./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 de325976 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/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-de32597-m [2024-09-18 15:47:53,786 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:47:53,842 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:47:53,847 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:47:53,847 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:47:53,864 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:47:53,865 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:47:53,865 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:47:53,865 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:47:53,866 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:47:53,866 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:47:53,866 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:47:53,867 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:47:53,867 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:47:53,867 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:47:53,868 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:47:53,868 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:47:53,868 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:47:53,868 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:47:53,869 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:47:53,869 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:47:53,869 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:47:53,870 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:47:53,870 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:47:53,870 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:47:53,871 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:47:53,871 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:47:53,871 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:47:53,871 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:47:53,872 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:47:53,872 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:47:53,872 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:47:53,872 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:47:53,873 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:47:53,873 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:47:53,873 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:47:53,873 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:47:53,874 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:47:53,874 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:47:53,874 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:47:53,874 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:47:53,875 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:47:53,875 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ff2ea40d6d25fb86e36a6b6b626bedee46fbbe211877b096a26da0b150125568 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:47:54,064 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:47:54,089 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:47:54,091 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:47:54,092 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:47:54,092 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:47:54,093 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2024-09-18 15:47:55,312 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:47:55,469 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:47:55,470 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/sum_natnum.c [2024-09-18 15:47:55,476 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/75e57b89e/b747e24b888748ae9b5d4bf9c80a16c8/FLAG83272be4d [2024-09-18 15:47:55,861 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/75e57b89e/b747e24b888748ae9b5d4bf9c80a16c8 [2024-09-18 15:47:55,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:47:55,865 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:47:55,866 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:47:55,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:47:55,872 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:47:55,872 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:47:55" (1/1) ... [2024-09-18 15:47:55,873 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3de700c9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:55, skipping insertion in model container [2024-09-18 15:47:55,875 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:47:55" (1/1) ... [2024-09-18 15:47:55,896 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:47:56,010 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] [2024-09-18 15:47:56,017 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:47:56,024 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:47:56,032 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] [2024-09-18 15:47:56,035 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:47:56,052 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:47:56,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56 WrapperNode [2024-09-18 15:47:56,052 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:47:56,054 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:47:56,054 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:47:56,054 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:47:56,059 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,063 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,068 INFO L138 Inliner]: procedures = 14, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:47:56,068 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:47:56,069 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:47:56,069 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:47:56,069 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:47:56,077 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,077 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,078 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,110 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]. [2024-09-18 15:47:56,110 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,111 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,115 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,117 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,117 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,118 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,119 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:47:56,120 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:47:56,121 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:47:56,121 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:47:56,121 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (1/1) ... [2024-09-18 15:47:56,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:47:56,133 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:56,149 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-18 15:47:56,159 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-18 15:47:56,217 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:47:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:47:56,218 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:47:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:47:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:47:56,218 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:47:56,218 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:47:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:47:56,223 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:47:56,223 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:47:56,283 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:47:56,285 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:47:56,358 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-18 15:47:56,359 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:47:56,372 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:47:56,372 INFO L318 CfgBuilder]: Removed 1 assume(true) statements. [2024-09-18 15:47:56,372 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:47:56 BoogieIcfgContainer [2024-09-18 15:47:56,373 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:47:56,374 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:47:56,374 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:47:56,377 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:47:56,377 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:47:55" (1/3) ... [2024-09-18 15:47:56,377 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a718f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:47:56, skipping insertion in model container [2024-09-18 15:47:56,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:47:56" (2/3) ... [2024-09-18 15:47:56,378 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6a718f40 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:47:56, skipping insertion in model container [2024-09-18 15:47:56,378 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:47:56" (3/3) ... [2024-09-18 15:47:56,379 INFO L112 eAbstractionObserver]: Analyzing ICFG sum_natnum.c [2024-09-18 15:47:56,390 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:47:56,391 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:47:56,445 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:47:56,450 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;@342ba11b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:47:56,450 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:47:56,453 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) [2024-09-18 15:47:56,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:47:56,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:56,458 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:56,458 