./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.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/mono-crafted_14.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 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 --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 15:45:13,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-18 15:45:13,969 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-18 15:45:13,972 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-18 15:45:13,972 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-18 15:45:13,987 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-18 15:45:13,988 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-18 15:45:13,988 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-18 15:45:13,989 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-18 15:45:13,990 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-18 15:45:13,990 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-18 15:45:13,990 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-18 15:45:13,991 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-18 15:45:13,992 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-18 15:45:13,993 INFO L153 SettingsManager]: * Use SBE=true [2024-09-18 15:45:13,994 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-18 15:45:13,994 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-18 15:45:13,994 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-18 15:45:13,994 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-18 15:45:13,994 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-18 15:45:13,995 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-18 15:45:13,996 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-18 15:45:13,996 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-18 15:45:13,996 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-18 15:45:13,996 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-18 15:45:13,997 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-18 15:45:13,997 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-18 15:45:13,997 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-18 15:45:13,997 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-18 15:45:13,998 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-18 15:45:13,998 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-18 15:45:13,998 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-18 15:45:13,998 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:45:13,999 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-18 15:45:13,999 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-18 15:45:13,999 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-18 15:45:13,999 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-18 15:45:14,000 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-18 15:45:14,000 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-18 15:45:14,000 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-18 15:45:14,000 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-18 15:45:14,000 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-18 15:45:14,000 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 538775af36be57be36a6cd470d0ff7a3d7714753249a7d4cb9a7b907cdacda78 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-18 15:45:14,184 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-18 15:45:14,202 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-18 15:45:14,205 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-18 15:45:14,206 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-18 15:45:14,206 INFO L274 PluginConnector]: CDTParser initialized [2024-09-18 15:45:14,207 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2024-09-18 15:45:15,372 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-18 15:45:15,515 INFO L384 CDTParser]: Found 1 translation units. [2024-09-18 15:45:15,515 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/mono-crafted_14.c [2024-09-18 15:45:15,520 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/dec081758/da26371ca91a478799509a93cf13268f/FLAG293a371fe [2024-09-18 15:45:15,935 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/dec081758/da26371ca91a478799509a93cf13268f [2024-09-18 15:45:15,937 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-18 15:45:15,938 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-18 15:45:15,941 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-18 15:45:15,941 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-18 15:45:15,945 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-18 15:45:15,946 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:45:15" (1/1) ... [2024-09-18 15:45:15,947 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3372c0ef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:15, skipping insertion in model container [2024-09-18 15:45:15,949 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.09 03:45:15" (1/1) ... [2024-09-18 15:45:15,961 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-18 15:45:16,069 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/mono-crafted_14.c[319,332] [2024-09-18 15:45:16,080 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:45:16,090 INFO L200 MainTranslator]: Completed pre-run [2024-09-18 15:45:16,098 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/mono-crafted_14.c[319,332] [2024-09-18 15:45:16,101 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-18 15:45:16,124 INFO L204 MainTranslator]: Completed translation [2024-09-18 15:45:16,127 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16 WrapperNode [2024-09-18 15:45:16,127 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-18 15:45:16,128 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-18 15:45:16,130 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-18 15:45:16,130 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-18 15:45:16,137 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,142 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,149 INFO L138 Inliner]: procedures = 12, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-18 15:45:16,149 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-18 15:45:16,150 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-18 15:45:16,150 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-18 15:45:16,150 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-18 15:45:16,157 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,158 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,159 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,172 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 15:45:16,172 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,172 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,174 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,177 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,178 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,181 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,183 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-18 15:45:16,183 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-18 15:45:16,183 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-18 15:45:16,183 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-18 15:45:16,184 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (1/1) ... [2024-09-18 15:45:16,189 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-18 15:45:16,198 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:16,222 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 15:45:16,224 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 15:45:16,260 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-18 15:45:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-18 15:45:16,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-18 15:45:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-18 15:45:16,261 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-18 15:45:16,261 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-18 15:45:16,261 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-18 15:45:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-18 15:45:16,262 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-18 15:45:16,262 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-18 15:45:16,305 INFO L242 CfgBuilder]: Building ICFG [2024-09-18 15:45:16,307 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-18 15:45:16,399 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-18 15:45:16,399 INFO L291 CfgBuilder]: Performing block encoding [2024-09-18 15:45:16,412 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-18 15:45:16,412 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-18 15:45:16,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:45:16 BoogieIcfgContainer [2024-09-18 15:45:16,413 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-18 15:45:16,414 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-18 15:45:16,414 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-18 15:45:16,420 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-18 15:45:16,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.09 03:45:15" (1/3) ... [2024-09-18 15:45:16,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f506842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:45:16, skipping insertion in model container [2024-09-18 15:45:16,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.09 03:45:16" (2/3) ... [2024-09-18 15:45:16,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f506842 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.09 03:45:16, skipping insertion in model container [2024-09-18 15:45:16,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.09 03:45:16" (3/3) ... [2024-09-18 15:45:16,422 INFO L112 eAbstractionObserver]: Analyzing ICFG mono-crafted_14.c [2024-09-18 15:45:16,434 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-18 15:45:16,434 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-18 15:45:16,470 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-18 15:45:16,475 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;@6997633d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-18 15:45:16,475 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-18 15:45:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-18 15:45:16,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:45:16,484 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:16,484 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:16,485 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:16,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:16,489 INFO L85 PathProgramCache]: Analyzing trace with hash 1213422553, now seen corresponding path program 1 times [2024-09-18 15:45:16,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:16,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248433023] [2024-09-18 15:45:16,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:16,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:16,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,604 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:16,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,617 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 15:45:16,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:16,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248433023] [2024-09-18 15:45:16,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248433023] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:45:16,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:45:16,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-18 15:45:16,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942080495] [2024-09-18 15:45:16,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:45:16,624 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-18 15:45:16,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:16,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-18 15:45:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:45:16,645 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 12 states have internal predecessors, (18), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:16,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:16,667 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-18 15:45:16,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-18 15:45:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 15:45:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:16,675 INFO L225 Difference]: With dead ends: 33 [2024-09-18 15:45:16,675 INFO L226 Difference]: Without dead ends: 16 [2024-09-18 15:45:16,678 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-18 15:45:16,681 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:16,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 21 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:16,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-18 15:45:16,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-18 15:45:16,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 10 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:16,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 19 transitions. [2024-09-18 15:45:16,734 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 19 transitions. Word has length 11 [2024-09-18 15:45:16,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:16,755 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 19 transitions. [2024-09-18 15:45:16,756 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:16,756 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:16,756 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 19 transitions. [2024-09-18 15:45:16,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2024-09-18 15:45:16,757 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:16,757 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:16,757 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-18 15:45:16,757 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:16,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:16,757 INFO L85 PathProgramCache]: Analyzing trace with hash 923436959, now seen corresponding path program 1 times [2024-09-18 15:45:16,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:16,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174764145] [2024-09-18 15:45:16,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:16,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:16,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,854 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,869 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 15:45:16,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:16,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174764145] [2024-09-18 15:45:16,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174764145] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:45:16,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:45:16,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:45:16,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338155135] [2024-09-18 15:45:16,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:45:16,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:45:16,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:16,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:45:16,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:45:16,876 INFO L87 Difference]: Start difference. First operand 16 states and 19 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:16,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:16,897 INFO L93 Difference]: Finished difference Result 29 states and 37 transitions. [2024-09-18 15:45:16,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:45:16,898 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2024-09-18 15:45:16,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:16,899 INFO L225 Difference]: With dead ends: 29 [2024-09-18 15:45:16,899 INFO L226 Difference]: Without dead ends: 18 [2024-09-18 15:45:16,900 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 15:45:16,901 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:16,902 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 28 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:16,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-18 15:45:16,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-18 15:45:16,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 12 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:16,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 21 transitions. [2024-09-18 15:45:16,908 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 21 transitions. Word has length 11 [2024-09-18 15:45:16,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:16,912 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 21 transitions. [2024-09-18 15:45:16,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:16,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:16,914 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 21 transitions. [2024-09-18 15:45:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-18 15:45:16,914 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:16,914 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:16,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-18 15:45:16,915 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:16,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:16,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1421107102, now seen corresponding path program 1 times [2024-09-18 15:45:16,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:16,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [306029122] [2024-09-18 15:45:16,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:16,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:16,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,972 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:16,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:16,979 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:45:16,979 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:16,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [306029122] [2024-09-18 15:45:16,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [306029122] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-18 15:45:16,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-18 15:45:16,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-18 15:45:16,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831871643] [2024-09-18 15:45:16,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-18 15:45:16,980 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-18 15:45:16,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:16,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-18 15:45:16,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-18 15:45:16,980 INFO L87 Difference]: Start difference. First operand 18 states and 21 transitions. Second operand has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:17,004 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2024-09-18 15:45:17,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-18 15:45:17,004 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-18 15:45:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:17,005 