./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 6908dde5 Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/in-de52.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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-6908dde-m [2024-09-24 23:08:42,828 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-24 23:08:42,897 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-24 23:08:42,901 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-24 23:08:42,902 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-24 23:08:42,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-24 23:08:42,932 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-24 23:08:42,932 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-24 23:08:42,933 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-24 23:08:42,933 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-24 23:08:42,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-24 23:08:42,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-24 23:08:42,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-24 23:08:42,935 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-24 23:08:42,937 INFO L153 SettingsManager]: * Use SBE=true [2024-09-24 23:08:42,937 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-24 23:08:42,937 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-24 23:08:42,937 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-24 23:08:42,937 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-24 23:08:42,938 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-24 23:08:42,938 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-24 23:08:42,941 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-24 23:08:42,942 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-24 23:08:42,942 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-24 23:08:42,942 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-24 23:08:42,942 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-24 23:08:42,942 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-24 23:08:42,942 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:42,943 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-24 23:08:42,943 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-24 23:08:42,944 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-24 23:08:42,945 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-24 23:08:42,945 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-24 23:08:43,129 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-24 23:08:43,154 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-24 23:08:43,157 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-24 23:08:43,158 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-24 23:08:43,158 INFO L274 PluginConnector]: CDTParser initialized [2024-09-24 23:08:43,159 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-24 23:08:44,448 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-24 23:08:44,600 INFO L384 CDTParser]: Found 1 translation units. [2024-09-24 23:08:44,601 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de52.c [2024-09-24 23:08:44,607 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2c5d9449e/f7e9612dac5b47eeb1ede45f15279b73/FLAGbfc45b95a [2024-09-24 23:08:45,023 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2c5d9449e/f7e9612dac5b47eeb1ede45f15279b73 [2024-09-24 23:08:45,025 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-24 23:08:45,027 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-24 23:08:45,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:45,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-24 23:08:45,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-24 23:08:45,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,033 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6340a9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45, skipping insertion in model container [2024-09-24 23:08:45,033 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,047 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-24 23:08:45,191 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/in-de52.c[368,381] [2024-09-24 23:08:45,203 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:45,214 INFO L200 MainTranslator]: Completed pre-run [2024-09-24 23:08:45,224 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/in-de52.c[368,381] [2024-09-24 23:08:45,228 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-24 23:08:45,246 INFO L204 MainTranslator]: Completed translation [2024-09-24 23:08:45,247 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45 WrapperNode [2024-09-24 23:08:45,249 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-24 23:08:45,250 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:45,251 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-24 23:08:45,251 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-24 23:08:45,259 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,267 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,272 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-24 23:08:45,273 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-24 23:08:45,273 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-24 23:08:45,273 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-24 23:08:45,273 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-24 23:08:45,281 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,291 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-09-24 23:08:45,291 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,291 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,293 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,296 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,296 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,297 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,298 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-24 23:08:45,299 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-24 23:08:45,299 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-24 23:08:45,299 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-24 23:08:45,299 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (1/1) ... [2024-09-24 23:08:45,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-24 23:08:45,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:45,332 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-24 23:08:45,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-24 23:08:45,378 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-24 23:08:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-24 23:08:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-24 23:08:45,379 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-24 23:08:45,379 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-24 23:08:45,380 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-24 23:08:45,380 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-24 23:08:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-24 23:08:45,381 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-24 23:08:45,381 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-24 23:08:45,445 INFO L241 CfgBuilder]: Building ICFG [2024-09-24 23:08:45,447 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-24 23:08:45,612 INFO L? ?]: Removed 6 outVars from TransFormulas that were not future-live. [2024-09-24 23:08:45,612 INFO L290 CfgBuilder]: Performing block encoding [2024-09-24 23:08:45,627 INFO L312 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-24 23:08:45,627 INFO L317 CfgBuilder]: Removed 5 assume(true) statements. [2024-09-24 23:08:45,627 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:45 BoogieIcfgContainer [2024-09-24 23:08:45,627 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-24 23:08:45,629 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-24 23:08:45,629 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-24 23:08:45,631 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-24 23:08:45,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.09 11:08:45" (1/3) ... [2024-09-24 23:08:45,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2854d44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:45, skipping insertion in model container [2024-09-24 23:08:45,632 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.09 11:08:45" (2/3) ... [2024-09-24 23:08:45,632 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2854d44b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.09 11:08:45, skipping insertion in model container [2024-09-24 23:08:45,633 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.09 11:08:45" (3/3) ... [2024-09-24 23:08:45,634 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de52.c [2024-09-24 23:08:45,646 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-24 23:08:45,646 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-24 23:08:45,684 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-24 23:08:45,689 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;@79abf149, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-24 23:08:45,690 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-24 23:08:45,693 INFO L276 IsEmpty]: Start isEmpty. Operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-24 23:08:45,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 23:08:45,698 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:45,699 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:45,699 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:45,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:45,704 INFO L85 PathProgramCache]: Analyzing trace with hash -356520028, now seen corresponding path program 1 times [2024-09-24 23:08:45,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:45,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781991057] [2024-09-24 23:08:45,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:45,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:45,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:45,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:45,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:45,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781991057] [2024-09-24 23:08:45,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781991057] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:45,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:45,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-24 23:08:45,865 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872419768] [2024-09-24 23:08:45,866 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:45,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-24 23:08:45,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:45,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-24 23:08:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-24 23:08:45,893 INFO L87 Difference]: Start difference. First operand has 22 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 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) [2024-09-24 23:08:45,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:45,915 INFO L93 Difference]: Finished difference Result 38 states and 57 transitions. [2024-09-24 23:08:45,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-24 23:08:45,917 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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 15 [2024-09-24 23:08:45,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:45,922 INFO L225 Difference]: With dead ends: 38 [2024-09-24 23:08:45,922 INFO L226 Difference]: Without dead ends: 16 [2024-09-24 23:08:45,924 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 [2024-09-24 23:08:45,926 INFO L434 NwaCegarLoop]: 24 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, 24 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 [2024-09-24 23:08:45,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 24 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:45,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2024-09-24 23:08:45,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2024-09-24 23:08:45,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:45,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 20 transitions. [2024-09-24 23:08:45,951 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 20 transitions. Word has length 15 [2024-09-24 23:08:45,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:45,951 INFO L474 AbstractCegarLoop]: Abstraction has 16 states and 20 transitions. [2024-09-24 23:08:45,952 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-24 23:08:45,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 20 transitions. [2024-09-24 23:08:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-24 23:08:45,953 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:45,953 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:45,953 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-24 23:08:45,954 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:45,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:45,954 INFO L85 PathProgramCache]: Analyzing trace with hash 315017388, now seen corresponding path program 1 times [2024-09-24 23:08:45,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:45,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555425753] [2024-09-24 23:08:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:45,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:45,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,169 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:46,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555425753] [2024-09-24 23:08:46,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555425753] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:46,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:46,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-24 23:08:46,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386392884] [2024-09-24 23:08:46,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,183 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:08:46,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:08:46,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:46,185 INFO L87 Difference]: Start difference. First operand 16 states and 20 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-24 23:08:46,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:46,240 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-24 23:08:46,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:08:46,241 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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 15 [2024-09-24 23:08:46,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:46,241 INFO L225 Difference]: With dead ends: 33 [2024-09-24 23:08:46,241 INFO L226 Difference]: Without dead ends: 22 [2024-09-24 23:08:46,242 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:46,243 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 5 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:46,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 48 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:46,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2024-09-24 23:08:46,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2024-09-24 23:08:46,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 29 transitions. [2024-09-24 23:08:46,248 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 29 transitions. Word has length 15 [2024-09-24 23:08:46,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,249 INFO L474 AbstractCegarLoop]: Abstraction has 22 states and 29 transitions. [2024-09-24 23:08:46,249 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (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) [2024-09-24 23:08:46,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,249 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 29 transitions. [2024-09-24 23:08:46,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:46,250 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,250 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,250 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-24 23:08:46,250 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:46,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1680996671, now seen corresponding path program 1 times [2024-09-24 23:08:46,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:46,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813273112] [2024-09-24 23:08:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:46,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,290 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:46,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813273112] [2024-09-24 23:08:46,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813273112] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:46,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:46,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:08:46,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200760728] [2024-09-24 23:08:46,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,291 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:08:46,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:08:46,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:46,292 INFO L87 Difference]: Start difference. First operand 22 states and 29 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-24 23:08:46,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:46,324 INFO L93 Difference]: Finished difference Result 34 states and 46 transitions. [2024-09-24 23:08:46,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:08:46,325 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2024-09-24 23:08:46,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:46,326 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:08:46,326 INFO L226 Difference]: Without dead ends: 27 [2024-09-24 23:08:46,326 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 [2024-09-24 23:08:46,327 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 9 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 9 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:46,327 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 9 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:46,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-24 23:08:46,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-24 23:08:46,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.5) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 37 transitions. [2024-09-24 23:08:46,336 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 37 transitions. Word has length 16 [2024-09-24 23:08:46,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,336 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 37 transitions. [2024-09-24 23:08:46,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-24 23:08:46,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,337 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 37 transitions. [2024-09-24 23:08:46,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-24 23:08:46,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,338 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,338 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-24 23:08:46,338 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:46,338 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,339 INFO L85 PathProgramCache]: Analyzing trace with hash 1211142226, now seen corresponding path program 1 times [2024-09-24 23:08:46,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:46,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203767161] [2024-09-24 23:08:46,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:46,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:46,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203767161] [2024-09-24 23:08:46,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203767161] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:46,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:46,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-24 23:08:46,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1644271201] [2024-09-24 23:08:46,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,379 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-24 23:08:46,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-24 23:08:46,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-24 23:08:46,380 INFO L87 Difference]: Start difference. First operand 27 states and 37 transitions. Second operand has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-24 23:08:46,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:46,398 INFO L93 Difference]: Finished difference Result 40 states and 55 transitions. [2024-09-24 23:08:46,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-24 23:08:46,399 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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 16 [2024-09-24 23:08:46,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:46,399 INFO L225 Difference]: With dead ends: 40 [2024-09-24 23:08:46,399 INFO L226 Difference]: Without dead ends: 31 [2024-09-24 23:08:46,405 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 [2024-09-24 23:08:46,407 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:46,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 29 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:46,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2024-09-24 23:08:46,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2024-09-24 23:08:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 42 transitions. [2024-09-24 23:08:46,426 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 42 transitions. Word has length 16 [2024-09-24 23:08:46,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,427 INFO L474 AbstractCegarLoop]: Abstraction has 31 states and 42 transitions. [2024-09-24 23:08:46,427 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) internal successors, (12), 3 states have internal predecessors, (12), 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) [2024-09-24 23:08:46,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,427 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 42 transitions. [2024-09-24 23:08:46,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-24 23:08:46,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,428 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,428 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-24 23:08:46,428 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:46,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,428 INFO L85 PathProgramCache]: Analyzing trace with hash 1994481964, now seen corresponding path program 1 times [2024-09-24 23:08:46,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:46,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377032270] [2024-09-24 23:08:46,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:46,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:46,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377032270] [2024-09-24 23:08:46,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377032270] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-24 23:08:46,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-24 23:08:46,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-24 23:08:46,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154428110] [2024-09-24 23:08:46,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:46,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:46,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-24 23:08:46,579 INFO L87 Difference]: Start difference. First operand 31 states and 42 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-24 23:08:46,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:46,609 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2024-09-24 23:08:46,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:46,609 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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 17 [2024-09-24 23:08:46,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:46,610 INFO L225 Difference]: With dead ends: 39 [2024-09-24 23:08:46,610 INFO L226 Difference]: Without dead ends: 27 [2024-09-24 23:08:46,610 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:46,611 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 1 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:46,611 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 40 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:46,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-24 23:08:46,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-24 23:08:46,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 36 transitions. [2024-09-24 23:08:46,616 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 36 transitions. Word has length 17 [2024-09-24 23:08:46,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,616 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 36 transitions. [2024-09-24 23:08:46,616 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 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) [2024-09-24 23:08:46,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,617 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 36 transitions. [2024-09-24 23:08:46,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 23:08:46,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,617 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,617 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-24 23:08:46,617 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:46,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1135312256, now seen corresponding path program 1 times [2024-09-24 23:08:46,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:46,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050779276] [2024-09-24 23:08:46,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:46,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:46,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,720 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:46,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:46,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050779276] [2024-09-24 23:08:46,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050779276] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:46,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657518217] [2024-09-24 23:08:46,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:46,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:46,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:46,724 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:46,725 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-24 23:08:46,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:46,770 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:08:46,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:46,802 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:46,802 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:46,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1657518217] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:46,849 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:08:46,849 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5, 5] total 8 [2024-09-24 23:08:46,849 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445410197] [2024-09-24 23:08:46,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:46,850 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:46,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:08:46,851 INFO L87 Difference]: Start difference. First operand 27 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-24 23:08:46,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:46,879 INFO L93 Difference]: Finished difference Result 34 states and 43 transitions. [2024-09-24 23:08:46,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:46,880 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2024-09-24 23:08:46,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:46,880 INFO L225 Difference]: With dead ends: 34 [2024-09-24 23:08:46,880 INFO L226 Difference]: Without dead ends: 24 [2024-09-24 23:08:46,881 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:08:46,882 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 2 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:46,883 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 24 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:46,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-24 23:08:46,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-24 23:08:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:46,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 31 transitions. [2024-09-24 23:08:46,890 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 31 transitions. Word has length 18 [2024-09-24 23:08:46,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:46,891 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 31 transitions. [2024-09-24 23:08:46,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-24 23:08:46,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:46,891 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 31 transitions. [2024-09-24 23:08:46,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-24 23:08:46,892 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:46,892 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:46,904 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:47,096 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-24 23:08:47,097 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:47,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:47,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1896560672, now seen corresponding path program 1 times [2024-09-24 23:08:47,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:47,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287503544] [2024-09-24 23:08:47,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:47,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:47,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,153 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:47,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:47,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287503544] [2024-09-24 23:08:47,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287503544] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:47,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486138478] [2024-09-24 23:08:47,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:47,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:47,160 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:47,162 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:47,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-24 23:08:47,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,202 