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:56,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:56,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1806673274, now seen corresponding path program 1 times [2024-09-18 15:47:56,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:56,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851527860] [2024-09-18 15:47:56,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:56,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:56,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:56,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:56,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:56,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:56,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851527860] [2024-09-18 15:47:56,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851527860] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:56,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:56,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:47:56,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756468463] [2024-09-18 15:47:56,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:56,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:47:56,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:56,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:47:56,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:47:56,643 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) [2024-09-18 15:47:56,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:56,696 INFO L93 Difference]: Finished difference Result 28 states and 31 transitions. [2024-09-18 15:47:56,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:47:56,698 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 [2024-09-18 15:47:56,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:56,703 INFO L225 Difference]: With dead ends: 28 [2024-09-18 15:47:56,703 INFO L226 Difference]: Without dead ends: 11 [2024-09-18 15:47:56,705 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 [2024-09-18 15:47:56,707 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 [2024-09-18 15:47:56,710 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] [2024-09-18 15:47:56,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2024-09-18 15:47:56,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2024-09-18 15:47:56,735 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) [2024-09-18 15:47:56,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2024-09-18 15:47:56,736 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 10 [2024-09-18 15:47:56,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:56,736 INFO L474 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2024-09-18 15:47:56,737 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) [2024-09-18 15:47:56,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:56,737 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2024-09-18 15:47:56,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-18 15:47:56,737 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:56,738 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:56,738 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:47:56,738 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:56,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:56,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1810367358, now seen corresponding path program 1 times [2024-09-18 15:47:56,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:56,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811126186] [2024-09-18 15:47:56,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:56,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:56,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:56,825 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:56,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:56,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:56,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:56,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811126186] [2024-09-18 15:47:56,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811126186] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:47:56,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:47:56,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-18 15:47:56,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480447668] [2024-09-18 15:47:56,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:47:56,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-18 15:47:56,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:56,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-18 15:47:56,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-18 15:47:56,862 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) [2024-09-18 15:47:56,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:56,900 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2024-09-18 15:47:56,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-18 15:47:56,900 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 [2024-09-18 15:47:56,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:56,901 INFO L225 Difference]: With dead ends: 17 [2024-09-18 15:47:56,901 INFO L226 Difference]: Without dead ends: 12 [2024-09-18 15:47:56,901 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 [2024-09-18 15:47:56,902 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 [2024-09-18 15:47:56,903 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] [2024-09-18 15:47:56,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2024-09-18 15:47:56,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2024-09-18 15:47:56,911 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) [2024-09-18 15:47:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2024-09-18 15:47:56,911 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2024-09-18 15:47:56,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:56,912 INFO L474 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2024-09-18 15:47:56,912 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) [2024-09-18 15:47:56,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2024-09-18 15:47:56,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:47:56,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:56,913 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:56,913 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:47:56,913 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:56,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash -251275506, now seen corresponding path program 1 times [2024-09-18 15:47:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:56,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411648749] [2024-09-18 15:47:56,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:56,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:57,030 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:57,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411648749] [2024-09-18 15:47:57,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411648749] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:57,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196280705] [2024-09-18 15:47:57,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:57,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:57,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:57,091 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:47:57,093 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-18 15:47:57,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:57,141 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:47:57,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:57,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:57,252 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196280705] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:57,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:57,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-09-18 15:47:57,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812237864] [2024-09-18 15:47:57,253 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:57,253 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-18 15:47:57,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:57,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-18 15:47:57,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-09-18 15:47:57,254 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) [2024-09-18 15:47:57,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:57,343 INFO L93 Difference]: Finished difference Result 20 states and 22 transitions. [2024-09-18 15:47:57,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-18 15:47:57,343 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 [2024-09-18 15:47:57,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:57,344 INFO L225 Difference]: With dead ends: 20 [2024-09-18 15:47:57,344 INFO L226 Difference]: Without dead ends: 15 [2024-09-18 15:47:57,345 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 [2024-09-18 15:47:57,347 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 [2024-09-18 15:47:57,348 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] [2024-09-18 15:47:57,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-18 15:47:57,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-18 15:47:57,352 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) [2024-09-18 15:47:57,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2024-09-18 15:47:57,353 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 11 [2024-09-18 15:47:57,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:57,353 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2024-09-18 15:47:57,353 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) [2024-09-18 15:47:57,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:57,355 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2024-09-18 