INFO L225 Difference]: With dead ends: 27 [2024-09-18 15:45:17,005 INFO L226 Difference]: Without dead ends: 19 [2024-09-18 15:45:17,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 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 15:45:17,006 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 7 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:17,007 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 7 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2024-09-18 15:45:17,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2024-09-18 15:45:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 13 states have internal predecessors, (16), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:17,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 22 transitions. [2024-09-18 15:45:17,010 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 22 transitions. Word has length 13 [2024-09-18 15:45:17,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:17,010 INFO L474 AbstractCegarLoop]: Abstraction has 19 states and 22 transitions. [2024-09-18 15:45:17,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,011 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 22 transitions. [2024-09-18 15:45:17,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-18 15:45:17,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:17,011 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:17,012 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-18 15:45:17,012 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:17,012 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,012 INFO L85 PathProgramCache]: Analyzing trace with hash -1070032961, now seen corresponding path program 1 times [2024-09-18 15:45:17,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:17,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687356107] [2024-09-18 15:45:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,013 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:17,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,069 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:17,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:45:17,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687356107] [2024-09-18 15:45:17,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687356107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:17,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571159501] [2024-09-18 15:45:17,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,074 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:17,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:17,075 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 15:45:17,077 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 15:45:17,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,110 INFO L262 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-18 15:45:17,117 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:17,154 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:45:17,154 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:17,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-18 15:45:17,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [571159501] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:17,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:17,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2024-09-18 15:45:17,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570352208] [2024-09-18 15:45:17,187 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:17,187 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-18 15:45:17,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-18 15:45:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-18 15:45:17,188 INFO L87 Difference]: Start difference. First operand 19 states and 22 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:17,270 INFO L93 Difference]: Finished difference Result 37 states and 49 transitions. [2024-09-18 15:45:17,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:45:17,270 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-18 15:45:17,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:17,271 INFO L225 Difference]: With dead ends: 37 [2024-09-18 15:45:17,271 INFO L226 Difference]: Without dead ends: 25 [2024-09-18 15:45:17,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2024-09-18 15:45:17,272 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 2 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:17,272 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 49 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:17,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2024-09-18 15:45:17,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2024-09-18 15:45:17,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 19 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:17,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2024-09-18 15:45:17,277 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 14 [2024-09-18 15:45:17,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:17,277 INFO L474 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2024-09-18 15:45:17,277 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,278 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2024-09-18 15:45:17,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-18 15:45:17,278 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:17,278 INFO L216 NwaCegarLoop]: trace histogram [4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:17,290 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 15:45:17,480 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:17,481 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:17,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,481 INFO L85 PathProgramCache]: Analyzing trace with hash -1037717745, now seen corresponding path program 1 times [2024-09-18 15:45:17,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:17,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529349287] [2024-09-18 15:45:17,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,588 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:17,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529349287] [2024-09-18 15:45:17,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529349287] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:17,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561154042] [2024-09-18 15:45:17,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,589 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:17,589 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:17,590 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 15:45:17,592 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 15:45:17,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:17,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-18 15:45:17,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:17,663 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:17,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:17,708 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:17,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561154042] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:17,712 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:17,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-18 15:45:17,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471379281] [2024-09-18 15:45:17,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:17,713 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-18 15:45:17,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:17,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-18 15:45:17,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:45:17,714 INFO L87 Difference]: Start difference. First operand 25 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:17,754 INFO L93 Difference]: Finished difference Result 49 states and 61 transitions. [2024-09-18 15:45:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-18 15:45:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-18 15:45:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:17,756 INFO L225 Difference]: With dead ends: 49 [2024-09-18 15:45:17,756 INFO L226 Difference]: Without dead ends: 33 [2024-09-18 15:45:17,756 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2024-09-18 15:45:17,757 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:17,757 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:17,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-18 15:45:17,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-18 15:45:17,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 27 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:17,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 37 transitions. [2024-09-18 15:45:17,764 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 37 transitions. Word has length 21 [2024-09-18 15:45:17,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:17,764 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 37 transitions. [2024-09-18 15:45:17,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 9 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:17,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,764 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 37 transitions. [2024-09-18 15:45:17,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-18 15:45:17,765 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:17,765 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:17,778 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 15:45:17,967 