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:08:47,203 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:47,230 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:47,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:47,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486138478] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:47,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-24 23:08:47,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 5] total 8 [2024-09-24 23:08:47,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790757463] [2024-09-24 23:08:47,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-24 23:08:47,269 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-24 23:08:47,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:47,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-24 23:08:47,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:08:47,270 INFO L87 Difference]: Start difference. First operand 24 states and 31 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-24 23:08:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:47,291 INFO L93 Difference]: Finished difference Result 29 states and 35 transitions. [2024-09-24 23:08:47,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-24 23:08:47,291 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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 18 [2024-09-24 23:08:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:47,292 INFO L225 Difference]: With dead ends: 29 [2024-09-24 23:08:47,293 INFO L226 Difference]: Without dead ends: 21 [2024-09-24 23:08:47,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:08:47,294 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 0 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:47,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 27 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-24 23:08:47,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-24 23:08:47,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:47,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-24 23:08:47,297 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 18 [2024-09-24 23:08:47,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:47,298 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-24 23:08:47,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 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) [2024-09-24 23:08:47,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:47,298 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-24 23:08:47,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:47,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:47,299 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:47,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:47,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-24 23:08:47,504 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:47,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:47,504 INFO L85 PathProgramCache]: Analyzing trace with hash -399434628, now seen corresponding path program 1 times [2024-09-24 23:08:47,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:47,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274100673] [2024-09-24 23:08:47,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:47,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:47,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,604 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:47,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274100673] [2024-09-24 23:08:47,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [274100673] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:47,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242620177] [2024-09-24 23:08:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:47,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:47,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:47,606 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:47,607 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-24 23:08:47,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:47,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-24 23:08:47,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:47,659 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:47,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242620177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:47,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:47,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-24 23:08:47,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668387233] [2024-09-24 23:08:47,768 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:47,768 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-24 23:08:47,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:47,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-24 23:08:47,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:08:47,770 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-24 23:08:48,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:48,037 INFO L93 Difference]: Finished difference Result 77 states and 116 transitions. [2024-09-24 23:08:48,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:08:48,038 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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 19 [2024-09-24 23:08:48,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:48,040 INFO L225 Difference]: With dead ends: 77 [2024-09-24 23:08:48,040 INFO L226 Difference]: Without dead ends: 65 [2024-09-24 23:08:48,041 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2024-09-24 23:08:48,041 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:48,042 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 81 Invalid, 151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:48,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-24 23:08:48,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 32. [2024-09-24 23:08:48,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:48,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 41 transitions. [2024-09-24 23:08:48,055 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 41 transitions. Word has length 19 [2024-09-24 23:08:48,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:48,056 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 41 transitions. [2024-09-24 23:08:48,056 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 11 states have internal predecessors, (31), 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) [2024-09-24 23:08:48,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:48,056 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 41 transitions. [2024-09-24 23:08:48,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-24 23:08:48,057 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:48,057 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:48,070 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-24 23:08:48,257 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-24 23:08:48,259 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:48,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:48,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1802263027, now seen corresponding path program 1 times [2024-09-24 23:08:48,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:48,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861730205] [2024-09-24 23:08:48,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:48,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:48,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,322 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-24 23:08:48,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:48,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861730205] [2024-09-24 23:08:48,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861730205] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:48,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113893131] [2024-09-24 23:08:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:48,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:48,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:48,325 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:48,327 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-24 23:08:48,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,358 INFO L262 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-24 23:08:48,359 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:48,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:48,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:48,410 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:48,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113893131] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:48,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:48,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-24 23:08:48,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146631920] [2024-09-24 23:08:48,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:48,411 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:08:48,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:48,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:08:48,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:48,411 INFO L87 Difference]: Start difference. First operand 32 states and 41 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-09-24 23:08:48,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:48,458 INFO L93 Difference]: Finished difference Result 66 states and 97 transitions. [2024-09-24 23:08:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-24 23:08:48,458 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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 19 [2024-09-24 23:08:48,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:48,459 INFO L225 Difference]: With dead ends: 66 [2024-09-24 23:08:48,459 INFO L226 Difference]: Without dead ends: 54 [2024-09-24 23:08:48,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-24 23:08:48,459 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:48,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 55 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:48,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-24 23:08:48,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 48. [2024-09-24 23:08:48,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.372093023255814) internal successors, (59), 43 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:48,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 63 transitions. [2024-09-24 23:08:48,472 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 63 transitions. Word has length 19 [2024-09-24 23:08:48,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:48,472 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 63 transitions. [2024-09-24 23:08:48,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 6 states have internal predecessors, (24), 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) [2024-09-24 23:08:48,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:48,472 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 63 transitions. [2024-09-24 23:08:48,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-24 23:08:48,473 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:48,473 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:48,485 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:48,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:48,676 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:48,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:48,677 INFO L85 PathProgramCache]: Analyzing trace with hash 537966210, now seen corresponding path program 1 times [2024-09-24 23:08:48,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:48,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829287369] [2024-09-24 23:08:48,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:48,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:48,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:48,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:48,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829287369] [2024-09-24 23:08:48,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829287369] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:48,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1572869759] [2024-09-24 23:08:48,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:48,772 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:48,772 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:48,776 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:48,778 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-24 23:08:48,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:48,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-24 23:08:48,814 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:48,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:48,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:48,929 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:48,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1572869759] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:48,931 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:48,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 10 [2024-09-24 23:08:48,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972019064] [2024-09-24 23:08:48,931 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:48,932 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:08:48,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:48,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:08:48,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:08:48,932 INFO L87 Difference]: Start difference. First operand 48 states and 63 transitions. Second operand has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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) [2024-09-24 23:08:48,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:48,988 INFO L93 Difference]: Finished difference Result 62 states and 81 transitions. [2024-09-24 23:08:48,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:08:48,989 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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 20 [2024-09-24 23:08:48,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:48,989 INFO L225 Difference]: With dead ends: 62 [2024-09-24 23:08:48,991 INFO L226 Difference]: Without dead ends: 47 [2024-09-24 23:08:48,992 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-24 23:08:48,992 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 3 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:48,992 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 84 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:48,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-24 23:08:49,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 44. [2024-09-24 23:08:49,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.4871794871794872) internal successors, (58), 39 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:49,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 62 transitions. [2024-09-24 23:08:49,008 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 62 transitions. Word has length 20 [2024-09-24 23:08:49,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:49,008 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 62 transitions. [2024-09-24 23:08:49,008 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.1) internal successors, (31), 8 states have internal predecessors, (31), 3 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) [2024-09-24 23:08:49,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:49,008 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 62 transitions. [2024-09-24 23:08:49,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-24 23:08:49,009 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:49,009 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:49,022 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:49,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-24 23:08:49,214 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:49,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:49,215 INFO L85 PathProgramCache]: Analyzing trace with hash 548739116, now seen corresponding path program 2 times [2024-09-24 23:08:49,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:49,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563781509] [2024-09-24 23:08:49,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:49,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:49,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:49,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:49,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:49,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:49,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563781509] [2024-09-24 23:08:49,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563781509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:49,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712290159] [2024-09-24 23:08:49,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:49,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:49,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:49,293 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:49,295 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-24 23:08:49,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:49,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:49,328 INFO L262 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:49,328 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:49,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:49,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:49,422 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:49,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712290159] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:49,423 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:49,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-24 23:08:49,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144025616] [2024-09-24 23:08:49,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:49,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-24 23:08:49,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:49,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-24 23:08:49,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-24 23:08:49,425 INFO L87 Difference]: Start difference. First operand 44 states and 62 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-09-24 23:08:49,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:49,552 INFO L93 Difference]: Finished difference Result 96 states and 141 transitions. [2024-09-24 23:08:49,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-24 23:08:49,552 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 [2024-09-24 23:08:49,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:49,553 INFO L225 Difference]: With dead ends: 96 [2024-09-24 23:08:49,553 INFO L226 Difference]: Without dead ends: 68 [2024-09-24 23:08:49,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:49,554 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 24 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 153 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 103 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 153 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:49,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 103 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 153 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:49,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-24 23:08:49,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 54. [2024-09-24 23:08:49,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 49 states have (on average 1.4081632653061225) internal successors, (69), 49 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:49,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-24 23:08:49,567 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 21 [2024-09-24 23:08:49,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:49,567 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-24 23:08:49,567 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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) [2024-09-24 23:08:49,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:49,568 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-24 23:08:49,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-24 23:08:49,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:49,568 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:49,584 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-24 23:08:49,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-24 23:08:49,773 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:49,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:49,773 INFO L85 PathProgramCache]: Analyzing trace with hash -1383500575, now seen corresponding path program 3 times [2024-09-24 23:08:49,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:49,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205279591] [2024-09-24 23:08:49,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:49,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:49,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:49,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:49,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:49,866 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:49,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:49,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205279591] [2024-09-24 23:08:49,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205279591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:49,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794869050] [2024-09-24 23:08:49,866 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:49,866 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:49,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:49,868 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:49,869 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-24 23:08:49,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-24 23:08:49,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:49,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-24 23:08:49,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:49,953 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:49,953 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:50,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:50,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794869050] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:50,012 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:50,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-24 23:08:50,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [637746612] [2024-09-24 23:08:50,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:50,013 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-24 23:08:50,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:50,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-24 23:08:50,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-24 23:08:50,014 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-24 23:08:50,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:50,302 INFO L93 Difference]: Finished difference Result 84 states and 120 transitions. [2024-09-24 23:08:50,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-24 23:08:50,303 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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 22 [2024-09-24 23:08:50,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:50,303 INFO L225 Difference]: With dead ends: 84 [2024-09-24 23:08:50,303 INFO L226 Difference]: Without dead ends: 67 [2024-09-24 23:08:50,304 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=639, Unknown=0, NotChecked=0, Total=756 [2024-09-24 23:08:50,304 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 19 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:50,304 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 119 Invalid, 254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:08:50,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2024-09-24 23:08:50,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 62. [2024-09-24 23:08:50,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 57 states have (on average 1.368421052631579) internal successors, (78), 57 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:50,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-24 23:08:50,318 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 22 [2024-09-24 23:08:50,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:50,318 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-24 23:08:50,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 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) [2024-09-24 23:08:50,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:50,319 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-24 23:08:50,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-24 23:08:50,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:50,319 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:50,333 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-24 23:08:50,523 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:50,524 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:50,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:50,525 INFO L85 PathProgramCache]: Analyzing trace with hash 1003223996, now seen corresponding path program 2 times [2024-09-24 23:08:50,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:50,525 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843367578] [2024-09-24 23:08:50,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:50,525 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:50,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:50,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:08:50,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:50,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843367578] [2024-09-24 23:08:50,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843367578] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:50,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874290315] [2024-09-24 23:08:50,597 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:08:50,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:50,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:50,599 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:50,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-24 23:08:50,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:08:50,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:50,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:08:50,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:50,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:50,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:50,880 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:08:50,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874290315] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:50,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:50,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 10] total 21 [2024-09-24 23:08:50,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527350257] [2024-09-24 23:08:50,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:50,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:08:50,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:50,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:08:50,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=333, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:50,882 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:51,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:51,525 INFO L93 Difference]: Finished difference Result 147 states and 208 transitions. [2024-09-24 23:08:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-24 23:08:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2024-09-24 23:08:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:51,526 INFO L225 Difference]: With dead ends: 147 [2024-09-24 23:08:51,526 INFO L226 Difference]: Without dead ends: 108 [2024-09-24 23:08:51,527 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=290, Invalid=1350, Unknown=0, NotChecked=0, Total=1640 [2024-09-24 23:08:51,528 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 488 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:51,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 252 Invalid, 488 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:51,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-24 23:08:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 89. [2024-09-24 23:08:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 84 states have (on average 1.369047619047619) internal successors, (115), 84 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:51,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 119 transitions. [2024-09-24 23:08:51,552 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 119 transitions. Word has length 23 [2024-09-24 23:08:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:51,553 INFO L474 AbstractCegarLoop]: Abstraction has 89 states and 119 transitions. [2024-09-24 23:08:51,553 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.15) internal successors, (43), 20 states have internal predecessors, (43), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:51,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:51,553 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 119 transitions. [2024-09-24 23:08:51,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:08:51,554 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:51,554 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:51,573 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-24 23:08:51,758 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:51,759 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:51,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:51,759 INFO L85 PathProgramCache]: Analyzing trace with hash 411216348, now seen corresponding path program 4 times [2024-09-24 23:08:51,760 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:51,760 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352175036] [2024-09-24 23:08:51,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:51,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:51,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:51,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:51,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:51,904 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:51,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352175036] [2024-09-24 