15:47:57,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:47:57,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:57,355 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:57,368 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-18 15:47:57,559 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:57,560 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:57,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:57,560 INFO L85 PathProgramCache]: Analyzing trace with hash 1308639106, now seen corresponding path program 2 times [2024-09-18 15:47:57,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:57,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030407104] [2024-09-18 15:47:57,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:57,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:57,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:57,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:57,703 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030407104] [2024-09-18 15:47:57,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030407104] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:57,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546711179] [2024-09-18 15:47:57,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:47:57,703 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:57,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:57,705 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:47:57,709 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-18 15:47:57,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:47:57,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:57,752 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:47:57,753 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:57,818 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,819 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:57,910 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:57,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546711179] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:57,912 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:57,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 20 [2024-09-18 15:47:57,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91513136] [2024-09-18 15:47:57,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:57,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-18 15:47:57,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:57,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-18 15:47:57,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=231, Unknown=0, NotChecked=0, Total=380 [2024-09-18 15:47:57,916 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) [2024-09-18 15:47:58,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:58,061 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2024-09-18 15:47:58,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-18 15:47:58,062 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 [2024-09-18 15:47:58,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:58,062 INFO L225 Difference]: With dead ends: 26 [2024-09-18 15:47:58,063 INFO L226 Difference]: Without dead ends: 21 [2024-09-18 15:47:58,063 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=329, Invalid=601, Unknown=0, NotChecked=0, Total=930 [2024-09-18 15:47:58,064 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 [2024-09-18 15:47:58,064 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] [2024-09-18 15:47:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-18 15:47:58,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-18 15:47:58,073 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) [2024-09-18 15:47:58,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2024-09-18 15:47:58,074 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 14 [2024-09-18 15:47:58,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:58,074 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2024-09-18 15:47:58,075 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) [2024-09-18 15:47:58,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:58,076 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2024-09-18 15:47:58,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-18 15:47:58,076 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:58,077 INFO L216 NwaCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:58,089 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-18 15:47:58,277 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:58,277 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:58,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:58,278 INFO L85 PathProgramCache]: Analyzing trace with hash 2151426, now seen corresponding path program 3 times [2024-09-18 15:47:58,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:58,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646951115] [2024-09-18 15:47:58,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:58,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:58,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:58,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:58,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:58,489 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:58,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646951115] [2024-09-18 15:47:58,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646951115] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:58,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320373566] [2024-09-18 15:47:58,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:47:58,491 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:58,491 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:58,497 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:47:58,499 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-18 15:47:58,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:47:58,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:47:58,544 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:47:58,545 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:47:58,696 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:58,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:47:58,921 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:58,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320373566] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:47:58,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:47:58,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 38 [2024-09-18 15:47:58,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679432356] [2024-09-18 15:47:58,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:47:58,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-18 15:47:58,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:47:58,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-18 15:47:58,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=581, Invalid=825, Unknown=0, NotChecked=0, Total=1406 [2024-09-18 15:47:58,924 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) [2024-09-18 15:47:59,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:59,269 INFO L93 Difference]: Finished difference Result 38 states and 49 transitions. [2024-09-18 15:47:59,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-18 15:47:59,269 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 [2024-09-18 15:47:59,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:59,270 INFO L225 Difference]: With dead ends: 38 [2024-09-18 15:47:59,270 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 15:47:59,271 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 [2024-09-18 15:47:59,271 INFO L434 NwaCegarLoop]: 3 mSDtfsCounter, 45 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s 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, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:59,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 8 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:47:59,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 15:47:59,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-18 15:47:59,277 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) [2024-09-18 15:47:59,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2024-09-18 15:47:59,277 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 20 [2024-09-18 15:47:59,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:59,278 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2024-09-18 15:47:59,278 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) [2024-09-18 15:47:59,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:59,278 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2024-09-18 15:47:59,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-18 15:47:59,279 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:59,279 INFO L216 NwaCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:59,291 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-18 15:47:59,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:59,480 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:59,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:59,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1425679102, now seen corresponding path program 4 times [2024-09-18 15:47:59,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:59,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297551869] [2024-09-18 15:47:59,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:59,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:59,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:59,947 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:47:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:47:59,954 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:47:59,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:47:59,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297551869] [2024-09-18 