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:17,967 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:17,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:17,967 INFO L85 PathProgramCache]: Analyzing trace with hash 676738715, now seen corresponding path program 2 times [2024-09-18 15:45:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984324719] [2024-09-18 15:45:17,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:17,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:17,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,090 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:18,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:18,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:18,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984324719] [2024-09-18 15:45:18,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984324719] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:18,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381157487] [2024-09-18 15:45:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:45:18,096 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:18,096 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:18,097 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 15:45:18,099 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 15:45:18,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:45:18,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:18,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-18 15:45:18,145 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:18,190 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:18,190 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:18,282 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:18,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381157487] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:18,282 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:18,283 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-09-18 15:45:18,283 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324675851] [2024-09-18 15:45:18,283 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:18,283 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-18 15:45:18,283 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:18,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-18 15:45:18,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:45:18,284 INFO L87 Difference]: Start difference. First operand 33 states and 37 transitions. Second operand has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:18,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:18,328 INFO L93 Difference]: Finished difference Result 65 states and 81 transitions. [2024-09-18 15:45:18,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-18 15:45:18,329 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-18 15:45:18,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:18,330 INFO L225 Difference]: With dead ends: 65 [2024-09-18 15:45:18,330 INFO L226 Difference]: Without dead ends: 49 [2024-09-18 15:45:18,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-09-18 15:45:18,331 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:18,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-18 15:45:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2024-09-18 15:45:18,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2024-09-18 15:45:18,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 42 states have (on average 1.119047619047619) internal successors, (47), 43 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-18 15:45:18,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2024-09-18 15:45:18,340 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 29 [2024-09-18 15:45:18,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:18,341 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2024-09-18 15:45:18,341 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.4705882352941178) internal successors, (42), 17 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:18,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:18,341 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2024-09-18 15:45:18,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-18 15:45:18,342 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:18,342 INFO L216 NwaCegarLoop]: trace histogram [16, 14, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:18,355 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-18 15:45:18,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-18 15:45:18,545 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:18,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:18,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1101291955, now seen corresponding path program 3 times [2024-09-18 15:45:18,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:18,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565481864] [2024-09-18 15:45:18,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:18,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:18,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:18,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:18,871 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 45 proven. 210 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-18 15:45:18,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565481864] [2024-09-18 15:45:18,873 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565481864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:18,873 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [754700168] [2024-09-18 15:45:18,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:45:18,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:18,873 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:18,874 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 15:45:18,875 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 15:45:18,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-18 15:45:18,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:18,908 INFO L262 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-18 15:45:18,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 256 trivial. 0 not checked. [2024-09-18 15:45:19,002 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:19,175 INFO L134 CoverageAnalysis]: Checked inductivity of 259 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 257 trivial. 0 not checked. [2024-09-18 15:45:19,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [754700168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:19,175 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:19,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7, 6] total 24 [2024-09-18 15:45:19,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168893516] [2024-09-18 15:45:19,175 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:19,175 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-18 15:45:19,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:19,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-18 15:45:19,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-18 15:45:19,177 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:19,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:19,442 INFO L93 Difference]: Finished difference Result 77 states and 90 transitions. [2024-09-18 15:45:19,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-18 15:45:19,446 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-18 15:45:19,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:19,446 INFO L225 Difference]: With dead ends: 77 [2024-09-18 15:45:19,447 INFO L226 Difference]: Without dead ends: 61 [2024-09-18 15:45:19,447 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=442, Invalid=1118, Unknown=0, NotChecked=0, Total=1560 [2024-09-18 15:45:19,448 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 4 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 136 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 136 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:19,448 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 151 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 136 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2024-09-18 15:45:19,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 57. [2024-09-18 15:45:19,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 48 states have (on average 1.125) internal successors, (54), 50 states have internal predecessors, (54), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:45:19,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 62 transitions. [2024-09-18 15:45:19,461 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 62 transitions. Word has length 45 [2024-09-18 15:45:19,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:19,464 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 62 transitions. [2024-09-18 15:45:19,464 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.4166666666666665) internal successors, (58), 23 states have internal predecessors, (58), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:19,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:19,465 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 62 transitions. [2024-09-18 15:45:19,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-18 15:45:19,468 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:19,468 INFO L216 NwaCegarLoop]: trace histogram [17, 15, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:19,481 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 15:45:19,670 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:19,671 