23:08:51,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352175036] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:51,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524011491] [2024-09-24 23:08:51,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:51,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:51,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:51,907 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) [2024-09-24 23:08:51,908 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-24 23:08:51,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:51,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:51,943 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 23:08:51,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:52,017 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:08:52,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:52,111 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:08:52,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524011491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:52,111 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:52,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-24 23:08:52,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310404820] [2024-09-24 23:08:52,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:52,112 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-24 23:08:52,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:52,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-24 23:08:52,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-24 23:08:52,113 INFO L87 Difference]: Start difference. First operand 89 states and 119 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2024-09-24 23:08:52,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:52,811 INFO L93 Difference]: Finished difference Result 123 states and 172 transitions. [2024-09-24 23:08:52,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2024-09-24 23:08:52,812 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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 25 [2024-09-24 23:08:52,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:52,812 INFO L225 Difference]: With dead ends: 123 [2024-09-24 23:08:52,812 INFO L226 Difference]: Without dead ends: 96 [2024-09-24 23:08:52,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 738 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=292, Invalid=2570, Unknown=0, NotChecked=0, Total=2862 [2024-09-24 23:08:52,815 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 55 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 503 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 553 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 503 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:52,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 139 Invalid, 553 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 503 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:52,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2024-09-24 23:08:52,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 78. [2024-09-24 23:08:52,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 73 states have (on average 1.3287671232876712) internal successors, (97), 73 states have internal predecessors, (97), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:52,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 101 transitions. [2024-09-24 23:08:52,831 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 101 transitions. Word has length 25 [2024-09-24 23:08:52,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:52,831 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 101 transitions. [2024-09-24 23:08:52,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 states have internal predecessors, (36), 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) [2024-09-24 23:08:52,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:52,832 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 101 transitions. [2024-09-24 23:08:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-24 23:08:52,832 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:52,832 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:52,845 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-24 23:08:53,036 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-24 23:08:53,037 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:53,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:53,037 INFO L85 PathProgramCache]: Analyzing trace with hash 1940516302, now seen corresponding path program 3 times [2024-09-24 23:08:53,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:53,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92956381] [2024-09-24 23:08:53,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:53,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:53,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:53,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:53,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-24 23:08:53,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92956381] [2024-09-24 23:08:53,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [92956381] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:53,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2135998765] [2024-09-24 23:08:53,113 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:08:53,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:53,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:53,118 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) [2024-09-24 23:08:53,120 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-24 23:08:53,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:08:53,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:53,156 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-24 23:08:53,156 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:53,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:53,390 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-24 23:08:53,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2135998765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:53,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:53,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13, 11] total 24 [2024-09-24 23:08:53,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195297585] [2024-09-24 23:08:53,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:53,391 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:08:53,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:53,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:08:53,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:08:53,392 INFO L87 Difference]: Start difference. First operand 78 states and 101 transitions. Second operand has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:54,224 INFO L93 Difference]: Finished difference Result 171 states and 236 transitions. [2024-09-24 23:08:54,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-24 23:08:54,225 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-24 23:08:54,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:54,226 INFO L225 Difference]: With dead ends: 171 [2024-09-24 23:08:54,226 INFO L226 Difference]: Without dead ends: 134 [2024-09-24 23:08:54,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 776 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=432, Invalid=2538, Unknown=0, NotChecked=0, Total=2970 [2024-09-24 23:08:54,227 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 68 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 125 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 125 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:54,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 246 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [125 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:54,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-09-24 23:08:54,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 101. [2024-09-24 23:08:54,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 96 states have (on average 1.3645833333333333) internal successors, (131), 96 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 135 transitions. [2024-09-24 23:08:54,255 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 135 transitions. Word has length 25 [2024-09-24 23:08:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:54,255 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 135 transitions. [2024-09-24 23:08:54,255 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.0) internal successors, (46), 23 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 135 transitions. [2024-09-24 23:08:54,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:08:54,256 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:54,256 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:54,275 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-24 23:08:54,456 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-24 23:08:54,457 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:54,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,458 INFO L85 PathProgramCache]: Analyzing trace with hash 712565185, now seen corresponding path program 4 times [2024-09-24 23:08:54,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:54,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739231712] [2024-09-24 23:08:54,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:54,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:54,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:54,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:54,575 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:54,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:54,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739231712] [2024-09-24 23:08:54,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739231712] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:54,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706905490] [2024-09-24 23:08:54,576 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:08:54,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:54,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:54,581 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) [2024-09-24 23:08:54,582 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-24 23:08:54,620 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:08:54,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:54,621 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:54,622 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:54,649 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:54,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-24 23:08:54,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706905490] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:54,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:54,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-24 23:08:54,698 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463585182] [2024-09-24 23:08:54,698 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:54,699 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-24 23:08:54,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:54,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-24 23:08:54,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:54,699 INFO L87 Difference]: Start difference. First operand 101 states and 135 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-09-24 23:08:54,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:54,746 INFO L93 Difference]: Finished difference Result 125 states and 166 transitions. [2024-09-24 23:08:54,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-24 23:08:54,746 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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 26 [2024-09-24 23:08:54,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:54,748 INFO L225 Difference]: With dead ends: 125 [2024-09-24 23:08:54,748 INFO L226 Difference]: Without dead ends: 99 [2024-09-24 23:08:54,748 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 53 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-24 23:08:54,749 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 3 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:54,749 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 62 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:54,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-24 23:08:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2024-09-24 23:08:54,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 94 states have (on average 1.372340425531915) internal successors, (129), 94 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:54,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 133 transitions. [2024-09-24 23:08:54,767 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 133 transitions. Word has length 26 [2024-09-24 23:08:54,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:54,768 INFO L474 AbstractCegarLoop]: Abstraction has 99 states and 133 transitions. [2024-09-24 23:08:54,768 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 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) [2024-09-24 23:08:54,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,768 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 133 transitions. [2024-09-24 23:08:54,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-24 23:08:54,769 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:54,769 INFO L216 NwaCegarLoop]: trace histogram [5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:54,782 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-24 23:08:54,973 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-24 23:08:54,974 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:54,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:54,974 INFO L85 PathProgramCache]: Analyzing trace with hash -133051136, now seen corresponding path program 5 times [2024-09-24 23:08:54,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:54,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353893756] [2024-09-24 23:08:54,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:54,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:55,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:55,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:55,112 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-24 23:08:55,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:55,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353893756] [2024-09-24 23:08:55,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353893756] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:55,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349948371] [2024-09-24 23:08:55,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:55,113 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:55,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:55,117 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:55,119 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-24 23:08:55,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-24 23:08:55,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:55,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-24 23:08:55,158 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:55,217 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-24 23:08:55,217 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:55,318 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-24 23:08:55,318 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349948371] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:55,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:55,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 6] total 17 [2024-09-24 23:08:55,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520895863] [2024-09-24 23:08:55,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:55,319 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-24 23:08:55,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:55,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-24 23:08:55,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2024-09-24 23:08:55,319 INFO L87 Difference]: Start difference. First operand 99 states and 133 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2024-09-24 23:08:55,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:55,584 INFO L93 Difference]: Finished difference Result 216 states and 305 transitions. [2024-09-24 23:08:55,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-24 23:08:55,585 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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 26 [2024-09-24 23:08:55,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:55,586 INFO L225 Difference]: With dead ends: 216 [2024-09-24 23:08:55,586 INFO L226 Difference]: Without dead ends: 173 [2024-09-24 23:08:55,586 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=341, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:08:55,587 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 46 mSDsluCounter, 233 mSDsCounter, 0 mSdLazyCounter, 272 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 268 SdHoareTripleChecker+Invalid, 307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 272 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:55,587 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 268 Invalid, 307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 272 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-24 23:08:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2024-09-24 23:08:55,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 113. [2024-09-24 23:08:55,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.3055555555555556) internal successors, (141), 108 states have internal predecessors, (141), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:55,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 145 transitions. [2024-09-24 23:08:55,608 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 145 transitions. Word has length 26 [2024-09-24 23:08:55,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:55,608 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 145 transitions. [2024-09-24 23:08:55,608 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 17 states have internal predecessors, (36), 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) [2024-09-24 23:08:55,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:55,609 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 145 transitions. [2024-09-24 23:08:55,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-24 23:08:55,609 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:55,609 INFO L216 NwaCegarLoop]: trace histogram [6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:55,625 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-24 23:08:55,810 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-24 23:08:55,811 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:55,811 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:55,811 INFO L85 PathProgramCache]: Analyzing trace with hash 1263484460, now seen corresponding path program 5 times [2024-09-24 23:08:55,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:55,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814718055] [2024-09-24 23:08:55,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:55,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:55,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:55,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:55,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:55,932 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-24 23:08:55,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814718055] [2024-09-24 23:08:55,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814718055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:55,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227702539] [2024-09-24 23:08:55,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:08:55,932 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:55,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:55,935 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:55,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-24 23:08:55,981 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-24 23:08:55,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:55,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-24 23:08:55,983 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:56,084 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:08:56,085 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:56,161 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2024-09-24 23:08:56,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1227702539] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:56,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:56,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 16, 5] total 21 [2024-09-24 23:08:56,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621798042] [2024-09-24 23:08:56,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:56,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:08:56,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:56,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:08:56,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:08:56,163 INFO L87 Difference]: Start difference. First operand 113 states and 145 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2024-09-24 23:08:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:56,865 INFO L93 Difference]: Finished difference Result 229 states and 321 transitions. [2024-09-24 23:08:56,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-24 23:08:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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 27 [2024-09-24 23:08:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:56,866 INFO L225 Difference]: With dead ends: 229 [2024-09-24 23:08:56,866 INFO L226 Difference]: Without dead ends: 204 [2024-09-24 23:08:56,867 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=319, Invalid=2131, Unknown=0, NotChecked=0, Total=2450 [2024-09-24 23:08:56,867 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 44 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 821 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 884 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:56,867 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 319 Invalid, 884 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 821 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:08:56,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2024-09-24 23:08:56,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 133. [2024-09-24 23:08:56,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.3203125) internal successors, (169), 128 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:56,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 173 transitions. [2024-09-24 23:08:56,909 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 173 transitions. Word has length 27 [2024-09-24 23:08:56,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:56,909 INFO L474 AbstractCegarLoop]: Abstraction has 133 states and 173 transitions. [2024-09-24 23:08:56,909 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 21 states have internal predecessors, (45), 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) [2024-09-24 23:08:56,909 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:56,909 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 173 transitions. [2024-09-24 23:08:56,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-24 23:08:56,910 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:56,910 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:56,922 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-24 23:08:57,114 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-24 23:08:57,115 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:57,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:57,115 INFO L85 PathProgramCache]: Analyzing trace with hash -695293183, now seen corresponding path program 6 times [2024-09-24 23:08:57,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:57,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805736242] [2024-09-24 23:08:57,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:57,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:57,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:57,249 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:57,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:08:57,251 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805736242] [2024-09-24 23:08:57,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805736242] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:57,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803538648] [2024-09-24 23:08:57,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:57,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:57,253 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:57,254 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-24 23:08:57,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-24 23:08:57,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:57,292 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 23:08:57,292 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:57,379 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-24 23:08:57,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-24 23:08:57,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [803538648] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:57,498 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:57,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-24 23:08:57,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080291804] [2024-09-24 23:08:57,499 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:57,499 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:08:57,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:08:57,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:08:57,500 INFO L87 Difference]: Start difference. First operand 133 states and 173 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2024-09-24 23:08:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:58,662 INFO L93 Difference]: Finished difference Result 200 states and 273 transitions. [2024-09-24 23:08:58,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-24 23:08:58,662 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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 28 [2024-09-24 23:08:58,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:58,663 INFO L225 Difference]: With dead ends: 200 [2024-09-24 23:08:58,663 INFO L226 Difference]: Without dead ends: 170 [2024-09-24 23:08:58,665 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=440, Invalid=4962, Unknown=0, NotChecked=0, Total=5402 [2024-09-24 23:08:58,665 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 79 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:58,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [79 Valid, 168 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:08:58,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2024-09-24 23:08:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 147. [2024-09-24 23:08:58,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3028169014084507) internal successors, (185), 142 states have internal predecessors, (185), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 189 transitions. [2024-09-24 23:08:58,692 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 189 transitions. Word has length 28 [2024-09-24 23:08:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:58,692 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 189 transitions. [2024-09-24 23:08:58,693 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 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) [2024-09-24 23:08:58,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 189 transitions. [2024-09-24 23:08:58,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-24 23:08:58,693 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:58,693 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:58,705 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-24 23:08:58,897 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:58,897 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:58,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:58,898 INFO L85 PathProgramCache]: Analyzing trace with hash 2037353101, now seen corresponding path program 6 times [2024-09-24 23:08:58,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:58,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247733294] [2024-09-24 23:08:58,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:58,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:59,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:59,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:59,007 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:08:59,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247733294] [2024-09-24 23:08:59,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247733294] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:59,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855027506] [2024-09-24 23:08:59,007 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:08:59,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:59,007 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:59,009 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:59,010 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-24 23:08:59,046 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-24 23:08:59,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:08:59,047 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:08:59,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:08:59,082 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:59,128 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:08:59,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1855027506] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:59,128 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:59,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-24 23:08:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138396658] [2024-09-24 23:08:59,128 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:59,129 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:08:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:59,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:08:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:08:59,129 INFO L87 Difference]: Start difference. First operand 147 states and 189 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-24 23:08:59,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:08:59,216 INFO L93 Difference]: Finished difference Result 165 states and 211 transitions. [2024-09-24 23:08:59,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:08:59,217 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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 29 [2024-09-24 23:08:59,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:08:59,217 INFO L225 Difference]: With dead ends: 165 [2024-09-24 23:08:59,217 INFO L226 Difference]: Without dead ends: 151 [2024-09-24 23:08:59,218 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 55 SyntacticMatches, 8 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:08:59,218 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 8 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:08:59,218 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 84 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:08:59,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-09-24 23:08:59,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 151. [2024-09-24 23:08:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.2876712328767124) internal successors, (188), 146 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:08:59,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 192 transitions. [2024-09-24 23:08:59,248 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 192 transitions. Word has length 29 [2024-09-24 23:08:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:08:59,248 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 192 transitions. [2024-09-24 23:08:59,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) internal successors, (20), 6 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) [2024-09-24 23:08:59,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:59,249 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 192 transitions. [2024-09-24 23:08:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-24 23:08:59,249 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:08:59,249 INFO L216 NwaCegarLoop]: trace histogram [7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:08:59,262 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-24 23:08:59,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:59,454 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:08:59,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:08:59,454 INFO L85 PathProgramCache]: Analyzing trace with hash 947704670, now seen corresponding path program 7 times [2024-09-24 23:08:59,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:08:59,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176951521] [2024-09-24 23:08:59,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:08:59,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:08:59,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:59,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:08:59,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-24 23:08:59,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:08:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176951521] [2024-09-24 23:08:59,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176951521] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:08:59,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297321922] [2024-09-24 23:08:59,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:08:59,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:08:59,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:08:59,597 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:08:59,599 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-24 23:08:59,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:08:59,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-24 23:08:59,640 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:08:59,742 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-24 23:08:59,742 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:08:59,869 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:08:59,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [297321922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:08:59,870 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:08:59,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16, 8] total 23 [2024-09-24 23:08:59,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614397214] [2024-09-24 23:08:59,870 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:08:59,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-24 23:08:59,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:08:59,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-24 23:08:59,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2024-09-24 23:08:59,871 INFO L87 Difference]: Start difference. First operand 151 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2024-09-24 23:09:01,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:01,028 INFO L93 Difference]: Finished difference Result 302 states and 406 transitions. [2024-09-24 23:09:01,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-24 23:09:01,028 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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 [2024-09-24 23:09:01,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:01,029 INFO L225 Difference]: With dead ends: 302 [2024-09-24 23:09:01,029 INFO L226 Difference]: Without dead ends: 254 [2024-09-24 23:09:01,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1117 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=564, Invalid=3596, Unknown=0, NotChecked=0, Total=4160 [2024-09-24 23:09:01,031 INFO L434 NwaCegarLoop]: 41 mSDtfsCounter, 59 mSDsluCounter, 440 mSDsCounter, 0 mSdLazyCounter, 1025 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 1147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 1025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:01,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [59 Valid, 481 Invalid, 1147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 1025 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:09:01,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2024-09-24 23:09:01,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 155. [2024-09-24 23:09:01,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.2866666666666666) internal successors, (193), 150 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:01,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 197 transitions. [2024-09-24 23:09:01,066 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 197 transitions. Word has length 29 [2024-09-24 23:09:01,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:01,067 INFO L474 AbstractCegarLoop]: Abstraction has 155 states and 197 transitions. [2024-09-24 23:09:01,067 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 states have internal predecessors, (48), 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) [2024-09-24 23:09:01,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:01,067 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 197 transitions. [2024-09-24 23:09:01,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-24 23:09:01,068 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:01,068 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:01,082 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:01,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:01,272 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:01,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:01,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1065772992, now seen corresponding path program 2 times [2024-09-24 23:09:01,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:01,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903878673] [2024-09-24 23:09:01,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:01,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:01,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:01,412 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:01,414 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:09:01,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903878673] [2024-09-24 23:09:01,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903878673] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:01,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1751489496] [2024-09-24 23:09:01,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:01,414 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:01,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:01,416 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:01,418 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-24 23:09:01,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:01,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:01,458 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-24 23:09:01,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:01,581 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 23:09:01,581 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2024-09-24 23:09:01,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1751489496] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:01,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:01,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-24 23:09:01,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478200249] [2024-09-24 23:09:01,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:01,735 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:09:01,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:01,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:09:01,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:09:01,735 INFO L87 Difference]: Start difference. First operand 155 states and 197 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2024-09-24 23:09:02,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:02,740 INFO L93 Difference]: Finished difference Result 231 states and 297 transitions. [2024-09-24 23:09:02,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-24 23:09:02,740 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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 30 [2024-09-24 23:09:02,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:02,742 INFO L225 Difference]: With dead ends: 231 [2024-09-24 23:09:02,742 INFO L226 Difference]: Without dead ends: 197 [2024-09-24 23:09:02,742 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 57 SyntacticMatches, 8 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 611 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=338, Invalid=2418, Unknown=0, NotChecked=0, Total=2756 [2024-09-24 23:09:02,743 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 83 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 613 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 688 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 613 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:02,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 322 Invalid, 688 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 613 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-24 23:09:02,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-24 23:09:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 149. [2024-09-24 23:09:02,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 144 states have (on average 1.2638888888888888) internal successors, (182), 144 states have internal predecessors, (182), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:02,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 186 transitions. [2024-09-24 23:09:02,783 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 186 transitions. Word has length 30 [2024-09-24 23:09:02,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:02,783 INFO L474 AbstractCegarLoop]: Abstraction has 149 states and 186 transitions. [2024-09-24 23:09:02,783 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 18 states have internal predecessors, (38), 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) [2024-09-24 23:09:02,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:02,783 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 186 transitions. [2024-09-24 23:09:02,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-24 23:09:02,784 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:02,784 INFO L216 NwaCegarLoop]: trace histogram [8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:02,799 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:02,987 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:02,988 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:02,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:02,988 INFO L85 PathProgramCache]: Analyzing trace with hash -850750864, now seen corresponding path program 8 times [2024-09-24 23:09:02,988 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:02,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340955991] [2024-09-24 23:09:02,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:02,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:03,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:03,134 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:09:03,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:03,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340955991] [2024-09-24 23:09:03,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340955991] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:03,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1306126269] [2024-09-24 23:09:03,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:03,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:03,135 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:03,136 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:03,137 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-24 23:09:03,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:03,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:03,181 INFO L262 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 48 conjuncts are in the unsatisfiable core [2024-09-24 23:09:03,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:03,298 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:03,299 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:09:03,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1306126269] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:03,535 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:03,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 18, 12] total 30 [2024-09-24 23:09:03,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74785014] [2024-09-24 23:09:03,536 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:03,536 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:09:03,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:03,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:09:03,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:09:03,537 INFO L87 Difference]: Start difference. First operand 149 states and 186 transitions. Second operand has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:05,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:05,666 INFO L93 Difference]: Finished difference Result 324 states and 427 transitions. [2024-09-24 23:09:05,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2024-09-24 23:09:05,667 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-24 23:09:05,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:05,668 INFO L225 Difference]: With dead ends: 324 [2024-09-24 23:09:05,668 INFO L226 Difference]: Without dead ends: 249 [2024-09-24 23:09:05,670 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=748, Invalid=6392, Unknown=0, NotChecked=0, Total=7140 [2024-09-24 23:09:05,671 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 91 mSDsluCounter, 549 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 244 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:05,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 596 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [244 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-24 23:09:05,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2024-09-24 23:09:05,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 171. [2024-09-24 23:09:05,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.3253012048192772) internal successors, (220), 166 states have internal predecessors, (220), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:05,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 224 transitions. [2024-09-24 23:09:05,721 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 224 transitions. Word has length 30 [2024-09-24 23:09:05,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:05,721 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 224 transitions. [2024-09-24 23:09:05,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:05,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 224 transitions. [2024-09-24 23:09:05,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:09:05,722 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:05,722 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:05,735 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-24 23:09:05,922 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-24 23:09:05,923 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:05,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:05,923 INFO L85 PathProgramCache]: Analyzing trace with hash 1118269741, now seen corresponding path program 9 times [2024-09-24 23:09:05,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:05,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781660201] [2024-09-24 23:09:05,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:05,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:05,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:06,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,018 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:09:06,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781660201] [2024-09-24 23:09:06,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781660201] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:06,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [739164409] [2024-09-24 23:09:06,018 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:06,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:06,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:06,020 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:06,024 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-24 23:09:06,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-24 23:09:06,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:06,063 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-24 23:09:06,064 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:06,093 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:09:06,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:09:06,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [739164409] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:06,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:06,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-24 23:09:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232705546] [2024-09-24 23:09:06,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:06,135 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-24 23:09:06,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-24 23:09:06,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:09:06,136 INFO L87 Difference]: Start difference. First operand 171 states and 224 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-24 23:09:06,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:06,200 INFO L93 Difference]: Finished difference Result 187 states and 244 transitions. [2024-09-24 23:09:06,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-24 23:09:06,201 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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 31 [2024-09-24 23:09:06,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:06,202 INFO L225 Difference]: With dead ends: 187 [2024-09-24 23:09:06,202 INFO L226 Difference]: Without dead ends: 159 [2024-09-24 23:09:06,202 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-24 23:09:06,202 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 6 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:06,203 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 90 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-24 23:09:06,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-09-24 23:09:06,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 159. [2024-09-24 23:09:06,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.3376623376623376) internal successors, (206), 154 states have internal predecessors, (206), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:06,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 210 transitions. [2024-09-24 23:09:06,248 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 210 transitions. Word has length 31 [2024-09-24 23:09:06,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:06,248 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 210 transitions. [2024-09-24 23:09:06,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 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) [2024-09-24 23:09:06,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:06,248 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 210 transitions. [2024-09-24 23:09:06,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-24 23:09:06,249 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:06,249 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:06,261 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-24 23:09:06,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-24 23:09:06,452 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:06,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:06,453 INFO L85 PathProgramCache]: Analyzing trace with hash -502026436, now seen corresponding path program 7 times [2024-09-24 23:09:06,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:06,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830839340] [2024-09-24 23:09:06,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:06,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:06,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,616 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:06,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,618 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-24 23:09:06,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830839340] [2024-09-24 23:09:06,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830839340] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:06,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682346243] [2024-09-24 23:09:06,619 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:09:06,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:06,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:06,621 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:06,629 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-24 23:09:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:06,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-24 23:09:06,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:06,764 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:09:06,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:06,912 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:09:06,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682346243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:06,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:06,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 27 [2024-09-24 23:09:06,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777639224] [2024-09-24 23:09:06,913 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:06,913 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-24 23:09:06,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:06,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-24 23:09:06,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2024-09-24 23:09:06,914 INFO L87 Difference]: Start difference. First operand 159 states and 210 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2024-09-24 23:09:08,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:08,194 INFO L93 Difference]: Finished difference Result 537 states and 812 transitions. [2024-09-24 23:09:08,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-24 23:09:08,194 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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 31 [2024-09-24 23:09:08,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:08,197 INFO L225 Difference]: With dead ends: 537 [2024-09-24 23:09:08,197 INFO L226 Difference]: Without dead ends: 485 [2024-09-24 23:09:08,198 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 953 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=967, Invalid=3863, Unknown=0, NotChecked=0, Total=4830 [2024-09-24 23:09:08,198 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 144 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 1183 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 405 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 1183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:08,198 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 405 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 1183 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:09:08,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 485 states. [2024-09-24 23:09:08,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 485 to 235. [2024-09-24 23:09:08,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.4086956521739131) internal successors, (324), 230 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:08,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 328 transitions. [2024-09-24 23:09:08,270 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 328 transitions. Word has length 31 [2024-09-24 23:09:08,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:08,270 INFO L474 AbstractCegarLoop]: Abstraction has 235 states and 328 transitions. [2024-09-24 23:09:08,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 27 states have internal predecessors, (52), 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) [2024-09-24 23:09:08,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:08,271 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 328 transitions. [2024-09-24 23:09:08,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-24 23:09:08,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:08,271 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:08,284 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:08,475 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-24 23:09:08,476 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:08,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:08,476 INFO L85 PathProgramCache]: Analyzing trace with hash -737150836, now seen corresponding path program 10 times [2024-09-24 23:09:08,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:08,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305447183] [2024-09-24 23:09:08,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:08,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:08,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:08,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:08,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305447183] [2024-09-24 23:09:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305447183] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82561655] [2024-09-24 23:09:08,660 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:09:08,660 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:08,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:08,662 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:08,666 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-24 23:09:08,710 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:09:08,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:08,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-24 23:09:08,712 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:08,734 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:08,734 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:08,814 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:08,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82561655] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:08,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:08,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-24 23:09:08,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546239048] [2024-09-24 23:09:08,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:08,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-24 23:09:08,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:08,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-24 23:09:08,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-24 23:09:08,816 INFO L87 Difference]: Start difference. First operand 235 states and 328 transitions. Second operand has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-24 23:09:13,090 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:09:13,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:13,179 INFO L93 Difference]: Finished difference Result 462 states and 718 transitions. [2024-09-24 23:09:13,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-24 23:09:13,179 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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 33 [2024-09-24 23:09:13,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:13,181 INFO L225 Difference]: With dead ends: 462 [2024-09-24 23:09:13,181 INFO L226 Difference]: Without dead ends: 423 [2024-09-24 23:09:13,181 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-24 23:09:13,182 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 36 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 122 mSolverCounterSat, 32 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 122 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:13,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 169 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 122 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-09-24 23:09:13,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2024-09-24 23:09:13,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 333. [2024-09-24 23:09:13,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 328 states have (on average 1.4695121951219512) internal successors, (482), 328 states have internal predecessors, (482), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:13,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 486 transitions. [2024-09-24 23:09:13,296 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 486 transitions. Word has length 33 [2024-09-24 23:09:13,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:13,296 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 486 transitions. [2024-09-24 23:09:13,296 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5) internal successors, (35), 14 states have internal predecessors, (35), 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) [2024-09-24 23:09:13,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:13,297 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 486 transitions. [2024-09-24 23:09:13,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-24 23:09:13,298 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:13,298 INFO L216 NwaCegarLoop]: trace histogram [9, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:13,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:13,498 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-24 23:09:13,498 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:13,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:13,499 INFO L85 PathProgramCache]: Analyzing trace with hash 1047726976, now seen corresponding path program 11 times [2024-09-24 23:09:13,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:13,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1871911227] [2024-09-24 23:09:13,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:13,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:13,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:13,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:13,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:13,669 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:09:13,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1871911227] [2024-09-24 23:09:13,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1871911227] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:13,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483157728] [2024-09-24 23:09:13,670 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:09:13,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:13,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:13,671 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:13,676 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-24 23:09:13,739 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-24 23:09:13,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:13,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-24 23:09:13,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:13,803 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-24 23:09:13,804 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:13,944 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2024-09-24 23:09:13,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [483157728] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:13,944 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:13,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 8] total 24 [2024-09-24 23:09:13,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523782849] [2024-09-24 23:09:13,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:13,945 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:09:13,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:13,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:09:13,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=470, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:09:13,946 INFO L87 Difference]: Start difference. First operand 333 states and 486 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-09-24 23:09:15,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:15,115 INFO L93 Difference]: Finished difference Result 676 states and 984 transitions. [2024-09-24 23:09:15,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-24 23:09:15,116 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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 34 [2024-09-24 23:09:15,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:15,119 INFO L225 Difference]: With dead ends: 676 [2024-09-24 23:09:15,119 INFO L226 Difference]: Without dead ends: 511 [2024-09-24 23:09:15,120 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=305, Invalid=2451, Unknown=0, NotChecked=0, Total=2756 [2024-09-24 23:09:15,120 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 71 mSDsluCounter, 534 mSDsCounter, 0 mSdLazyCounter, 818 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 581 SdHoareTripleChecker+Invalid, 901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 818 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:15,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 581 Invalid, 901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 818 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-24 23:09:15,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2024-09-24 23:09:15,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 367. [2024-09-24 23:09:15,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 362 states have (on average 1.4116022099447514) internal successors, (511), 362 states have internal predecessors, (511), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 515 transitions. [2024-09-24 23:09:15,252 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 515 transitions. Word has length 34 [2024-09-24 23:09:15,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:15,252 INFO L474 AbstractCegarLoop]: Abstraction has 367 states and 515 transitions. [2024-09-24 23:09:15,252 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 24 states have internal predecessors, (39), 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) [2024-09-24 23:09:15,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:15,252 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 515 transitions. [2024-09-24 23:09:15,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-24 23:09:15,253 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:15,253 INFO L216 NwaCegarLoop]: trace histogram [10, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:15,265 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-24 23:09:15,454 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-24 23:09:15,454 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:15,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash 513042476, now seen corresponding path program 12 times [2024-09-24 23:09:15,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:15,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837017266] [2024-09-24 23:09:15,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:15,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:15,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:15,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:15,629 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-24 23:09:15,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:15,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837017266] [2024-09-24 23:09:15,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837017266] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:15,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854516265] [2024-09-24 23:09:15,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:09:15,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:15,630 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:15,631 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:15,632 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-24 23:09:15,691 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-24 23:09:15,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:15,692 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-24 23:09:15,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:15,827 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-24 23:09:15,827 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:16,060 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-24 23:09:16,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854516265] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:16,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:16,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 10] total 30 [2024-09-24 23:09:16,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195300820] [2024-09-24 23:09:16,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:16,061 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:09:16,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:16,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:09:16,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=740, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:09:16,061 INFO L87 Difference]: Start difference. First operand 367 states and 515 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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) [2024-09-24 23:09:18,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:18,476 INFO L93 Difference]: Finished difference Result 742 states and 1046 transitions. [2024-09-24 23:09:18,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2024-09-24 23:09:18,476 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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 35 [2024-09-24 23:09:18,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:18,479 INFO L225 Difference]: With dead ends: 742 [2024-09-24 23:09:18,479 INFO L226 Difference]: Without dead ends: 595 [2024-09-24 23:09:18,484 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1939 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1068, Invalid=6942, Unknown=0, NotChecked=0, Total=8010 [2024-09-24 23:09:18,485 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 210 mSDsluCounter, 635 mSDsCounter, 0 mSdLazyCounter, 1763 mSolverCounterSat, 309 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 686 SdHoareTripleChecker+Invalid, 2072 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 309 IncrementalHoareTripleChecker+Valid, 1763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:18,485 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 686 Invalid, 2072 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [309 Valid, 1763 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-24 23:09:18,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2024-09-24 23:09:18,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 383. [2024-09-24 23:09:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 378 states have (on average 1.3862433862433863) internal successors, (524), 378 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:18,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 528 transitions. [2024-09-24 23:09:18,635 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 528 transitions. Word has length 35 [2024-09-24 23:09:18,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:18,635 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 528 transitions. [2024-09-24 23:09:18,635 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 30 states have internal predecessors, (50), 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) [2024-09-24 23:09:18,636 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:18,636 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 528 transitions. [2024-09-24 23:09:18,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-24 23:09:18,636 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:18,636 INFO L216 NwaCegarLoop]: trace histogram [8, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:18,659 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-24 23:09:18,837 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-24 23:09:18,837 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:18,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:18,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1273319442, now seen corresponding path program 3 times [2024-09-24 23:09:18,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:18,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010067328] [2024-09-24 23:09:18,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:18,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:18,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:19,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:19,015 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 14 proven. 42 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2024-09-24 23:09:19,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010067328] [2024-09-24 23:09:19,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1010067328] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:19,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687976871] [2024-09-24 23:09:19,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:19,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:19,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:19,016 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:19,021 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-24 23:09:19,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:09:19,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:19,076 INFO L262 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-24 23:09:19,077 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:19,212 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-24 23:09:19,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:19,376 INFO L134 CoverageAnalysis]: Checked inductivity of 79 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-24 23:09:19,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687976871] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:19,377 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:19,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9, 9] total 30 [2024-09-24 23:09:19,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454358894] [2024-09-24 23:09:19,377 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:19,377 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:09:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:19,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:09:19,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:09:19,378 INFO L87 Difference]: Start difference. First operand 383 states and 528 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2024-09-24 23:09:21,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:21,496 INFO L93 Difference]: Finished difference Result 812 states and 1129 transitions. [2024-09-24 23:09:21,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2024-09-24 23:09:21,497 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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 36 [2024-09-24 23:09:21,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:21,502 INFO L225 Difference]: With dead ends: 812 [2024-09-24 23:09:21,505 INFO L226 Difference]: Without dead ends: 735 [2024-09-24 23:09:21,507 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1943 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1589, Invalid=6243, Unknown=0, NotChecked=0, Total=7832 [2024-09-24 23:09:21,507 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 209 mSDsluCounter, 350 mSDsCounter, 0 mSdLazyCounter, 1273 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 374 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 1273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:21,507 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 374 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 1273 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-24 23:09:21,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-24 23:09:21,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 436. [2024-09-24 23:09:21,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.382830626450116) internal successors, (596), 431 states have internal predecessors, (596), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:21,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 600 transitions. [2024-09-24 23:09:21,669 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 600 transitions. Word has length 36 [2024-09-24 23:09:21,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:21,669 INFO L474 AbstractCegarLoop]: Abstraction has 436 states and 600 transitions. [2024-09-24 23:09:21,669 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 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) [2024-09-24 23:09:21,670 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:21,670 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 600 transitions. [2024-09-24 23:09:21,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:09:21,670 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:21,670 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:21,683 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:21,871 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-24 23:09:21,872 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:21,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:21,872 INFO L85 PathProgramCache]: Analyzing trace with hash 771129250, now seen corresponding path program 13 times [2024-09-24 23:09:21,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:21,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242873782] [2024-09-24 23:09:21,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:21,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:21,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:22,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:22,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:22,081 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:09:22,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242873782] [2024-09-24 23:09:22,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242873782] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:22,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [685256347] [2024-09-24 23:09:22,081 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:09:22,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:22,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:22,083 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:22,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-24 23:09:22,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:22,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:09:22,137 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:22,222 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:09:22,222 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:22,339 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 8 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:09:22,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [685256347] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:22,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:22,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 18 [2024-09-24 23:09:22,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151893184] [2024-09-24 23:09:22,340 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:22,340 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-24 23:09:22,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:22,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-24 23:09:22,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=226, Unknown=0, NotChecked=0, Total=306 [2024-09-24 23:09:22,340 INFO L87 Difference]: Start difference. First operand 436 states and 600 transitions. Second operand has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2024-09-24 23:09:26,555 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:09:34,599 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:09:42,758 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:09:42,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:42,948 INFO L93 Difference]: Finished difference Result 629 states and 870 transitions. [2024-09-24 23:09:42,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-24 23:09:42,949 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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 38 [2024-09-24 23:09:42,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:42,951 INFO L225 Difference]: With dead ends: 629 [2024-09-24 23:09:42,951 INFO L226 Difference]: Without dead ends: 611 [2024-09-24 23:09:42,951 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 11 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=189, Invalid=621, Unknown=2, NotChecked=0, Total=812 [2024-09-24 23:09:42,952 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 30 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 29 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:42,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 172 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 193 Invalid, 3 Unknown, 0 Unchecked, 12.1s Time] [2024-09-24 23:09:42,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 611 states. [2024-09-24 23:09:43,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 611 to 476. [2024-09-24 23:09:43,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 471 states have (on average 1.3736730360934182) internal successors, (647), 471 states have internal predecessors, (647), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:43,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 651 transitions. [2024-09-24 23:09:43,142 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 651 transitions. Word has length 38 [2024-09-24 23:09:43,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:43,142 INFO L474 AbstractCegarLoop]: Abstraction has 476 states and 651 transitions. [2024-09-24 23:09:43,142 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.3333333333333335) internal successors, (42), 18 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) [2024-09-24 23:09:43,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:43,142 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 651 transitions. [2024-09-24 23:09:43,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-24 23:09:43,143 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:43,143 INFO L216 NwaCegarLoop]: trace histogram [11, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:43,156 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-24 23:09:43,347 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:43,347 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:43,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:43,348 INFO L85 PathProgramCache]: Analyzing trace with hash 1102958530, now seen corresponding path program 14 times [2024-09-24 23:09:43,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:43,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591027859] [2024-09-24 23:09:43,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:43,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:43,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:43,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:43,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:43,554 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-24 23:09:43,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:43,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591027859] [2024-09-24 23:09:43,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591027859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:43,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358049843] [2024-09-24 23:09:43,554 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:09:43,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:43,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:43,558 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:43,561 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-24 23:09:43,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:09:43,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:43,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-24 23:09:43,604 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:43,847 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:43,847 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:44,316 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-24 23:09:44,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358049843] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:44,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:44,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 17] total 45 [2024-09-24 23:09:44,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551663864] [2024-09-24 23:09:44,317 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:44,317 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-24 23:09:44,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:44,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-24 23:09:44,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=331, Invalid=1649, Unknown=0, NotChecked=0, Total=1980 [2024-09-24 23:09:44,318 INFO L87 Difference]: Start difference. First operand 476 states and 651 transitions. Second operand has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:48,486 INFO L93 Difference]: Finished difference Result 1019 states and 1392 transitions. [2024-09-24 23:09:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2024-09-24 23:09:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-24 23:09:48,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:48,489 INFO L225 Difference]: With dead ends: 1019 [2024-09-24 23:09:48,489 INFO L226 Difference]: Without dead ends: 779 [2024-09-24 23:09:48,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3516 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=1601, Invalid=10389, Unknown=0, NotChecked=0, Total=11990 [2024-09-24 23:09:48,491 INFO L434 NwaCegarLoop]: 57 mSDtfsCounter, 92 mSDsluCounter, 1247 mSDsCounter, 0 mSdLazyCounter, 2263 mSolverCounterSat, 351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1304 SdHoareTripleChecker+Invalid, 2614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 351 IncrementalHoareTripleChecker+Valid, 2263 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:48,491 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1304 Invalid, 2614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [351 Valid, 2263 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-24 23:09:48,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2024-09-24 23:09:48,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 468. [2024-09-24 23:09:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 463 states have (on average 1.408207343412527) internal successors, (652), 463 states have internal predecessors, (652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:48,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 656 transitions. [2024-09-24 23:09:48,740 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 656 transitions. Word has length 38 [2024-09-24 23:09:48,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:48,740 INFO L474 AbstractCegarLoop]: Abstraction has 468 states and 656 transitions. [2024-09-24 23:09:48,740 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 1.5227272727272727) internal successors, (67), 44 states have internal predecessors, (67), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:48,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 656 transitions. [2024-09-24 23:09:48,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-24 23:09:48,741 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:48,741 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:48,756 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:48,942 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:48,942 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:48,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:48,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1715821890, now seen corresponding path program 4 times [2024-09-24 23:09:48,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:48,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865724501] [2024-09-24 23:09:48,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:48,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:48,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:49,135 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:49,136 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-24 23:09:49,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865724501] [2024-09-24 23:09:49,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [865724501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:49,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994360004] [2024-09-24 23:09:49,137 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:09:49,137 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:49,137 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:49,139 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:49,141 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-24 23:09:49,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:09:49,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:49,185 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-24 23:09:49,186 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:49,365 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:09:49,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:49,630 INFO L134 CoverageAnalysis]: Checked inductivity of 95 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:09:49,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994360004] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:49,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:49,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 10, 10] total 34 [2024-09-24 23:09:49,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408561691] [2024-09-24 23:09:49,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:49,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-24 23:09:49,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:49,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-24 23:09:49,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=927, Unknown=0, NotChecked=0, Total=1122 [2024-09-24 23:09:49,632 INFO L87 Difference]: Start difference. First operand 468 states and 656 transitions. Second operand has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-24 23:09:53,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:53,345 INFO L93 Difference]: Finished difference Result 1176 states and 1620 transitions. [2024-09-24 23:09:53,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2024-09-24 23:09:53,346 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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 39 [2024-09-24 23:09:53,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:53,349 INFO L225 Difference]: With dead ends: 1176 [2024-09-24 23:09:53,349 INFO L226 Difference]: Without dead ends: 1076 [2024-09-24 23:09:53,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3892 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=2517, Invalid=10823, Unknown=0, NotChecked=0, Total=13340 [2024-09-24 23:09:53,353 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 231 mSDsluCounter, 515 mSDsCounter, 0 mSdLazyCounter, 2372 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 231 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 2591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2372 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:53,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [231 Valid, 542 Invalid, 2591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2372 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2024-09-24 23:09:53,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1076 states. [2024-09-24 23:09:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1076 to 537. [2024-09-24 23:09:53,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 537 states, 532 states have (on average 1.3966165413533835) internal successors, (743), 532 states have internal predecessors, (743), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:53,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 537 states to 537 states and 747 transitions. [2024-09-24 23:09:53,648 INFO L78 Accepts]: Start accepts. Automaton has 537 states and 747 transitions. Word has length 39 [2024-09-24 23:09:53,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:53,648 INFO L474 AbstractCegarLoop]: Abstraction has 537 states and 747 transitions. [2024-09-24 23:09:53,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 34 states have internal predecessors, (59), 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) [2024-09-24 23:09:53,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:53,648 INFO L276 IsEmpty]: Start isEmpty. Operand 537 states and 747 transitions. [2024-09-24 23:09:53,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:09:53,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:53,649 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:53,663 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:53,853 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:53,854 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:53,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:53,854 INFO L85 PathProgramCache]: Analyzing trace with hash -1752322643, now seen corresponding path program 15 times [2024-09-24 23:09:53,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:53,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517975734] [2024-09-24 23:09:53,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:53,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:53,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:53,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:53,992 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:09:53,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:53,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517975734] [2024-09-24 23:09:53,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517975734] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:53,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141473363] [2024-09-24 23:09:53,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:09:53,992 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:53,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:53,994 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:53,995 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-24 23:09:54,058 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-24 23:09:54,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:54,059 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-24 23:09:54,060 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:54,092 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:09:54,092 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:54,170 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:09:54,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141473363] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:54,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:54,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 8 [2024-09-24 23:09:54,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061711335] [2024-09-24 23:09:54,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:54,171 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-24 23:09:54,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:54,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-24 23:09:54,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:09:54,172 INFO L87 Difference]: Start difference. First operand 537 states and 747 transitions. Second operand has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-09-24 23:09:54,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:54,555 INFO L93 Difference]: Finished difference Result 616 states and 847 transitions. [2024-09-24 23:09:54,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-24 23:09:54,555 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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 41 [2024-09-24 23:09:54,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:54,558 INFO L225 Difference]: With dead ends: 616 [2024-09-24 23:09:54,558 INFO L226 Difference]: Without dead ends: 568 [2024-09-24 23:09:54,558 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 80 SyntacticMatches, 10 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2024-09-24 23:09:54,558 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:54,559 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 130 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:09:54,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-24 23:09:54,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 523. [2024-09-24 23:09:54,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 523 states, 518 states have (on average 1.4054054054054055) internal successors, (728), 518 states have internal predecessors, (728), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:54,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 523 states to 523 states and 732 transitions. [2024-09-24 23:09:54,840 INFO L78 Accepts]: Start accepts. Automaton has 523 states and 732 transitions. Word has length 41 [2024-09-24 23:09:54,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:54,841 INFO L474 AbstractCegarLoop]: Abstraction has 523 states and 732 transitions. [2024-09-24 23:09:54,841 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.125) internal successors, (25), 8 states have internal predecessors, (25), 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) [2024-09-24 23:09:54,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:54,841 INFO L276 IsEmpty]: Start isEmpty. Operand 523 states and 732 transitions. [2024-09-24 23:09:54,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-24 23:09:54,842 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:54,842 INFO L216 NwaCegarLoop]: trace histogram [12, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:54,854 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:55,045 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-24 23:09:55,046 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:55,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:55,046 INFO L85 PathProgramCache]: Analyzing trace with hash 846902028, now seen corresponding path program 16 times [2024-09-24 23:09:55,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:55,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714827483] [2024-09-24 23:09:55,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:55,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:55,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:55,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:55,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-24 23:09:55,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714827483] [2024-09-24 23:09:55,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714827483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:55,313 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738701752] [2024-09-24 23:09:55,313 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:09:55,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:55,314 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:55,315 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:55,317 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-24 23:09:55,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:09:55,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:55,370 INFO L262 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-24 23:09:55,370 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:55,452 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-24 23:09:55,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:55,621 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2024-09-24 23:09:55,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738701752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:55,622 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:55,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 10] total 32 [2024-09-24 23:09:55,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786315514] [2024-09-24 23:09:55,626 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:55,626 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-24 23:09:55,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:55,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-24 23:09:55,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=783, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:09:55,627 INFO L87 Difference]: Start difference. First operand 523 states and 732 transitions. Second operand has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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) [2024-09-24 23:09:57,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:09:57,206 INFO L93 Difference]: Finished difference Result 1216 states and 1685 transitions. [2024-09-24 23:09:57,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-09-24 23:09:57,207 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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 41 [2024-09-24 23:09:57,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:09:57,210 INFO L225 Difference]: With dead ends: 1216 [2024-09-24 23:09:57,210 INFO L226 Difference]: Without dead ends: 972 [2024-09-24 23:09:57,211 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=558, Invalid=1794, Unknown=0, NotChecked=0, Total=2352 [2024-09-24 23:09:57,211 INFO L434 NwaCegarLoop]: 62 mSDtfsCounter, 205 mSDsluCounter, 691 mSDsCounter, 0 mSdLazyCounter, 1132 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 753 SdHoareTripleChecker+Invalid, 1262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 1132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:09:57,211 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 753 Invalid, 1262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 1132 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-24 23:09:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 972 states. [2024-09-24 23:09:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 972 to 584. [2024-09-24 23:09:57,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 579 states have (on average 1.3523316062176165) internal successors, (783), 579 states have internal predecessors, (783), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:09:57,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 787 transitions. [2024-09-24 23:09:57,527 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 787 transitions. Word has length 41 [2024-09-24 23:09:57,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:09:57,527 INFO L474 AbstractCegarLoop]: Abstraction has 584 states and 787 transitions. [2024-09-24 23:09:57,527 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.65625) internal successors, (53), 32 states have internal predecessors, (53), 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) [2024-09-24 23:09:57,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:57,527 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 787 transitions. [2024-09-24 23:09:57,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-24 23:09:57,528 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:09:57,528 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:09:57,540 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-24 23:09:57,730 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-24 23:09:57,731 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:09:57,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:09:57,731 INFO L85 PathProgramCache]: Analyzing trace with hash 706640914, now seen corresponding path program 5 times [2024-09-24 23:09:57,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:09:57,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043803152] [2024-09-24 23:09:57,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:09:57,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:09:57,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:58,013 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:09:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:09:58,014 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 114 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:09:58,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:09:58,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043803152] [2024-09-24 23:09:58,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043803152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:09:58,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900173359] [2024-09-24 23:09:58,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:09:58,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:09:58,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:09:58,016 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:09:58,017 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-24 23:09:58,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-24 23:09:58,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:09:58,133 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-24 23:09:58,134 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:09:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-24 23:09:58,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:09:58,857 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-24 23:09:58,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900173359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:09:58,858 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:09:58,858 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-24 23:09:58,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527690998] [2024-09-24 23:09:58,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:09:58,859 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-24 23:09:58,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:09:58,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-24 23:09:58,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2024-09-24 23:09:58,859 INFO L87 Difference]: Start difference. First operand 584 states and 787 transitions. Second operand has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-24 23:10:05,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:05,498 INFO L93 Difference]: Finished difference Result 1001 states and 1353 transitions. [2024-09-24 23:10:05,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2024-09-24 23:10:05,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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 42 [2024-09-24 23:10:05,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:05,502 INFO L225 Difference]: With dead ends: 1001 [2024-09-24 23:10:05,502 INFO L226 Difference]: Without dead ends: 893 [2024-09-24 23:10:05,504 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 259 GetRequests, 72 SyntacticMatches, 16 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10193 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=1557, Invalid=28199, Unknown=0, NotChecked=0, Total=29756 [2024-09-24 23:10:05,504 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 3704 mSolverCounterSat, 223 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 285 SdHoareTripleChecker+Invalid, 3927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 223 IncrementalHoareTripleChecker+Valid, 3704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:05,504 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 285 Invalid, 3927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [223 Valid, 3704 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2024-09-24 23:10:05,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2024-09-24 23:10:05,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 552. [2024-09-24 23:10:05,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.3345521023765996) internal successors, (730), 547 states have internal predecessors, (730), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:05,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 734 transitions. [2024-09-24 23:10:05,851 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 734 transitions. Word has length 42 [2024-09-24 23:10:05,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:05,852 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 734 transitions. [2024-09-24 23:10:05,852 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.1) internal successors, (63), 30 states have internal predecessors, (63), 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) [2024-09-24 23:10:05,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:05,852 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 734 transitions. [2024-09-24 23:10:05,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-24 23:10:05,853 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:05,853 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:05,865 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-24 23:10:06,056 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-24 23:10:06,057 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:06,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:06,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1382511156, now seen corresponding path program 17 times [2024-09-24 23:10:06,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:06,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274127840] [2024-09-24 23:10:06,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:06,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:06,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:06,376 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:06,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:06,378 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 21 proven. 31 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-24 23:10:06,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274127840] [2024-09-24 23:10:06,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274127840] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:06,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414522870] [2024-09-24 23:10:06,378 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:10:06,378 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:06,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:06,380 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:10:06,381 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-24 23:10:06,472 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-24 23:10:06,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:06,473 INFO L262 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-24 23:10:06,474 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:06,589 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-24 23:10:06,589 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:06,757 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 10 proven. 32 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2024-09-24 23:10:06,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414522870] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:06,757 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:06,757 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 9, 9] total 21 [2024-09-24 23:10:06,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543361212] [2024-09-24 23:10:06,758 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:06,758 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-24 23:10:06,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:06,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-24 23:10:06,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=315, Unknown=0, NotChecked=0, Total=420 [2024-09-24 23:10:06,759 INFO L87 Difference]: Start difference. First operand 552 states and 734 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2024-09-24 23:10:11,083 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:19,160 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:27,236 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:35,395 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:39,626 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:10:39,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:39,920 INFO L93 Difference]: Finished difference Result 891 states and 1231 transitions. [2024-09-24 23:10:39,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-24 23:10:39,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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 43 [2024-09-24 23:10:39,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:39,924 INFO L225 Difference]: With dead ends: 891 [2024-09-24 23:10:39,924 INFO L226 Difference]: Without dead ends: 860 [2024-09-24 23:10:39,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 73 SyntacticMatches, 13 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 12.7s TimeCoverageRelationStatistics Valid=344, Invalid=1293, Unknown=3, NotChecked=0, Total=1640 [2024-09-24 23:10:39,925 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 52 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 39 mSolverCounterUnsat, 5 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 5 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 20.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:39,925 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 188 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 232 Invalid, 5 Unknown, 0 Unchecked, 20.2s Time] [2024-09-24 23:10:39,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 860 states. [2024-09-24 23:10:40,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 860 to 690. [2024-09-24 23:10:40,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 690 states, 685 states have (on average 1.3620437956204379) internal successors, (933), 685 states have internal predecessors, (933), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:40,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 690 states to 690 states and 937 transitions. [2024-09-24 23:10:40,355 INFO L78 Accepts]: Start accepts. Automaton has 690 states and 937 transitions. Word has length 43 [2024-09-24 23:10:40,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:40,355 INFO L474 AbstractCegarLoop]: Abstraction has 690 states and 937 transitions. [2024-09-24 23:10:40,355 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 21 states have internal predecessors, (47), 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) [2024-09-24 23:10:40,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:40,355 INFO L276 IsEmpty]: Start isEmpty. Operand 690 states and 937 transitions. [2024-09-24 23:10:40,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-24 23:10:40,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:40,356 INFO L216 NwaCegarLoop]: trace histogram [13, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:40,369 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-24 23:10:40,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-24 23:10:40,561 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:40,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:40,561 INFO L85 PathProgramCache]: Analyzing trace with hash 764816386, now seen corresponding path program 18 times [2024-09-24 23:10:40,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:40,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257538822] [2024-09-24 23:10:40,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:40,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:40,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:40,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:40,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:40,804 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 0 proven. 97 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-24 23:10:40,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257538822] [2024-09-24 23:10:40,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [257538822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:40,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239863659] [2024-09-24 23:10:40,805 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:10:40,805 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:40,805 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:40,806 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:10:40,807 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-24 23:10:40,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-24 23:10:40,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:40,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-24 23:10:40,922 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:41,106 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-24 23:10:41,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:41,332 INFO L134 CoverageAnalysis]: Checked inductivity of 133 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 113 trivial. 0 not checked. [2024-09-24 23:10:41,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239863659] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:41,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:41,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10, 10] total 32 [2024-09-24 23:10:41,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304126403] [2024-09-24 23:10:41,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:41,333 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-24 23:10:41,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:41,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-24 23:10:41,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2024-09-24 23:10:41,334 INFO L87 Difference]: Start difference. First operand 690 states and 937 transitions. Second operand has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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) [2024-09-24 23:10:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:45,791 INFO L93 Difference]: Finished difference Result 1431 states and 1953 transitions. [2024-09-24 23:10:45,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2024-09-24 23:10:45,792 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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 44 [2024-09-24 23:10:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:45,795 INFO L225 Difference]: With dead ends: 1431 [2024-09-24 23:10:45,795 INFO L226 Difference]: Without dead ends: 1020 [2024-09-24 23:10:45,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 201 GetRequests, 77 SyntacticMatches, 3 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=1009, Invalid=13997, Unknown=0, NotChecked=0, Total=15006 [2024-09-24 23:10:45,797 INFO L434 NwaCegarLoop]: 60 mSDtfsCounter, 138 mSDsluCounter, 1126 mSDsCounter, 0 mSdLazyCounter, 2486 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1186 SdHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 2486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:45,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1186 Invalid, 2677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 2486 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-24 23:10:45,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1020 states. [2024-09-24 23:10:46,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1020 to 633. [2024-09-24 23:10:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 628 states have (on average 1.372611464968153) internal successors, (862), 628 states have internal predecessors, (862), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:46,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 866 transitions. [2024-09-24 23:10:46,232 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 866 transitions. Word has length 44 [2024-09-24 23:10:46,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:46,232 INFO L474 AbstractCegarLoop]: Abstraction has 633 states and 866 transitions. [2024-09-24 23:10:46,232 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.46875) internal successors, (47), 32 states have internal predecessors, (47), 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) [2024-09-24 23:10:46,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:46,232 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 866 transitions. [2024-09-24 23:10:46,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 23:10:46,233 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:46,233 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:46,249 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2024-09-24 23:10:46,437 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-24 23:10:46,438 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:46,438 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:46,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1388997645, now seen corresponding path program 6 times [2024-09-24 23:10:46,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:46,438 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835591455] [2024-09-24 23:10:46,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:46,439 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:46,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:46,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:46,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:46,762 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:10:46,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835591455] [2024-09-24 23:10:46,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835591455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:46,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604573789] [2024-09-24 23:10:46,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:10:46,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:46,763 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:46,765 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:10:46,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-24 23:10:46,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-24 23:10:46,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:10:46,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-24 23:10:46,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:10:47,192 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-24 23:10:47,192 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:10:47,755 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-24 23:10:47,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604573789] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:10:47,756 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:10:47,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-24 23:10:47,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927567046] [2024-09-24 23:10:47,756 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:10:47,756 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-24 23:10:47,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:10:47,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-24 23:10:47,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:10:47,757 INFO L87 Difference]: Start difference. First operand 633 states and 866 transitions. Second operand has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 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) [2024-09-24 23:10:58,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:10:58,882 INFO L93 Difference]: Finished difference Result 1095 states and 1487 transitions. [2024-09-24 23:10:58,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 212 states. [2024-09-24 23:10:58,882 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 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 45 [2024-09-24 23:10:58,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:10:58,886 INFO L225 Difference]: With dead ends: 1095 [2024-09-24 23:10:58,886 INFO L226 Difference]: Without dead ends: 981 [2024-09-24 23:10:58,888 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 76 SyntacticMatches, 18 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18795 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=2342, Invalid=48960, Unknown=0, NotChecked=0, Total=51302 [2024-09-24 23:10:58,889 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 330 mSDsluCounter, 336 mSDsCounter, 0 mSdLazyCounter, 5338 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 5638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 5338 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:10:58,889 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [330 Valid, 351 Invalid, 5638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 5338 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2024-09-24 23:10:58,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2024-09-24 23:10:59,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 653. [2024-09-24 23:10:59,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 653 states, 648 states have (on average 1.3503086419753085) internal successors, (875), 648 states have internal predecessors, (875), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:10:59,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 653 states to 653 states and 879 transitions. [2024-09-24 23:10:59,354 INFO L78 Accepts]: Start accepts. Automaton has 653 states and 879 transitions. Word has length 45 [2024-09-24 23:10:59,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:10:59,354 INFO L474 AbstractCegarLoop]: Abstraction has 653 states and 879 transitions. [2024-09-24 23:10:59,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0606060606060606) internal successors, (68), 33 states have internal predecessors, (68), 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) [2024-09-24 23:10:59,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:59,355 INFO L276 IsEmpty]: Start isEmpty. Operand 653 states and 879 transitions. [2024-09-24 23:10:59,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-24 23:10:59,356 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:10:59,356 INFO L216 NwaCegarLoop]: trace histogram [14, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:10:59,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2024-09-24 23:10:59,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-24 23:10:59,561 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:10:59,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:10:59,561 INFO L85 PathProgramCache]: Analyzing trace with hash 2100972460, now seen corresponding path program 19 times [2024-09-24 23:10:59,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:10:59,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920174317] [2024-09-24 23:10:59,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:10:59,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:10:59,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:59,836 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:10:59,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:59,838 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:10:59,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:10:59,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920174317] [2024-09-24 23:10:59,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920174317] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:10:59,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503650315] [2024-09-24 23:10:59,838 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:10:59,838 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:10:59,838 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:10:59,843 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:10:59,845 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-24 23:10:59,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:10:59,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 198 conjuncts, 68 conjuncts are in the unsatisfiable core [2024-09-24 23:10:59,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 115 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-24 23:11:00,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:00,416 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-24 23:11:00,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503650315] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:00,416 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:00,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 14] total 39 [2024-09-24 23:11:00,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852762772] [2024-09-24 23:11:00,416 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:00,417 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-24 23:11:00,417 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:00,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-24 23:11:00,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=1324, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:11:00,418 INFO L87 Difference]: Start difference. First operand 653 states and 879 transitions. Second operand has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:06,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:06,242 INFO L93 Difference]: Finished difference Result 1398 states and 1905 transitions. [2024-09-24 23:11:06,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2024-09-24 23:11:06,243 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2024-09-24 23:11:06,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:06,246 INFO L225 Difference]: With dead ends: 1398 [2024-09-24 23:11:06,247 INFO L226 Difference]: Without dead ends: 1092 [2024-09-24 23:11:06,248 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4609 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=1037, Invalid=15475, Unknown=0, NotChecked=0, Total=16512 [2024-09-24 23:11:06,248 INFO L434 NwaCegarLoop]: 76 mSDtfsCounter, 138 mSDsluCounter, 1588 mSDsCounter, 0 mSdLazyCounter, 2314 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 1664 SdHoareTripleChecker+Invalid, 2520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 2314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:06,248 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 1664 Invalid, 2520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 2314 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-24 23:11:06,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2024-09-24 23:11:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 683. [2024-09-24 23:11:06,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 683 states, 678 states have (on average 1.37905604719764) internal successors, (935), 678 states have internal predecessors, (935), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:06,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 683 states to 683 states and 939 transitions. [2024-09-24 23:11:06,806 INFO L78 Accepts]: Start accepts. Automaton has 683 states and 939 transitions. Word has length 45 [2024-09-24 23:11:06,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:06,807 INFO L474 AbstractCegarLoop]: Abstraction has 683 states and 939 transitions. [2024-09-24 23:11:06,807 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.641025641025641) internal successors, (64), 38 states have internal predecessors, (64), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:06,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:06,807 INFO L276 IsEmpty]: Start isEmpty. Operand 683 states and 939 transitions. [2024-09-24 23:11:06,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-24 23:11:06,808 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:06,808 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:06,821 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-24 23:11:07,008 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-24 23:11:07,009 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:07,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:07,009 INFO L85 PathProgramCache]: Analyzing trace with hash 516511681, now seen corresponding path program 20 times [2024-09-24 23:11:07,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:07,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800951884] [2024-09-24 23:11:07,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:07,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:07,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:07,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:07,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:07,165 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-24 23:11:07,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800951884] [2024-09-24 23:11:07,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800951884] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:07,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203771322] [2024-09-24 23:11:07,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:11:07,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:07,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:07,168 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:07,169 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-24 23:11:07,216 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:11:07,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:07,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-24 23:11:07,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-24 23:11:07,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:07,382 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 63 trivial. 0 not checked. [2024-09-24 23:11:07,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203771322] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:07,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:07,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 9 [2024-09-24 23:11:07,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487979859] [2024-09-24 23:11:07,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:07,383 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-24 23:11:07,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:07,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-24 23:11:07,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:11:07,383 INFO L87 Difference]: Start difference. First operand 683 states and 939 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2024-09-24 23:11:08,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:08,178 INFO L93 Difference]: Finished difference Result 765 states and 1040 transitions. [2024-09-24 23:11:08,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-24 23:11:08,178 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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 46 [2024-09-24 23:11:08,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:08,181 INFO L225 Difference]: With dead ends: 765 [2024-09-24 23:11:08,181 INFO L226 Difference]: Without dead ends: 715 [2024-09-24 23:11:08,182 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 89 SyntacticMatches, 12 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2024-09-24 23:11:08,182 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 3 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:08,183 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 128 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:11:08,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2024-09-24 23:11:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 667. [2024-09-24 23:11:08,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 667 states, 662 states have (on average 1.3867069486404835) internal successors, (918), 662 states have internal predecessors, (918), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:08,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 667 states to 667 states and 922 transitions. [2024-09-24 23:11:08,728 INFO L78 Accepts]: Start accepts. Automaton has 667 states and 922 transitions. Word has length 46 [2024-09-24 23:11:08,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:08,729 INFO L474 AbstractCegarLoop]: Abstraction has 667 states and 922 transitions. [2024-09-24 23:11:08,729 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 9 states have internal predecessors, (27), 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) [2024-09-24 23:11:08,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:08,729 INFO L276 IsEmpty]: Start isEmpty. Operand 667 states and 922 transitions. [2024-09-24 23:11:08,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-24 23:11:08,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:08,730 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:08,742 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-24 23:11:08,934 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-24 23:11:08,935 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:08,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:08,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2051607266, now seen corresponding path program 21 times [2024-09-24 23:11:08,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:08,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [586642741] [2024-09-24 23:11:08,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:08,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:08,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:09,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:09,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:09,280 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 28 proven. 43 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-24 23:11:09,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [586642741] [2024-09-24 23:11:09,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [586642741] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:09,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [577139288] [2024-09-24 23:11:09,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:11:09,281 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:09,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:09,282 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:09,283 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-24 23:11:09,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-24 23:11:09,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:09,497 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:11:09,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:09,653 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-24 23:11:09,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:09,882 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 71 trivial. 0 not checked. [2024-09-24 23:11:09,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [577139288] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:09,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:09,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-24 23:11:09,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282366927] [2024-09-24 23:11:09,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:09,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-24 23:11:09,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:09,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-24 23:11:09,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=419, Unknown=0, NotChecked=0, Total=552 [2024-09-24 23:11:09,884 INFO L87 Difference]: Start difference. First operand 667 states and 922 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2024-09-24 23:11:14,351 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:22,450 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:30,526 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:38,621 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:46,781 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:51,094 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:55,307 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-24 23:11:55,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:11:55,733 INFO L93 Difference]: Finished difference Result 1029 states and 1507 transitions. [2024-09-24 23:11:55,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-24 23:11:55,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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 [2024-09-24 23:11:55,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:11:55,740 INFO L225 Difference]: With dead ends: 1029 [2024-09-24 23:11:55,744 INFO L226 Difference]: Without dead ends: 992 [2024-09-24 23:11:55,744 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 81 SyntacticMatches, 15 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 17.1s TimeCoverageRelationStatistics Valid=447, Invalid=1805, Unknown=4, NotChecked=0, Total=2256 [2024-09-24 23:11:55,745 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 62 mSDsluCounter, 168 mSDsCounter, 0 mSdLazyCounter, 304 mSolverCounterSat, 59 mSolverCounterUnsat, 7 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 28.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 304 IncrementalHoareTripleChecker+Invalid, 7 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 28.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:11:55,745 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 189 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 304 Invalid, 7 Unknown, 0 Unchecked, 28.3s Time] [2024-09-24 23:11:55,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2024-09-24 23:11:56,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 882. [2024-09-24 23:11:56,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 877 states have (on average 1.4378563283922463) internal successors, (1261), 877 states have internal predecessors, (1261), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:11:56,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 1265 transitions. [2024-09-24 23:11:56,476 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 1265 transitions. Word has length 48 [2024-09-24 23:11:56,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:11:56,477 INFO L474 AbstractCegarLoop]: Abstraction has 882 states and 1265 transitions. [2024-09-24 23:11:56,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 24 states have internal predecessors, (52), 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) [2024-09-24 23:11:56,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:56,477 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 1265 transitions. [2024-09-24 23:11:56,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-24 23:11:56,478 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:11:56,478 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:11:56,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2024-09-24 23:11:56,682 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:56,682 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:11:56,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:11:56,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1035706990, now seen corresponding path program 22 times [2024-09-24 23:11:56,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:11:56,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291843255] [2024-09-24 23:11:56,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:11:56,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:11:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:56,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:11:56,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:11:56,984 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2024-09-24 23:11:56,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:11:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291843255] [2024-09-24 23:11:56,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291843255] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:11:56,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839649056] [2024-09-24 23:11:56,985 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-24 23:11:56,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:11:56,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:11:56,986 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:11:56,987 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-24 23:11:57,038 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-24 23:11:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:11:57,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-24 23:11:57,045 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:11:57,389 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:11:57,390 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:11:57,928 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 24 proven. 74 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-24 23:11:57,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839649056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:11:57,929 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:11:57,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12, 12] total 33 [2024-09-24 23:11:57,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635997366] [2024-09-24 23:11:57,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:11:57,929 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-24 23:11:57,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:11:57,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-24 23:11:57,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2024-09-24 23:11:57,930 INFO L87 Difference]: Start difference. First operand 882 states and 1265 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-24 23:12:05,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:05,168 INFO L93 Difference]: Finished difference Result 1260 states and 1741 transitions. [2024-09-24 23:12:05,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2024-09-24 23:12:05,169 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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 [2024-09-24 23:12:05,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:05,173 INFO L225 Difference]: With dead ends: 1260 [2024-09-24 23:12:05,173 INFO L226 Difference]: Without dead ends: 1162 [2024-09-24 23:12:05,174 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 235 GetRequests, 83 SyntacticMatches, 18 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5345 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=1577, Invalid=16783, Unknown=0, NotChecked=0, Total=18360 [2024-09-24 23:12:05,174 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 190 mSDsluCounter, 633 mSDsCounter, 0 mSdLazyCounter, 2279 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 664 SdHoareTripleChecker+Invalid, 2443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 2279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:05,174 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 664 Invalid, 2443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 2279 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-24 23:12:05,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2024-09-24 23:12:05,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 834. [2024-09-24 23:12:05,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 834 states, 829 states have (on average 1.4330518697225574) internal successors, (1188), 829 states have internal predecessors, (1188), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:05,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 834 states to 834 states and 1192 transitions. [2024-09-24 23:12:05,879 INFO L78 Accepts]: Start accepts. Automaton has 834 states and 1192 transitions. Word has length 48 [2024-09-24 23:12:05,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:05,879 INFO L474 AbstractCegarLoop]: Abstraction has 834 states and 1192 transitions. [2024-09-24 23:12:05,879 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 33 states have internal predecessors, (59), 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) [2024-09-24 23:12:05,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:05,879 INFO L276 IsEmpty]: Start isEmpty. Operand 834 states and 1192 transitions. [2024-09-24 23:12:05,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-24 23:12:05,880 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:05,880 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:05,894 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2024-09-24 23:12:06,081 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:06,081 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:06,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:06,082 INFO L85 PathProgramCache]: Analyzing trace with hash -308673998, now seen corresponding path program 7 times [2024-09-24 23:12:06,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:06,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735820406] [2024-09-24 23:12:06,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:06,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:06,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:06,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:06,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:06,545 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:06,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735820406] [2024-09-24 23:12:06,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735820406] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:06,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104151950] [2024-09-24 23:12:06,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:12:06,545 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:06,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:06,547 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:06,547 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-24 23:12:06,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:06,598 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-24 23:12:06,599 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-24 23:12:06,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:07,630 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 10 proven. 100 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2024-09-24 23:12:07,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104151950] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:07,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:07,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-24 23:12:07,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476690237] [2024-09-24 23:12:07,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:07,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 23:12:07,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:07,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 23:12:07,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 23:12:07,632 INFO L87 Difference]: Start difference. First operand 834 states and 1192 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-24 23:12:21,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:21,932 INFO L93 Difference]: Finished difference Result 1394 states and 1948 transitions. [2024-09-24 23:12:21,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 239 states. [2024-09-24 23:12:21,933 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 [2024-09-24 23:12:21,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:21,937 INFO L225 Difference]: With dead ends: 1394 [2024-09-24 23:12:21,937 INFO L226 Difference]: Without dead ends: 1258 [2024-09-24 23:12:21,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 80 SyntacticMatches, 20 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24160 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=2754, Invalid=62526, Unknown=0, NotChecked=0, Total=65280 [2024-09-24 23:12:21,941 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 327 mSDsluCounter, 385 mSDsCounter, 0 mSdLazyCounter, 6761 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 7062 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 6761 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:21,941 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [327 Valid, 400 Invalid, 7062 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 6761 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2024-09-24 23:12:21,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1258 states. [2024-09-24 23:12:22,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1258 to 855. [2024-09-24 23:12:22,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 850 states have (on average 1.4141176470588235) internal successors, (1202), 850 states have internal predecessors, (1202), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:22,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 1206 transitions. [2024-09-24 23:12:22,712 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 1206 transitions. Word has length 48 [2024-09-24 23:12:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:22,713 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 1206 transitions. [2024-09-24 23:12:22,714 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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) [2024-09-24 23:12:22,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:22,714 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 1206 transitions. [2024-09-24 23:12:22,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-24 23:12:22,718 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:22,718 INFO L216 NwaCegarLoop]: trace histogram [15, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:22,731 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-24 23:12:22,919 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:22,919 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:22,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:22,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1163134880, now seen corresponding path program 23 times [2024-09-24 23:12:22,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:22,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790009738] [2024-09-24 23:12:22,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:22,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:22,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:23,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-24 23:12:23,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790009738] [2024-09-24 23:12:23,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790009738] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:23,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907186621] [2024-09-24 23:12:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-24 23:12:23,287 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:23,287 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:23,288 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:23,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-24 23:12:23,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-24 23:12:23,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:12:23,467 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-24 23:12:23,468 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-24 23:12:23,649 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:23,967 INFO L134 CoverageAnalysis]: Checked inductivity of 170 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-24 23:12:23,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907186621] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:23,968 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:23,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 12] total 39 [2024-09-24 23:12:23,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980535134] [2024-09-24 23:12:23,968 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:23,968 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-24 23:12:23,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:23,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-24 23:12:23,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=1182, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:12:23,970 INFO L87 Difference]: Start difference. First operand 855 states and 1206 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-24 23:12:27,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:27,770 INFO L93 Difference]: Finished difference Result 1918 states and 2689 transitions. [2024-09-24 23:12:27,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2024-09-24 23:12:27,771 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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 [2024-09-24 23:12:27,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:27,776 INFO L225 Difference]: With dead ends: 1918 [2024-09-24 23:12:27,776 INFO L226 Difference]: Without dead ends: 1657 [2024-09-24 23:12:27,777 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=984, Invalid=3176, Unknown=0, NotChecked=0, Total=4160 [2024-09-24 23:12:27,777 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 375 mSDsluCounter, 1319 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 249 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 375 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 249 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:27,777 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [375 Valid, 1399 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [249 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2024-09-24 23:12:27,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2024-09-24 23:12:28,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 957. [2024-09-24 23:12:28,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 957 states, 952 states have (on average 1.3592436974789917) internal successors, (1294), 952 states have internal predecessors, (1294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:28,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 957 states to 957 states and 1298 transitions. [2024-09-24 23:12:28,549 INFO L78 Accepts]: Start accepts. Automaton has 957 states and 1298 transitions. Word has length 48 [2024-09-24 23:12:28,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:28,549 INFO L474 AbstractCegarLoop]: Abstraction has 957 states and 1298 transitions. [2024-09-24 23:12:28,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 39 states have internal predecessors, (61), 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) [2024-09-24 23:12:28,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:28,550 INFO L276 IsEmpty]: Start isEmpty. Operand 957 states and 1298 transitions. [2024-09-24 23:12:28,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:12:28,551 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:28,551 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:28,564 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2024-09-24 23:12:28,751 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2024-09-24 23:12:28,752 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:28,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:28,752 INFO L85 PathProgramCache]: Analyzing trace with hash -957060563, now seen corresponding path program 24 times [2024-09-24 23:12:28,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:28,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894237238] [2024-09-24 23:12:28,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:28,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:28,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:28,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:28,983 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:12:28,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894237238] [2024-09-24 23:12:28,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894237238] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:28,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749675440] [2024-09-24 23:12:28,983 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-24 23:12:28,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:28,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:28,985 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:28,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-24 23:12:29,083 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-24 23:12:29,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:12:29,084 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-24 23:12:29,085 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:29,128 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:12:29,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:29,257 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-24 23:12:29,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749675440] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:29,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:29,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 10 [2024-09-24 23:12:29,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876552516] [2024-09-24 23:12:29,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:29,258 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-09-24 23:12:29,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:29,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-09-24 23:12:29,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:12:29,258 INFO L87 Difference]: Start difference. First operand 957 states and 1298 transitions. Second operand has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2024-09-24 23:12:30,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:30,287 INFO L93 Difference]: Finished difference Result 1040 states and 1398 transitions. [2024-09-24 23:12:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-24 23:12:30,288 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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 51 [2024-09-24 23:12:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:30,291 INFO L225 Difference]: With dead ends: 1040 [2024-09-24 23:12:30,292 INFO L226 Difference]: Without dead ends: 988 [2024-09-24 23:12:30,292 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 98 SyntacticMatches, 14 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2024-09-24 23:12:30,292 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 6 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 170 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 168 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 170 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:30,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 168 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 170 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-24 23:12:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 988 states. [2024-09-24 23:12:31,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 988 to 939. [2024-09-24 23:12:31,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3650963597430408) internal successors, (1275), 934 states have internal predecessors, (1275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1279 transitions. [2024-09-24 23:12:31,078 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1279 transitions. Word has length 51 [2024-09-24 23:12:31,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:31,079 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1279 transitions. [2024-09-24 23:12:31,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 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) [2024-09-24 23:12:31,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:31,079 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1279 transitions. [2024-09-24 23:12:31,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:12:31,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:31,080 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:31,092 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-24 23:12:31,280 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-24 23:12:31,281 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:31,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:31,281 INFO L85 PathProgramCache]: Analyzing trace with hash 1426629135, now seen corresponding path program 25 times [2024-09-24 23:12:31,281 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:31,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636956302] [2024-09-24 23:12:31,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:31,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:31,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:31,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:31,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:31,678 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2024-09-24 23:12:31,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:31,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636956302] [2024-09-24 23:12:31,678 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636956302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:31,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837182212] [2024-09-24 23:12:31,679 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-24 23:12:31,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:31,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:31,680 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:31,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-24 23:12:31,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:31,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-24 23:12:31,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:32,126 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-24 23:12:32,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:32,825 INFO L134 CoverageAnalysis]: Checked inductivity of 194 backedges. 27 proven. 92 refuted. 0 times theorem prover too weak. 75 trivial. 0 not checked. [2024-09-24 23:12:32,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837182212] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:32,825 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:32,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 13, 13] total 36 [2024-09-24 23:12:32,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95407930] [2024-09-24 23:12:32,825 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:32,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-24 23:12:32,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:32,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-24 23:12:32,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-24 23:12:32,826 INFO L87 Difference]: Start difference. First operand 939 states and 1279 transitions. Second operand has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-24 23:12:42,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:12:42,635 INFO L93 Difference]: Finished difference Result 1388 states and 1845 transitions. [2024-09-24 23:12:42,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-24 23:12:42,636 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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 51 [2024-09-24 23:12:42,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:12:42,640 INFO L225 Difference]: With dead ends: 1388 [2024-09-24 23:12:42,640 INFO L226 Difference]: Without dead ends: 1286 [2024-09-24 23:12:42,641 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 87 SyntacticMatches, 20 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6656 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1899, Invalid=20751, Unknown=0, NotChecked=0, Total=22650 [2024-09-24 23:12:42,641 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 210 mSDsluCounter, 762 mSDsCounter, 0 mSdLazyCounter, 2808 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 797 SdHoareTripleChecker+Invalid, 2988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 2808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-09-24 23:12:42,641 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [210 Valid, 797 Invalid, 2988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 2808 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-09-24 23:12:42,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2024-09-24 23:12:43,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 939. [2024-09-24 23:12:43,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 939 states, 934 states have (on average 1.3511777301927195) internal successors, (1262), 934 states have internal predecessors, (1262), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:12:43,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 939 states to 939 states and 1266 transitions. [2024-09-24 23:12:43,426 INFO L78 Accepts]: Start accepts. Automaton has 939 states and 1266 transitions. Word has length 51 [2024-09-24 23:12:43,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:12:43,426 INFO L474 AbstractCegarLoop]: Abstraction has 939 states and 1266 transitions. [2024-09-24 23:12:43,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.75) internal successors, (63), 36 states have internal predecessors, (63), 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) [2024-09-24 23:12:43,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:43,427 INFO L276 IsEmpty]: Start isEmpty. Operand 939 states and 1266 transitions. [2024-09-24 23:12:43,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:12:43,428 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:12:43,428 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 11, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:12:43,440 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2024-09-24 23:12:43,629 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:43,629 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:12:43,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:12:43,630 INFO L85 PathProgramCache]: Analyzing trace with hash -693108371, now seen corresponding path program 8 times [2024-09-24 23:12:43,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:12:43,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092936591] [2024-09-24 23:12:43,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:12:43,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:12:43,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:44,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:12:44,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:12:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 0 proven. 204 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-24 23:12:44,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:12:44,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092936591] [2024-09-24 23:12:44,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092936591] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:12:44,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633853521] [2024-09-24 23:12:44,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:12:44,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:12:44,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:12:44,050 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:12:44,052 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-24 23:12:44,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:12:44,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:12:44,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-24 23:12:44,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:12:44,578 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-24 23:12:44,578 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:12:45,336 INFO L134 CoverageAnalysis]: Checked inductivity of 204 backedges. 11 proven. 121 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-24 23:12:45,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633853521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:12:45,337 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:12:45,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 14, 14] total 39 [2024-09-24 23:12:45,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491244473] [2024-09-24 23:12:45,337 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:12:45,337 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-24 23:12:45,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:12:45,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-24 23:12:45,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2024-09-24 23:12:45,338 INFO L87 Difference]: Start difference. First operand 939 states and 1266 transitions. Second operand has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-24 23:13:03,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:13:03,841 INFO L93 Difference]: Finished difference Result 1497 states and 2031 transitions. [2024-09-24 23:13:03,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 274 states. [2024-09-24 23:13:03,841 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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 51 [2024-09-24 23:13:03,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:13:03,845 INFO L225 Difference]: With dead ends: 1497 [2024-09-24 23:13:03,845 INFO L226 Difference]: Without dead ends: 1375 [2024-09-24 23:13:03,848 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 397 GetRequests, 84 SyntacticMatches, 22 SemanticMatches, 291 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32210 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=3237, Invalid=82319, Unknown=0, NotChecked=0, Total=85556 [2024-09-24 23:13:03,849 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 331 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 9248 mSolverCounterSat, 339 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 9587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 339 IncrementalHoareTripleChecker+Valid, 9248 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-24 23:13:03,849 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [331 Valid, 484 Invalid, 9587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [339 Valid, 9248 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-24 23:13:03,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1375 states. [2024-09-24 23:13:04,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1375 to 963. [2024-09-24 23:13:04,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 963 states, 958 states have (on average 1.3392484342379958) internal successors, (1283), 958 states have internal predecessors, (1283), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:13:04,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 963 states to 963 states and 1287 transitions. [2024-09-24 23:13:04,680 INFO L78 Accepts]: Start accepts. Automaton has 963 states and 1287 transitions. Word has length 51 [2024-09-24 23:13:04,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:13:04,680 INFO L474 AbstractCegarLoop]: Abstraction has 963 states and 1287 transitions. [2024-09-24 23:13:04,680 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0) internal successors, (78), 39 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) [2024-09-24 23:13:04,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:13:04,681 INFO L276 IsEmpty]: Start isEmpty. Operand 963 states and 1287 transitions. [2024-09-24 23:13:04,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-24 23:13:04,682 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:13:04,682 INFO L216 NwaCegarLoop]: trace histogram [16, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:13:04,695 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2024-09-24 23:13:04,883 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:13:04,883 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:13:04,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:13:04,883 INFO L85 PathProgramCache]: Analyzing trace with hash -206398450, now seen corresponding path program 26 times [2024-09-24 23:13:04,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:13:04,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366648694] [2024-09-24 23:13:04,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:13:04,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:13:04,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:13:05,190 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:13:05,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:13:05,192 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:13:05,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:13:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366648694] [2024-09-24 23:13:05,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366648694] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:13:05,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [148303929] [2024-09-24 23:13:05,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-24 23:13:05,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:13:05,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:13:05,193 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:13:05,195 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-24 23:13:05,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-24 23:13:05,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:13:05,251 INFO L262 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-24 23:13:05,252 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:13:05,471 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 151 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-24 23:13:05,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:13:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-24 23:13:05,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [148303929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:13:05,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:13:05,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 16] total 45 [2024-09-24 23:13:05,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398843318] [2024-09-24 23:13:05,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:13:05,925 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-24 23:13:05,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:13:05,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-24 23:13:05,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=1781, Unknown=0, NotChecked=0, Total=1980 [2024-09-24 23:13:05,926 INFO L87 Difference]: Start difference. First operand 963 states and 1287 transitions. Second operand has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:13:14,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-24 23:13:14,063 INFO L93 Difference]: Finished difference Result 1828 states and 2515 transitions. [2024-09-24 23:13:14,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2024-09-24 23:13:14,063 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2024-09-24 23:13:14,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-24 23:13:14,068 INFO L225 Difference]: With dead ends: 1828 [2024-09-24 23:13:14,068 INFO L226 Difference]: Without dead ends: 1398 [2024-09-24 23:13:14,069 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7225 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=1455, Invalid=23351, Unknown=0, NotChecked=0, Total=24806 [2024-09-24 23:13:14,070 INFO L434 NwaCegarLoop]: 80 mSDtfsCounter, 163 mSDsluCounter, 1752 mSDsCounter, 0 mSdLazyCounter, 2861 mSolverCounterSat, 278 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 1832 SdHoareTripleChecker+Invalid, 3139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 278 IncrementalHoareTripleChecker+Valid, 2861 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2024-09-24 23:13:14,070 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [163 Valid, 1832 Invalid, 3139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [278 Valid, 2861 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2024-09-24 23:13:14,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1398 states. [2024-09-24 23:13:15,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1398 to 1028. [2024-09-24 23:13:15,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1028 states, 1023 states have (on average 1.3870967741935485) internal successors, (1419), 1023 states have internal predecessors, (1419), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:13:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1028 states to 1028 states and 1423 transitions. [2024-09-24 23:13:15,020 INFO L78 Accepts]: Start accepts. Automaton has 1028 states and 1423 transitions. Word has length 51 [2024-09-24 23:13:15,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-24 23:13:15,020 INFO L474 AbstractCegarLoop]: Abstraction has 1028 states and 1423 transitions. [2024-09-24 23:13:15,020 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6) internal successors, (72), 44 states have internal predecessors, (72), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-24 23:13:15,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:13:15,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1028 states and 1423 transitions. [2024-09-24 23:13:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-24 23:13:15,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-24 23:13:15,022 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-24 23:13:15,034 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2024-09-24 23:13:15,226 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-24 23:13:15,227 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-24 23:13:15,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-24 23:13:15,227 INFO L85 PathProgramCache]: Analyzing trace with hash -700722420, now seen corresponding path program 27 times [2024-09-24 23:13:15,227 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-24 23:13:15,227 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562421331] [2024-09-24 23:13:15,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-24 23:13:15,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-24 23:13:15,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:13:15,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-24 23:13:15,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-24 23:13:15,665 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 36 proven. 57 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-24 23:13:15,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-24 23:13:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562421331] [2024-09-24 23:13:15,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562421331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-24 23:13:15,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361586247] [2024-09-24 23:13:15,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-24 23:13:15,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-24 23:13:15,666 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-24 23:13:15,667 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-24 23:13:15,668 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-24 23:13:15,903 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-24 23:13:15,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-24 23:13:15,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-24 23:13:15,906 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-24 23:13:16,134 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-24 23:13:16,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-24 23:13:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 165 backedges. 14 proven. 58 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2024-09-24 23:13:16,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361586247] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-24 23:13:16,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-24 23:13:16,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 11, 11] total 27 [2024-09-24 23:13:16,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088672545] [2024-09-24 23:13:16,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-24 23:13:16,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-24 23:13:16,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-24 23:13:16,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-24 23:13:16,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=538, Unknown=0, NotChecked=0, Total=702 [2024-09-24 23:13:16,482 INFO L87 Difference]: Start difference. First operand 1028 states and 1423 transitions. Second operand has 27 states, 27 states have (on average 2.111111111111111) internal successors, (57), 27 states have internal predecessors, (57), 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)