15:47:59,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297551869] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:47:59,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650808508] [2024-09-18 15:47:59,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:47:59,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:47:59,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:47:59,956 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:47:59,958 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-18 15:48:00,011 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:48:00,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:48:00,012 INFO L262 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-18 15:48:00,014 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:00,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:48:01,129 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:01,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650808508] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:48:01,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:48:01,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 74 [2024-09-18 15:48:01,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869290482] [2024-09-18 15:48:01,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:48:01,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2024-09-18 15:48:01,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:01,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2024-09-18 15:48:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2309, Invalid=3093, Unknown=0, NotChecked=0, Total=5402 [2024-09-18 15:48:01,135 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) [2024-09-18 15:48:02,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:48:02,351 INFO L93 Difference]: Finished difference Result 62 states and 85 transitions. [2024-09-18 15:48:02,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2024-09-18 15:48:02,352 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 [2024-09-18 15:48:02,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:02,354 INFO L225 Difference]: With dead ends: 62 [2024-09-18 15:48:02,354 INFO L226 Difference]: Without dead ends: 57 [2024-09-18 15:48:02,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4319 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4982, Invalid=9538, Unknown=0, NotChecked=0, Total=14520 [2024-09-18 15:48:02,358 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 [2024-09-18 15:48:02,358 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] [2024-09-18 15:48:02,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-18 15:48:02,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-18 15:48:02,367 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) [2024-09-18 15:48:02,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2024-09-18 15:48:02,368 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 32 [2024-09-18 15:48:02,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:02,368 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2024-09-18 15:48:02,369 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) [2024-09-18 15:48:02,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:02,369 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2024-09-18 15:48:02,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-18 15:48:02,370 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:02,370 INFO L216 NwaCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:02,383 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-18 15:48:02,570 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 [2024-09-18 15:48:02,571 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:02,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:02,572 INFO L85 PathProgramCache]: Analyzing trace with hash 4157186, now seen corresponding path program 5 times [2024-09-18 15:48:02,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:02,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234916639] [2024-09-18 15:48:02,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:02,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:02,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:03,909 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:03,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:03,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234916639] [2024-09-18 15:48:03,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234916639] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:03,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856474193] [2024-09-18 15:48:03,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:48:03,915 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:03,916 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:03,917 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:48:03,920 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-18 15:48:03,975 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2024-09-18 15:48:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:48:03,977 INFO L262 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 49 conjuncts are in the unsatisfiable core [2024-09-18 15:48:03,979 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:05,095 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:05,095 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:48:07,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:07,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856474193] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:48:07,589 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:48:07,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 146 [2024-09-18 15:48:07,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723368199] [2024-09-18 15:48:07,589 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:48:07,590 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2024-09-18 15:48:07,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:07,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2024-09-18 15:48:07,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9221, Invalid=11949, Unknown=0, NotChecked=0, Total=21170 [2024-09-18 15:48:07,602 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) [2024-09-18 15:48:10,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:48:10,882 INFO L93 Difference]: Finished difference Result 110 states and 157 transitions. [2024-09-18 15:48:10,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2024-09-18 15:48:10,882 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 [2024-09-18 15:48:10,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:10,884 INFO L225 Difference]: With dead ends: 110 [2024-09-18 15:48:10,884 INFO L226 Difference]: Without dead ends: 105 [2024-09-18 15:48:10,891 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17855 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=19754, Invalid=38086, Unknown=0, NotChecked=0, Total=57840 [2024-09-18 15:48:10,892 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 [2024-09-18 15:48:10,892 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] [2024-09-18 15:48:10,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2024-09-18 15:48:10,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2024-09-18 15:48:10,900 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) [2024-09-18 15:48:10,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2024-09-18 15:48:10,901 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 56 [2024-09-18 15:48:10,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:10,902 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2024-09-18 15:48:10,902 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) [2024-09-18 15:48:10,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:10,902 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2024-09-18 15:48:10,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2024-09-18 15:48:10,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:10,903 INFO L216 NwaCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:10,919 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-18 15:48:11,107 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 [2024-09-18 15:48:11,108 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:11,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:11,108 INFO L85 PathProgramCache]: Analyzing trace with hash 527471362, now seen corresponding path program 6 times [2024-09-18 15:48:11,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:11,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737854682] [2024-09-18 15:48:11,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:11,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:11,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:15,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:15,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:15,155 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:15,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737854682] [2024-09-18 15:48:15,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737854682] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:15,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [539011596] [2024-09-18 15:48:15,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:48:15,158 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:15,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:15,160 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:48:15,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-18 15:48:15,302 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 48 check-sat command(s) [2024-09-18 15:48:15,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:48:15,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-18 15:48:15,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:19,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:48:29,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:29,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [539011596] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:48:29,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:48:29,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98, 98] total 290 [2024-09-18 15:48:29,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [899960339] [2024-09-18 15:48:29,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:48:29,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 290 states [2024-09-18 15:48:29,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:48:29,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 290 interpolants. [2024-09-18 15:48:29,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36869, Invalid=46941, Unknown=0, NotChecked=0, Total=83810 [2024-09-18 15:48:29,236 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) [2024-09-18 15:48:41,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:48:41,830 INFO L93 Difference]: Finished difference Result 206 states and 301 transitions. [2024-09-18 15:48:41,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2024-09-18 15:48:41,831 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 [2024-09-18 15:48:41,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:48:41,832 INFO L225 Difference]: With dead ends: 206 [2024-09-18 15:48:41,832 INFO L226 Difference]: Without dead ends: 201 [2024-09-18 15:48:41,842 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 497 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 479 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72575 ImplicationChecksByTransitivity, 28.2s TimeCoverageRelationStatistics Valid=78674, Invalid=152206, Unknown=0, NotChecked=0, Total=230880 [2024-09-18 15:48:41,842 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 [2024-09-18 15:48:41,843 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] [2024-09-18 15:48:41,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-18 15:48:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-09-18 15:48:41,896 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) [2024-09-18 15:48:41,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2024-09-18 15:48:41,897 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 104 [2024-09-18 15:48:41,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:48:41,897 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2024-09-18 15:48:41,898 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) [2024-09-18 15:48:41,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:41,898 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2024-09-18 15:48:41,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2024-09-18 15:48:41,900 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:48:41,900 INFO L216 NwaCegarLoop]: trace histogram [190, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:48:41,913 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-18 15:48:42,104 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 [2024-09-18 15:48:42,105 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:48:42,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:48:42,106 INFO L85 PathProgramCache]: Analyzing trace with hash -389358846, now seen corresponding path program 7 times [2024-09-18 15:48:42,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:48:42,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062503662] [2024-09-18 15:48:42,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:48:42,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:48:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:56,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:56,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:56,564 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:48:56,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:56,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062503662] [2024-09-18 15:48:56,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062503662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:56,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9079157] [2024-09-18 15:48:56,564 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:48:56,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:56,565 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:56,566 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:48:56,567 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-18 15:48:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:56,702 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 193 conjuncts are in the unsatisfiable core [2024-09-18 15:48:56,707 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:49:10,046 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:10,046 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 18145 backedges. 0 proven. 18145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:49:42,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9079157] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:42,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:42,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [194, 194, 194] total 578 [2024-09-18 15:49:42,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284936206] [2024-09-18 15:49:42,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:42,833 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 578 states [2024-09-18 15:49:42,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:42,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 578 interpolants. [2024-09-18 15:49:42,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=147461, Invalid=186045, Unknown=0, NotChecked=0, Total=333506 [2024-09-18 15:49:42,866 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) [2024-09-18 15:50:35,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:50:35,947 INFO L93 Difference]: Finished difference Result 398 states and 589 transitions. [2024-09-18 15:50:35,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 387 states. [2024-09-18 15:50:35,948 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 [2024-09-18 15:50:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:50:35,950 INFO L225 Difference]: With dead ends: 398 [2024-09-18 15:50:35,950 INFO L226 Difference]: Without dead ends: 393 [2024-09-18 15:50:35,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 977 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 959 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292607 ImplicationChecksByTransitivity, 106.3s TimeCoverageRelationStatistics Valid=314018, Invalid=608542, Unknown=0, NotChecked=0, Total=922560 [2024-09-18 15:50:35,993 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 [2024-09-18 15:50:35,993 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] [2024-09-18 15:50:35,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2024-09-18 15:50:36,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 393. [2024-09-18 15:50:36,041 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) [2024-09-18 15:50:36,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 393 states to 393 states and 393 transitions. [2024-09-18 15:50:36,046 INFO L78 Accepts]: Start accepts. Automaton has 393 states and 393 transitions. Word has length 200 [2024-09-18 15:50:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:50:36,047 INFO L474 AbstractCegarLoop]: Abstraction has 393 states and 393 transitions. [2024-09-18 15:50:36,047 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) [2024-09-18 15:50:36,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:36,048 INFO L276 IsEmpty]: Start isEmpty. Operand 393 states and 393 transitions. [2024-09-18 15:50:36,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 393 [2024-09-18 15:50:36,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:50:36,056 INFO L216 NwaCegarLoop]: trace histogram [382, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:50:36,072 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-18 15:50:36,257 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 [2024-09-18 15:50:36,257 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:50:36,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:50:36,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1734306562, now seen corresponding path program 8 times [2024-09-18 15:50:36,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:50:36,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645831232] [2024-09-18 15:50:36,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:50:36,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:50:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:42,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:51:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:51:42,854 INFO L134 CoverageAnalysis]: Checked inductivity of 73153 backedges. 0 proven. 73153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-18 15:51:42,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:51:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645831232] [2024-09-18 15:51:42,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645831232] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:51:42,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119428814] [2024-09-18 15:51:42,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:51:42,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:51:42,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:51:42,857 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:51:42,858 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:51:43,104 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:51:43,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:51:43,124 INFO L262 TraceCheckSpWp]: Trace formula consists of 1956 conjuncts, 385 conjuncts are in the unsatisfiable core [2024-09-18 15:51:43,176 INFO L285 TraceCheckSpWp]: Computing forward predicates...