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:19,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:19,671 INFO L85 PathProgramCache]: Analyzing trace with hash -897066773, now seen corresponding path program 4 times [2024-09-18 15:45:19,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:19,671 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222823909] [2024-09-18 15:45:19,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:19,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:19,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:19,929 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:19,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:19,933 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222823909] [2024-09-18 15:45:19,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222823909] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:19,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986170015] [2024-09-18 15:45:19,934 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:45:19,934 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:19,934 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:19,936 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 15:45:19,936 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 15:45:19,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:45:19,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:19,987 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-18 15:45:19,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:20,035 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:20,370 INFO L134 CoverageAnalysis]: Checked inductivity of 295 backedges. 48 proven. 240 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:20,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [986170015] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:20,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:20,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 35 [2024-09-18 15:45:20,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894130066] [2024-09-18 15:45:20,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:20,371 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-18 15:45:20,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:20,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-18 15:45:20,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:45:20,373 INFO L87 Difference]: Start difference. First operand 57 states and 62 transitions. Second operand has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:20,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:20,455 INFO L93 Difference]: Finished difference Result 113 states and 140 transitions. [2024-09-18 15:45:20,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-18 15:45:20,455 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2024-09-18 15:45:20,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:20,458 INFO L225 Difference]: With dead ends: 113 [2024-09-18 15:45:20,458 INFO L226 Difference]: Without dead ends: 91 [2024-09-18 15:45:20,458 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2024-09-18 15:45:20,459 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 60 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 88 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:20,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 76 Invalid, 88 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:20,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-18 15:45:20,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-09-18 15:45:20,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 84 states have internal predecessors, (88), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:45:20,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 96 transitions. [2024-09-18 15:45:20,470 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 96 transitions. Word has length 48 [2024-09-18 15:45:20,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:20,480 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 96 transitions. [2024-09-18 15:45:20,480 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2285714285714286) internal successors, (78), 35 states have internal predecessors, (78), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:20,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:20,480 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 96 transitions. [2024-09-18 15:45:20,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2024-09-18 15:45:20,482 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:20,482 INFO L216 NwaCegarLoop]: trace histogram [34, 32, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:20,495 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 15:45:20,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-18 15:45:20,682 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:20,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:20,683 INFO L85 PathProgramCache]: Analyzing trace with hash 827762136, now seen corresponding path program 5 times [2024-09-18 15:45:20,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:20,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69928810] [2024-09-18 15:45:20,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:20,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:21,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:21,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:21,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:21,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:21,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69928810] [2024-09-18 15:45:21,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69928810] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:21,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214626250] [2024-09-18 15:45:21,505 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-18 15:45:21,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:21,505 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:21,506 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 15:45:21,508 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 15:45:21,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2024-09-18 15:45:21,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:21,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-18 15:45:21,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:21,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:21,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:22,771 INFO L134 CoverageAnalysis]: Checked inductivity of 1162 backedges. 99 proven. 1056 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:22,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214626250] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:22,771 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:22,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35, 35] total 69 [2024-09-18 15:45:22,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708334769] [2024-09-18 15:45:22,772 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:22,772 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2024-09-18 15:45:22,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:22,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2024-09-18 15:45:22,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:45:22,776 INFO L87 Difference]: Start difference. First operand 91 states and 96 transitions. Second operand has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:22,923 INFO L93 Difference]: Finished difference Result 181 states and 225 transitions. [2024-09-18 15:45:22,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-18 15:45:22,923 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2024-09-18 15:45:22,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:22,924 INFO L225 Difference]: With dead ends: 181 [2024-09-18 15:45:22,925 INFO L226 Difference]: Without dead ends: 159 [2024-09-18 15:45:22,926 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2024-09-18 15:45:22,926 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:22,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 40 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:22,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-18 15:45:22,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-18 15:45:22,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 150 states have (on average 1.04) internal successors, (156), 152 states have internal predecessors, (156), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:45:22,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 164 transitions. [2024-09-18 15:45:22,944 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 164 transitions. Word has length 82 [2024-09-18 15:45:22,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:22,944 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 164 transitions. [2024-09-18 15:45:22,944 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.1159420289855073) internal successors, (146), 69 states have internal predecessors, (146), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:22,945 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:22,946 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 164 transitions. [2024-09-18 15:45:22,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2024-09-18 15:45:22,950 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:22,951 INFO L216 NwaCegarLoop]: trace histogram [68, 66, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:22,964 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-18 15:45:23,151 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:23,151 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:23,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:23,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1698259470, now seen corresponding path program 6 times [2024-09-18 15:45:23,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:23,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495582183] [2024-09-18 15:45:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:23,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:23,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:25,723 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:25,727 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 201 proven. 4422 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-18 15:45:25,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495582183] [2024-09-18 15:45:25,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [495582183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:25,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60440163] [2024-09-18 15:45:25,728 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-18 15:45:25,728 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:25,728 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:25,729 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 15:45:25,731 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 15:45:25,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-18 15:45:25,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:25,800 INFO L262 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-18 15:45:25,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:26,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 202 proven. 6 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-18 15:45:26,034 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:26,288 INFO L134 CoverageAnalysis]: Checked inductivity of 4630 backedges. 202 proven. 6 refuted. 0 times theorem prover too weak. 4422 trivial. 0 not checked. [2024-09-18 15:45:26,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60440163] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:26,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:26,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 7, 7] total 79 [2024-09-18 15:45:26,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383619830] [2024-09-18 15:45:26,291 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:26,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2024-09-18 15:45:26,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:26,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2024-09-18 15:45:26,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2411, Invalid=3751, Unknown=0, NotChecked=0, Total=6162 [2024-09-18 15:45:26,295 INFO L87 Difference]: Start difference. First operand 159 states and 164 transitions. Second operand has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:27,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:27,813 INFO L93 Difference]: Finished difference Result 195 states and 215 transitions. [2024-09-18 15:45:27,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-18 15:45:27,813 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 150 [2024-09-18 15:45:27,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:27,815 INFO L225 Difference]: With dead ends: 195 [2024-09-18 15:45:27,815 INFO L226 Difference]: Without dead ends: 173 [2024-09-18 15:45:27,820 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 437 GetRequests, 293 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2966 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7570, Invalid=13600, Unknown=0, NotChecked=0, Total=21170 [2024-09-18 15:45:27,820 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:27,821 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 148 Invalid, 233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-18 15:45:27,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-18 15:45:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 167. [2024-09-18 15:45:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 158 states have (on average 1.0379746835443038) internal successors, (164), 160 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:45:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 172 transitions. [2024-09-18 15:45:27,833 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 172 transitions. Word has length 150 [2024-09-18 15:45:27,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:27,836 INFO L474 AbstractCegarLoop]: Abstraction has 167 states and 172 transitions. [2024-09-18 15:45:27,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.1012658227848102) internal successors, (166), 79 states have internal predecessors, (166), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:27,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:27,837 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 172 transitions. [2024-09-18 15:45:27,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2024-09-18 15:45:27,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:27,838 INFO L216 NwaCegarLoop]: trace histogram [69, 67, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:27,849 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-18 15:45:28,038 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:28,039 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:28,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:28,039 INFO L85 PathProgramCache]: Analyzing trace with hash -629009809, now seen corresponding path program 7 times [2024-09-18 15:45:28,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:28,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059900763] [2024-09-18 15:45:28,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:28,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:28,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:30,342 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:30,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:30,346 INFO L134 CoverageAnalysis]: Checked inductivity of 4806 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:30,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059900763] [2024-09-18 15:45:30,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059900763] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:30,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985825650] [2024-09-18 15:45:30,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-18 15:45:30,347 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:30,347 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:30,348 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:30,349 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-18 15:45:30,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:30,439 INFO L262 TraceCheckSpWp]: Trace formula consists of 522 conjuncts, 136 conjuncts are in the unsatisfiable core [2024-09-18 15:45:30,446 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:30,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4806 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:30,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4806 backedges. 204 proven. 4556 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:34,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985825650] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:34,082 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:34,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70, 70] total 139 [2024-09-18 15:45:34,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955789333] [2024-09-18 15:45:34,082 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:34,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2024-09-18 15:45:34,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:34,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2024-09-18 15:45:34,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-18 15:45:34,088 INFO L87 Difference]: Start difference. First operand 167 states and 172 transitions. Second operand has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:45:34,401 INFO L93 Difference]: Finished difference Result 333 states and 412 transitions. [2024-09-18 15:45:34,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2024-09-18 15:45:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2024-09-18 15:45:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:45:34,404 INFO L225 Difference]: With dead ends: 333 [2024-09-18 15:45:34,404 INFO L226 Difference]: Without dead ends: 305 [2024-09-18 15:45:34,405 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=9591, Invalid=9591, Unknown=0, NotChecked=0, Total=19182 [2024-09-18 15:45:34,406 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-18 15:45:34,406 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 136 Invalid, 316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-18 15:45:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2024-09-18 15:45:34,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2024-09-18 15:45:34,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 296 states have (on average 1.0202702702702702) internal successors, (302), 298 states have internal predecessors, (302), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:45:34,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 310 transitions. [2024-09-18 15:45:34,427 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 310 transitions. Word has length 158 [2024-09-18 15:45:34,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:45:34,427 INFO L474 AbstractCegarLoop]: Abstraction has 305 states and 310 transitions. [2024-09-18 15:45:34,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 2.0575539568345325) internal successors, (286), 139 states have internal predecessors, (286), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:45:34,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:34,427 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 310 transitions. [2024-09-18 15:45:34,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 297 [2024-09-18 15:45:34,429 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:45:34,429 INFO L216 NwaCegarLoop]: trace histogram [138, 136, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:45:34,441 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-18 15:45:34,630 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:34,631 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:45:34,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:45:34,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1946243840, now seen corresponding path program 8 times [2024-09-18 15:45:34,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:45:34,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690999922] [2024-09-18 15:45:34,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:45:34,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:45:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:44,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:45:44,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:45:44,666 INFO L134 CoverageAnalysis]: Checked inductivity of 19089 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:44,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:45:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690999922] [2024-09-18 15:45:44,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690999922] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:45:44,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967806311] [2024-09-18 15:45:44,667 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-18 15:45:44,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:45:44,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:45:44,668 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:45:44,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-18 15:45:44,815 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-18 15:45:44,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:45:44,822 INFO L262 TraceCheckSpWp]: Trace formula consists of 936 conjuncts, 274 conjuncts are in the unsatisfiable core [2024-09-18 15:45:44,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:45:45,110 INFO L134 CoverageAnalysis]: Checked inductivity of 19089 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:45,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:45:59,116 INFO L134 CoverageAnalysis]: Checked inductivity of 19089 backedges. 411 proven. 18632 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:45:59,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967806311] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:45:59,116 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:45:59,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [139, 139, 139] total 277 [2024-09-18 15:45:59,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195790098] [2024-09-18 15:45:59,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:45:59,117 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 277 states [2024-09-18 15:45:59,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:45:59,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 277 interpolants. [2024-09-18 15:45:59,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-18 15:45:59,130 INFO L87 Difference]: Start difference. First operand 305 states and 310 transitions. Second operand has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:46:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:46:00,016 INFO L93 Difference]: Finished difference Result 609 states and 757 transitions. [2024-09-18 15:46:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 276 states. [2024-09-18 15:46:00,017 INFO L78 Accepts]: Start accepts. Automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 296 [2024-09-18 15:46:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:46:00,019 INFO L225 Difference]: With dead ends: 609 [2024-09-18 15:46:00,019 INFO L226 Difference]: Without dead ends: 581 [2024-09-18 15:46:00,022 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 732 GetRequests, 457 SyntacticMatches, 0 SemanticMatches, 275 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 18.3s TimeCoverageRelationStatistics Valid=38226, Invalid=38226, Unknown=0, NotChecked=0, Total=76452 [2024-09-18 15:46:00,022 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-18 15:46:00,022 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 100 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-18 15:46:00,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 581 states. [2024-09-18 15:46:00,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 581 to 581. [2024-09-18 15:46:00,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 572 states have (on average 1.0104895104895104) internal successors, (578), 574 states have internal predecessors, (578), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:46:00,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 586 transitions. [2024-09-18 15:46:00,053 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 586 transitions. Word has length 296 [2024-09-18 15:46:00,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:46:00,054 INFO L474 AbstractCegarLoop]: Abstraction has 581 states and 586 transitions. [2024-09-18 15:46:00,054 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 277 states, 277 states have (on average 2.0288808664259927) internal successors, (562), 277 states have internal predecessors, (562), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:46:00,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:46:00,054 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 586 transitions. [2024-09-18 15:46:00,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 573 [2024-09-18 15:46:00,060 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:46:00,060 INFO L216 NwaCegarLoop]: trace histogram [276, 274, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:46:00,076 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-18 15:46:00,261 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-18 15:46:00,261 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:46:00,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:46:00,261 INFO L85 PathProgramCache]: Analyzing trace with hash -1450148254, now seen corresponding path program 9 times [2024-09-18 15:46:00,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:46:00,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072935196] [2024-09-18 15:46:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:46:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:46:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:51,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:46:51,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:46:51,885 INFO L134 CoverageAnalysis]: Checked inductivity of 76221 backedges. 825 proven. 75350 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2024-09-18 15:46:51,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:46:51,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072935196] [2024-09-18 15:46:51,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072935196] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:46:51,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636893500] [2024-09-18 15:46:51,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-18 15:46:51,886 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:46:51,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:46:51,889 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:46:51,890 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-18 15:46:52,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-18 15:46:52,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:46:52,013 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-18 15:46:52,017 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:46:53,194 INFO L134 CoverageAnalysis]: Checked inductivity of 76221 backedges. 826 proven. 45 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2024-09-18 15:46:53,195 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:46:54,396 INFO L134 CoverageAnalysis]: Checked inductivity of 76221 backedges. 826 proven. 45 refuted. 0 times theorem prover too weak. 75350 trivial. 0 not checked. [2024-09-18 15:46:54,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636893500] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:46:54,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:46:54,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [277, 13, 13] total 299 [2024-09-18 15:46:54,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519463266] [2024-09-18 15:46:54,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:46:54,398 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 299 states [2024-09-18 15:46:54,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:46:54,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 299 interpolants. [2024-09-18 15:46:54,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38501, Invalid=50601, Unknown=0, NotChecked=0, Total=89102 [2024-09-18 15:46:54,406 INFO L87 Difference]: Start difference. First operand 581 states and 586 transitions. Second operand has 299 states, 299 states have (on average 1.9866220735785953) internal successors, (594), 299 states have internal predecessors, (594), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:47:17,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:47:17,617 INFO L93 Difference]: Finished difference Result 629 states and 655 transitions. [2024-09-18 15:47:17,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 298 states. [2024-09-18 15:47:17,622 INFO L78 Accepts]: Start accepts. Automaton has has 299 states, 299 states have (on average 1.9866220735785953) internal successors, (594), 299 states have internal predecessors, (594), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 572 [2024-09-18 15:47:17,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:47:17,624 INFO L225 Difference]: With dead ends: 629 [2024-09-18 15:47:17,625 INFO L226 Difference]: Without dead ends: 601 [2024-09-18 15:47:17,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1697 GetRequests, 1125 SyntacticMatches, 0 SemanticMatches, 572 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44054 ImplicationChecksByTransitivity, 40.6s TimeCoverageRelationStatistics Valid=120176, Invalid=208726, Unknown=0, NotChecked=0, Total=328902 [2024-09-18 15:47:17,638 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 3 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-18 15:47:17,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 113 Invalid, 643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 642 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-18 15:47:17,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2024-09-18 15:47:17,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 595. [2024-09-18 15:47:17,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 586 states have (on average 1.0102389078498293) internal successors, (592), 588 states have internal predecessors, (592), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:47:17,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 600 transitions. [2024-09-18 15:47:17,673 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 600 transitions. Word has length 572 [2024-09-18 15:47:17,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:47:17,674 INFO L474 AbstractCegarLoop]: Abstraction has 595 states and 600 transitions. [2024-09-18 15:47:17,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 299 states, 299 states have (on average 1.9866220735785953) internal successors, (594), 299 states have internal predecessors, (594), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:47:17,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,675 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 600 transitions. [2024-09-18 15:47:17,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 587 [2024-09-18 15:47:17,680 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:47:17,681 INFO L216 NwaCegarLoop]: trace histogram [277, 275, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:47:17,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-18 15:47:17,881 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-18 15:47:17,881 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:47:17,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:47:17,882 INFO L85 PathProgramCache]: Analyzing trace with hash -492529089, now seen corresponding path program 10 times [2024-09-18 15:47:17,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:47:17,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038285668] [2024-09-18 15:47:17,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:47:17,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:47:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:11,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-18 15:48:11,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-18 15:48:11,442 INFO L134 CoverageAnalysis]: Checked inductivity of 76960 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 15:48:11,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-18 15:48:11,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038285668] [2024-09-18 15:48:11,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038285668] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-18 15:48:11,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891852678] [2024-09-18 15:48:11,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-18 15:48:11,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-18 15:48:11,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-18 15:48:11,444 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-18 15:48:11,444 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-18 15:48:11,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-18 15:48:11,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-18 15:48:11,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 1854 conjuncts, 552 conjuncts are in the unsatisfiable core [2024-09-18 15:48:11,779 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-18 15:48:12,266 INFO L134 CoverageAnalysis]: Checked inductivity of 76960 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 15:48:12,267 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-18 15:49:09,323 INFO L134 CoverageAnalysis]: Checked inductivity of 76960 backedges. 828 proven. 75900 refuted. 0 times theorem prover too weak. 232 trivial. 0 not checked. [2024-09-18 15:49:09,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891852678] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-18 15:49:09,324 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-18 15:49:09,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [278, 278, 278] total 555 [2024-09-18 15:49:09,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956193463] [2024-09-18 15:49:09,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-18 15:49:09,325 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 555 states [2024-09-18 15:49:09,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-18 15:49:09,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 555 interpolants. [2024-09-18 15:49:09,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-18 15:49:09,351 INFO L87 Difference]: Start difference. First operand 595 states and 600 transitions. Second operand has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:49:17,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-18 15:49:17,240 INFO L93 Difference]: Finished difference Result 1189 states and 1476 transitions. [2024-09-18 15:49:17,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 554 states. [2024-09-18 15:49:17,241 INFO L78 Accepts]: Start accepts. Automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 586 [2024-09-18 15:49:17,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-18 15:49:17,245 INFO L225 Difference]: With dead ends: 1189 [2024-09-18 15:49:17,245 INFO L226 Difference]: Without dead ends: 1149 [2024-09-18 15:49:17,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 1451 GetRequests, 898 SyntacticMatches, 0 SemanticMatches, 553 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1100 ImplicationChecksByTransitivity, 75.1s TimeCoverageRelationStatistics Valid=153735, Invalid=153735, Unknown=0, NotChecked=0, Total=307470 [2024-09-18 15:49:17,255 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 0 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 1139 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-18 15:49:17,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 112 Invalid, 1140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1139 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-18 15:49:17,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1149 states. [2024-09-18 15:49:17,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1149 to 1149. [2024-09-18 15:49:17,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1149 states, 1140 states have (on average 1.0052631578947369) internal successors, (1146), 1142 states have internal predecessors, (1146), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-18 15:49:17,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1149 states to 1149 states and 1154 transitions. [2024-09-18 15:49:17,321 INFO L78 Accepts]: Start accepts. Automaton has 1149 states and 1154 transitions. Word has length 586 [2024-09-18 15:49:17,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-18 15:49:17,321 INFO L474 AbstractCegarLoop]: Abstraction has 1149 states and 1154 transitions. [2024-09-18 15:49:17,322 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 555 states, 555 states have (on average 2.0144144144144143) internal successors, (1118), 555 states have internal predecessors, (1118), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-18 15:49:17,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:17,322 INFO L276 IsEmpty]: Start isEmpty. Operand 1149 states and 1154 transitions. [2024-09-18 15:49:17,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1141 [2024-09-18 15:49:17,329 INFO L208 NwaCegarLoop]: Found error trace [2024-09-18 15:49:17,329 INFO L216 NwaCegarLoop]: trace histogram [554, 552, 21, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-18 15:49:17,346 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-18 15:49:17,529 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-18 15:49:17,530 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-18 15:49:17,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-18 15:49:17,530 INFO L85 PathProgramCache]: Analyzing trace with hash -4390688, now seen corresponding path program 11 times [2024-09-18 15:49:17,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-18 15:49:17,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87867174] [2024-09-18 15:49:17,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-18 15:49:17,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-18 15:49:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat