allocated memory is still 92.3MB. Free memory was 58.4MB in the beginning and 57.4MB in the end (delta: 942.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,563 INFO L158 Benchmark]: Boogie Preprocessor took 38.20ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 55.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-15 19:27:33,563 INFO L158 Benchmark]: RCFGBuilder took 300.12ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 69.1MB in the end (delta: -13.4MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,564 INFO L158 Benchmark]: TraceAbstraction took 20791.06ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 68.6MB in the beginning and 160.1MB in the end (delta: -91.5MB). Peak memory consumption was 169.2MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,564 INFO L158 Benchmark]: Witness Printer took 72.02ms. Allocated memory is still 283.1MB. Free memory was 160.1MB in the beginning and 154.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2024-09-15 19:27:33,565 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.15ms. Allocated memory is still 58.7MB. Free memory was 30.4MB in the beginning and 30.3MB in the end (delta: 73.4kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 211.67ms. Allocated memory is still 92.3MB. Free memory was 70.3MB in the beginning and 58.4MB in the end (delta: 11.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 15.56ms. Allocated memory is still 92.3MB. Free memory was 58.4MB in the beginning and 57.4MB in the end (delta: 942.1kB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 38.20ms. Allocated memory is still 92.3MB. Free memory was 57.4MB in the beginning and 55.6MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 300.12ms. Allocated memory is still 92.3MB. Free memory was 55.6MB in the beginning and 69.1MB in the end (delta: -13.4MB). Peak memory consumption was 16.7MB. Max. memory is 16.1GB. * TraceAbstraction took 20791.06ms. Allocated memory was 92.3MB in the beginning and 283.1MB in the end (delta: 190.8MB). Free memory was 68.6MB in the beginning and 160.1MB in the end (delta: -91.5MB). Peak memory consumption was 169.2MB. Max. memory is 16.1GB. * Witness Printer took 72.02ms. Allocated memory is still 283.1MB. Free memory was 160.1MB in the beginning and 154.9MB in the end (delta: 5.2MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 17]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 5 procedures, 36 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 19.3s, OverallIterations: 16, TraceHistogramMax: 17, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 4.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 313 SdHoareTripleChecker+Valid, 2.1s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 262 mSDsluCounter, 3912 SdHoareTripleChecker+Invalid, 1.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 3270 mSDsCounter, 326 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2541 IncrementalHoareTripleChecker+Invalid, 2867 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 326 mSolverCounterUnsat, 642 mSDtfsCounter, 2541 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2120 GetRequests, 1884 SyntacticMatches, 6 SemanticMatches, 230 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 4.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=105occurred in iteration=8, InterpolantAutomatonStates: 149, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 16 MinimizatonAttempts, 75 StatesRemovedByMinimization, 8 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 11.3s InterpolantComputationTime, 2172 NumberOfCodeBlocks, 2145 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2391 ConstructedInterpolants, 0 QuantifiedInterpolants, 15679 SizeOfPredicates, 30 NumberOfNonLiveVariables, 2175 ConjunctsInSsa, 277 ConjunctsInUnsatCore, 30 InterpolantComputations, 7 PerfectInterpolantSequences, 6714/7295 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 46]: Loop Invariant Derived loop invariant: ((((((((((((0 <= r) && (((__int128) r + 1) <= d)) && (((__int128) d + r) == A)) && (((__int128) r + ((long long) 2 * B)) == ((__int128) A + d))) && (q == 1)) && (A <= 2)) && (p == 1)) || ((((((B == 1) && (r == 0)) && (q == 2)) && (p == 2)) && (A == 2)) && (d == 2))) || (((((((A == r) && (d == ((long long) 2 * B))) && (((__int128) r + 1) <= d)) && (p == 2)) && (q == 0)) && (A <= 2)) && (B <= r))) || ((((((B == 1) && (r == 0)) && (q == 2)) && (A == 2)) && (d == 1)) && (p == 1))) || ((((d == B) && (A == r)) && (q == 0)) && (p == 1))) || (((((((0 <= (r + (((__int128) -1 * d) / 2))) && (((__int128) A + d) == ((__int128) ((long long) B * 4) + r))) && (q == 0)) && (p == 4)) && ((A + (d / 2)) == ((__int128) r + ((long long) 2 * B)))) && (1 <= d)) && (A <= 2))) - InvariantResult [Line: 36]: Loop Invariant Derived loop invariant: ((((((((d == B) && (A == r)) && (q == 0)) && (1 <= d)) && (A <= 2)) && (p == 1)) || (((((((A == r) && (d == ((long long) 2 * B))) && (p == 2)) && (q == 0)) && (1 <= d)) && (A <= 2)) && (B <= r))) || (((((((0 <= (r + (((__int128) -1 * d) / 2))) && (((__int128) A + d) == ((__int128) ((long long) B * 4) + r))) && (q == 0)) && (p == 4)) && ((A + (d / 2)) == ((__int128) r + ((long long) 2 * B)))) && (1 <= d)) && (A <= 2))) - ProcedureContractResult [Line: 11]: Procedure Contract for assume_abort_if_not Derived contract for procedure assume_abort_if_not. Ensures: (\old(cond) != 0) - ProcedureContractResult [Line: 14]: Procedure Contract for __VERIFIER_assert Derived contract for procedure __VERIFIER_assert. Requires: (\old(cond) != 0) Ensures: (\old(cond) != 0) RESULT: Ultimate proved your program to be correct! [2024-09-15 19:27:33,613 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE