./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/nla-digbench/hard2.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/nla-digbench/hard2.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 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-de32597-m [2024-09-18 15:53:38,285 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:53:38,338 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:53:38,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:53:38,345 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:53:38,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:53:38,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:53:38,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:53:38,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:53:38,366 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:53:38,366 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:53:38,367 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:53:38,367 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:53:38,367 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:53:38,367 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:53:38,368 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:53:38,368 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:53:38,368 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:53:38,369 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:53:38,369 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:53:38,369 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:53:38,372 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:53:38,372 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:53:38,372 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:53:38,372 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:53:38,373 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:53:38,373 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:53:38,373 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:53:38,373 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:53:38,373 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:53:38,373 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:53:38,374 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:53:38,374 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:53:38,376 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:53:38,376 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:53:38,376 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:53:38,376 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:53:38,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:53:38,377 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:53:38,377 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:53:38,377 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:53:38,378 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:53:38,378 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 966f2b433cfe84d90040e5149c3cdda56fb59546e621a76bee869282a92c61d4 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:53:38,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:53:38,591 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:53:38,593 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:53:38,594 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:53:38,595 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:53:38,596 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench/hard2.c [2024-09-18 15:53:39,816 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:53:39,958 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:53:39,959 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench/hard2.c [2024-09-18 15:53:39,971 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/aa8fca2d6/2beb768476db4162b7ea4500158cde68/FLAG58e5de169 [2024-09-18 15:53:39,984 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/aa8fca2d6/2beb768476db4162b7ea4500158cde68 [2024-09-18 15:53:39,987 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:53:39,989 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:53:39,992 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:53:39,992 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:53:39,996 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:53:39,996 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:53:39" (1/1) ... [2024-09-18 15:53:39,997 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7fcd13b3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:39, skipping insertion in model container [2024-09-18 15:53:39,999 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:53:39" (1/1) ... [2024-09-18 15:53:40,019 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:53:40,144 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/hard2.c[526,539] [2024-09-18 15:53:40,159 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:53:40,171 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:53:40,180 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/hard2.c[526,539] [2024-09-18 15:53:40,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:53:40,213 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:53:40,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40 WrapperNode [2024-09-18 15:53:40,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:53:40,218 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:53:40,218 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:53:40,218 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:53:40,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,248 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,253 INFO L138 Inliner]: procedures = 14, calls = 22, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:53:40,254 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:53:40,254 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:53:40,254 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:53:40,255 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:53:40,262 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,262 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,263 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,273 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 10 initializations are split as follows [2, 8]. The 0 writes are split as follows [0, 0]. [2024-09-18 15:53:40,273 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,273 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,275 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,277 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,278 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,279 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,280 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:53:40,280 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:53:40,281 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:53:40,281 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:53:40,281 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (1/1) ... [2024-09-18 15:53:40,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:53:40,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:40,309 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) [2024-09-18 15:53:40,311 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 [2024-09-18 15:53:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:53:40,348 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:53:40,348 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:53:40,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:53:40,349 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-09-18 15:53:40,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:53:40,349 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:53:40,350 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:53:40,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:53:40,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:53:40,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:53:40,401 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:53:40,403 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:53:40,539 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 15:53:40,539 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:53:40,563 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:53:40,564 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:53:40,564 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:53:40 BoogieIcfgContainer [2024-09-18 15:53:40,564 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:53:40,566 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:53:40,566 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:53:40,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:53:40,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:53:39" (1/3) ... [2024-09-18 15:53:40,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:53:40, skipping insertion in model container [2024-09-18 15:53:40,570 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:53:40" (2/3) ... [2024-09-18 15:53:40,571 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@509990f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:53:40, skipping insertion in model container [2024-09-18 15:53:40,571 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:53:40" (3/3) ... [2024-09-18 15:53:40,572 INFO L112 eAbstractionObserver]: Analyzing ICFG hard2.c [2024-09-18 15:53:40,586 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:53:40,587 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:53:40,642 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:53:40,647 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;@54d8b1ee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:53:40,647 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:53:40,651 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) [2024-09-18 15:53:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:53:40,657 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:40,658 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:40,658 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:40,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:40,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1467428880, now seen corresponding path program 1 times [2024-09-18 15:53:40,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:40,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676735077] [2024-09-18 15:53:40,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:40,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:40,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:40,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:40,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:40,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:40,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676735077] [2024-09-18 15:53:40,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676735077] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:40,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:40,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:40,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297258360] [2024-09-18 15:53:40,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:40,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:40,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:40,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:40,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:40,957 INFO L87 Difference]: Start difference. First operand has 27 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 9 states have call successors, (9), 3 states have call predecessors, (9), 3 states have return successors, (9), 9 states have call predecessors, (9), 9 states have call successors, (9) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:53:41,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:41,077 INFO L93 Difference]: Finished difference Result 62 states and 107 transitions. [2024-09-18 15:53:41,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:41,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-18 15:53:41,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:41,087 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:53:41,087 INFO L226 Difference]: Without dead ends: 34 [2024-09-18 15:53:41,091 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:41,094 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:41,097 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 103 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:41,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-09-18 15:53:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 27. [2024-09-18 15:53:41,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 15 states have internal predecessors, (18), 9 states have call successors, (9), 4 states have call predecessors, (9), 3 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:53:41,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-09-18 15:53:41,133 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 10 [2024-09-18 15:53:41,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:41,133 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-09-18 15:53:41,133 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:53:41,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-09-18 15:53:41,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-18 15:53:41,134 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:41,134 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:41,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:53:41,135 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:41,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,135 INFO L85 PathProgramCache]: Analyzing trace with hash -740867385, now seen corresponding path program 1 times [2024-09-18 15:53:41,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:41,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039489720] [2024-09-18 15:53:41,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:41,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:41,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:41,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:41,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:41,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:53:41,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:41,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039489720] [2024-09-18 15:53:41,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039489720] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:41,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:41,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:41,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751986144] [2024-09-18 15:53:41,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:41,240 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:41,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:41,241 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:53:41,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:41,282 INFO L93 Difference]: Finished difference Result 40 states and 51 transitions. [2024-09-18 15:53:41,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:41,282 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 15 [2024-09-18 15:53:41,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:41,283 INFO L225 Difference]: With dead ends: 40 [2024-09-18 15:53:41,283 INFO L226 Difference]: Without dead ends: 38 [2024-09-18 15:53:41,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:41,284 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 9 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:41,285 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 88 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:41,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-18 15:53:41,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 31. [2024-09-18 15:53:41,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 18 states have internal predecessors, (21), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 7 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-18 15:53:41,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 37 transitions. [2024-09-18 15:53:41,291 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 37 transitions. Word has length 15 [2024-09-18 15:53:41,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:41,292 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 37 transitions. [2024-09-18 15:53:41,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (4), 2 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:53:41,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,292 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 37 transitions. [2024-09-18 15:53:41,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:53:41,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:41,293 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:41,293 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:53:41,293 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:41,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,294 INFO L85 PathProgramCache]: Analyzing trace with hash 51798576, now seen corresponding path program 1 times [2024-09-18 15:53:41,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:41,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134606086] [2024-09-18 15:53:41,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:41,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:41,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:41,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2122623640] [2024-09-18 15:53:41,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:41,305 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:41,305 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:41,307 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) [2024-09-18 15:53:41,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:53:41,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:41,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:53:41,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:41,437 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:53:41,437 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:53:41,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:41,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134606086] [2024-09-18 15:53:41,438 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:41,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122623640] [2024-09-18 15:53:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122623640] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:41,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:41,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:41,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796451200] [2024-09-18 15:53:41,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:41,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:41,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:41,440 INFO L87 Difference]: Start difference. First operand 31 states and 37 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:41,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:41,495 INFO L93 Difference]: Finished difference Result 57 states and 74 transitions. [2024-09-18 15:53:41,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:41,496 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 20 [2024-09-18 15:53:41,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:41,497 INFO L225 Difference]: With dead ends: 57 [2024-09-18 15:53:41,497 INFO L226 Difference]: Without dead ends: 44 [2024-09-18 15:53:41,497 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:41,499 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 5 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:41,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 90 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-18 15:53:41,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-18 15:53:41,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 24 states have (on average 1.2083333333333333) internal successors, (29), 25 states have internal predecessors, (29), 14 states have call successors, (14), 6 states have call predecessors, (14), 5 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-18 15:53:41,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2024-09-18 15:53:41,508 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 20 [2024-09-18 15:53:41,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:41,509 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2024-09-18 15:53:41,509 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 4 states have internal predecessors, (9), 2 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-18 15:53:41,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2024-09-18 15:53:41,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-18 15:53:41,510 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:41,510 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:41,522 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:41,712 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:41,712 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:41,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,713 INFO L85 PathProgramCache]: Analyzing trace with hash -2131897932, now seen corresponding path program 1 times [2024-09-18 15:53:41,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:41,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119723081] [2024-09-18 15:53:41,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:41,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:41,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:41,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1062007462] [2024-09-18 15:53:41,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:41,726 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:41,726 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:41,727 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) [2024-09-18 15:53:41,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:53:41,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:41,762 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:53:41,763 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-18 15:53:41,828 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-18 15:53:41,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:41,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119723081] [2024-09-18 15:53:41,828 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062007462] [2024-09-18 15:53:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062007462] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:41,829 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:41,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [313630176] [2024-09-18 15:53:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:41,830 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:41,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:41,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:41,831 INFO L87 Difference]: Start difference. First operand 44 states and 55 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:41,889 INFO L93 Difference]: Finished difference Result 57 states and 72 transitions. [2024-09-18 15:53:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:41,890 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), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 27 [2024-09-18 15:53:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:41,891 INFO L225 Difference]: With dead ends: 57 [2024-09-18 15:53:41,891 INFO L226 Difference]: Without dead ends: 55 [2024-09-18 15:53:41,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:41,892 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 7 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:41,892 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 72 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:41,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2024-09-18 15:53:41,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2024-09-18 15:53:41,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 30 states have (on average 1.2333333333333334) internal successors, (37), 32 states have internal predecessors, (37), 17 states have call successors, (17), 7 states have call predecessors, (17), 6 states have return successors, (15), 14 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:53:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 69 transitions. [2024-09-18 15:53:41,909 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 69 transitions. Word has length 27 [2024-09-18 15:53:41,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:41,909 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 69 transitions. [2024-09-18 15:53:41,910 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), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:41,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:41,911 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 69 transitions. [2024-09-18 15:53:41,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-18 15:53:41,912 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:41,912 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:41,924 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-18 15:53:42,112 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,113 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:42,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1419929093, now seen corresponding path program 1 times [2024-09-18 15:53:42,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:42,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572428538] [2024-09-18 15:53:42,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:42,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:42,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [843295770] [2024-09-18 15:53:42,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,134 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:42,139 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) [2024-09-18 15:53:42,150 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:53:42,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:53:42,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:42,301 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 4 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-18 15:53:42,301 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:42,393 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 10 proven. 0 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-18 15:53:42,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572428538] [2024-09-18 15:53:42,393 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:42,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843295770] [2024-09-18 15:53:42,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843295770] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:42,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:53:42,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2024-09-18 15:53:42,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037645929] [2024-09-18 15:53:42,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:42,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:42,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:42,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:42,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-18 15:53:42,395 INFO L87 Difference]: Start difference. First operand 54 states and 69 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:42,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:42,464 INFO L93 Difference]: Finished difference Result 64 states and 81 transitions. [2024-09-18 15:53:42,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:42,466 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-18 15:53:42,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:42,468 INFO L225 Difference]: With dead ends: 64 [2024-09-18 15:53:42,468 INFO L226 Difference]: Without dead ends: 62 [2024-09-18 15:53:42,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:53:42,469 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 5 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:42,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 83 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:42,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-18 15:53:42,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2024-09-18 15:53:42,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 34 states have (on average 1.2058823529411764) internal successors, (41), 37 states have internal predecessors, (41), 19 states have call successors, (19), 8 states have call predecessors, (19), 7 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2024-09-18 15:53:42,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 77 transitions. [2024-09-18 15:53:42,484 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 77 transitions. Word has length 37 [2024-09-18 15:53:42,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:42,485 INFO L474 AbstractCegarLoop]: Abstraction has 61 states and 77 transitions. [2024-09-18 15:53:42,485 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (6), 2 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-18 15:53:42,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,485 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 77 transitions. [2024-09-18 15:53:42,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-18 15:53:42,486 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:42,486 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:42,503 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:42,687 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,687 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:42,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1229363181, now seen corresponding path program 1 times [2024-09-18 15:53:42,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:42,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532287816] [2024-09-18 15:53:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:42,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,810 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,814 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 15:53:42,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:53:42,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,837 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:53:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:53:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2024-09-18 15:53:42,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:42,857 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-18 15:53:42,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:42,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532287816] [2024-09-18 15:53:42,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532287816] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:53:42,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:53:42,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-18 15:53:42,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109412520] [2024-09-18 15:53:42,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:53:42,860 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:53:42,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:42,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:53:42,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:53:42,860 INFO L87 Difference]: Start difference. First operand 61 states and 77 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-18 15:53:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:42,903 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-18 15:53:42,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-18 15:53:42,904 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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 43 [2024-09-18 15:53:42,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:42,905 INFO L225 Difference]: With dead ends: 69 [2024-09-18 15:53:42,906 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:53:42,906 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-18 15:53:42,907 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:42,907 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:53:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:53:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-18 15:53:42,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 32 states have (on average 1.1875) internal successors, (38), 35 states have internal predecessors, (38), 17 states have call successors, (17), 8 states have call predecessors, (17), 7 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-18 15:53:42,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2024-09-18 15:53:42,923 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 43 [2024-09-18 15:53:42,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:42,923 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2024-09-18 15:53:42,923 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 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) [2024-09-18 15:53:42,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,924 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2024-09-18 15:53:42,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-18 15:53:42,924 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:42,924 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 8, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:42,925 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-18 15:53:42,925 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:42,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:42,925 INFO L85 PathProgramCache]: Analyzing trace with hash -2039536139, now seen corresponding path program 1 times [2024-09-18 15:53:42,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:42,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005766523] [2024-09-18 15:53:42,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:42,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:42,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1737835309] [2024-09-18 15:53:42,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:42,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:42,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:42,962 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) [2024-09-18 15:53:42,963 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:53:43,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:43,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-18 15:53:43,013 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:43,244 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-18 15:53:43,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:44,285 INFO L134 CoverageAnalysis]: Checked inductivity of 135 backedges. 15 proven. 29 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-18 15:53:44,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:44,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005766523] [2024-09-18 15:53:44,286 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:44,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737835309] [2024-09-18 15:53:44,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737835309] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:44,286 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:44,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2024-09-18 15:53:44,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772760704] [2024-09-18 15:53:44,287 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:44,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-18 15:53:44,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:44,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-18 15:53:44,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-09-18 15:53:44,288 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-18 15:53:44,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:44,853 INFO L93 Difference]: Finished difference Result 132 states and 177 transitions. [2024-09-18 15:53:44,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-18 15:53:44,853 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) Word has length 57 [2024-09-18 15:53:44,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:44,854 INFO L225 Difference]: With dead ends: 132 [2024-09-18 15:53:44,855 INFO L226 Difference]: Without dead ends: 109 [2024-09-18 15:53:44,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:53:44,856 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 26 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:44,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 222 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:53:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-09-18 15:53:44,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2024-09-18 15:53:44,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 62 states have (on average 1.2258064516129032) internal successors, (76), 67 states have internal predecessors, (76), 33 states have call successors, (33), 12 states have call predecessors, (33), 11 states have return successors, (31), 27 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-18 15:53:44,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 140 transitions. [2024-09-18 15:53:44,886 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 140 transitions. Word has length 57 [2024-09-18 15:53:44,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:44,886 INFO L474 AbstractCegarLoop]: Abstraction has 107 states and 140 transitions. [2024-09-18 15:53:44,887 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 14 states have internal predecessors, (32), 8 states have call successors, (20), 3 states have call predecessors, (20), 2 states have return successors, (17), 5 states have call predecessors, (17), 6 states have call successors, (17) [2024-09-18 15:53:44,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:44,887 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 140 transitions. [2024-09-18 15:53:44,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2024-09-18 15:53:44,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:44,889 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 10, 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] [2024-09-18 15:53:44,904 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-18 15:53:45,092 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:45,093 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:45,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:45,093 INFO L85 PathProgramCache]: Analyzing trace with hash 620479267, now seen corresponding path program 1 times [2024-09-18 15:53:45,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:45,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919067861] [2024-09-18 15:53:45,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:45,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:45,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:45,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [617435085] [2024-09-18 15:53:45,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:45,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:45,143 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:45,144 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) [2024-09-18 15:53:45,145 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:53:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:45,189 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-18 15:53:45,193 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:45,393 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-18 15:53:45,395 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:45,857 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 19 proven. 37 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-18 15:53:45,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919067861] [2024-09-18 15:53:45,858 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:45,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617435085] [2024-09-18 15:53:45,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617435085] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:45,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:45,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2024-09-18 15:53:45,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075326085] [2024-09-18 15:53:45,859 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:45,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:53:45,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:45,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:53:45,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:53:45,863 INFO L87 Difference]: Start difference. First operand 107 states and 140 transitions. Second operand has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-18 15:53:46,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:46,343 INFO L93 Difference]: Finished difference Result 162 states and 215 transitions. [2024-09-18 15:53:46,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:53:46,344 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) Word has length 68 [2024-09-18 15:53:46,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:46,346 INFO L225 Difference]: With dead ends: 162 [2024-09-18 15:53:46,348 INFO L226 Difference]: Without dead ends: 130 [2024-09-18 15:53:46,348 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:53:46,349 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 13 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:46,349 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 199 Invalid, 300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:53:46,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2024-09-18 15:53:46,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 104. [2024-09-18 15:53:46,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 61 states have (on average 1.180327868852459) internal successors, (72), 66 states have internal predecessors, (72), 30 states have call successors, (30), 13 states have call predecessors, (30), 12 states have return successors, (28), 24 states have call predecessors, (28), 28 states have call successors, (28) [2024-09-18 15:53:46,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 130 transitions. [2024-09-18 15:53:46,374 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 130 transitions. Word has length 68 [2024-09-18 15:53:46,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:46,374 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 130 transitions. [2024-09-18 15:53:46,375 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.4285714285714284) internal successors, (34), 15 states have internal predecessors, (34), 9 states have call successors, (24), 3 states have call predecessors, (24), 2 states have return successors, (21), 6 states have call predecessors, (21), 7 states have call successors, (21) [2024-09-18 15:53:46,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:46,375 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 130 transitions. [2024-09-18 15:53:46,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-18 15:53:46,376 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:46,376 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 11, 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] [2024-09-18 15:53:46,391 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:53:46,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-18 15:53:46,584 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:46,585 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:46,585 INFO L85 PathProgramCache]: Analyzing trace with hash -768337324, now seen corresponding path program 1 times [2024-09-18 15:53:46,585 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:46,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [930071403] [2024-09-18 15:53:46,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:46,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:53:46,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,852 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:53:46,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 15:53:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:53:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:53:46,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:53:46,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:53:46,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:53:46,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:53:46,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-18 15:53:46,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2024-09-18 15:53:46,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2024-09-18 15:53:46,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,900 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:46,901 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [930071403] [2024-09-18 15:53:46,901 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [930071403] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:53:46,901 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242256749] [2024-09-18 15:53:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:46,901 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:46,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:46,902 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) [2024-09-18 15:53:46,904 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:53:46,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:53:46,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-18 15:53:46,946 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:47,070 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:47,070 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:47,354 INFO L134 CoverageAnalysis]: Checked inductivity of 251 backedges. 22 proven. 9 refuted. 0 times theorem prover too weak. 220 trivial. 0 not checked. [2024-09-18 15:53:47,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242256749] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:47,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:53:47,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 14 [2024-09-18 15:53:47,354 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731663757] [2024-09-18 15:53:47,354 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:47,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-18 15:53:47,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:47,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-18 15:53:47,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:53:47,356 INFO L87 Difference]: Start difference. First operand 104 states and 130 transitions. Second operand has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-18 15:53:47,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:53:47,541 INFO L93 Difference]: Finished difference Result 143 states and 168 transitions. [2024-09-18 15:53:47,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-18 15:53:47,541 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) Word has length 73 [2024-09-18 15:53:47,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:53:47,542 INFO L225 Difference]: With dead ends: 143 [2024-09-18 15:53:47,543 INFO L226 Difference]: Without dead ends: 94 [2024-09-18 15:53:47,543 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 163 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2024-09-18 15:53:47,545 INFO L434 NwaCegarLoop]: 33 mSDtfsCounter, 7 mSDsluCounter, 243 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:53:47,545 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 276 Invalid, 193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:53:47,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2024-09-18 15:53:47,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2024-09-18 15:53:47,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 56 states have (on average 1.125) internal successors, (63), 59 states have internal predecessors, (63), 25 states have call successors, (25), 13 states have call predecessors, (25), 12 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-18 15:53:47,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 111 transitions. [2024-09-18 15:53:47,569 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 111 transitions. Word has length 73 [2024-09-18 15:53:47,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:53:47,570 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 111 transitions. [2024-09-18 15:53:47,570 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.7857142857142856) internal successors, (39), 12 states have internal predecessors, (39), 9 states have call successors, (37), 3 states have call predecessors, (37), 1 states have return successors, (33), 9 states have call predecessors, (33), 9 states have call successors, (33) [2024-09-18 15:53:47,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:47,570 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 111 transitions. [2024-09-18 15:53:47,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-18 15:53:47,571 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:53:47,571 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 13, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:53:47,585 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:53:47,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:47,774 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:53:47,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:53:47,775 INFO L85 PathProgramCache]: Analyzing trace with hash 721076372, now seen corresponding path program 2 times [2024-09-18 15:53:47,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:53:47,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495106168] [2024-09-18 15:53:47,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:53:47,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:53:47,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:53:47,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1220548644] [2024-09-18 15:53:47,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:53:47,800 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:53:47,800 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:53:47,802 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) [2024-09-18 15:53:47,803 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:53:47,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:53:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:53:47,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 45 conjuncts are in the unsatisfiable core [2024-09-18 15:53:47,854 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:53:48,127 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-18 15:53:48,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:53:55,966 INFO L134 CoverageAnalysis]: Checked inductivity of 362 backedges. 28 proven. 58 refuted. 0 times theorem prover too weak. 276 trivial. 0 not checked. [2024-09-18 15:53:55,967 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:53:55,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495106168] [2024-09-18 15:53:55,967 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:53:55,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220548644] [2024-09-18 15:53:55,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220548644] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:53:55,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:53:55,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 21 [2024-09-18 15:53:55,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639774949] [2024-09-18 15:53:55,968 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:53:55,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-18 15:53:55,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:53:55,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-18 15:53:55,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2024-09-18 15:53:55,969 INFO L87 Difference]: Start difference. First operand 94 states and 111 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-18 15:54:05,829 WARN L293 SmtUtils]: Spent 9.62s on a formula simplification. DAG size of input: 168 DAG size of output: 83 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-18 15:54:08,630 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.65s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:09,725 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result VALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:11,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:11,235 INFO L93 Difference]: Finished difference Result 199 states and 262 transitions. [2024-09-18 15:54:11,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-18 15:54:11,235 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) Word has length 87 [2024-09-18 15:54:11,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:11,237 INFO L225 Difference]: With dead ends: 199 [2024-09-18 15:54:11,237 INFO L226 Difference]: Without dead ends: 166 [2024-09-18 15:54:11,237 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:54:11,238 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 60 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 443 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 557 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 443 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:11,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 314 Invalid, 557 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 443 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-18 15:54:11,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2024-09-18 15:54:11,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2024-09-18 15:54:11,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 95 states have (on average 1.1894736842105262) internal successors, (113), 103 states have internal predecessors, (113), 51 states have call successors, (51), 16 states have call predecessors, (51), 15 states have return successors, (49), 42 states have call predecessors, (49), 49 states have call successors, (49) [2024-09-18 15:54:11,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 213 transitions. [2024-09-18 15:54:11,296 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 213 transitions. Word has length 87 [2024-09-18 15:54:11,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:11,296 INFO L474 AbstractCegarLoop]: Abstraction has 162 states and 213 transitions. [2024-09-18 15:54:11,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 19 states have internal predecessors, (42), 12 states have call successors, (30), 3 states have call predecessors, (30), 2 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2024-09-18 15:54:11,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:11,297 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 213 transitions. [2024-09-18 15:54:11,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2024-09-18 15:54:11,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:11,298 INFO L216 NwaCegarLoop]: trace histogram [16, 15, 15, 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] [2024-09-18 15:54:11,310 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:54:11,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:11,498 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:11,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:11,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1885445924, now seen corresponding path program 2 times [2024-09-18 15:54:11,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:11,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887395923] [2024-09-18 15:54:11,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:11,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:11,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [466974811] [2024-09-18 15:54:11,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:11,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:11,531 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:11,532 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) [2024-09-18 15:54:11,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:54:11,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:11,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:11,590 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-18 15:54:11,594 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-18 15:54:11,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:13,933 INFO L134 CoverageAnalysis]: Checked inductivity of 478 backedges. 32 proven. 68 refuted. 0 times theorem prover too weak. 378 trivial. 0 not checked. [2024-09-18 15:54:13,933 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:13,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887395923] [2024-09-18 15:54:13,933 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:13,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466974811] [2024-09-18 15:54:13,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466974811] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:13,934 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:54:13,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2024-09-18 15:54:13,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848202835] [2024-09-18 15:54:13,934 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:13,935 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-18 15:54:13,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:13,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-18 15:54:13,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=545, Unknown=0, NotChecked=0, Total=702 [2024-09-18 15:54:13,936 INFO L87 Difference]: Start difference. First operand 162 states and 213 transitions. Second operand has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-18 15:54:20,180 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=true, quantifiers [] [2024-09-18 15:54:21,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:21,313 INFO L93 Difference]: Finished difference Result 235 states and 312 transitions. [2024-09-18 15:54:21,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:54:21,314 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) Word has length 98 [2024-09-18 15:54:21,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:21,316 INFO L225 Difference]: With dead ends: 235 [2024-09-18 15:54:21,316 INFO L226 Difference]: Without dead ends: 172 [2024-09-18 15:54:21,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=280, Invalid=842, Unknown=0, NotChecked=0, Total=1122 [2024-09-18 15:54:21,318 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 110 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:21,318 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 310 Invalid, 527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 416 Invalid, 1 Unknown, 0 Unchecked, 5.9s Time] [2024-09-18 15:54:21,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2024-09-18 15:54:21,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 145. [2024-09-18 15:54:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 86 states have (on average 1.1395348837209303) internal successors, (98), 93 states have internal predecessors, (98), 42 states have call successors, (42), 17 states have call predecessors, (42), 16 states have return successors, (40), 34 states have call predecessors, (40), 40 states have call successors, (40) [2024-09-18 15:54:21,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 180 transitions. [2024-09-18 15:54:21,372 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 180 transitions. Word has length 98 [2024-09-18 15:54:21,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:21,372 INFO L474 AbstractCegarLoop]: Abstraction has 145 states and 180 transitions. [2024-09-18 15:54:21,373 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 25 states have (on average 1.76) internal successors, (44), 25 states have internal predecessors, (44), 16 states have call successors, (34), 3 states have call predecessors, (34), 2 states have return successors, (31), 14 states have call predecessors, (31), 14 states have call successors, (31) [2024-09-18 15:54:21,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:21,373 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 180 transitions. [2024-09-18 15:54:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-18 15:54:21,375 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:21,375 INFO L216 NwaCegarLoop]: trace histogram [17, 16, 16, 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] [2024-09-18 15:54:21,387 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:21,579 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:21,579 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:21,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:21,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1238144755, now seen corresponding path program 2 times [2024-09-18 15:54:21,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:21,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055303637] [2024-09-18 15:54:21,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:21,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:21,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:21,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:54:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 15:54:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,879 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:54:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:54:21,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:54:21,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,886 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:54:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:54:21,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,890 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:54:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,892 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:54:21,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:54:21,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:54:21,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-18 15:54:21,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,904 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-18 15:54:21,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 83 [2024-09-18 15:54:21,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-18 15:54:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2024-09-18 15:54:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:21,919 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:21,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055303637] [2024-09-18 15:54:21,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055303637] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:21,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407425936] [2024-09-18 15:54:21,919 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:54:21,919 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:21,919 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:21,921 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) [2024-09-18 15:54:21,922 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:54:21,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:54:21,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:21,971 INFO L262 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-18 15:54:21,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:22,169 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:22,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 540 backedges. 32 proven. 28 refuted. 0 times theorem prover too weak. 480 trivial. 0 not checked. [2024-09-18 15:54:22,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407425936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:22,970 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:54:22,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 8] total 19 [2024-09-18 15:54:22,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807508428] [2024-09-18 15:54:22,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:22,971 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-18 15:54:22,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-18 15:54:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-18 15:54:22,972 INFO L87 Difference]: Start difference. First operand 145 states and 180 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-18 15:54:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:23,255 INFO L93 Difference]: Finished difference Result 170 states and 206 transitions. [2024-09-18 15:54:23,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-18 15:54:23,259 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) Word has length 103 [2024-09-18 15:54:23,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:23,260 INFO L225 Difference]: With dead ends: 170 [2024-09-18 15:54:23,260 INFO L226 Difference]: Without dead ends: 132 [2024-09-18 15:54:23,260 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 228 SyntacticMatches, 3 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=366, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:54:23,261 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 13 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 314 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:23,261 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 314 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:54:23,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-09-18 15:54:23,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 132. [2024-09-18 15:54:23,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 84 states have internal predecessors, (89), 36 states have call successors, (36), 17 states have call predecessors, (36), 16 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2024-09-18 15:54:23,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 158 transitions. [2024-09-18 15:54:23,308 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 158 transitions. Word has length 103 [2024-09-18 15:54:23,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:23,309 INFO L474 AbstractCegarLoop]: Abstraction has 132 states and 158 transitions. [2024-09-18 15:54:23,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 17 states have internal predecessors, (54), 14 states have call successors, (52), 3 states have call predecessors, (52), 1 states have return successors, (48), 14 states have call predecessors, (48), 14 states have call successors, (48) [2024-09-18 15:54:23,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:23,309 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 158 transitions. [2024-09-18 15:54:23,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-18 15:54:23,311 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:23,311 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:23,323 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:54:23,514 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:54:23,515 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:23,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:23,515 INFO L85 PathProgramCache]: Analyzing trace with hash -840147397, now seen corresponding path program 1 times [2024-09-18 15:54:23,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:23,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972127339] [2024-09-18 15:54:23,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:23,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,648 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:54:23,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-18 15:54:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2024-09-18 15:54:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-18 15:54:23,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,655 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-18 15:54:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-18 15:54:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2024-09-18 15:54:23,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,662 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2024-09-18 15:54:23,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,664 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 45 [2024-09-18 15:54:23,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2024-09-18 15:54:23,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 57 [2024-09-18 15:54:23,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2024-09-18 15:54:23,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,675 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 67 [2024-09-18 15:54:23,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2024-09-18 15:54:23,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 79 [2024-09-18 15:54:23,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 87 [2024-09-18 15:54:23,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2024-09-18 15:54:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2024-09-18 15:54:23,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,694 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 105 [2024-09-18 15:54:23,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,696 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 51 proven. 28 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:54:23,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:23,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972127339] [2024-09-18 15:54:23,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [972127339] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:23,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486612377] [2024-09-18 15:54:23,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:23,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:23,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:23,698 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) [2024-09-18 15:54:23,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:54:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:54:23,747 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:54:23,748 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:23,799 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:54:23,799 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:23,929 INFO L134 CoverageAnalysis]: Checked inductivity of 691 backedges. 66 proven. 13 refuted. 0 times theorem prover too weak. 612 trivial. 0 not checked. [2024-09-18 15:54:23,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486612377] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:23,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:54:23,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 9 [2024-09-18 15:54:23,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863807582] [2024-09-18 15:54:23,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:23,930 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:54:23,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:23,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:54:23,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:54:23,931 INFO L87 Difference]: Start difference. First operand 132 states and 158 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-18 15:54:24,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:24,038 INFO L93 Difference]: Finished difference Result 138 states and 163 transitions. [2024-09-18 15:54:24,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-18 15:54:24,038 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) Word has length 115 [2024-09-18 15:54:24,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:24,039 INFO L225 Difference]: With dead ends: 138 [2024-09-18 15:54:24,039 INFO L226 Difference]: Without dead ends: 131 [2024-09-18 15:54:24,040 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 262 SyntacticMatches, 6 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:54:24,040 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 8 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:24,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 189 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:54:24,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-18 15:54:24,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 127. [2024-09-18 15:54:24,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 77 states have (on average 1.1168831168831168) internal successors, (86), 81 states have internal predecessors, (86), 33 states have call successors, (33), 17 states have call predecessors, (33), 16 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-18 15:54:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 150 transitions. [2024-09-18 15:54:24,084 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 150 transitions. Word has length 115 [2024-09-18 15:54:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:24,085 INFO L474 AbstractCegarLoop]: Abstraction has 127 states and 150 transitions. [2024-09-18 15:54:24,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 9 states have internal predecessors, (34), 9 states have call successors, (28), 2 states have call predecessors, (28), 1 states have return successors, (26), 8 states have call predecessors, (26), 8 states have call successors, (26) [2024-09-18 15:54:24,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:24,085 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 150 transitions. [2024-09-18 15:54:24,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-18 15:54:24,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:24,086 INFO L216 NwaCegarLoop]: trace histogram [19, 18, 18, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:24,098 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:54:24,286 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:54:24,287 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:24,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1808323179, now seen corresponding path program 3 times [2024-09-18 15:54:24,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:24,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179504213] [2024-09-18 15:54:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:24,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:24,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:24,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [657552519] [2024-09-18 15:54:24,317 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:24,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:24,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:24,319 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) [2024-09-18 15:54:24,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:54:24,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:54:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:24,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-18 15:54:24,373 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 699 backedges. 142 proven. 2 refuted. 0 times theorem prover too weak. 555 trivial. 0 not checked. [2024-09-18 15:54:24,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:25,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:25,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179504213] [2024-09-18 15:54:25,363 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:25,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657552519] [2024-09-18 15:54:25,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657552519] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:54:25,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-18 15:54:25,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9] total 9 [2024-09-18 15:54:25,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137348789] [2024-09-18 15:54:25,364 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:25,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:54:25,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:25,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:54:25,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2024-09-18 15:54:25,365 INFO L87 Difference]: Start difference. First operand 127 states and 150 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 15:54:25,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:25,468 INFO L93 Difference]: Finished difference Result 133 states and 155 transitions. [2024-09-18 15:54:25,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:54:25,468 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) Word has length 117 [2024-09-18 15:54:25,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:25,469 INFO L225 Difference]: With dead ends: 133 [2024-09-18 15:54:25,469 INFO L226 Difference]: Without dead ends: 131 [2024-09-18 15:54:25,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-09-18 15:54:25,470 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 15 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:25,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 64 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:54:25,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2024-09-18 15:54:25,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 131. [2024-09-18 15:54:25,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 80 states have (on average 1.1125) internal successors, (89), 84 states have internal predecessors, (89), 33 states have call successors, (33), 18 states have call predecessors, (33), 17 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-18 15:54:25,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 153 transitions. [2024-09-18 15:54:25,521 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 153 transitions. Word has length 117 [2024-09-18 15:54:25,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:25,522 INFO L474 AbstractCegarLoop]: Abstraction has 131 states and 153 transitions. [2024-09-18 15:54:25,522 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 8 states have internal predecessors, (20), 3 states have call successors, (9), 2 states have call predecessors, (9), 2 states have return successors, (8), 4 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-18 15:54:25,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:25,522 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 153 transitions. [2024-09-18 15:54:25,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2024-09-18 15:54:25,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:54:25,524 INFO L216 NwaCegarLoop]: trace histogram [21, 20, 20, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:25,537 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-18 15:54:25,728 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:54:25,729 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:54:25,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:25,729 INFO L85 PathProgramCache]: Analyzing trace with hash -725567613, now seen corresponding path program 3 times [2024-09-18 15:54:25,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:54:25,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946498671] [2024-09-18 15:54:25,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:54:25,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:54:25,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-18 15:54:25,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1954901166] [2024-09-18 15:54:25,752 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:54:25,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:54:25,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:54:25,753 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) [2024-09-18 15:54:25,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-18 15:54:25,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-18 15:54:25,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:54:25,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 29 conjuncts are in the unsatisfiable core [2024-09-18 15:54:25,798 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:54:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 163 proven. 