./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/sum_natnum.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 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/sum_natnum.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 ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 --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-6908dde-m [2024-09-24 23:14:55,951 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:14:56,013 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:14:56,018 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:14:56,019 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:14:56,043 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:14:56,045 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:14:56,045 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:14:56,046 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:14:56,047 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:14:56,047 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:14:56,047 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:14:56,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:14:56,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:14:56,048 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:14:56,048 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:14:56,048 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:14:56,048 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:14:56,049 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:14:56,049 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:14:56,052 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:14:56,053 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:14:56,053 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:14:56,053 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:14:56,053 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:14:56,053 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:14:56,054 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:14:56,054 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:14:56,055 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:14:56,055 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:14:56,055 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:14:56,055 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:14:56,055 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:14:56,055 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:14:56,056 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:14:56,056 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:14:56,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:14:56,060 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:14:56,243 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:14:56,263 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:14:56,265 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:14:56,266 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:14:56,266 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:14:56,267 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2024-09-24 23:14:57,535 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:14:57,655 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:14:57,656 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2024-09-24 23:14:57,661 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/8a2c7a55c/9941f3ade04f4626ad42e8c2b486af13/FLAG049755a98 [2024-09-24 23:14:58,081 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/8a2c7a55c/9941f3ade04f4626ad42e8c2b486af13 [2024-09-24 23:14:58,084 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:14:58,085 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:14:58,087 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:14:58,087 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:14:58,091 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:14:58,091 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,092 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6c1ec180 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58, skipping insertion in model container [2024-09-24 23:14:58,092 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,110 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:14:58,216 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2024-09-24 23:14:58,227 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:14:58,234 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:14:58,242 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/sum_natnum.c[458,471] [2024-09-24 23:14:58,243 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:14:58,254 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:14:58,255 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58 WrapperNode [2024-09-24 23:14:58,255 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:14:58,256 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:14:58,256 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:14:58,256 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:14:58,260 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,265 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,269 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:14:58,269 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:14:58,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:14:58,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:14:58,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:14:58,276 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,276 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,277 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,284 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 23:14:58,285 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,285 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,286 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,288 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,289 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,289 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,290 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:14:58,291 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:14:58,291 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:14:58,291 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:14:58,291 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (1/1) ... [2024-09-24 23:14:58,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:14:58,304 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:14:58,319 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) [2024-09-24 23:14:58,320 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 [2024-09-24 23:14:58,350 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:14:58,350 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:14:58,350 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:14:58,351 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:14:58,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:14:58,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:14:58,351 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:14:58,351 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:14:58,351 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:14:58,351 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:14:58,395 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:14:58,397 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:14:58,486 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-24 23:14:58,486 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:14:58,501 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:14:58,501 INFO L317 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-24 23:14:58,501 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:14:58 BoogieIcfgContainer [2024-09-24 23:14:58,501 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:14:58,504 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:14:58,504 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:14:58,507 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:14:58,507 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:14:58" (1/3) ... [2024-09-24 23:14:58,509 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4a94c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:14:58, skipping insertion in model container [2024-09-24 23:14:58,509 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:14:58" (2/3) ... [2024-09-24 23:14:58,511 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b4a94c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:14:58, skipping insertion in model container [2024-09-24 23:14:58,511 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:14:58" (3/3) ... [2024-09-24 23:14:58,512 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2024-09-24 23:14:58,526 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:14:58,526 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:14:58,571 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:14:58,577 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;@23c71b75, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:14:58,578 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:14:58,582 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:14:58,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-24 23:14:58,589 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:14:58,590 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:14:58,591 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:14:58,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:58,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1806673274, now seen corresponding path program 1 times [2024-09-24 23:14:58,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:14:58,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042677927] [2024-09-24 23:14:58,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:14:58,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:14:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:58,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:14:58,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:58,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:14:58,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042677927] [2024-09-24 23:14:58,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042677927] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:14:58,748 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:14:58,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:14:58,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623588727] [2024-09-24 23:14:58,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:14:58,754 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:14:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:14:58,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:14:58,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:14:58,778 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:58,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:14:58,836 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-09-24 23:14:58,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:14:58,838 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-24 23:14:58,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:14:58,843 INFO L225 Difference]: With dead ends: 28 [2024-09-24 23:14:58,843 INFO L226 Difference]: Without dead ends: 11 [2024-09-24 23:14:58,845 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:14:58,847 INFO L434 NwaCegarLoop]: 5 mSDtfsCounter, 10 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:14:58,848 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:14:58,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-24 23:14:58,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-24 23:14:58,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 6 states have internal predecessors, (7), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:58,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-09-24 23:14:58,873 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2024-09-24 23:14:58,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:14:58,873 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-09-24 23:14:58,874 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 2 states have internal predecessors, (6), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:58,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:58,874 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-09-24 23:14:58,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-24 23:14:58,875 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:14:58,875 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:14:58,875 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:14:58,877 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:14:58,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:58,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1810367358, now seen corresponding path program 1 times [2024-09-24 23:14:58,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:14:58,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580733266] [2024-09-24 23:14:58,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:14:58,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:14:58,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:58,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:14:58,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:14:59,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580733266] [2024-09-24 23:14:59,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580733266] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:14:59,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:14:59,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:14:59,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989705013] [2024-09-24 23:14:59,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:14:59,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:14:59,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:14:59,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:14:59,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:14:59,011 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:59,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:14:59,061 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-24 23:14:59,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:14:59,063 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-24 23:14:59,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:14:59,064 INFO L225 Difference]: With dead ends: 17 [2024-09-24 23:14:59,064 INFO L226 Difference]: Without dead ends: 12 [2024-09-24 23:14:59,064 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:14:59,065 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 13 mSDsluCounter, 1 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:14:59,065 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 4 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:14:59,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-24 23:14:59,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-24 23:14:59,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:59,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-24 23:14:59,078 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-24 23:14:59,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:14:59,078 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-24 23:14:59,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 3 states have internal predecessors, (6), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:59,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:59,079 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-24 23:14:59,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-24 23:14:59,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:14:59,079 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:14:59,079 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:14:59,080 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:14:59,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:59,080 INFO L85 PathProgramCache]: Analyzing trace with hash -251275506, now seen corresponding path program 1 times [2024-09-24 23:14:59,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:14:59,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705691292] [2024-09-24 23:14:59,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:14:59,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:14:59,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:14:59,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,228 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:14:59,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705691292] [2024-09-24 23:14:59,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705691292] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:14:59,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516668348] [2024-09-24 23:14:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:14:59,242 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:14:59,242 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:14:59,243 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) [2024-09-24 23:14:59,244 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:14:59,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,281 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-24 23:14:59,284 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:14:59,352 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:14:59,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516668348] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:14:59,399 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:14:59,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-09-24 23:14:59,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119260112] [2024-09-24 23:14:59,400 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:14:59,400 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:14:59,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:14:59,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:14:59,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:14:59,401 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:14:59,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:14:59,493 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2024-09-24 23:14:59,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:14:59,494 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 11 [2024-09-24 23:14:59,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:14:59,494 INFO L225 Difference]: With dead ends: 20 [2024-09-24 23:14:59,494 INFO L226 Difference]: Without dead ends: 15 [2024-09-24 23:14:59,496 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=151, Unknown=0, NotChecked=0, Total=240 [2024-09-24 23:14:59,497 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 18 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:14:59,497 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 6 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:14:59,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-24 23:14:59,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-24 23:14:59,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:14:59,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-24 23:14:59,502 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2024-09-24 23:14:59,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:14:59,502 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-24 23:14:59,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 9 states have internal predecessors, (15), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:14:59,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:59,503 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-24 23:14:59,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-24 23:14:59,503 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:14:59,503 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:14:59,517 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-24 23:14:59,704 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 [2024-09-24 23:14:59,704 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:14:59,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:14:59,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1308639106, now seen corresponding path program 2 times [2024-09-24 23:14:59,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:14:59,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366458549] [2024-09-24 23:14:59,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:14:59,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:14:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:14:59,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:14:59,868 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:14:59,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366458549] [2024-09-24 23:14:59,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366458549] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:14:59,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2065873499] [2024-09-24 23:14:59,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:14:59,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:14:59,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:14:59,870 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) [2024-09-24 23:14:59,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:14:59,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:14:59,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:14:59,911 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-24 23:14:59,912 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:14:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:14:59,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:00,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2065873499] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:00,088 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:00,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-09-24 23:15:00,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703659334] [2024-09-24 23:15:00,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:00,089 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-24 23:15:00,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-24 23:15:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2024-09-24 23:15:00,090 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:00,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:00,255 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-09-24 23:15:00,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-24 23:15:00,255 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 14 [2024-09-24 23:15:00,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:00,256 INFO L225 Difference]: With dead ends: 26 [2024-09-24 23:15:00,256 INFO L226 Difference]: Without dead ends: 21 [2024-09-24 23:15:00,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2024-09-24 23:15:00,257 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 38 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:00,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 5 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:15:00,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-24 23:15:00,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-24 23:15:00,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.0625) internal successors, (17), 16 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:00,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2024-09-24 23:15:00,262 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2024-09-24 23:15:00,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:00,262 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2024-09-24 23:15:00,262 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 18 states have internal predecessors, (24), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:00,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:00,262 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2024-09-24 23:15:00,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 23:15:00,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:00,263 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:00,275 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:15:00,467 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 [2024-09-24 23:15:00,468 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:00,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:00,468 INFO L85 PathProgramCache]: Analyzing trace with hash 2151426, now seen corresponding path program 3 times [2024-09-24 23:15:00,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:00,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408113650] [2024-09-24 23:15:00,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:00,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:00,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:00,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:00,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408113650] [2024-09-24 23:15:00,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408113650] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:00,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146444056] [2024-09-24 23:15:00,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:15:00,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:00,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:00,669 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) [2024-09-24 23:15:00,672 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:15:00,708 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-24 23:15:00,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:15:00,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:15:00,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:00,863 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:00,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:01,085 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:01,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146444056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:01,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:01,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-09-24 23:15:01,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186839327] [2024-09-24 23:15:01,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:01,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-24 23:15:01,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:01,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-24 23:15:01,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2024-09-24 23:15:01,088 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:01,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:01,456 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-24 23:15:01,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-24 23:15:01,456 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 20 [2024-09-24 23:15:01,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:01,457 INFO L225 Difference]: With dead ends: 38 [2024-09-24 23:15:01,457 INFO L226 Difference]: Without dead ends: 33 [2024-09-24 23:15:01,458 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1007 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1268, Invalid=2392, Unknown=0, NotChecked=0, Total=3660 [2024-09-24 23:15:01,459 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:01,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:15:01,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-24 23:15:01,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-24 23:15:01,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:01,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2024-09-24 23:15:01,465 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2024-09-24 23:15:01,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:01,465 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2024-09-24 23:15:01,465 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 36 states have internal predecessors, (42), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:01,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:01,466 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2024-09-24 23:15:01,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-24 23:15:01,466 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:01,466 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:01,479 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:15:01,666 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 [2024-09-24 23:15:01,667 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:01,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:01,667 INFO L85 PathProgramCache]: Analyzing trace with hash -1425679102, now seen corresponding path program 4 times [2024-09-24 23:15:01,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:01,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637057923] [2024-09-24 23:15:01,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:01,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:01,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:02,096 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:02,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:02,101 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:02,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:02,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637057923] [2024-09-24 23:15:02,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637057923] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:02,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426058883] [2024-09-24 23:15:02,102 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:15:02,102 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:02,102 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:02,104 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) [2024-09-24 23:15:02,106 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:15:02,151 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:15:02,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:15:02,152 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-24 23:15:02,154 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:02,517 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:02,518 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:03,161 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:03,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426058883] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:03,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:03,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-09-24 23:15:03,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262015618] [2024-09-24 23:15:03,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:03,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-24 23:15:03,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:03,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-24 23:15:03,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2309, Invalid=3093, Unknown=0, NotChecked=0, Total=5402 [2024-09-24 23:15:03,165 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:04,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:04,202 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2024-09-24 23:15:04,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-24 23:15:04,202 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 32 [2024-09-24 23:15:04,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:04,203 INFO L225 Difference]: With dead ends: 62 [2024-09-24 23:15:04,203 INFO L226 Difference]: Without dead ends: 57 [2024-09-24 23:15:04,207 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4319 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4982, Invalid=9538, Unknown=0, NotChecked=0, Total=14520 [2024-09-24 23:15:04,207 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 81 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:04,207 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 9 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:15:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-24 23:15:04,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-24 23:15:04,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:04,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2024-09-24 23:15:04,217 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2024-09-24 23:15:04,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:04,218 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2024-09-24 23:15:04,218 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 72 states have internal predecessors, (78), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:04,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:04,218 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2024-09-24 23:15:04,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-24 23:15:04,219 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:04,219 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:04,232 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-24 23:15:04,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:04,420 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:04,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:04,421 INFO L85 PathProgramCache]: Analyzing trace with hash 4157186, now seen corresponding path program 5 times [2024-09-24 23:15:04,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:04,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812746982] [2024-09-24 23:15:04,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:04,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:04,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:05,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:05,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:05,643 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:05,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:05,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812746982] [2024-09-24 23:15:05,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812746982] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:05,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843659706] [2024-09-24 23:15:05,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:15:05,644 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:05,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:05,645 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) [2024-09-24 23:15:05,646 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:15:05,705 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-24 23:15:05,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:15:05,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-24 23:15:05,709 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:06,715 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:06,715 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:08,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:08,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843659706] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:08,733 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:08,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 146 [2024-09-24 23:15:08,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644555774] [2024-09-24 23:15:08,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:08,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-09-24 23:15:08,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:08,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-09-24 23:15:08,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9221, Invalid=11949, Unknown=0, NotChecked=0, Total=21170 [2024-09-24 23:15:08,741 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 146 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 144 states have internal predecessors, (150), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:11,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:11,758 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2024-09-24 23:15:11,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-09-24 23:15:11,758 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 144 states have internal predecessors, (150), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 56 [2024-09-24 23:15:11,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:11,759 INFO L225 Difference]: With dead ends: 110 [2024-09-24 23:15:11,759 INFO L226 Difference]: Without dead ends: 105 [2024-09-24 23:15:11,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17855 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=19754, Invalid=38086, Unknown=0, NotChecked=0, Total=57840 [2024-09-24 23:15:11,764 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 206 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 155 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:11,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [206 Valid, 8 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 155 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:15:11,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-24 23:15:11,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-09-24 23:15:11,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.01) internal successors, (101), 100 states have internal predecessors, (101), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:11,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2024-09-24 23:15:11,774 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2024-09-24 23:15:11,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:11,774 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2024-09-24 23:15:11,774 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 146 states have (on average 1.0273972602739727) internal successors, (150), 144 states have internal predecessors, (150), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:11,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:11,775 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2024-09-24 23:15:11,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-24 23:15:11,776 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:11,777 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:11,789 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:15:11,977 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-24 23:15:11,977 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:11,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:11,978 INFO L85 PathProgramCache]: Analyzing trace with hash 527471362, now seen corresponding path program 6 times [2024-09-24 23:15:11,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:11,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409200101] [2024-09-24 23:15:11,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:11,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:12,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:15,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:15,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:15,697 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:15,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409200101] [2024-09-24 23:15:15,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409200101] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:15,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689699967] [2024-09-24 23:15:15,697 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:15:15,697 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:15,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:15,699 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) [2024-09-24 23:15:15,700 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:15:15,805 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-24 23:15:15,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:15:15,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-24 23:15:15,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:15:18,950 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:18,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:15:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:26,865 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689699967] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:15:26,865 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:15:26,865 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 290 [2024-09-24 23:15:26,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362973462] [2024-09-24 23:15:26,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:15:26,866 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 290 states [2024-09-24 23:15:26,866 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:15:26,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 290 interpolants. [2024-09-24 23:15:26,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36869, Invalid=46941, Unknown=0, NotChecked=0, Total=83810 [2024-09-24 23:15:26,875 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 290 states, 290 states have (on average 1.013793103448276) internal successors, (294), 288 states have internal predecessors, (294), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:38,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:15:38,219 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2024-09-24 23:15:38,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-09-24 23:15:38,220 INFO L78 Accepts]: Start accepts. Automaton has has 290 states, 290 states have (on average 1.013793103448276) internal successors, (294), 288 states have internal predecessors, (294), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 104 [2024-09-24 23:15:38,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:15:38,223 INFO L225 Difference]: With dead ends: 206 [2024-09-24 23:15:38,223 INFO L226 Difference]: Without dead ends: 201 [2024-09-24 23:15:38,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72575 ImplicationChecksByTransitivity, 23.9s TimeCoverageRelationStatistics Valid=78674, Invalid=152206, Unknown=0, NotChecked=0, Total=230880 [2024-09-24 23:15:38,234 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 297 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 340 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:15:38,235 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [297 Valid, 17 Invalid, 340 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:15:38,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-24 23:15:38,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-09-24 23:15:38,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:15:38,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2024-09-24 23:15:38,259 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2024-09-24 23:15:38,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:15:38,259 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2024-09-24 23:15:38,259 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 290 states, 290 states have (on average 1.013793103448276) internal successors, (294), 288 states have internal predecessors, (294), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:15:38,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:38,260 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2024-09-24 23:15:38,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-24 23:15:38,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:15:38,262 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:15:38,274 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:15:38,463 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:38,463 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:15:38,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:15:38,464 INFO L85 PathProgramCache]: Analyzing trace with hash -389358846, now seen corresponding path program 7 times [2024-09-24 23:15:38,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:15:38,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050483785] [2024-09-24 23:15:38,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:15:38,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:15:38,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:52,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:15:52,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:52,467 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:15:52,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:15:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050483785] [2024-09-24 23:15:52,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050483785] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:15:52,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655599653] [2024-09-24 23:15:52,467 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:15:52,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:15:52,467 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:15:52,468 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) [2024-09-24 23:15:52,469 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:15:52,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:15:52,610 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-24 23:15:52,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:16:04,426 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:04,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:16:36,069 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:16:36,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655599653] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:16:36,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:16:36,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 578 [2024-09-24 23:16:36,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897671733] [2024-09-24 23:16:36,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:16:36,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 578 states [2024-09-24 23:16:36,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:16:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 578 interpolants. [2024-09-24 23:16:36,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147461, Invalid=186045, Unknown=0, NotChecked=0, Total=333506 [2024-09-24 23:16:36,098 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 578 states, 578 states have (on average 1.0069204152249136) internal successors, (582), 576 states have internal predecessors, (582), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:17:21,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:17:21,393 INFO L93 Difference]: Finished difference Result 398 states and 589 transitions. [2024-09-24 23:17:21,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2024-09-24 23:17:21,393 INFO L78 Accepts]: Start accepts. Automaton has has 578 states, 578 states have (on average 1.0069204152249136) internal successors, (582), 576 states have internal predecessors, (582), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 200 [2024-09-24 23:17:21,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:17:21,395 INFO L225 Difference]: With dead ends: 398 [2024-09-24 23:17:21,395 INFO L226 Difference]: Without dead ends: 393 [2024-09-24 23:17:21,432 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 959 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292607 ImplicationChecksByTransitivity, 96.1s TimeCoverageRelationStatistics Valid=314018, Invalid=608542, Unknown=0, NotChecked=0, Total=922560 [2024-09-24 23:17:21,432 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 585 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 585 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:17:21,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [585 Valid, 15 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:17:21,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-09-24 23:17:21,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2024-09-24 23:17:21,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 393 states, 388 states have (on average 1.0025773195876289) internal successors, (389), 388 states have internal predecessors, (389), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:17:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2024-09-24 23:17:21,463 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 200 [2024-09-24 23:17:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:17:21,464 INFO L474 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2024-09-24 23:17:21,464 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 578 states, 578 states have (on average 1.0069204152249136) internal successors, (582), 576 states have internal predecessors, (582), 4 states have call successors, (5), 5 states have call predecessors, (5), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-09-24 23:17:21,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2024-09-24 23:17:21,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2024-09-24 23:17:21,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:17:21,470 INFO L216 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:17:21,484 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-24 23:17:21,670 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:17:21,671 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:17:21,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:17:21,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1734306562, now seen corresponding path program 8 times [2024-09-24 23:17:21,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:17:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685537422] [2024-09-24 23:17:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:17:21,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:17:23,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:20,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:18:20,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:18:20,345 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:18:20,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:18:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685537422] [2024-09-24 23:18:20,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685537422] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:18:20,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209910935] [2024-09-24 23:18:20,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:18:20,346 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:18:20,346 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:18:20,348 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) [2024-09-24 23:18:20,349 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:18:20,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:18:20,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:18:20,611 INFO L262 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 385 conjuncts are in the unsatisfiable core [2024-09-24 23:18:20,619 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:19:04,291 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:19:04,291 INFO L327 TraceCheckSpWp]: Computing backward predicates...