53 refuted. 0 times theorem prover too weak. 641 trivial. 0 not checked. [2024-09-18 15:54:25,917 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:54:26,043 INFO L134 CoverageAnalysis]: Checked inductivity of 857 backedges. 152 proven. 2 refuted. 0 times theorem prover too weak. 703 trivial. 0 not checked. [2024-09-18 15:54:26,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:54:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946498671] [2024-09-18 15:54:26,044 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-18 15:54:26,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1954901166] [2024-09-18 15:54:26,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1954901166] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:54:26,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-18 15:54:26,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 8] total 16 [2024-09-18 15:54:26,044 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739281519] [2024-09-18 15:54:26,045 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-18 15:54:26,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-18 15:54:26,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:54:26,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-18 15:54:26,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2024-09-18 15:54:26,046 INFO L87 Difference]: Start difference. First operand 131 states and 153 transitions. Second operand has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-18 15:54:26,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:54:26,228 INFO L93 Difference]: Finished difference Result 132 states and 154 transitions. [2024-09-18 15:54:26,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:54:26,228 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) Word has length 128 [2024-09-18 15:54:26,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:54:26,229 INFO L225 Difference]: With dead ends: 132 [2024-09-18 15:54:26,229 INFO L226 Difference]: Without dead ends: 0 [2024-09-18 15:54:26,229 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2024-09-18 15:54:26,230 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 51 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:54:26,230 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 120 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:54:26,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-18 15:54:26,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-18 15:54:26,230 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) [2024-09-18 15:54:26,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-18 15:54:26,230 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 128 [2024-09-18 15:54:26,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:54:26,231 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-18 15:54:26,231 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 11 states have internal predecessors, (32), 7 states have call successors, (19), 3 states have call predecessors, (19), 2 states have return successors, (19), 7 states have call predecessors, (19), 5 states have call successors, (19) [2024-09-18 15:54:26,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:54:26,231 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-18 15:54:26,231 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-18 15:54:26,234 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-18 15:54:26,250 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-18 15:54:26,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-18 15:54:26,438 INFO L408 BasicCegarLoop]: Path program histogram: [3, 3, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:54:26,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-18 15:54:28,923 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-18 15:54:28,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.09 03:54:28 BoogieIcfgContainer [2024-09-18 15:54:28,936 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-18 15:54:28,936 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-18 15:54:28,936 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-18 15:54:28,937 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-18 15:54:28,937 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:53:40" (3/4) ... [2024-09-18 15:54:28,941 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-18 15:54:28,993 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-18 15:54:28,993 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-18 15:54:28,994 INFO L158 Benchmark]: Toolchain (without parser) took 49005.03ms. Allocated memory was 157.3MB in the beginning and 362.8MB in the end (delta: 205.5MB). Free memory was 87.5MB in the beginning and 177.3MB in the end (delta: -89.9MB). Peak memory consumption was 117.0MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,994 INFO L158 Benchmark]: CDTParser took 0.16ms. Allocated memory is still 157.3MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-18 15:54:28,994 INFO L158 Benchmark]: CACSL2BoogieTranslator took 226.01ms. Allocated memory is still 157.3MB. Free memory was 87.2MB in the beginning and 75.6MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,994 INFO L158 Benchmark]: Boogie Procedure Inliner took 35.55ms. Allocated memory is still 157.3MB. Free memory was 75.6MB in the beginning and 128.9MB in the end (delta: -53.4MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,995 INFO L158 Benchmark]: Boogie Preprocessor took 25.66ms. Allocated memory is still 157.3MB. Free memory was 128.9MB in the beginning and 127.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,995 INFO L158 Benchmark]: RCFGBuilder took 284.13ms. Allocated memory is still 157.3MB. Free memory was 126.6MB in the beginning and 113.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,995 INFO L158 Benchmark]: TraceAbstraction took 48370.23ms. Allocated memory was 157.3MB in the beginning and 362.8MB in the end (delta: 205.5MB). Free memory was 113.1MB in the beginning and 179.4MB in the end (delta: -66.3MB). Peak memory consumption was 205.4MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,996 INFO L158 Benchmark]: Witness Printer took 56.74ms. Allocated memory is still 362.8MB. Free memory was 179.4MB in the beginning and 177.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-18 15:54:28,997 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.16ms. Allocated memory is still 157.3MB. Free memory is still 110.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 226.01ms. Allocated memory is still 157.3MB. Free memory was 87.2MB in the beginning and 75.6MB in the end (delta: 11.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 35.55ms. Allocated memory is still 157.3MB. Free memory was 75.6MB in the beginning and 128.9MB in the end (delta: -53.4MB). Peak memory consumption was 8.2MB. Max. memory is 16.1GB. * Boogie Preprocessor took 25.66ms. Allocated memory is still 157.3MB. Free memory was 128.9MB in the beginning and 127.2MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 284.13ms. Allocated memory is still 157.3MB. Free memory was 126.6MB in the beginning and 113.5MB in the end (delta: 13.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 48370.23ms. Allocated memory was 157.3MB in the beginning and 362.8MB in the end (delta: 205.5MB). Free memory was 113.1MB in the beginning and 179.4MB in the end (delta: -66.3MB). Peak memory consumption was 205.4MB. Max. memory is 16.1GB. * Witness Printer took 56.74ms. Allocated memory is still 362.8MB. Free memory was 179.4MB in the beginning and 177.3MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. 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 4 procedures, 27 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 45.8s, OverallIterations: 15, TraceHistogramMax: 21, PathProgramHistogramMax: 3, EmptinessCheckTime: 0.0s, AutomataDifference: 25.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 336 SdHoareTripleChecker+Valid, 11.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 286 mSDsluCounter, 2544 SdHoareTripleChecker+Invalid, 11.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2115 mSDsCounter, 447 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2308 IncrementalHoareTripleChecker+Invalid, 2756 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 447 mSolverCounterUnsat, 429 mSDtfsCounter, 2308 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1890 GetRequests, 1683 SyntacticMatches, 15 SemanticMatches, 192 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 15.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=162occurred in iteration=10, 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: 0.4s AutomataMinimizationTime, 15 MinimizatonAttempts, 79 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 16.8s InterpolantComputationTime, 1928 NumberOfCodeBlocks, 1801 NumberOfCodeBlocksAsserted, 36 NumberOfCheckSat, 2028 ConstructedInterpolants, 0 QuantifiedInterpolants, 20692 SizeOfPredicates, 25 NumberOfNonLiveVariables, 2125 ConjunctsInSsa, 301 ConjunctsInUnsatCore, 27 InterpolantComputations, 6 PerfectInterpolantSequences, 8825/9435 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: 33]: Loop Invariant Derived loop invariant: ((((((((A == r) && (((long long) A + d) == ((long long) p + r))) && (8 <= p)) && (q == 0)) && (B == 1)) || ((((((A == r) && (p == 2)) && (1 <= r)) && (d == 2)) && (q == 0)) && (B == 1))) || ((((((A == r) && (d == 4)) && (2 <= r)) && (q == 0)) && (B == 1)) && (p == 4))) || (((((A == r) && (d == 1)) && (q == 0)) && (B == 1)) && (p == 1))) - InvariantResult [Line: 43]: Loop Invariant Derived loop invariant: ((((A == ((long long) q + r)) && (d == p)) && (1 <= p)) && (B == 1)) - 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! [2024-09-18 15:54:29,055 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE