./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/theatreSquare.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 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/loops-crafted-1/theatreSquare.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 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-12 15:37:07,206 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-12 15:37:07,262 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-12 15:37:07,267 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-12 15:37:07,267 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-12 15:37:07,290 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-12 15:37:07,292 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-12 15:37:07,292 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-12 15:37:07,292 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-12 15:37:07,293 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-12 15:37:07,293 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-12 15:37:07,294 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-12 15:37:07,294 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-12 15:37:07,295 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-12 15:37:07,296 INFO L153 SettingsManager]: * Use SBE=true [2024-09-12 15:37:07,296 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-12 15:37:07,296 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-12 15:37:07,296 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-12 15:37:07,296 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-12 15:37:07,297 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-12 15:37:07,297 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-12 15:37:07,297 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-12 15:37:07,297 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-12 15:37:07,298 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-12 15:37:07,298 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-12 15:37:07,301 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-12 15:37:07,301 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-12 15:37:07,301 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-12 15:37:07,302 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-12 15:37:07,302 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-12 15:37:07,302 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-12 15:37:07,302 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-12 15:37:07,302 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:37:07,302 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-12 15:37:07,302 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-12 15:37:07,303 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-12 15:37:07,304 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-12 15:37:07,304 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 90f363148c6ea94b18bb0ae0702d2476b109719554576ef0704192e7e62145c3 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-12 15:37:07,554 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-12 15:37:07,571 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-12 15:37:07,574 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-12 15:37:07,575 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-12 15:37:07,575 INFO L274 PluginConnector]: CDTParser initialized [2024-09-12 15:37:07,576 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-12 15:37:08,833 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-12 15:37:08,978 INFO L384 CDTParser]: Found 1 translation units. [2024-09-12 15:37:08,979 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/theatreSquare.c [2024-09-12 15:37:08,987 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/390ce1aed/23d6876980c54b4db9e8e4e34547d204/FLAG7fe9ae21d [2024-09-12 15:37:09,000 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/390ce1aed/23d6876980c54b4db9e8e4e34547d204 [2024-09-12 15:37:09,002 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-12 15:37:09,004 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-12 15:37:09,005 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-12 15:37:09,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-12 15:37:09,010 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-12 15:37:09,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4bf1d5dc and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09, skipping insertion in model container [2024-09-12 15:37:09,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,029 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-12 15:37:09,149 WARN L247 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/theatreSquare.c[370,383] [2024-09-12 15:37:09,172 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:37:09,180 INFO L200 MainTranslator]: Completed pre-run [2024-09-12 15:37:09,190 WARN L247 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/theatreSquare.c[370,383] [2024-09-12 15:37:09,201 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-12 15:37:09,217 INFO L204 MainTranslator]: Completed translation [2024-09-12 15:37:09,218 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09 WrapperNode [2024-09-12 15:37:09,218 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-12 15:37:09,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-12 15:37:09,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-12 15:37:09,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-12 15:37:09,224 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,231 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,236 INFO L138 Inliner]: procedures = 15, calls = 10, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-12 15:37:09,236 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-12 15:37:09,237 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-12 15:37:09,237 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-12 15:37:09,238 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-12 15:37:09,245 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,245 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,246 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,260 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]. [2024-09-12 15:37:09,262 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,263 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,265 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,270 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,270 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,271 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,275 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-12 15:37:09,275 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-12 15:37:09,275 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-12 15:37:09,275 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-12 15:37:09,276 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (1/1) ... [2024-09-12 15:37:09,285 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-12 15:37:09,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:09,310 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) [2024-09-12 15:37:09,318 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 [2024-09-12 15:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-12 15:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure correct_version [2024-09-12 15:37:09,346 INFO L138 BoogieDeclarations]: Found implementation of procedure correct_version [2024-09-12 15:37:09,346 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-12 15:37:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-12 15:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-12 15:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure student_version [2024-09-12 15:37:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure student_version [2024-09-12 15:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-12 15:37:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-12 15:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-12 15:37:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-12 15:37:09,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-12 15:37:09,347 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-12 15:37:09,400 INFO L242 CfgBuilder]: Building ICFG [2024-09-12 15:37:09,403 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-12 15:37:09,580 INFO L? ?]: Removed 20 outVars from TransFormulas that were not future-live. [2024-09-12 15:37:09,582 INFO L291 CfgBuilder]: Performing block encoding [2024-09-12 15:37:09,599 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-12 15:37:09,602 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-12 15:37:09,602 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:37:09 BoogieIcfgContainer [2024-09-12 15:37:09,602 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-12 15:37:09,604 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-12 15:37:09,604 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-12 15:37:09,607 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-12 15:37:09,607 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.09 03:37:09" (1/3) ... [2024-09-12 15:37:09,608 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8b204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:37:09, skipping insertion in model container [2024-09-12 15:37:09,608 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.09 03:37:09" (2/3) ... [2024-09-12 15:37:09,609 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1dd8b204 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.09 03:37:09, skipping insertion in model container [2024-09-12 15:37:09,610 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.09 03:37:09" (3/3) ... [2024-09-12 15:37:09,611 INFO L112 eAbstractionObserver]: Analyzing ICFG theatreSquare.c [2024-09-12 15:37:09,623 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-12 15:37:09,623 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-12 15:37:09,667 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-12 15:37:09,673 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;@4bfde663, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-12 15:37:09,674 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-12 15:37:09,677 INFO L276 IsEmpty]: Start isEmpty. Operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-12 15:37:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2024-09-12 15:37:09,683 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:09,684 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:09,684 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:09,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:09,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1398085946, now seen corresponding path program 1 times [2024-09-12 15:37:09,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:09,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634756895] [2024-09-12 15:37:09,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:09,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:09,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:09,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:09,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:37:09,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:09,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634756895] [2024-09-12 15:37:09,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634756895] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:09,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:09,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:09,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020265054] [2024-09-12 15:37:09,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:09,944 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:09,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:09,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:09,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:09,964 INFO L87 Difference]: Start difference. First operand has 35 states, 23 states have (on average 1.6521739130434783) internal successors, (38), 24 states have internal predecessors, (38), 5 states have call successors, (5), 5 states have call predecessors, (5), 5 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:37:10,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:10,038 INFO L93 Difference]: Finished difference Result 68 states and 95 transitions. [2024-09-12 15:37:10,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 10 [2024-09-12 15:37:10,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:10,045 INFO L225 Difference]: With dead ends: 68 [2024-09-12 15:37:10,045 INFO L226 Difference]: Without dead ends: 29 [2024-09-12 15:37:10,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:37:10,049 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 5 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:10,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 130 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:10,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-12 15:37:10,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-12 15:37:10,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:10,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 34 transitions. [2024-09-12 15:37:10,076 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 34 transitions. Word has length 10 [2024-09-12 15:37:10,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:10,077 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 34 transitions. [2024-09-12 15:37:10,077 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.2) internal successors, (6), 4 states have internal predecessors, (6), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-12 15:37:10,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,078 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 34 transitions. [2024-09-12 15:37:10,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-12 15:37:10,079 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:10,080 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, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:10,080 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-12 15:37:10,080 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:10,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1021222372, now seen corresponding path program 1 times [2024-09-12 15:37:10,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:10,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394888626] [2024-09-12 15:37:10,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:10,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:10,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:10,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,314 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:37:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:37:10,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:10,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394888626] [2024-09-12 15:37:10,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394888626] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:10,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:10,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2024-09-12 15:37:10,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1253454192] [2024-09-12 15:37:10,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:10,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 15:37:10,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:10,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 15:37:10,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:37:10,371 INFO L87 Difference]: Start difference. First operand 29 states and 34 transitions. Second operand has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:10,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:10,505 INFO L93 Difference]: Finished difference Result 45 states and 53 transitions. [2024-09-12 15:37:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-12 15:37:10,505 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 28 [2024-09-12 15:37:10,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:10,508 INFO L225 Difference]: With dead ends: 45 [2024-09-12 15:37:10,508 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 15:37:10,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2024-09-12 15:37:10,510 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 4 mSDsluCounter, 248 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 274 SdHoareTripleChecker+Invalid, 99 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:10,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 274 Invalid, 99 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 15:37:10,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2024-09-12 15:37:10,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 25 states have (on average 1.32) internal successors, (33), 27 states have internal predecessors, (33), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:10,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 45 transitions. [2024-09-12 15:37:10,520 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 45 transitions. Word has length 28 [2024-09-12 15:37:10,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:10,520 INFO L474 AbstractCegarLoop]: Abstraction has 37 states and 45 transitions. [2024-09-12 15:37:10,520 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 8 states have (on average 2.5) internal successors, (20), 9 states have internal predecessors, (20), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:10,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,520 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 45 transitions. [2024-09-12 15:37:10,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 15:37:10,521 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:10,522 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:10,522 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-12 15:37:10,522 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:10,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1777130061, now seen corresponding path program 1 times [2024-09-12 15:37:10,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:10,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080049316] [2024-09-12 15:37:10,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:10,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:10,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:10,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:10,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 16 [2024-09-12 15:37:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:37:10,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:10,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080049316] [2024-09-12 15:37:10,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080049316] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:10,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:10,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:37:10,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224828876] [2024-09-12 15:37:10,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:10,584 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:37:10,584 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:10,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:37:10,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:37:10,589 INFO L87 Difference]: Start difference. First operand 37 states and 45 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:10,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:10,623 INFO L93 Difference]: Finished difference Result 62 states and 77 transitions. [2024-09-12 15:37:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:37:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 29 [2024-09-12 15:37:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:10,624 INFO L225 Difference]: With dead ends: 62 [2024-09-12 15:37:10,624 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 15:37:10,624 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:10,625 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 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 [2024-09-12 15:37:10,625 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:10,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 15:37:10,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-12 15:37:10,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.3448275862068966) internal successors, (39), 31 states have internal predecessors, (39), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:10,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 51 transitions. [2024-09-12 15:37:10,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 51 transitions. Word has length 29 [2024-09-12 15:37:10,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:10,637 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 51 transitions. [2024-09-12 15:37:10,637 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:10,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 51 transitions. [2024-09-12 15:37:10,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-12 15:37:10,639 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:10,639 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:10,639 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-12 15:37:10,639 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:10,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,640 INFO L85 PathProgramCache]: Analyzing trace with hash -464096742, now seen corresponding path program 1 times [2024-09-12 15:37:10,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:10,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041325923] [2024-09-12 15:37:10,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:10,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:10,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:10,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:10,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:37:10,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,716 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-12 15:37:10,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:10,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041325923] [2024-09-12 15:37:10,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041325923] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:10,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:10,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-12 15:37:10,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379318686] [2024-09-12 15:37:10,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:10,721 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-12 15:37:10,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:10,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-12 15:37:10,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-12 15:37:10,722 INFO L87 Difference]: Start difference. First operand 41 states and 51 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:10,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:10,746 INFO L93 Difference]: Finished difference Result 54 states and 68 transitions. [2024-09-12 15:37:10,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-12 15:37:10,752 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 29 [2024-09-12 15:37:10,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:10,755 INFO L225 Difference]: With dead ends: 54 [2024-09-12 15:37:10,755 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 15:37:10,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:10,756 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 82 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 [2024-09-12 15:37:10,756 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 82 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:10,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 15:37:10,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 15:37:10,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.3636363636363635) internal successors, (45), 35 states have internal predecessors, (45), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:10,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 57 transitions. [2024-09-12 15:37:10,768 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 57 transitions. Word has length 29 [2024-09-12 15:37:10,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:10,768 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 57 transitions. [2024-09-12 15:37:10,768 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:10,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,769 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 57 transitions. [2024-09-12 15:37:10,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 15:37:10,769 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:10,769 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:10,770 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-12 15:37:10,770 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:10,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,770 INFO L85 PathProgramCache]: Analyzing trace with hash 1580607788, now seen corresponding path program 1 times [2024-09-12 15:37:10,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:10,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126334617] [2024-09-12 15:37:10,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:10,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:10,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,823 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:10,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:10,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 15 [2024-09-12 15:37:10,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:10,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126334617] [2024-09-12 15:37:10,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126334617] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:10,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:10,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:10,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861643076] [2024-09-12 15:37:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:10,881 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:10,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:10,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:10,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:10,883 INFO L87 Difference]: Start difference. First operand 45 states and 57 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:10,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:10,904 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2024-09-12 15:37:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:10,906 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-12 15:37:10,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:10,906 INFO L225 Difference]: With dead ends: 69 [2024-09-12 15:37:10,906 INFO L226 Difference]: Without dead ends: 42 [2024-09-12 15:37:10,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:10,907 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:10,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-12 15:37:10,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-12 15:37:10,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 32 states have internal predecessors, (40), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:10,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2024-09-12 15:37:10,913 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 30 [2024-09-12 15:37:10,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:10,913 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2024-09-12 15:37:10,913 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:10,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,914 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2024-09-12 15:37:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-12 15:37:10,915 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:10,915 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:10,915 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-12 15:37:10,915 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:10,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:10,915 INFO L85 PathProgramCache]: Analyzing trace with hash -83212372, now seen corresponding path program 1 times [2024-09-12 15:37:10,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:10,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709178734] [2024-09-12 15:37:10,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:10,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:10,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:10,997 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:37:10,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,002 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:11,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709178734] [2024-09-12 15:37:11,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709178734] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:11,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:11,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:11,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742137864] [2024-09-12 15:37:11,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:11,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:11,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,006 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:11,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:11,033 INFO L93 Difference]: Finished difference Result 74 states and 93 transitions. [2024-09-12 15:37:11,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:11,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2024-09-12 15:37:11,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:11,034 INFO L225 Difference]: With dead ends: 74 [2024-09-12 15:37:11,035 INFO L226 Difference]: Without dead ends: 43 [2024-09-12 15:37:11,036 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,037 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 2 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:11,040 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:11,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2024-09-12 15:37:11,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2024-09-12 15:37:11,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 31 states have (on average 1.3225806451612903) internal successors, (41), 33 states have internal predecessors, (41), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:11,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 53 transitions. [2024-09-12 15:37:11,051 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 53 transitions. Word has length 30 [2024-09-12 15:37:11,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:11,051 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 53 transitions. [2024-09-12 15:37:11,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 5.5) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:11,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,052 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 53 transitions. [2024-09-12 15:37:11,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-12 15:37:11,053 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:11,054 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:11,054 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-12 15:37:11,055 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:11,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash -877631710, now seen corresponding path program 1 times [2024-09-12 15:37:11,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:11,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [395215986] [2024-09-12 15:37:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:11,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:11,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:11,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:11,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,137 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-12 15:37:11,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [395215986] [2024-09-12 15:37:11,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [395215986] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:11,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:11,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:11,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625027043] [2024-09-12 15:37:11,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:11,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:11,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,141 INFO L87 Difference]: Start difference. First operand 43 states and 53 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:11,164 INFO L93 Difference]: Finished difference Result 60 states and 74 transitions. [2024-09-12 15:37:11,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:11,164 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 31 [2024-09-12 15:37:11,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:11,165 INFO L225 Difference]: With dead ends: 60 [2024-09-12 15:37:11,166 INFO L226 Difference]: Without dead ends: 45 [2024-09-12 15:37:11,167 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,167 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 3 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:11,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 105 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:11,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-12 15:37:11,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-12 15:37:11,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 33 states have (on average 1.303030303030303) internal successors, (43), 35 states have internal predecessors, (43), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:11,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 55 transitions. [2024-09-12 15:37:11,177 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 55 transitions. Word has length 31 [2024-09-12 15:37:11,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:11,177 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 55 transitions. [2024-09-12 15:37:11,177 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 5 states have internal predecessors, (23), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,178 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 55 transitions. [2024-09-12 15:37:11,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-12 15:37:11,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:11,179 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:11,179 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-09-12 15:37:11,179 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:11,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash 659613075, now seen corresponding path program 1 times [2024-09-12 15:37:11,179 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:11,179 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903478886] [2024-09-12 15:37:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:11,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:11,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,221 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:11,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,225 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:11,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:11,247 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903478886] [2024-09-12 15:37:11,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903478886] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:11,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:11,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:11,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773920820] [2024-09-12 15:37:11,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,247 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:11,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:11,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,248 INFO L87 Difference]: Start difference. First operand 45 states and 55 transitions. Second operand has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:11,264 INFO L93 Difference]: Finished difference Result 53 states and 62 transitions. [2024-09-12 15:37:11,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:11,264 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 32 [2024-09-12 15:37:11,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:11,265 INFO L225 Difference]: With dead ends: 53 [2024-09-12 15:37:11,265 INFO L226 Difference]: Without dead ends: 41 [2024-09-12 15:37:11,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,266 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 1 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:11,266 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 107 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:11,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-12 15:37:11,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-12 15:37:11,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 31 states have internal predecessors, (37), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:11,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 49 transitions. [2024-09-12 15:37:11,270 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 49 transitions. Word has length 32 [2024-09-12 15:37:11,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:11,270 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 49 transitions. [2024-09-12 15:37:11,270 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.8) internal successors, (24), 5 states have internal predecessors, (24), 3 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,270 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 49 transitions. [2024-09-12 15:37:11,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:37:11,271 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:11,271 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:11,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-09-12 15:37:11,271 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:11,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,271 INFO L85 PathProgramCache]: Analyzing trace with hash -1195320207, now seen corresponding path program 1 times [2024-09-12 15:37:11,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:11,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910321725] [2024-09-12 15:37:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:11,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:11,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:11,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:11,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:11,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910321725] [2024-09-12 15:37:11,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910321725] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:11,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:11,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:11,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689089343] [2024-09-12 15:37:11,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,320 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:11,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:11,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,320 INFO L87 Difference]: Start difference. First operand 41 states and 49 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:11,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:11,340 INFO L93 Difference]: Finished difference Result 47 states and 54 transitions. [2024-09-12 15:37:11,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:11,340 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2024-09-12 15:37:11,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:11,341 INFO L225 Difference]: With dead ends: 47 [2024-09-12 15:37:11,341 INFO L226 Difference]: Without dead ends: 39 [2024-09-12 15:37:11,341 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:37:11,342 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:11,342 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:11,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-12 15:37:11,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 34. [2024-09-12 15:37:11,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 25 states have (on average 1.24) internal successors, (31), 25 states have internal predecessors, (31), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:11,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 39 transitions. [2024-09-12 15:37:11,345 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 39 transitions. Word has length 33 [2024-09-12 15:37:11,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:11,345 INFO L474 AbstractCegarLoop]: Abstraction has 34 states and 39 transitions. [2024-09-12 15:37:11,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:11,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,346 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 39 transitions. [2024-09-12 15:37:11,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-12 15:37:11,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:11,346 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:11,346 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-09-12 15:37:11,346 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:11,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,346 INFO L85 PathProgramCache]: Analyzing trace with hash -358658342, now seen corresponding path program 1 times [2024-09-12 15:37:11,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:11,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347500892] [2024-09-12 15:37:11,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:11,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:11,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:11,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-12 15:37:11,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,394 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:11,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347500892] [2024-09-12 15:37:11,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347500892] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-12 15:37:11,394 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-12 15:37:11,394 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-12 15:37:11,394 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810535349] [2024-09-12 15:37:11,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,394 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-12 15:37:11,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-12 15:37:11,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-12 15:37:11,395 INFO L87 Difference]: Start difference. First operand 34 states and 39 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:11,414 INFO L93 Difference]: Finished difference Result 55 states and 63 transitions. [2024-09-12 15:37:11,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-12 15:37:11,414 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 33 [2024-09-12 15:37:11,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:11,415 INFO L225 Difference]: With dead ends: 55 [2024-09-12 15:37:11,415 INFO L226 Difference]: Without dead ends: 35 [2024-09-12 15:37:11,415 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-09-12 15:37:11,415 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 3 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:11,416 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 100 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:11,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-12 15:37:11,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-12 15:37:11,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 26 states have internal predecessors, (32), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-12 15:37:11,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2024-09-12 15:37:11,419 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 33 [2024-09-12 15:37:11,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:11,419 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2024-09-12 15:37:11,419 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:11,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,419 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2024-09-12 15:37:11,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-12 15:37:11,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:11,420 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:11,420 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-09-12 15:37:11,420 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:11,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:11,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1566162331, now seen corresponding path program 1 times [2024-09-12 15:37:11,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:11,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994377545] [2024-09-12 15:37:11,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:11,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:11,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:11,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:11,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,678 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:11,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:11,678 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994377545] [2024-09-12 15:37:11,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994377545] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:11,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1755941638] [2024-09-12 15:37:11,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:11,679 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:11,679 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:11,681 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) [2024-09-12 15:37:11,682 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-12 15:37:11,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:11,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-12 15:37:11,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:11,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:11,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:11,991 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:11,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1755941638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:11,991 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:11,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 24 [2024-09-12 15:37:11,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286438754] [2024-09-12 15:37:11,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:11,992 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:37:11,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:11,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:37:11,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=497, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:37:11,993 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:12,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:12,164 INFO L93 Difference]: Finished difference Result 63 states and 76 transitions. [2024-09-12 15:37:12,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-12 15:37:12,165 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 34 [2024-09-12 15:37:12,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:12,165 INFO L225 Difference]: With dead ends: 63 [2024-09-12 15:37:12,165 INFO L226 Difference]: Without dead ends: 57 [2024-09-12 15:37:12,166 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=81, Invalid=789, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:37:12,166 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 468 mSDsCounter, 0 mSdLazyCounter, 285 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 285 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:12,167 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 496 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 285 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:12,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-12 15:37:12,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 49. [2024-09-12 15:37:12,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 37 states have (on average 1.2702702702702702) internal successors, (47), 39 states have internal predecessors, (47), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:12,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2024-09-12 15:37:12,172 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 34 [2024-09-12 15:37:12,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:12,173 INFO L474 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2024-09-12 15:37:12,173 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 19 states have (on average 1.736842105263158) internal successors, (33), 19 states have internal predecessors, (33), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:12,173 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2024-09-12 15:37:12,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:37:12,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:12,174 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:12,188 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-12 15:37:12,378 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-12 15:37:12,379 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:12,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:12,379 INFO L85 PathProgramCache]: Analyzing trace with hash -344080326, now seen corresponding path program 2 times [2024-09-12 15:37:12,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:12,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631617025] [2024-09-12 15:37:12,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:12,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:12,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:12,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,405 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:12,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:37:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631617025] [2024-09-12 15:37:12,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631617025] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:12,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818901782] [2024-09-12 15:37:12,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:12,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:12,433 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:12,434 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) [2024-09-12 15:37:12,435 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-12 15:37:12,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:12,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:12,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 15:37:12,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:12,517 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:12,548 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818901782] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:12,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:12,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-12 15:37:12,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872666379] [2024-09-12 15:37:12,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:12,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:37:12,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:12,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:37:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:37:12,551 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:12,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:12,575 INFO L93 Difference]: Finished difference Result 86 states and 106 transitions. [2024-09-12 15:37:12,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:37:12,575 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 35 [2024-09-12 15:37:12,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:12,576 INFO L225 Difference]: With dead ends: 86 [2024-09-12 15:37:12,577 INFO L226 Difference]: Without dead ends: 59 [2024-09-12 15:37:12,578 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:37:12,578 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 30 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:12,578 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 111 Invalid, 30 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:12,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-12 15:37:12,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-12 15:37:12,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 49 states have internal predecessors, (60), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:12,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2024-09-12 15:37:12,592 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 35 [2024-09-12 15:37:12,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:12,592 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2024-09-12 15:37:12,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 8 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:12,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:12,593 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2024-09-12 15:37:12,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:37:12,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:12,593 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:12,606 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-12 15:37:12,794 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-12 15:37:12,794 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:12,795 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:12,795 INFO L85 PathProgramCache]: Analyzing trace with hash -177366287, now seen corresponding path program 3 times [2024-09-12 15:37:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021244256] [2024-09-12 15:37:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:12,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:12,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,829 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:12,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:12,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:12,860 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:12,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021244256] [2024-09-12 15:37:12,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021244256] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:12,861 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890533750] [2024-09-12 15:37:12,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:12,861 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:12,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:12,862 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) [2024-09-12 15:37:12,863 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-12 15:37:12,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 15:37:12,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:12,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-09-12 15:37:12,910 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:12,935 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:12,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:12,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1890533750] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:12,969 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:12,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 8 [2024-09-12 15:37:12,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89572192] [2024-09-12 15:37:12,970 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:12,970 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-12 15:37:12,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:12,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-12 15:37:12,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:37:12,971 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:12,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:12,997 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2024-09-12 15:37:12,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-12 15:37:12,998 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 35 [2024-09-12 15:37:12,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:12,999 INFO L225 Difference]: With dead ends: 78 [2024-09-12 15:37:12,999 INFO L226 Difference]: Without dead ends: 69 [2024-09-12 15:37:12,999 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-09-12 15:37:12,999 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 0 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 160 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:12,999 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 160 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:13,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-12 15:37:13,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-12 15:37:13,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 57 states have (on average 1.280701754385965) internal successors, (73), 59 states have internal predecessors, (73), 6 states have call successors, (6), 5 states have call predecessors, (6), 5 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2024-09-12 15:37:13,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 85 transitions. [2024-09-12 15:37:13,011 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 85 transitions. Word has length 35 [2024-09-12 15:37:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:13,011 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 85 transitions. [2024-09-12 15:37:13,011 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 8 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:13,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:13,012 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 85 transitions. [2024-09-12 15:37:13,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:37:13,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:13,012 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:13,025 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-12 15:37:13,213 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-12 15:37:13,213 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:13,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:13,214 INFO L85 PathProgramCache]: Analyzing trace with hash -253773038, now seen corresponding path program 4 times [2024-09-12 15:37:13,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:13,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746758795] [2024-09-12 15:37:13,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:13,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:13,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:13,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:13,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:13,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:13,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:13,320 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:13,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:13,388 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:13,388 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746758795] [2024-09-12 15:37:13,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746758795] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:13,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1790488936] [2024-09-12 15:37:13,389 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:13,389 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:13,389 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:13,390 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) [2024-09-12 15:37:13,391 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-12 15:37:13,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:13,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:13,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:37:13,429 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:13,541 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:13,541 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:13,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1790488936] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:13,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:13,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-12 15:37:13,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280369018] [2024-09-12 15:37:13,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:13,745 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:37:13,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:13,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:37:13,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:37:13,746 INFO L87 Difference]: Start difference. First operand 69 states and 85 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:13,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:13,854 INFO L93 Difference]: Finished difference Result 85 states and 106 transitions. [2024-09-12 15:37:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:13,854 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-12 15:37:13,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:13,855 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:37:13,855 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:37:13,855 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:37:13,856 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 181 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:13,856 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 278 Invalid, 182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 181 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:13,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:37:13,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-12 15:37:13,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (10), 5 states have call predecessors, (10), 5 states have call successors, (10) [2024-09-12 15:37:13,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 97 transitions. [2024-09-12 15:37:13,866 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 97 transitions. Word has length 35 [2024-09-12 15:37:13,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:13,867 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 97 transitions. [2024-09-12 15:37:13,867 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:13,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:13,867 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 97 transitions. [2024-09-12 15:37:13,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-12 15:37:13,867 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:13,868 INFO L216 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:13,880 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-12 15:37:14,068 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:14,068 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:14,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:14,069 INFO L85 PathProgramCache]: Analyzing trace with hash 1805891291, now seen corresponding path program 5 times [2024-09-12 15:37:14,069 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:14,069 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212801590] [2024-09-12 15:37:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:14,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:14,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,114 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:14,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:37:14,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,206 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:14,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212801590] [2024-09-12 15:37:14,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [212801590] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:14,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834055314] [2024-09-12 15:37:14,206 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:14,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:14,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:14,208 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) [2024-09-12 15:37:14,209 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-12 15:37:14,251 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:14,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:14,252 INFO L262 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:37:14,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:14,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:14,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:14,549 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:14,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834055314] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:14,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:14,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 18 [2024-09-12 15:37:14,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322825039] [2024-09-12 15:37:14,550 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:14,550 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:37:14,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:14,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:37:14,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:37:14,551 INFO L87 Difference]: Start difference. First operand 77 states and 97 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:14,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:14,652 INFO L93 Difference]: Finished difference Result 85 states and 104 transitions. [2024-09-12 15:37:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 35 [2024-09-12 15:37:14,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:14,653 INFO L225 Difference]: With dead ends: 85 [2024-09-12 15:37:14,653 INFO L226 Difference]: Without dead ends: 79 [2024-09-12 15:37:14,654 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:37:14,654 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 241 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:14,654 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 273 Invalid, 155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-12 15:37:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 77. [2024-09-12 15:37:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 62 states have (on average 1.2903225806451613) internal successors, (80), 66 states have internal predecessors, (80), 7 states have call successors, (7), 5 states have call predecessors, (7), 7 states have return successors, (8), 5 states have call predecessors, (8), 5 states have call successors, (8) [2024-09-12 15:37:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 95 transitions. [2024-09-12 15:37:14,665 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 95 transitions. Word has length 35 [2024-09-12 15:37:14,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:14,665 INFO L474 AbstractCegarLoop]: Abstraction has 77 states and 95 transitions. [2024-09-12 15:37:14,665 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:14,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 95 transitions. [2024-09-12 15:37:14,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:37:14,666 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:14,666 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:14,678 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-12 15:37:14,867 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-12 15:37:14,867 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:14,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:14,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1445540013, now seen corresponding path program 6 times [2024-09-12 15:37:14,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:14,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252169847] [2024-09-12 15:37:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:14,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:14,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:14,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:14,987 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 18 [2024-09-12 15:37:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:15,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252169847] [2024-09-12 15:37:15,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252169847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:15,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626473297] [2024-09-12 15:37:15,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:15,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:15,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:15,077 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) [2024-09-12 15:37:15,078 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-12 15:37:15,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-12 15:37:15,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:15,123 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:37:15,124 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:15,227 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:15,227 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:15,417 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:15,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1626473297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:15,418 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:15,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-12 15:37:15,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970958341] [2024-09-12 15:37:15,418 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:15,418 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:37:15,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:15,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:37:15,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:37:15,419 INFO L87 Difference]: Start difference. First operand 77 states and 95 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:15,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:15,540 INFO L93 Difference]: Finished difference Result 97 states and 117 transitions. [2024-09-12 15:37:15,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:15,541 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-12 15:37:15,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:15,542 INFO L225 Difference]: With dead ends: 97 [2024-09-12 15:37:15,542 INFO L226 Difference]: Without dead ends: 84 [2024-09-12 15:37:15,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:37:15,543 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 226 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:15,543 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 413 Invalid, 227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 226 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:15,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-12 15:37:15,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2024-09-12 15:37:15,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 62 states have (on average 1.2741935483870968) internal successors, (79), 68 states have internal predecessors, (79), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (11), 6 states have call predecessors, (11), 6 states have call successors, (11) [2024-09-12 15:37:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2024-09-12 15:37:15,551 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 36 [2024-09-12 15:37:15,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:15,551 INFO L474 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2024-09-12 15:37:15,551 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:15,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:15,551 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2024-09-12 15:37:15,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:37:15,552 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:15,552 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:15,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-12 15:37:15,756 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-12 15:37:15,757 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:15,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:15,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1200674140, now seen corresponding path program 7 times [2024-09-12 15:37:15,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:15,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186247107] [2024-09-12 15:37:15,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:15,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:15,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:15,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,839 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:37:15,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:15,983 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:15,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186247107] [2024-09-12 15:37:15,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186247107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:15,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176723133] [2024-09-12 15:37:15,984 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:15,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:15,984 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:15,986 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) [2024-09-12 15:37:15,987 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-12 15:37:16,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:16,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:37:16,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:16,148 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:16,148 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:16,234 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:16,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [176723133] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:16,235 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:16,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 26 [2024-09-12 15:37:16,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513233902] [2024-09-12 15:37:16,235 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:16,235 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:37:16,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:16,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:37:16,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=591, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:37:16,236 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:16,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:16,463 INFO L93 Difference]: Finished difference Result 122 states and 155 transitions. [2024-09-12 15:37:16,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:37:16,463 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2024-09-12 15:37:16,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:16,464 INFO L225 Difference]: With dead ends: 122 [2024-09-12 15:37:16,465 INFO L226 Difference]: Without dead ends: 116 [2024-09-12 15:37:16,465 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=85, Invalid=907, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:16,466 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 28 mSDsluCounter, 591 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:16,466 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [32 Valid, 623 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:16,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-12 15:37:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 108. [2024-09-12 15:37:16,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 84 states have (on average 1.2738095238095237) internal successors, (107), 94 states have internal predecessors, (107), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (19), 8 states have call predecessors, (19), 8 states have call successors, (19) [2024-09-12 15:37:16,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 136 transitions. [2024-09-12 15:37:16,476 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 136 transitions. Word has length 36 [2024-09-12 15:37:16,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:16,476 INFO L474 AbstractCegarLoop]: Abstraction has 108 states and 136 transitions. [2024-09-12 15:37:16,476 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 21 states have internal predecessors, (35), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:16,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:16,477 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 136 transitions. [2024-09-12 15:37:16,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-12 15:37:16,477 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:16,477 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:16,490 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:16,681 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-12 15:37:16,682 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:16,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:16,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1664629901, now seen corresponding path program 8 times [2024-09-12 15:37:16,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:16,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089968701] [2024-09-12 15:37:16,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:16,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:16,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:16,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:16,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:16,720 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:16,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:16,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:16,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:16,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:16,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089968701] [2024-09-12 15:37:16,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089968701] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:16,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415857141] [2024-09-12 15:37:16,833 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:16,833 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:16,833 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:16,835 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) [2024-09-12 15:37:16,836 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-12 15:37:16,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:16,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:16,875 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:37:16,876 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:16,972 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:16,972 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:17,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415857141] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:17,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 20 [2024-09-12 15:37:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204667204] [2024-09-12 15:37:17,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:17,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:37:17,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:17,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:37:17,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:37:17,142 INFO L87 Difference]: Start difference. First operand 108 states and 136 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:17,261 INFO L93 Difference]: Finished difference Result 118 states and 145 transitions. [2024-09-12 15:37:17,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 36 [2024-09-12 15:37:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:17,262 INFO L225 Difference]: With dead ends: 118 [2024-09-12 15:37:17,262 INFO L226 Difference]: Without dead ends: 107 [2024-09-12 15:37:17,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 66 SyntacticMatches, 3 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:37:17,263 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 14 mSDsluCounter, 339 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:17,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 371 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:17,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2024-09-12 15:37:17,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 105. [2024-09-12 15:37:17,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 81 states have (on average 1.271604938271605) internal successors, (103), 91 states have internal predecessors, (103), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (16), 8 states have call predecessors, (16), 8 states have call successors, (16) [2024-09-12 15:37:17,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 129 transitions. [2024-09-12 15:37:17,273 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 129 transitions. Word has length 36 [2024-09-12 15:37:17,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:17,273 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 129 transitions. [2024-09-12 15:37:17,273 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:17,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:17,274 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 129 transitions. [2024-09-12 15:37:17,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:37:17,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:17,275 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:17,290 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-12 15:37:17,478 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:17,479 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:17,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:17,479 INFO L85 PathProgramCache]: Analyzing trace with hash -381188357, now seen corresponding path program 9 times [2024-09-12 15:37:17,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:17,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004903519] [2024-09-12 15:37:17,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:17,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:17,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:17,546 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:17,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:17,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:17,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:17,607 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:37:17,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:17,682 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:17,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004903519] [2024-09-12 15:37:17,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004903519] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:17,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843667552] [2024-09-12 15:37:17,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:17,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:17,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:17,685 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) [2024-09-12 15:37:17,686 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-12 15:37:17,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:37:17,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:17,732 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:37:17,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:17,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843667552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:18,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:18,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-12 15:37:18,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640611758] [2024-09-12 15:37:18,139 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:18,139 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:37:18,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:18,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:37:18,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:37:18,140 INFO L87 Difference]: Start difference. First operand 105 states and 129 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:18,336 INFO L93 Difference]: Finished difference Result 121 states and 150 transitions. [2024-09-12 15:37:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:18,337 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-12 15:37:18,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:18,337 INFO L225 Difference]: With dead ends: 121 [2024-09-12 15:37:18,338 INFO L226 Difference]: Without dead ends: 108 [2024-09-12 15:37:18,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:37:18,338 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 349 mSDsCounter, 0 mSdLazyCounter, 303 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 376 SdHoareTripleChecker+Invalid, 306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:18,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 376 Invalid, 306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 303 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:18,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-09-12 15:37:18,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2024-09-12 15:37:18,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 76 states have (on average 1.2894736842105263) internal successors, (98), 86 states have internal predecessors, (98), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (17), 8 states have call predecessors, (17), 8 states have call successors, (17) [2024-09-12 15:37:18,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 125 transitions. [2024-09-12 15:37:18,354 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 125 transitions. Word has length 37 [2024-09-12 15:37:18,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:18,354 INFO L474 AbstractCegarLoop]: Abstraction has 100 states and 125 transitions. [2024-09-12 15:37:18,354 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:18,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:18,354 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 125 transitions. [2024-09-12 15:37:18,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:37:18,355 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:18,355 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:18,366 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:18,555 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:18,556 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:18,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:18,556 INFO L85 PathProgramCache]: Analyzing trace with hash -956103598, now seen corresponding path program 10 times [2024-09-12 15:37:18,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:18,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070496568] [2024-09-12 15:37:18,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:18,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:18,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:18,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:18,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:18,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:18,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:18,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:18,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:18,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070496568] [2024-09-12 15:37:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070496568] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:18,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516519266] [2024-09-12 15:37:18,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:18,721 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:18,721 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:18,722 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) [2024-09-12 15:37:18,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-12 15:37:18,762 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:18,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:18,763 INFO L262 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:37:18,764 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:18,892 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:18,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:19,137 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:19,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [516519266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:19,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:19,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 11] total 24 [2024-09-12 15:37:19,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862667718] [2024-09-12 15:37:19,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:19,138 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:37:19,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:19,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:37:19,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:37:19,139 INFO L87 Difference]: Start difference. First operand 100 states and 125 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:19,326 INFO L93 Difference]: Finished difference Result 114 states and 139 transitions. [2024-09-12 15:37:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-09-12 15:37:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:19,328 INFO L225 Difference]: With dead ends: 114 [2024-09-12 15:37:19,328 INFO L226 Difference]: Without dead ends: 103 [2024-09-12 15:37:19,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=92, Invalid=610, Unknown=0, NotChecked=0, Total=702 [2024-09-12 15:37:19,329 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 380 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 286 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:19,329 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 412 Invalid, 286 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:19,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-12 15:37:19,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 101. [2024-09-12 15:37:19,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 77 states have (on average 1.2857142857142858) internal successors, (99), 87 states have internal predecessors, (99), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 15:37:19,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 124 transitions. [2024-09-12 15:37:19,342 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 124 transitions. Word has length 37 [2024-09-12 15:37:19,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:19,342 INFO L474 AbstractCegarLoop]: Abstraction has 101 states and 124 transitions. [2024-09-12 15:37:19,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:19,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:19,342 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 124 transitions. [2024-09-12 15:37:19,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:37:19,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:19,343 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:19,355 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:19,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:19,547 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:19,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:19,548 INFO L85 PathProgramCache]: Analyzing trace with hash -503145867, now seen corresponding path program 11 times [2024-09-12 15:37:19,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:19,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286320195] [2024-09-12 15:37:19,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:19,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:19,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:19,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:19,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:19,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:19,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286320195] [2024-09-12 15:37:19,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1286320195] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:19,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119229485] [2024-09-12 15:37:19,597 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:19,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:19,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:19,598 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) [2024-09-12 15:37:19,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-12 15:37:19,644 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:19,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:19,644 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:37:19,645 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:19,666 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:19,667 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:19,693 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:19,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119229485] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:19,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:19,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-12 15:37:19,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531648843] [2024-09-12 15:37:19,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:19,694 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:37:19,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:19,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:37:19,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:37:19,695 INFO L87 Difference]: Start difference. First operand 101 states and 124 transitions. Second operand has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:19,738 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2024-09-12 15:37:19,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:37:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 37 [2024-09-12 15:37:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:19,739 INFO L225 Difference]: With dead ends: 110 [2024-09-12 15:37:19,739 INFO L226 Difference]: Without dead ends: 98 [2024-09-12 15:37:19,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:37:19,739 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 16 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:19,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 146 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:19,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-12 15:37:19,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 88. [2024-09-12 15:37:19,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 76 states have internal predecessors, (88), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 15:37:19,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 105 transitions. [2024-09-12 15:37:19,750 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 105 transitions. Word has length 37 [2024-09-12 15:37:19,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:19,751 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 105 transitions. [2024-09-12 15:37:19,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.3333333333333335) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:19,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:19,751 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 105 transitions. [2024-09-12 15:37:19,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-12 15:37:19,751 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:19,752 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:19,763 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:19,955 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:19,955 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:19,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:19,956 INFO L85 PathProgramCache]: Analyzing trace with hash 567096122, now seen corresponding path program 12 times [2024-09-12 15:37:19,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:19,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016074003] [2024-09-12 15:37:19,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:19,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:19,999 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 19 [2024-09-12 15:37:20,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,003 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:20,003 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:20,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016074003] [2024-09-12 15:37:20,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016074003] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:20,003 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [822487996] [2024-09-12 15:37:20,004 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:20,004 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:20,004 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:20,005 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) [2024-09-12 15:37:20,006 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-12 15:37:20,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2024-09-12 15:37:20,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:20,049 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-12 15:37:20,050 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:20,072 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:20,072 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:20,098 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [822487996] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:20,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 9 [2024-09-12 15:37:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109081315] [2024-09-12 15:37:20,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:20,099 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-12 15:37:20,099 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:20,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-12 15:37:20,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2024-09-12 15:37:20,100 INFO L87 Difference]: Start difference. First operand 88 states and 105 transitions. Second operand has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:20,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:20,136 INFO L93 Difference]: Finished difference Result 144 states and 171 transitions. [2024-09-12 15:37:20,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-12 15:37:20,137 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 37 [2024-09-12 15:37:20,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:20,137 INFO L225 Difference]: With dead ends: 144 [2024-09-12 15:37:20,138 INFO L226 Difference]: Without dead ends: 91 [2024-09-12 15:37:20,139 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 74 SyntacticMatches, 5 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=54, Unknown=0, NotChecked=0, Total=90 [2024-09-12 15:37:20,139 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 8 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:20,140 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 136 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:20,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2024-09-12 15:37:20,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2024-09-12 15:37:20,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 73 states have (on average 1.2465753424657535) internal successors, (91), 79 states have internal predecessors, (91), 8 states have call successors, (8), 5 states have call predecessors, (8), 9 states have return successors, (9), 6 states have call predecessors, (9), 6 states have call successors, (9) [2024-09-12 15:37:20,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 108 transitions. [2024-09-12 15:37:20,151 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 108 transitions. Word has length 37 [2024-09-12 15:37:20,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:20,151 INFO L474 AbstractCegarLoop]: Abstraction has 91 states and 108 transitions. [2024-09-12 15:37:20,151 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.333333333333333) internal successors, (39), 9 states have internal predecessors, (39), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:20,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:20,152 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 108 transitions. [2024-09-12 15:37:20,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 15:37:20,153 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:20,153 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:20,164 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-12 15:37:20,353 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-12 15:37:20,353 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:20,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:20,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1478178501, now seen corresponding path program 13 times [2024-09-12 15:37:20,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:20,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031138662] [2024-09-12 15:37:20,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:20,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:20,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:20,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:20,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,610 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:20,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031138662] [2024-09-12 15:37:20,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031138662] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:20,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107319932] [2024-09-12 15:37:20,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:20,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:20,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:20,612 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) [2024-09-12 15:37:20,613 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-12 15:37:20,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:20,655 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:37:20,656 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:20,784 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:20,785 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:20,882 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:20,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107319932] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:20,882 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:20,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 28 [2024-09-12 15:37:20,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258193519] [2024-09-12 15:37:20,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:20,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 15:37:20,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:20,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 15:37:20,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=693, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:37:20,884 INFO L87 Difference]: Start difference. First operand 91 states and 108 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:21,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:21,161 INFO L93 Difference]: Finished difference Result 127 states and 151 transitions. [2024-09-12 15:37:21,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:37:21,161 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-12 15:37:21,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:21,163 INFO L225 Difference]: With dead ends: 127 [2024-09-12 15:37:21,163 INFO L226 Difference]: Without dead ends: 121 [2024-09-12 15:37:21,163 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=89, Invalid=1033, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:37:21,164 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 37 mSDsluCounter, 917 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 960 SdHoareTripleChecker+Invalid, 650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:21,164 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 960 Invalid, 650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:21,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2024-09-12 15:37:21,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 105. [2024-09-12 15:37:21,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 84 states have (on average 1.2380952380952381) internal successors, (104), 92 states have internal predecessors, (104), 9 states have call successors, (9), 5 states have call predecessors, (9), 11 states have return successors, (12), 7 states have call predecessors, (12), 7 states have call successors, (12) [2024-09-12 15:37:21,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 125 transitions. [2024-09-12 15:37:21,177 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 125 transitions. Word has length 38 [2024-09-12 15:37:21,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:21,177 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 125 transitions. [2024-09-12 15:37:21,177 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:21,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:21,177 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 125 transitions. [2024-09-12 15:37:21,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-12 15:37:21,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:21,178 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:21,190 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-12 15:37:21,381 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:21,382 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:21,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1583594271, now seen corresponding path program 14 times [2024-09-12 15:37:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942589482] [2024-09-12 15:37:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:21,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:21,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:21,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:21,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:21,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:21,517 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:21,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:21,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942589482] [2024-09-12 15:37:21,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942589482] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:21,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459790651] [2024-09-12 15:37:21,605 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:21,606 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:21,606 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:21,608 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) [2024-09-12 15:37:21,608 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-12 15:37:21,652 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:21,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:21,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-12 15:37:21,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:21,803 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:21,803 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:21,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459790651] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:21,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 28 [2024-09-12 15:37:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905431418] [2024-09-12 15:37:21,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:21,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-12 15:37:21,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:21,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-12 15:37:21,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=689, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:37:21,893 INFO L87 Difference]: Start difference. First operand 105 states and 125 transitions. Second operand has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:22,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:22,092 INFO L93 Difference]: Finished difference Result 121 states and 144 transitions. [2024-09-12 15:37:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:37:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 38 [2024-09-12 15:37:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:22,093 INFO L225 Difference]: With dead ends: 121 [2024-09-12 15:37:22,093 INFO L226 Difference]: Without dead ends: 115 [2024-09-12 15:37:22,094 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=1029, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:37:22,094 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 527 SdHoareTripleChecker+Invalid, 378 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:22,094 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 527 Invalid, 378 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 377 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:22,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2024-09-12 15:37:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 113. [2024-09-12 15:37:22,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 89 states have (on average 1.247191011235955) internal successors, (111), 99 states have internal predecessors, (111), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 15:37:22,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 136 transitions. [2024-09-12 15:37:22,108 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 136 transitions. Word has length 38 [2024-09-12 15:37:22,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:22,108 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 136 transitions. [2024-09-12 15:37:22,108 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 23 states have (on average 1.608695652173913) internal successors, (37), 23 states have internal predecessors, (37), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:22,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:22,109 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 136 transitions. [2024-09-12 15:37:22,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:37:22,109 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:22,109 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:22,121 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-12 15:37:22,309 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-12 15:37:22,310 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:22,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:22,310 INFO L85 PathProgramCache]: Analyzing trace with hash -368487758, now seen corresponding path program 15 times [2024-09-12 15:37:22,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:22,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966551015] [2024-09-12 15:37:22,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:22,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:22,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:22,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:22,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:22,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:22,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:22,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:22,513 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:22,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966551015] [2024-09-12 15:37:22,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966551015] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:22,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2039615938] [2024-09-12 15:37:22,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:22,514 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:22,514 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:22,515 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) [2024-09-12 15:37:22,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-12 15:37:22,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:37:22,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:22,557 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:37:22,558 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:22,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:22,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:23,008 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:23,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2039615938] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:23,009 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:23,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-12 15:37:23,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498192256] [2024-09-12 15:37:23,009 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:23,009 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:37:23,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:23,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:37:23,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:37:23,010 INFO L87 Difference]: Start difference. First operand 113 states and 136 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:23,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:23,282 INFO L93 Difference]: Finished difference Result 137 states and 165 transitions. [2024-09-12 15:37:23,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:37:23,282 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-12 15:37:23,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:23,283 INFO L225 Difference]: With dead ends: 137 [2024-09-12 15:37:23,283 INFO L226 Difference]: Without dead ends: 124 [2024-09-12 15:37:23,284 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:37:23,284 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 455 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 482 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:23,284 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 482 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:23,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2024-09-12 15:37:23,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 116. [2024-09-12 15:37:23,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 92 states have (on average 1.2608695652173914) internal successors, (116), 102 states have internal predecessors, (116), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (15), 8 states have call predecessors, (15), 8 states have call successors, (15) [2024-09-12 15:37:23,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 141 transitions. [2024-09-12 15:37:23,299 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 141 transitions. Word has length 39 [2024-09-12 15:37:23,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:23,299 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 141 transitions. [2024-09-12 15:37:23,299 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:23,299 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:23,300 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 141 transitions. [2024-09-12 15:37:23,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:37:23,300 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:23,300 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:23,312 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:23,501 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-12 15:37:23,501 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:23,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:23,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1010991045, now seen corresponding path program 16 times [2024-09-12 15:37:23,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:23,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607372535] [2024-09-12 15:37:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:23,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:23,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:23,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:23,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:23,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:23,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:23,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:23,691 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:23,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607372535] [2024-09-12 15:37:23,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607372535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:23,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [806565010] [2024-09-12 15:37:23,692 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:23,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:23,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:23,693 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) [2024-09-12 15:37:23,694 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-12 15:37:23,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:23,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:23,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:37:23,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:23,868 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:23,868 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [806565010] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:24,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 13] total 30 [2024-09-12 15:37:24,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98945160] [2024-09-12 15:37:24,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:24,141 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:37:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:24,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:37:24,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:37:24,142 INFO L87 Difference]: Start difference. First operand 116 states and 141 transitions. Second operand has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:24,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:24,416 INFO L93 Difference]: Finished difference Result 130 states and 155 transitions. [2024-09-12 15:37:24,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:37:24,417 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 39 [2024-09-12 15:37:24,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:24,418 INFO L225 Difference]: With dead ends: 130 [2024-09-12 15:37:24,419 INFO L226 Difference]: Without dead ends: 119 [2024-09-12 15:37:24,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=1062, Unknown=0, NotChecked=0, Total=1190 [2024-09-12 15:37:24,420 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:24,420 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 479 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:24,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-09-12 15:37:24,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 117. [2024-09-12 15:37:24,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 93 states have (on average 1.2580645161290323) internal successors, (117), 103 states have internal predecessors, (117), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-12 15:37:24,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 141 transitions. [2024-09-12 15:37:24,446 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 141 transitions. Word has length 39 [2024-09-12 15:37:24,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:24,446 INFO L474 AbstractCegarLoop]: Abstraction has 117 states and 141 transitions. [2024-09-12 15:37:24,446 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.0) internal successors, (60), 30 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:24,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:24,446 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 141 transitions. [2024-09-12 15:37:24,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:37:24,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:24,447 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:24,459 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:24,647 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:24,648 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:24,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:24,648 INFO L85 PathProgramCache]: Analyzing trace with hash 464480282, now seen corresponding path program 17 times [2024-09-12 15:37:24,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:24,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136325387] [2024-09-12 15:37:24,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:24,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:24,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:24,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:24,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:24,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:24,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:24,700 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:24,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:24,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:24,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136325387] [2024-09-12 15:37:24,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136325387] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:24,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [550284538] [2024-09-12 15:37:24,703 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:24,704 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:24,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:24,705 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) [2024-09-12 15:37:24,706 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-12 15:37:24,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:37:24,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:24,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:37:24,754 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:24,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:24,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:24,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [550284538] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:24,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:24,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-12 15:37:24,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717768881] [2024-09-12 15:37:24,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:24,812 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:37:24,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:24,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:37:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:37:24,814 INFO L87 Difference]: Start difference. First operand 117 states and 141 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:24,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:24,866 INFO L93 Difference]: Finished difference Result 211 states and 258 transitions. [2024-09-12 15:37:24,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:24,866 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 39 [2024-09-12 15:37:24,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:24,867 INFO L225 Difference]: With dead ends: 211 [2024-09-12 15:37:24,867 INFO L226 Difference]: Without dead ends: 139 [2024-09-12 15:37:24,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:37:24,868 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 68 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 68 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:24,868 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 196 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 68 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:24,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-12 15:37:24,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 139. [2024-09-12 15:37:24,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 115 states have (on average 1.2521739130434784) internal successors, (144), 125 states have internal predecessors, (144), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-12 15:37:24,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 168 transitions. [2024-09-12 15:37:24,890 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 168 transitions. Word has length 39 [2024-09-12 15:37:24,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:24,890 INFO L474 AbstractCegarLoop]: Abstraction has 139 states and 168 transitions. [2024-09-12 15:37:24,891 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:24,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:24,891 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 168 transitions. [2024-09-12 15:37:24,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-12 15:37:24,891 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:24,892 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:24,904 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-12 15:37:25,095 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-12 15:37:25,096 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:25,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:25,096 INFO L85 PathProgramCache]: Analyzing trace with hash -717756427, now seen corresponding path program 18 times [2024-09-12 15:37:25,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:25,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290967003] [2024-09-12 15:37:25,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:25,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:25,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:25,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,116 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:25,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,148 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:25,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:25,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290967003] [2024-09-12 15:37:25,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290967003] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:25,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118805866] [2024-09-12 15:37:25,149 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:25,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:25,149 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:25,150 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) [2024-09-12 15:37:25,151 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-12 15:37:25,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 15:37:25,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:25,194 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-12 15:37:25,194 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:25,221 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:25,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:25,243 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-12 15:37:25,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118805866] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:25,243 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:25,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 11 [2024-09-12 15:37:25,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010874529] [2024-09-12 15:37:25,243 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:25,243 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-12 15:37:25,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:25,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-12 15:37:25,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-09-12 15:37:25,244 INFO L87 Difference]: Start difference. First operand 139 states and 168 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:25,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:25,290 INFO L93 Difference]: Finished difference Result 179 states and 221 transitions. [2024-09-12 15:37:25,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-12 15:37:25,290 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-09-12 15:37:25,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:25,291 INFO L225 Difference]: With dead ends: 179 [2024-09-12 15:37:25,291 INFO L226 Difference]: Without dead ends: 161 [2024-09-12 15:37:25,292 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 77 SyntacticMatches, 5 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2024-09-12 15:37:25,292 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 5 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:25,292 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 148 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:25,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2024-09-12 15:37:25,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2024-09-12 15:37:25,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 137 states have (on average 1.2481751824817517) internal successors, (171), 147 states have internal predecessors, (171), 10 states have call successors, (10), 5 states have call predecessors, (10), 13 states have return successors, (14), 8 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-12 15:37:25,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 195 transitions. [2024-09-12 15:37:25,318 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 195 transitions. Word has length 39 [2024-09-12 15:37:25,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:25,318 INFO L474 AbstractCegarLoop]: Abstraction has 161 states and 195 transitions. [2024-09-12 15:37:25,318 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 11 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:25,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:25,318 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 195 transitions. [2024-09-12 15:37:25,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:37:25,319 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:25,319 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:25,334 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-12 15:37:25,520 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-12 15:37:25,520 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:25,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:25,520 INFO L85 PathProgramCache]: Analyzing trace with hash -223332356, now seen corresponding path program 19 times [2024-09-12 15:37:25,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:25,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155548868] [2024-09-12 15:37:25,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:25,521 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:25,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,782 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:25,782 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:25,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155548868] [2024-09-12 15:37:25,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155548868] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:25,782 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508689241] [2024-09-12 15:37:25,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:25,782 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:25,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:25,783 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) [2024-09-12 15:37:25,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-12 15:37:25,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:25,827 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:37:25,828 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:25,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:25,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:26,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508689241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:26,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:26,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 30 [2024-09-12 15:37:26,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10519668] [2024-09-12 15:37:26,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:26,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:37:26,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:26,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:37:26,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=803, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:37:26,024 INFO L87 Difference]: Start difference. First operand 161 states and 195 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:26,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:26,327 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-12 15:37:26,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:37:26,328 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-12 15:37:26,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:26,329 INFO L225 Difference]: With dead ends: 207 [2024-09-12 15:37:26,329 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 15:37:26,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:26,331 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1208 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 1258 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:26,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 1258 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:26,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 15:37:26,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 175. [2024-09-12 15:37:26,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 148 states have (on average 1.2432432432432432) internal successors, (184), 160 states have internal predecessors, (184), 11 states have call successors, (11), 5 states have call predecessors, (11), 15 states have return successors, (17), 9 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-12 15:37:26,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 212 transitions. [2024-09-12 15:37:26,355 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 212 transitions. Word has length 40 [2024-09-12 15:37:26,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:26,355 INFO L474 AbstractCegarLoop]: Abstraction has 175 states and 212 transitions. [2024-09-12 15:37:26,356 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:26,356 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:26,356 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 212 transitions. [2024-09-12 15:37:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:37:26,357 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:26,357 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:26,368 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:26,560 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-12 15:37:26,560 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:26,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:26,561 INFO L85 PathProgramCache]: Analyzing trace with hash 796563891, now seen corresponding path program 20 times [2024-09-12 15:37:26,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:26,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1038808399] [2024-09-12 15:37:26,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:26,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:26,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:26,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:26,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:26,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:26,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 20 [2024-09-12 15:37:26,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:26,746 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 15:37:26,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1038808399] [2024-09-12 15:37:26,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1038808399] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:26,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038136747] [2024-09-12 15:37:26,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:26,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:26,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:26,749 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) [2024-09-12 15:37:26,750 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-12 15:37:26,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:26,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:26,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:37:26,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:26,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 15:37:26,924 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:27,130 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 15:37:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038136747] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:27,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:27,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-12 15:37:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518844825] [2024-09-12 15:37:27,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:27,131 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:37:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:37:27,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:37:27,132 INFO L87 Difference]: Start difference. First operand 175 states and 212 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:27,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:27,297 INFO L93 Difference]: Finished difference Result 207 states and 250 transitions. [2024-09-12 15:37:27,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:27,298 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-12 15:37:27,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:27,300 INFO L225 Difference]: With dead ends: 207 [2024-09-12 15:37:27,300 INFO L226 Difference]: Without dead ends: 193 [2024-09-12 15:37:27,301 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:37:27,301 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 300 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 389 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 300 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:27,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 389 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 300 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:27,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-12 15:37:27,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 189. [2024-09-12 15:37:27,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 153 states have (on average 1.2287581699346406) internal successors, (188), 171 states have internal predecessors, (188), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-12 15:37:27,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 228 transitions. [2024-09-12 15:37:27,336 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 228 transitions. Word has length 40 [2024-09-12 15:37:27,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:27,336 INFO L474 AbstractCegarLoop]: Abstraction has 189 states and 228 transitions. [2024-09-12 15:37:27,336 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:27,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:27,336 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 228 transitions. [2024-09-12 15:37:27,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:37:27,337 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:27,337 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:27,350 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-12 15:37:27,541 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:27,541 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:27,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1988964868, now seen corresponding path program 21 times [2024-09-12 15:37:27,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:27,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [232117973] [2024-09-12 15:37:27,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:27,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:27,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:27,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:27,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:27,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:27,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:27,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:27,797 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:27,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [232117973] [2024-09-12 15:37:27,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [232117973] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:27,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071131341] [2024-09-12 15:37:27,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:27,798 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:27,798 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:27,799 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) [2024-09-12 15:37:27,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-12 15:37:27,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-12 15:37:27,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:27,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:37:27,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:27,993 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:28,099 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:28,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071131341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:28,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:28,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 30 [2024-09-12 15:37:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614068334] [2024-09-12 15:37:28,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:28,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-12 15:37:28,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:28,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-12 15:37:28,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=799, Unknown=0, NotChecked=0, Total=870 [2024-09-12 15:37:28,101 INFO L87 Difference]: Start difference. First operand 189 states and 228 transitions. Second operand has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:28,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:28,360 INFO L93 Difference]: Finished difference Result 205 states and 248 transitions. [2024-09-12 15:37:28,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:37:28,360 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2024-09-12 15:37:28,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:28,362 INFO L225 Difference]: With dead ends: 205 [2024-09-12 15:37:28,362 INFO L226 Difference]: Without dead ends: 191 [2024-09-12 15:37:28,363 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:28,363 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 760 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 796 SdHoareTripleChecker+Invalid, 581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:28,363 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 796 Invalid, 581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:28,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2024-09-12 15:37:28,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 187. [2024-09-12 15:37:28,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 151 states have (on average 1.2384105960264902) internal successors, (187), 169 states have internal predecessors, (187), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (26), 12 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-12 15:37:28,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 227 transitions. [2024-09-12 15:37:28,398 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 227 transitions. Word has length 40 [2024-09-12 15:37:28,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:28,398 INFO L474 AbstractCegarLoop]: Abstraction has 187 states and 227 transitions. [2024-09-12 15:37:28,398 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 25 states have (on average 1.56) internal successors, (39), 25 states have internal predecessors, (39), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:28,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:28,398 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 227 transitions. [2024-09-12 15:37:28,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-12 15:37:28,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:28,399 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:28,411 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-12 15:37:28,600 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:28,600 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:28,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:28,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1164125907, now seen corresponding path program 22 times [2024-09-12 15:37:28,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:28,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282501414] [2024-09-12 15:37:28,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:28,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:28,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:28,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:28,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:28,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:28,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:28,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-12 15:37:28,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282501414] [2024-09-12 15:37:28,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282501414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:28,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250362857] [2024-09-12 15:37:28,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:28,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:28,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:28,791 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) [2024-09-12 15:37:28,791 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-12 15:37:28,833 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:28,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:28,834 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:37:28,835 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 15:37:28,928 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:29,142 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-12 15:37:29,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250362857] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:29,142 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:29,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 11] total 26 [2024-09-12 15:37:29,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783575528] [2024-09-12 15:37:29,142 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:29,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:37:29,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:29,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:37:29,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=564, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:37:29,143 INFO L87 Difference]: Start difference. First operand 187 states and 227 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:29,351 INFO L93 Difference]: Finished difference Result 199 states and 238 transitions. [2024-09-12 15:37:29,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:29,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 40 [2024-09-12 15:37:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:29,353 INFO L225 Difference]: With dead ends: 199 [2024-09-12 15:37:29,353 INFO L226 Difference]: Without dead ends: 181 [2024-09-12 15:37:29,354 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-12 15:37:29,354 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 317 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 403 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 317 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:29,354 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 403 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 317 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-12 15:37:29,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2024-09-12 15:37:29,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 143 states have (on average 1.2377622377622377) internal successors, (177), 161 states have internal predecessors, (177), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (24), 12 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-12 15:37:29,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 215 transitions. [2024-09-12 15:37:29,382 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 215 transitions. Word has length 40 [2024-09-12 15:37:29,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:29,382 INFO L474 AbstractCegarLoop]: Abstraction has 179 states and 215 transitions. [2024-09-12 15:37:29,382 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:29,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:29,382 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 215 transitions. [2024-09-12 15:37:29,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:37:29,383 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:29,383 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:29,394 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2024-09-12 15:37:29,587 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2024-09-12 15:37:29,587 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:29,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:29,588 INFO L85 PathProgramCache]: Analyzing trace with hash -1575716773, now seen corresponding path program 23 times [2024-09-12 15:37:29,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:29,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747686193] [2024-09-12 15:37:29,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:29,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:29,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:29,628 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:29,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:29,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:29,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:29,812 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:29,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747686193] [2024-09-12 15:37:29,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747686193] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:29,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319765229] [2024-09-12 15:37:29,813 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:29,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:29,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:29,814 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) [2024-09-12 15:37:29,815 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-12 15:37:29,863 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:37:29,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:29,864 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:37:29,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:30,092 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:30,093 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:30,447 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:30,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319765229] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:30,447 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:30,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-12 15:37:30,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333323296] [2024-09-12 15:37:30,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:30,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:30,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:30,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:30,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:30,448 INFO L87 Difference]: Start difference. First operand 179 states and 215 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:30,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:30,842 INFO L93 Difference]: Finished difference Result 219 states and 264 transitions. [2024-09-12 15:37:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:37:30,843 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-12 15:37:30,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:30,844 INFO L225 Difference]: With dead ends: 219 [2024-09-12 15:37:30,844 INFO L226 Difference]: Without dead ends: 206 [2024-09-12 15:37:30,845 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:37:30,845 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 480 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:30,845 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 507 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:30,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-09-12 15:37:30,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 198. [2024-09-12 15:37:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 159 states have (on average 1.2389937106918238) internal successors, (197), 179 states have internal predecessors, (197), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (27), 13 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-12 15:37:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 239 transitions. [2024-09-12 15:37:30,882 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 239 transitions. Word has length 41 [2024-09-12 15:37:30,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:30,882 INFO L474 AbstractCegarLoop]: Abstraction has 198 states and 239 transitions. [2024-09-12 15:37:30,883 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:30,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:30,883 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 239 transitions. [2024-09-12 15:37:30,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:37:30,884 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:30,885 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:30,896 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:31,085 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-12 15:37:31,085 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:31,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:31,085 INFO L85 PathProgramCache]: Analyzing trace with hash -18482190, now seen corresponding path program 24 times [2024-09-12 15:37:31,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:31,086 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821081331] [2024-09-12 15:37:31,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:31,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:31,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:31,122 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:31,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:31,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:31,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:31,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:31,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:31,315 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:31,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821081331] [2024-09-12 15:37:31,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821081331] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:31,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754678949] [2024-09-12 15:37:31,315 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:31,315 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:31,315 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:31,317 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) [2024-09-12 15:37:31,318 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-12 15:37:31,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:37:31,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:31,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:37:31,365 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:31,546 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:31,546 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:31,889 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:31,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754678949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:31,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:31,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 36 [2024-09-12 15:37:31,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863457036] [2024-09-12 15:37:31,890 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:31,890 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:31,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:31,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:31,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1145, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:31,891 INFO L87 Difference]: Start difference. First operand 198 states and 239 transitions. Second operand has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:32,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:32,251 INFO L93 Difference]: Finished difference Result 212 states and 253 transitions. [2024-09-12 15:37:32,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:37:32,251 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-09-12 15:37:32,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:32,253 INFO L225 Difference]: With dead ends: 212 [2024-09-12 15:37:32,253 INFO L226 Difference]: Without dead ends: 201 [2024-09-12 15:37:32,254 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=166, Invalid=1640, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:37:32,254 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 558 SdHoareTripleChecker+Invalid, 537 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:32,255 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 558 Invalid, 537 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:32,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-09-12 15:37:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 199. [2024-09-12 15:37:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 160 states have (on average 1.2375) internal successors, (198), 180 states have internal predecessors, (198), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-12 15:37:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 238 transitions. [2024-09-12 15:37:32,300 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 238 transitions. Word has length 41 [2024-09-12 15:37:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:32,301 INFO L474 AbstractCegarLoop]: Abstraction has 199 states and 238 transitions. [2024-09-12 15:37:32,301 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.8333333333333333) internal successors, (66), 36 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:32,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 238 transitions. [2024-09-12 15:37:32,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:37:32,302 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:32,302 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:32,314 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:32,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-12 15:37:32,503 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:32,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:32,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1486012337, now seen corresponding path program 25 times [2024-09-12 15:37:32,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:32,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922576661] [2024-09-12 15:37:32,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:32,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:32,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:32,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:32,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:32,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:32,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:32,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:32,561 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:32,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922576661] [2024-09-12 15:37:32,561 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922576661] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:32,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901419431] [2024-09-12 15:37:32,562 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:32,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:32,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:32,563 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) [2024-09-12 15:37:32,564 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-12 15:37:32,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:32,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 15:37:32,614 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:32,646 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:32,646 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:32,676 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901419431] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:32,676 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:32,676 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-12 15:37:32,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173745193] [2024-09-12 15:37:32,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:32,677 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 15:37:32,677 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:32,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 15:37:32,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:37:32,677 INFO L87 Difference]: Start difference. First operand 199 states and 238 transitions. Second operand has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:32,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:32,737 INFO L93 Difference]: Finished difference Result 214 states and 255 transitions. [2024-09-12 15:37:32,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:32,737 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 41 [2024-09-12 15:37:32,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:32,738 INFO L225 Difference]: With dead ends: 214 [2024-09-12 15:37:32,738 INFO L226 Difference]: Without dead ends: 198 [2024-09-12 15:37:32,739 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:37:32,739 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 15 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:32,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 139 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:32,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-09-12 15:37:32,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 188. [2024-09-12 15:37:32,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 155 states have (on average 1.2193548387096773) internal successors, (189), 171 states have internal predecessors, (189), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-12 15:37:32,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 221 transitions. [2024-09-12 15:37:32,779 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 221 transitions. Word has length 41 [2024-09-12 15:37:32,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:32,779 INFO L474 AbstractCegarLoop]: Abstraction has 188 states and 221 transitions. [2024-09-12 15:37:32,779 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.75) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:32,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:32,779 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 221 transitions. [2024-09-12 15:37:32,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-12 15:37:32,780 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:32,780 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:32,795 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:32,980 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-12 15:37:32,981 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:32,981 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:32,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1010741786, now seen corresponding path program 26 times [2024-09-12 15:37:32,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:32,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543815513] [2024-09-12 15:37:32,981 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:32,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:33,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:33,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,038 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2024-09-12 15:37:33,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,041 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:33,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543815513] [2024-09-12 15:37:33,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543815513] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:33,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94831272] [2024-09-12 15:37:33,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:33,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:33,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:33,043 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) [2024-09-12 15:37:33,044 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-12 15:37:33,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:33,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:33,097 INFO L262 TraceCheckSpWp]: Trace formula consists of 192 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-12 15:37:33,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:33,129 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:33,129 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:33,166 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:33,167 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94831272] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:33,167 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:33,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 12 [2024-09-12 15:37:33,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434463186] [2024-09-12 15:37:33,167 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:33,167 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-12 15:37:33,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:33,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-12 15:37:33,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2024-09-12 15:37:33,168 INFO L87 Difference]: Start difference. First operand 188 states and 221 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:33,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:33,240 INFO L93 Difference]: Finished difference Result 300 states and 350 transitions. [2024-09-12 15:37:33,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-12 15:37:33,244 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 41 [2024-09-12 15:37:33,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:33,246 INFO L225 Difference]: With dead ends: 300 [2024-09-12 15:37:33,246 INFO L226 Difference]: Without dead ends: 193 [2024-09-12 15:37:33,247 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 79 SyntacticMatches, 7 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=130, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:37:33,247 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 25 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:33,247 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 155 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:33,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-12 15:37:33,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-12 15:37:33,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (19), 11 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-12 15:37:33,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 226 transitions. [2024-09-12 15:37:33,287 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 226 transitions. Word has length 41 [2024-09-12 15:37:33,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:33,287 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 226 transitions. [2024-09-12 15:37:33,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 12 states have internal predecessors, (42), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:33,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:33,288 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 226 transitions. [2024-09-12 15:37:33,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:37:33,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:33,289 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:33,300 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2024-09-12 15:37:33,489 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:33,489 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:33,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:33,490 INFO L85 PathProgramCache]: Analyzing trace with hash 479671077, now seen corresponding path program 27 times [2024-09-12 15:37:33,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:33,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119590572] [2024-09-12 15:37:33,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:33,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:33,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:33,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:33,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:33,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:33,801 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:33,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:33,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119590572] [2024-09-12 15:37:33,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119590572] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:33,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225020532] [2024-09-12 15:37:33,802 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:33,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:33,803 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:33,804 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) [2024-09-12 15:37:33,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-12 15:37:33,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:37:33,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:33,869 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:37:33,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:34,013 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:34,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:34,117 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:34,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225020532] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:34,117 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:34,118 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 32 [2024-09-12 15:37:34,118 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056062012] [2024-09-12 15:37:34,118 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:34,118 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:37:34,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:34,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:37:34,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=921, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:34,119 INFO L87 Difference]: Start difference. First operand 193 states and 226 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:34,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:34,456 INFO L93 Difference]: Finished difference Result 245 states and 287 transitions. [2024-09-12 15:37:34,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:37:34,456 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-12 15:37:34,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:34,458 INFO L225 Difference]: With dead ends: 245 [2024-09-12 15:37:34,458 INFO L226 Difference]: Without dead ends: 239 [2024-09-12 15:37:34,459 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:37:34,459 INFO L434 NwaCegarLoop]: 59 mSDtfsCounter, 57 mSDsluCounter, 1429 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 1488 SdHoareTripleChecker+Invalid, 1052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:34,459 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 1488 Invalid, 1052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1051 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:34,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2024-09-12 15:37:34,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 207. [2024-09-12 15:37:34,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 171 states have (on average 1.2105263157894737) internal successors, (207), 189 states have internal predecessors, (207), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (22), 12 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-12 15:37:34,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 243 transitions. [2024-09-12 15:37:34,502 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 243 transitions. Word has length 42 [2024-09-12 15:37:34,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:34,502 INFO L474 AbstractCegarLoop]: Abstraction has 207 states and 243 transitions. [2024-09-12 15:37:34,502 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:34,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:34,503 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 243 transitions. [2024-09-12 15:37:34,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:37:34,504 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:34,504 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:34,515 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:34,708 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2024-09-12 15:37:34,709 INFO L399 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:34,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:34,709 INFO L85 PathProgramCache]: Analyzing trace with hash -432732607, now seen corresponding path program 28 times [2024-09-12 15:37:34,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:34,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596914547] [2024-09-12 15:37:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:34,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:34,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:34,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:34,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:34,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:34,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:34,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:34,993 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:34,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596914547] [2024-09-12 15:37:34,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596914547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:34,993 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756699859] [2024-09-12 15:37:34,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:34,994 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:34,994 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:34,995 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) [2024-09-12 15:37:35,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-12 15:37:35,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:35,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:35,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:37:35,052 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:35,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:35,203 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756699859] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:35,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 32 [2024-09-12 15:37:35,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114424741] [2024-09-12 15:37:35,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:35,282 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:37:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:35,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:37:35,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=917, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:35,283 INFO L87 Difference]: Start difference. First operand 207 states and 243 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:35,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:35,548 INFO L93 Difference]: Finished difference Result 213 states and 248 transitions. [2024-09-12 15:37:35,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:37:35,548 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-12 15:37:35,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:35,549 INFO L225 Difference]: With dead ends: 213 [2024-09-12 15:37:35,549 INFO L226 Difference]: Without dead ends: 193 [2024-09-12 15:37:35,550 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:37:35,550 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1043 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1090 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:35,550 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1090 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:35,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-12 15:37:35,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 193. [2024-09-12 15:37:35,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 160 states have (on average 1.2125) internal successors, (194), 176 states have internal predecessors, (194), 13 states have call successors, (13), 5 states have call predecessors, (13), 19 states have return successors, (20), 11 states have call predecessors, (20), 11 states have call successors, (20) [2024-09-12 15:37:35,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 227 transitions. [2024-09-12 15:37:35,590 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 227 transitions. Word has length 42 [2024-09-12 15:37:35,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:35,591 INFO L474 AbstractCegarLoop]: Abstraction has 193 states and 227 transitions. [2024-09-12 15:37:35,591 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:35,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:35,591 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 227 transitions. [2024-09-12 15:37:35,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-12 15:37:35,592 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:35,592 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:35,604 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-12 15:37:35,792 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2024-09-12 15:37:35,792 INFO L399 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:35,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash -49232091, now seen corresponding path program 29 times [2024-09-12 15:37:35,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036529496] [2024-09-12 15:37:35,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:35,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:35,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:35,862 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:35,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:35,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:35,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:35,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:36,037 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:36,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036529496] [2024-09-12 15:37:36,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036529496] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:36,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239413094] [2024-09-12 15:37:36,037 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:36,037 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:36,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:36,039 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) [2024-09-12 15:37:36,040 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-12 15:37:36,095 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:37:36,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:36,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-12 15:37:36,097 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:36,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:36,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:36,373 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:36,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [239413094] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:36,374 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:36,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 32 [2024-09-12 15:37:36,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826889341] [2024-09-12 15:37:36,374 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:36,374 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:37:36,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:36,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:37:36,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=913, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:36,375 INFO L87 Difference]: Start difference. First operand 193 states and 227 transitions. Second operand has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:36,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:36,590 INFO L93 Difference]: Finished difference Result 209 states and 246 transitions. [2024-09-12 15:37:36,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:37:36,591 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 42 [2024-09-12 15:37:36,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:36,592 INFO L225 Difference]: With dead ends: 209 [2024-09-12 15:37:36,592 INFO L226 Difference]: Without dead ends: 203 [2024-09-12 15:37:36,593 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1301, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:37:36,593 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 681 mSDsCounter, 0 mSdLazyCounter, 551 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 709 SdHoareTripleChecker+Invalid, 552 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:36,593 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 709 Invalid, 552 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 551 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:36,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-12 15:37:36,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 201. [2024-09-12 15:37:36,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 165 states have (on average 1.2181818181818183) internal successors, (201), 183 states have internal predecessors, (201), 14 states have call successors, (14), 5 states have call predecessors, (14), 21 states have return successors, (23), 12 states have call predecessors, (23), 12 states have call successors, (23) [2024-09-12 15:37:36,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 238 transitions. [2024-09-12 15:37:36,640 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 238 transitions. Word has length 42 [2024-09-12 15:37:36,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:36,640 INFO L474 AbstractCegarLoop]: Abstraction has 201 states and 238 transitions. [2024-09-12 15:37:36,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 27 states have (on average 1.5185185185185186) internal successors, (41), 27 states have internal predecessors, (41), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:36,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:36,640 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 238 transitions. [2024-09-12 15:37:36,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:37:36,641 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:36,642 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:36,653 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:36,842 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2024-09-12 15:37:36,842 INFO L399 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:36,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:36,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1257446830, now seen corresponding path program 30 times [2024-09-12 15:37:36,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:36,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310964362] [2024-09-12 15:37:36,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:36,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:36,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:36,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:36,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:36,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:36,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:36,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:36,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:37,080 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:37,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310964362] [2024-09-12 15:37:37,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310964362] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:37,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430033225] [2024-09-12 15:37:37,080 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:37,080 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:37,080 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:37,081 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) [2024-09-12 15:37:37,082 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-12 15:37:37,128 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:37:37,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:37,129 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:37:37,130 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:37,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:37,779 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:37,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430033225] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:37,780 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:37,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-12 15:37:37,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182201598] [2024-09-12 15:37:37,780 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:37,780 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:37:37,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:37,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:37:37,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:37,781 INFO L87 Difference]: Start difference. First operand 201 states and 238 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:38,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:38,260 INFO L93 Difference]: Finished difference Result 243 states and 289 transitions. [2024-09-12 15:37:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:37:38,260 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-12 15:37:38,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:38,262 INFO L225 Difference]: With dead ends: 243 [2024-09-12 15:37:38,262 INFO L226 Difference]: Without dead ends: 230 [2024-09-12 15:37:38,263 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:37:38,263 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 560 SdHoareTripleChecker+Invalid, 717 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:38,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 560 Invalid, 717 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:38,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2024-09-12 15:37:38,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 222. [2024-09-12 15:37:38,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 183 states have (on average 1.2185792349726776) internal successors, (223), 203 states have internal predecessors, (223), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (26), 13 states have call predecessors, (26), 13 states have call successors, (26) [2024-09-12 15:37:38,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2024-09-12 15:37:38,307 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 43 [2024-09-12 15:37:38,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:38,308 INFO L474 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2024-09-12 15:37:38,308 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:38,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:38,308 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2024-09-12 15:37:38,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:37:38,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:38,309 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:38,321 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2024-09-12 15:37:38,509 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2024-09-12 15:37:38,509 INFO L399 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:38,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:38,510 INFO L85 PathProgramCache]: Analyzing trace with hash -227815013, now seen corresponding path program 31 times [2024-09-12 15:37:38,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:38,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777075345] [2024-09-12 15:37:38,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:38,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:38,550 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:38,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:38,551 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:38,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:38,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:38,753 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:38,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:38,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777075345] [2024-09-12 15:37:38,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777075345] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:38,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139755172] [2024-09-12 15:37:38,754 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:38,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:38,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:38,755 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) [2024-09-12 15:37:38,755 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-12 15:37:38,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:38,809 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:37:38,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:39,059 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:39,059 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:39,457 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:39,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139755172] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:39,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:39,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 17] total 42 [2024-09-12 15:37:39,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333391479] [2024-09-12 15:37:39,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:39,458 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:37:39,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:39,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:37:39,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1586, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:39,459 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:39,966 INFO L93 Difference]: Finished difference Result 236 states and 278 transitions. [2024-09-12 15:37:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:37:39,966 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 43 [2024-09-12 15:37:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:39,968 INFO L225 Difference]: With dead ends: 236 [2024-09-12 15:37:39,968 INFO L226 Difference]: Without dead ends: 225 [2024-09-12 15:37:39,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=206, Invalid=2344, Unknown=0, NotChecked=0, Total=2550 [2024-09-12 15:37:39,969 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 682 mSDsCounter, 0 mSdLazyCounter, 794 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 714 SdHoareTripleChecker+Invalid, 803 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:39,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 714 Invalid, 803 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 794 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2024-09-12 15:37:40,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 223. [2024-09-12 15:37:40,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 184 states have (on average 1.2173913043478262) internal successors, (224), 204 states have internal predecessors, (224), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-12 15:37:40,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 263 transitions. [2024-09-12 15:37:40,020 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 263 transitions. Word has length 43 [2024-09-12 15:37:40,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:40,021 INFO L474 AbstractCegarLoop]: Abstraction has 223 states and 263 transitions. [2024-09-12 15:37:40,021 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.7142857142857142) internal successors, (72), 42 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:40,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:40,021 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 263 transitions. [2024-09-12 15:37:40,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:37:40,022 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:40,022 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:40,033 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:40,222 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:40,222 INFO L399 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:40,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:40,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1451316090, now seen corresponding path program 32 times [2024-09-12 15:37:40,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:40,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695437420] [2024-09-12 15:37:40,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:40,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:40,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:40,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:40,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,285 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:40,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,288 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695437420] [2024-09-12 15:37:40,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695437420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:40,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255114076] [2024-09-12 15:37:40,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:40,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:40,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:40,290 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) [2024-09-12 15:37:40,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-12 15:37:40,340 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:40,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:40,340 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:37:40,341 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:40,376 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,376 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:40,406 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255114076] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:40,407 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:40,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-12 15:37:40,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108742389] [2024-09-12 15:37:40,407 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:40,407 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 15:37:40,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:40,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 15:37:40,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:37:40,407 INFO L87 Difference]: Start difference. First operand 223 states and 263 transitions. Second operand has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:40,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:40,505 INFO L93 Difference]: Finished difference Result 391 states and 465 transitions. [2024-09-12 15:37:40,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:37:40,505 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 43 [2024-09-12 15:37:40,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:40,507 INFO L225 Difference]: With dead ends: 391 [2024-09-12 15:37:40,507 INFO L226 Difference]: Without dead ends: 261 [2024-09-12 15:37:40,508 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:37:40,509 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 12 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:40,509 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 167 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:40,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2024-09-12 15:37:40,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 261. [2024-09-12 15:37:40,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 222 states have (on average 1.2117117117117118) internal successors, (269), 242 states have internal predecessors, (269), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-12 15:37:40,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 308 transitions. [2024-09-12 15:37:40,572 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 308 transitions. Word has length 43 [2024-09-12 15:37:40,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:40,573 INFO L474 AbstractCegarLoop]: Abstraction has 261 states and 308 transitions. [2024-09-12 15:37:40,573 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.2142857142857144) internal successors, (45), 14 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:40,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:40,573 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 308 transitions. [2024-09-12 15:37:40,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-12 15:37:40,574 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:40,574 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:40,585 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:40,774 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2024-09-12 15:37:40,775 INFO L399 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:40,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:40,775 INFO L85 PathProgramCache]: Analyzing trace with hash -397169103, now seen corresponding path program 33 times [2024-09-12 15:37:40,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:40,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785748417] [2024-09-12 15:37:40,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:40,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:40,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:40,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:40,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:40,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:40,838 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785748417] [2024-09-12 15:37:40,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785748417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:40,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326675780] [2024-09-12 15:37:40,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:40,839 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:40,839 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:40,840 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) [2024-09-12 15:37:40,841 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-12 15:37:40,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:37:40,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:40,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-09-12 15:37:40,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:40,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-12 15:37:40,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326675780] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:40,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:40,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 14 [2024-09-12 15:37:40,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040354290] [2024-09-12 15:37:40,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:40,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-12 15:37:40,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:40,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-12 15:37:40,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2024-09-12 15:37:40,980 INFO L87 Difference]: Start difference. First operand 261 states and 308 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:41,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:41,104 INFO L93 Difference]: Finished difference Result 323 states and 389 transitions. [2024-09-12 15:37:41,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-12 15:37:41,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 43 [2024-09-12 15:37:41,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:41,106 INFO L225 Difference]: With dead ends: 323 [2024-09-12 15:37:41,106 INFO L226 Difference]: Without dead ends: 299 [2024-09-12 15:37:41,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 82 SyntacticMatches, 7 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2024-09-12 15:37:41,108 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 10 mSDsluCounter, 74 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:41,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 106 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:41,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-12 15:37:41,169 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-12 15:37:41,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (24), 13 states have call predecessors, (24), 13 states have call successors, (24) [2024-09-12 15:37:41,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 353 transitions. [2024-09-12 15:37:41,171 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 353 transitions. Word has length 43 [2024-09-12 15:37:41,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:41,173 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 353 transitions. [2024-09-12 15:37:41,173 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:41,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:41,173 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 353 transitions. [2024-09-12 15:37:41,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:37:41,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:41,175 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:41,186 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:41,375 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2024-09-12 15:37:41,375 INFO L399 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:41,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:41,376 INFO L85 PathProgramCache]: Analyzing trace with hash -1714679140, now seen corresponding path program 34 times [2024-09-12 15:37:41,376 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:41,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670281392] [2024-09-12 15:37:41,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:41,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:41,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:41,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:41,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:41,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:41,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:41,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:41,684 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:41,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:41,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670281392] [2024-09-12 15:37:41,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670281392] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:41,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507475709] [2024-09-12 15:37:41,685 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:41,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:41,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:41,686 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) [2024-09-12 15:37:41,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2024-09-12 15:37:41,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:41,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:41,737 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:37:41,737 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:41,872 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:41,872 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:41,960 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507475709] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:41,960 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:41,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 34 [2024-09-12 15:37:41,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317412711] [2024-09-12 15:37:41,961 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:41,961 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:37:41,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:41,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:37:41,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1047, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:37:41,962 INFO L87 Difference]: Start difference. First operand 299 states and 353 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:42,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:42,451 INFO L93 Difference]: Finished difference Result 363 states and 428 transitions. [2024-09-12 15:37:42,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:37:42,451 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-12 15:37:42,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:42,453 INFO L225 Difference]: With dead ends: 363 [2024-09-12 15:37:42,453 INFO L226 Difference]: Without dead ends: 357 [2024-09-12 15:37:42,454 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:37:42,455 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1925 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 1994 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:42,455 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 1994 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:37:42,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 357 states. [2024-09-12 15:37:42,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 357 to 313. [2024-09-12 15:37:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 313 states, 271 states have (on average 1.2066420664206643) internal successors, (327), 293 states have internal predecessors, (327), 16 states have call successors, (16), 5 states have call predecessors, (16), 25 states have return successors, (27), 14 states have call predecessors, (27), 14 states have call successors, (27) [2024-09-12 15:37:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 313 states to 313 states and 370 transitions. [2024-09-12 15:37:42,521 INFO L78 Accepts]: Start accepts. Automaton has 313 states and 370 transitions. Word has length 44 [2024-09-12 15:37:42,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:42,521 INFO L474 AbstractCegarLoop]: Abstraction has 313 states and 370 transitions. [2024-09-12 15:37:42,521 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:42,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:42,522 INFO L276 IsEmpty]: Start isEmpty. Operand 313 states and 370 transitions. [2024-09-12 15:37:42,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:37:42,523 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:42,523 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:42,534 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:42,723 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,35 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:42,724 INFO L399 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:42,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:42,724 INFO L85 PathProgramCache]: Analyzing trace with hash 403829916, now seen corresponding path program 35 times [2024-09-12 15:37:42,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:42,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092331859] [2024-09-12 15:37:42,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:42,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:42,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:42,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:42,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:42,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:42,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:43,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:43,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092331859] [2024-09-12 15:37:43,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092331859] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:43,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984027559] [2024-09-12 15:37:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:43,038 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:43,038 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:43,040 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) [2024-09-12 15:37:43,040 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2024-09-12 15:37:43,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:37:43,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:43,101 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-12 15:37:43,102 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:43,290 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:43,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984027559] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:43,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:43,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 34 [2024-09-12 15:37:43,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865124151] [2024-09-12 15:37:43,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:43,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:37:43,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:37:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1043, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:37:43,369 INFO L87 Difference]: Start difference. First operand 313 states and 370 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:43,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:43,760 INFO L93 Difference]: Finished difference Result 319 states and 375 transitions. [2024-09-12 15:37:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:37:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-12 15:37:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:43,762 INFO L225 Difference]: With dead ends: 319 [2024-09-12 15:37:43,762 INFO L226 Difference]: Without dead ends: 299 [2024-09-12 15:37:43,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1455, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:37:43,764 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1297 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1347 SdHoareTripleChecker+Invalid, 1020 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:43,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1347 Invalid, 1020 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:37:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2024-09-12 15:37:43,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 299. [2024-09-12 15:37:43,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 260 states have (on average 1.2076923076923076) internal successors, (314), 280 states have internal predecessors, (314), 15 states have call successors, (15), 5 states have call predecessors, (15), 23 states have return successors, (25), 13 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-12 15:37:43,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 354 transitions. [2024-09-12 15:37:43,828 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 354 transitions. Word has length 44 [2024-09-12 15:37:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:43,828 INFO L474 AbstractCegarLoop]: Abstraction has 299 states and 354 transitions. [2024-09-12 15:37:43,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:43,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 354 transitions. [2024-09-12 15:37:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:37:43,829 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:43,829 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:43,841 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:44,030 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2024-09-12 15:37:44,030 INFO L399 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:44,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:44,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1740504941, now seen corresponding path program 36 times [2024-09-12 15:37:44,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:44,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225656487] [2024-09-12 15:37:44,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:44,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:44,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:44,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:44,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:44,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:44,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:44,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 22 [2024-09-12 15:37:44,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:44,259 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 15:37:44,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225656487] [2024-09-12 15:37:44,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225656487] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:44,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301846427] [2024-09-12 15:37:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:44,259 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:44,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:44,261 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) [2024-09-12 15:37:44,262 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2024-09-12 15:37:44,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 15:37:44,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:44,319 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:37:44,319 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:44,493 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 15:37:44,493 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:44,759 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 15:37:44,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1301846427] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:44,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:44,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-12 15:37:44,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543698630] [2024-09-12 15:37:44,759 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:44,760 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:37:44,760 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:44,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:37:44,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:44,760 INFO L87 Difference]: Start difference. First operand 299 states and 354 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:45,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:45,092 INFO L93 Difference]: Finished difference Result 343 states and 408 transitions. [2024-09-12 15:37:45,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:37:45,093 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-12 15:37:45,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:45,095 INFO L225 Difference]: With dead ends: 343 [2024-09-12 15:37:45,095 INFO L226 Difference]: Without dead ends: 328 [2024-09-12 15:37:45,097 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:37:45,097 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 454 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:45,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 454 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:45,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2024-09-12 15:37:45,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 324. [2024-09-12 15:37:45,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 270 states have (on average 1.1962962962962962) internal successors, (323), 300 states have internal predecessors, (323), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-12 15:37:45,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 383 transitions. [2024-09-12 15:37:45,169 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 383 transitions. Word has length 44 [2024-09-12 15:37:45,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:45,169 INFO L474 AbstractCegarLoop]: Abstraction has 324 states and 383 transitions. [2024-09-12 15:37:45,169 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:45,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:45,169 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 383 transitions. [2024-09-12 15:37:45,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:37:45,171 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:45,171 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:45,183 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:45,372 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,37 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:45,372 INFO L399 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:45,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:45,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1448463004, now seen corresponding path program 37 times [2024-09-12 15:37:45,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:45,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411308210] [2024-09-12 15:37:45,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:45,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:45,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:45,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:45,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:45,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:45,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:45,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:45,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:45,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:45,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411308210] [2024-09-12 15:37:45,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411308210] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:45,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70614576] [2024-09-12 15:37:45,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:45,609 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:45,609 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:45,610 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) [2024-09-12 15:37:45,610 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2024-09-12 15:37:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:45,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:37:45,662 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:45,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:45,921 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:45,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70614576] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:45,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:45,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 34 [2024-09-12 15:37:45,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874863034] [2024-09-12 15:37:45,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:45,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-12 15:37:45,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:45,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-12 15:37:45,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1039, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:37:45,922 INFO L87 Difference]: Start difference. First operand 324 states and 383 transitions. Second operand has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:46,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:46,223 INFO L93 Difference]: Finished difference Result 340 states and 403 transitions. [2024-09-12 15:37:46,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:37:46,223 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 44 [2024-09-12 15:37:46,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:46,225 INFO L225 Difference]: With dead ends: 340 [2024-09-12 15:37:46,225 INFO L226 Difference]: Without dead ends: 325 [2024-09-12 15:37:46,227 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1451, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:37:46,227 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 894 mSDsCounter, 0 mSdLazyCounter, 731 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 930 SdHoareTripleChecker+Invalid, 732 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:46,227 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 930 Invalid, 732 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 731 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:46,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2024-09-12 15:37:46,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 321. [2024-09-12 15:37:46,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 267 states have (on average 1.202247191011236) internal successors, (321), 297 states have internal predecessors, (321), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (40), 18 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-12 15:37:46,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 381 transitions. [2024-09-12 15:37:46,297 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 381 transitions. Word has length 44 [2024-09-12 15:37:46,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:46,297 INFO L474 AbstractCegarLoop]: Abstraction has 321 states and 381 transitions. [2024-09-12 15:37:46,297 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 29 states have (on average 1.4827586206896552) internal successors, (43), 29 states have internal predecessors, (43), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:46,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:46,298 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 381 transitions. [2024-09-12 15:37:46,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2024-09-12 15:37:46,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:46,299 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:46,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:46,500 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2024-09-12 15:37:46,500 INFO L399 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:46,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:46,500 INFO L85 PathProgramCache]: Analyzing trace with hash -296415821, now seen corresponding path program 38 times [2024-09-12 15:37:46,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:46,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1909037852] [2024-09-12 15:37:46,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:46,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:46,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:46,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:46,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:46,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:46,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:46,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:46,691 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-12 15:37:46,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1909037852] [2024-09-12 15:37:46,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1909037852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:46,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570196533] [2024-09-12 15:37:46,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:46,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:46,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:46,694 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) [2024-09-12 15:37:46,695 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2024-09-12 15:37:46,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:46,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:46,751 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-12 15:37:46,751 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:46,896 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 15:37:46,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:47,146 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-09-12 15:37:47,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570196533] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:47,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:47,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 13, 13] total 32 [2024-09-12 15:37:47,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724728304] [2024-09-12 15:37:47,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:47,147 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-12 15:37:47,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:47,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-12 15:37:47,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2024-09-12 15:37:47,148 INFO L87 Difference]: Start difference. First operand 321 states and 381 transitions. Second operand has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:47,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:47,441 INFO L93 Difference]: Finished difference Result 333 states and 392 transitions. [2024-09-12 15:37:47,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-12 15:37:47,442 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 44 [2024-09-12 15:37:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:47,449 INFO L225 Difference]: With dead ends: 333 [2024-09-12 15:37:47,449 INFO L226 Difference]: Without dead ends: 313 [2024-09-12 15:37:47,451 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 74 SyntacticMatches, 3 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2024-09-12 15:37:47,454 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 414 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 446 SdHoareTripleChecker+Invalid, 421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:47,454 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 446 Invalid, 421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 414 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:47,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2024-09-12 15:37:47,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2024-09-12 15:37:47,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 257 states have (on average 1.2023346303501945) internal successors, (309), 287 states have internal predecessors, (309), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (36), 18 states have call predecessors, (36), 18 states have call successors, (36) [2024-09-12 15:37:47,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 365 transitions. [2024-09-12 15:37:47,559 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 365 transitions. Word has length 44 [2024-09-12 15:37:47,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:47,560 INFO L474 AbstractCegarLoop]: Abstraction has 311 states and 365 transitions. [2024-09-12 15:37:47,560 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.6875) internal successors, (54), 32 states have internal predecessors, (54), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:47,560 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:47,560 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 365 transitions. [2024-09-12 15:37:47,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:37:47,562 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:47,562 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:47,573 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:47,762 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2024-09-12 15:37:47,762 INFO L399 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:47,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:47,762 INFO L85 PathProgramCache]: Analyzing trace with hash -562826821, now seen corresponding path program 39 times [2024-09-12 15:37:47,762 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:47,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009254945] [2024-09-12 15:37:47,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:47,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:47,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:47,807 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:47,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:47,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:47,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:47,888 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:47,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:48,028 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:48,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009254945] [2024-09-12 15:37:48,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009254945] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:48,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895101745] [2024-09-12 15:37:48,029 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:48,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:48,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:48,031 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) [2024-09-12 15:37:48,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2024-09-12 15:37:48,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:37:48,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:48,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:37:48,087 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:48,426 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:48,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:49,015 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:49,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895101745] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:49,016 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:49,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-12 15:37:49,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189622831] [2024-09-12 15:37:49,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:49,016 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:37:49,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:49,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:37:49,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:37:49,017 INFO L87 Difference]: Start difference. First operand 311 states and 365 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:49,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:49,738 INFO L93 Difference]: Finished difference Result 371 states and 438 transitions. [2024-09-12 15:37:49,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:37:49,738 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-12 15:37:49,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:49,741 INFO L225 Difference]: With dead ends: 371 [2024-09-12 15:37:49,741 INFO L226 Difference]: Without dead ends: 358 [2024-09-12 15:37:49,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:37:49,743 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:49,743 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 732 Invalid, 1059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:37:49,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358 states. [2024-09-12 15:37:49,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358 to 350. [2024-09-12 15:37:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 350 states, 290 states have (on average 1.2) internal successors, (348), 324 states have internal predecessors, (348), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (42), 20 states have call predecessors, (42), 20 states have call successors, (42) [2024-09-12 15:37:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 350 states to 350 states and 412 transitions. [2024-09-12 15:37:49,828 INFO L78 Accepts]: Start accepts. Automaton has 350 states and 412 transitions. Word has length 45 [2024-09-12 15:37:49,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:49,828 INFO L474 AbstractCegarLoop]: Abstraction has 350 states and 412 transitions. [2024-09-12 15:37:49,828 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:49,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:49,829 INFO L276 IsEmpty]: Start isEmpty. Operand 350 states and 412 transitions. [2024-09-12 15:37:49,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:37:49,831 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:49,831 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:49,842 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:50,031 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2024-09-12 15:37:50,031 INFO L399 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:50,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:50,032 INFO L85 PathProgramCache]: Analyzing trace with hash 1290988434, now seen corresponding path program 40 times [2024-09-12 15:37:50,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:50,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543506983] [2024-09-12 15:37:50,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:50,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:50,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:50,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:50,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:50,083 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:50,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:50,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:50,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:50,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543506983] [2024-09-12 15:37:50,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543506983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:50,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165058511] [2024-09-12 15:37:50,289 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:50,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:50,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:50,291 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) [2024-09-12 15:37:50,291 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2024-09-12 15:37:50,342 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:50,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:50,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:37:50,343 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:50,634 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:50,634 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:51,126 INFO L134 CoverageAnalysis]: Checked inductivity of 53 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:51,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1165058511] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:51,126 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:51,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 19] total 48 [2024-09-12 15:37:51,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393944566] [2024-09-12 15:37:51,126 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:51,126 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:37:51,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:51,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:37:51,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2099, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:37:51,127 INFO L87 Difference]: Start difference. First operand 350 states and 412 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:51,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:51,823 INFO L93 Difference]: Finished difference Result 364 states and 426 transitions. [2024-09-12 15:37:51,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:37:51,823 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 45 [2024-09-12 15:37:51,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:51,825 INFO L225 Difference]: With dead ends: 364 [2024-09-12 15:37:51,825 INFO L226 Difference]: Without dead ends: 353 [2024-09-12 15:37:51,827 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=248, Invalid=3174, Unknown=0, NotChecked=0, Total=3422 [2024-09-12 15:37:51,827 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 767 mSDsCounter, 0 mSdLazyCounter, 988 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 988 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:51,827 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 799 Invalid, 999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 988 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:37:51,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2024-09-12 15:37:51,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 351. [2024-09-12 15:37:51,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 291 states have (on average 1.1993127147766323) internal successors, (349), 325 states have internal predecessors, (349), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-12 15:37:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 410 transitions. [2024-09-12 15:37:51,929 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 410 transitions. Word has length 45 [2024-09-12 15:37:51,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:51,929 INFO L474 AbstractCegarLoop]: Abstraction has 351 states and 410 transitions. [2024-09-12 15:37:51,929 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:37:51,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:51,929 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 410 transitions. [2024-09-12 15:37:51,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:37:51,932 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:51,932 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:51,943 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2024-09-12 15:37:52,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2024-09-12 15:37:52,132 INFO L399 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:52,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:52,133 INFO L85 PathProgramCache]: Analyzing trace with hash 973220789, now seen corresponding path program 41 times [2024-09-12 15:37:52,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:52,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [867612650] [2024-09-12 15:37:52,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:52,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:52,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,156 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [867612650] [2024-09-12 15:37:52,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [867612650] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:52,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200137932] [2024-09-12 15:37:52,196 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:52,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:52,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:52,197 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) [2024-09-12 15:37:52,198 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2024-09-12 15:37:52,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:37:52,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:52,253 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:37:52,254 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:52,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200137932] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:52,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-12 15:37:52,336 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10835165] [2024-09-12 15:37:52,336 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:52,336 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:37:52,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:52,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:37:52,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:37:52,336 INFO L87 Difference]: Start difference. First operand 351 states and 410 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:52,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:52,487 INFO L93 Difference]: Finished difference Result 372 states and 435 transitions. [2024-09-12 15:37:52,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:37:52,487 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 45 [2024-09-12 15:37:52,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:52,489 INFO L225 Difference]: With dead ends: 372 [2024-09-12 15:37:52,489 INFO L226 Difference]: Without dead ends: 352 [2024-09-12 15:37:52,491 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:37:52,491 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 40 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:52,492 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 148 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:52,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2024-09-12 15:37:52,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 342. [2024-09-12 15:37:52,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 288 states have (on average 1.1875) internal successors, (342), 318 states have internal predecessors, (342), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-12 15:37:52,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 395 transitions. [2024-09-12 15:37:52,578 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 395 transitions. Word has length 45 [2024-09-12 15:37:52,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:52,578 INFO L474 AbstractCegarLoop]: Abstraction has 342 states and 395 transitions. [2024-09-12 15:37:52,578 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, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:37:52,578 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:52,579 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 395 transitions. [2024-09-12 15:37:52,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-12 15:37:52,580 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:52,580 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:52,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2024-09-12 15:37:52,781 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:52,781 INFO L399 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:52,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:52,781 INFO L85 PathProgramCache]: Analyzing trace with hash -85619334, now seen corresponding path program 42 times [2024-09-12 15:37:52,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:52,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043096417] [2024-09-12 15:37:52,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:52,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:52,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:52,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,804 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:52,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-12 15:37:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:52,844 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043096417] [2024-09-12 15:37:52,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043096417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:52,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967529484] [2024-09-12 15:37:52,844 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:37:52,844 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:52,844 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:52,845 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) [2024-09-12 15:37:52,846 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2024-09-12 15:37:52,902 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-12 15:37:52,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:52,902 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-12 15:37:52,903 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:52,939 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:52,985 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:37:52,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967529484] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:52,985 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:52,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 15 [2024-09-12 15:37:52,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177695567] [2024-09-12 15:37:52,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:52,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-12 15:37:52,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:52,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-12 15:37:52,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=131, Unknown=0, NotChecked=0, Total=210 [2024-09-12 15:37:52,986 INFO L87 Difference]: Start difference. First operand 342 states and 395 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:53,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:53,164 INFO L93 Difference]: Finished difference Result 535 states and 612 transitions. [2024-09-12 15:37:53,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-12 15:37:53,165 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 45 [2024-09-12 15:37:53,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:53,168 INFO L225 Difference]: With dead ends: 535 [2024-09-12 15:37:53,168 INFO L226 Difference]: Without dead ends: 349 [2024-09-12 15:37:53,170 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 84 SyntacticMatches, 9 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=155, Invalid=265, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:37:53,171 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 25 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:53,171 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 217 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:37:53,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-12 15:37:53,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-12 15:37:53,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (33), 18 states have call predecessors, (33), 18 states have call successors, (33) [2024-09-12 15:37:53,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 402 transitions. [2024-09-12 15:37:53,260 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 402 transitions. Word has length 45 [2024-09-12 15:37:53,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:53,260 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 402 transitions. [2024-09-12 15:37:53,260 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 15 states have internal predecessors, (45), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:53,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:53,260 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 402 transitions. [2024-09-12 15:37:53,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:37:53,270 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:53,270 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:53,281 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2024-09-12 15:37:53,470 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:53,471 INFO L399 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:53,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:53,471 INFO L85 PathProgramCache]: Analyzing trace with hash -1876412539, now seen corresponding path program 43 times [2024-09-12 15:37:53,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:53,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743775429] [2024-09-12 15:37:53,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:53,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:53,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:53,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:53,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:53,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:53,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:53,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:53,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:53,821 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:53,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743775429] [2024-09-12 15:37:53,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743775429] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:53,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593793662] [2024-09-12 15:37:53,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:37:53,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:53,822 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:53,823 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) [2024-09-12 15:37:53,823 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2024-09-12 15:37:53,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:53,878 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:37:53,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:54,004 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:54,004 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:54,106 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:37:54,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593793662] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:54,106 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:54,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 36 [2024-09-12 15:37:54,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [786508624] [2024-09-12 15:37:54,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:54,107 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:54,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:54,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:54,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1181, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:54,108 INFO L87 Difference]: Start difference. First operand 349 states and 402 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:54,652 INFO L93 Difference]: Finished difference Result 419 states and 483 transitions. [2024-09-12 15:37:54,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:37:54,652 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-12 15:37:54,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:54,654 INFO L225 Difference]: With dead ends: 419 [2024-09-12 15:37:54,655 INFO L226 Difference]: Without dead ends: 413 [2024-09-12 15:37:54,657 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=1617, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:54,657 INFO L434 NwaCegarLoop]: 75 mSDtfsCounter, 78 mSDsluCounter, 2171 mSDsCounter, 0 mSdLazyCounter, 1647 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 2246 SdHoareTripleChecker+Invalid, 1648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:54,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 2246 Invalid, 1648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1647 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:37:54,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2024-09-12 15:37:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 363. [2024-09-12 15:37:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 306 states have (on average 1.1830065359477124) internal successors, (362), 338 states have internal predecessors, (362), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (36), 19 states have call predecessors, (36), 19 states have call successors, (36) [2024-09-12 15:37:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2024-09-12 15:37:54,751 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 46 [2024-09-12 15:37:54,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:54,752 INFO L474 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2024-09-12 15:37:54,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:54,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:54,752 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2024-09-12 15:37:54,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:37:54,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:54,754 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:54,766 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2024-09-12 15:37:54,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,44 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:54,955 INFO L399 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:54,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:54,955 INFO L85 PathProgramCache]: Analyzing trace with hash -493129823, now seen corresponding path program 44 times [2024-09-12 15:37:54,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:54,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371409984] [2024-09-12 15:37:54,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:54,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:54,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:55,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:55,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:55,032 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:55,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:55,119 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:55,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:55,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371409984] [2024-09-12 15:37:55,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371409984] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:55,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1963861251] [2024-09-12 15:37:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:37:55,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:55,254 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) [2024-09-12 15:37:55,256 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2024-09-12 15:37:55,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:37:55,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:55,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:37:55,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:55,491 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:55,491 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:55,582 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:37:55,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1963861251] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:55,582 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:55,582 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 36 [2024-09-12 15:37:55,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677673972] [2024-09-12 15:37:55,582 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:55,582 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:55,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:55,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:55,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1177, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:55,583 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:56,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:56,007 INFO L93 Difference]: Finished difference Result 369 states and 424 transitions. [2024-09-12 15:37:56,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:37:56,008 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-12 15:37:56,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:56,010 INFO L225 Difference]: With dead ends: 369 [2024-09-12 15:37:56,010 INFO L226 Difference]: Without dead ends: 349 [2024-09-12 15:37:56,012 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1613, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:56,012 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1644 mSDsCounter, 0 mSdLazyCounter, 1224 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1707 SdHoareTripleChecker+Invalid, 1225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:56,012 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1707 Invalid, 1225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1224 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:37:56,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2024-09-12 15:37:56,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2024-09-12 15:37:56,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 295 states have (on average 1.1830508474576271) internal successors, (349), 325 states have internal predecessors, (349), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (34), 18 states have call predecessors, (34), 18 states have call successors, (34) [2024-09-12 15:37:56,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2024-09-12 15:37:56,112 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 46 [2024-09-12 15:37:56,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:56,112 INFO L474 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2024-09-12 15:37:56,112 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:56,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:56,113 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2024-09-12 15:37:56,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:37:56,115 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:56,115 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:56,126 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2024-09-12 15:37:56,315 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,45 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:56,315 INFO L399 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:56,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:56,315 INFO L85 PathProgramCache]: Analyzing trace with hash -573359227, now seen corresponding path program 45 times [2024-09-12 15:37:56,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:56,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294240117] [2024-09-12 15:37:56,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:56,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:56,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:56,389 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:56,390 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:56,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:56,577 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:56,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294240117] [2024-09-12 15:37:56,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294240117] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:56,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1775165746] [2024-09-12 15:37:56,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:37:56,578 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:56,578 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:56,579 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:37:56,580 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2024-09-12 15:37:56,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-12 15:37:56,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:56,636 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:37:56,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:56,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:56,915 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:37:56,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1775165746] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:56,915 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:56,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 36 [2024-09-12 15:37:56,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2706906] [2024-09-12 15:37:56,915 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:56,915 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:56,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:56,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:56,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1173, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:56,916 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:57,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:57,302 INFO L93 Difference]: Finished difference Result 355 states and 408 transitions. [2024-09-12 15:37:57,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:37:57,303 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-12 15:37:57,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:57,304 INFO L225 Difference]: With dead ends: 355 [2024-09-12 15:37:57,304 INFO L226 Difference]: Without dead ends: 333 [2024-09-12 15:37:57,306 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=1609, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:57,306 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1254 mSDsCounter, 0 mSdLazyCounter, 967 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 968 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 967 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:57,307 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1301 Invalid, 968 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 967 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:37:57,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2024-09-12 15:37:57,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 333. [2024-09-12 15:37:57,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 282 states have (on average 1.1843971631205674) internal successors, (334), 310 states have internal predecessors, (334), 19 states have call successors, (19), 5 states have call predecessors, (19), 31 states have return successors, (32), 17 states have call predecessors, (32), 17 states have call successors, (32) [2024-09-12 15:37:57,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 385 transitions. [2024-09-12 15:37:57,393 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 385 transitions. Word has length 46 [2024-09-12 15:37:57,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:57,393 INFO L474 AbstractCegarLoop]: Abstraction has 333 states and 385 transitions. [2024-09-12 15:37:57,393 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:57,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:57,393 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 385 transitions. [2024-09-12 15:37:57,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-09-12 15:37:57,395 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:57,395 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:57,407 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2024-09-12 15:37:57,596 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:57,596 INFO L399 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:57,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:57,596 INFO L85 PathProgramCache]: Analyzing trace with hash 1234099105, now seen corresponding path program 46 times [2024-09-12 15:37:57,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:57,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581286691] [2024-09-12 15:37:57,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:57,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:57,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:57,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:57,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:57,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:57,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:57,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:57,842 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:37:57,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581286691] [2024-09-12 15:37:57,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581286691] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:57,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99748605] [2024-09-12 15:37:57,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:37:57,842 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:57,843 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:37:57,844 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2024-09-12 15:37:57,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:37:57,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:57,900 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-12 15:37:57,901 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:58,122 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:37:58,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:37:58,204 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:37:58,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [99748605] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:37:58,204 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:37:58,204 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 36 [2024-09-12 15:37:58,204 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601500848] [2024-09-12 15:37:58,204 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:37:58,204 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-12 15:37:58,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:37:58,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-12 15:37:58,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1169, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:37:58,205 INFO L87 Difference]: Start difference. First operand 333 states and 385 transitions. Second operand has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:58,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:37:58,491 INFO L93 Difference]: Finished difference Result 349 states and 404 transitions. [2024-09-12 15:37:58,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-12 15:37:58,494 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 46 [2024-09-12 15:37:58,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:37:58,497 INFO L225 Difference]: With dead ends: 349 [2024-09-12 15:37:58,497 INFO L226 Difference]: Without dead ends: 343 [2024-09-12 15:37:58,498 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:37:58,499 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 705 mSDsCounter, 0 mSdLazyCounter, 620 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:37:58,499 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 733 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 620 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:37:58,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2024-09-12 15:37:58,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 341. [2024-09-12 15:37:58,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 287 states have (on average 1.1881533101045296) internal successors, (341), 317 states have internal predecessors, (341), 20 states have call successors, (20), 5 states have call predecessors, (20), 33 states have return successors, (35), 18 states have call predecessors, (35), 18 states have call successors, (35) [2024-09-12 15:37:58,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 396 transitions. [2024-09-12 15:37:58,594 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 396 transitions. Word has length 46 [2024-09-12 15:37:58,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:37:58,594 INFO L474 AbstractCegarLoop]: Abstraction has 341 states and 396 transitions. [2024-09-12 15:37:58,594 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 31 states have (on average 1.4516129032258065) internal successors, (45), 31 states have internal predecessors, (45), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:37:58,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:58,595 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 396 transitions. [2024-09-12 15:37:58,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:37:58,596 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:37:58,597 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:37:58,609 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2024-09-12 15:37:58,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:58,797 INFO L399 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:37:58,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:37:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1281594894, now seen corresponding path program 47 times [2024-09-12 15:37:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:37:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963747969] [2024-09-12 15:37:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:37:58,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:37:58,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:58,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:37:58,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:58,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:37:58,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:58,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:37:58,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:37:59,106 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:59,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:37:59,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963747969] [2024-09-12 15:37:59,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963747969] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:37:59,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940934563] [2024-09-12 15:37:59,106 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:37:59,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:37:59,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:37:59,107 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:37:59,108 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2024-09-12 15:37:59,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:37:59,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:37:59,165 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:37:59,166 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:37:59,526 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:37:59,526 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:00,194 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:00,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940934563] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:00,195 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:00,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-12 15:38:00,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209805789] [2024-09-12 15:38:00,195 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:00,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:38:00,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:00,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:38:00,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:38:00,196 INFO L87 Difference]: Start difference. First operand 341 states and 396 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:01,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:01,092 INFO L93 Difference]: Finished difference Result 403 states and 471 transitions. [2024-09-12 15:38:01,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:38:01,093 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-12 15:38:01,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:01,095 INFO L225 Difference]: With dead ends: 403 [2024-09-12 15:38:01,096 INFO L226 Difference]: Without dead ends: 390 [2024-09-12 15:38:01,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 606 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:38:01,098 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 747 mSDsCounter, 0 mSdLazyCounter, 1252 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 774 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:01,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 774 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1252 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:38:01,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 390 states. [2024-09-12 15:38:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 390 to 382. [2024-09-12 15:38:01,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 322 states have (on average 1.186335403726708) internal successors, (382), 356 states have internal predecessors, (382), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (41), 20 states have call predecessors, (41), 20 states have call successors, (41) [2024-09-12 15:38:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 445 transitions. [2024-09-12 15:38:01,206 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 445 transitions. Word has length 47 [2024-09-12 15:38:01,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:01,206 INFO L474 AbstractCegarLoop]: Abstraction has 382 states and 445 transitions. [2024-09-12 15:38:01,206 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:01,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:01,206 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 445 transitions. [2024-09-12 15:38:01,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:38:01,208 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:01,208 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:01,220 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2024-09-12 15:38:01,409 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2024-09-12 15:38:01,409 INFO L399 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:01,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:01,409 INFO L85 PathProgramCache]: Analyzing trace with hash 352103163, now seen corresponding path program 48 times [2024-09-12 15:38:01,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:01,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477319634] [2024-09-12 15:38:01,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:01,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:01,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:01,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:01,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:01,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:01,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:01,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:01,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:01,718 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:01,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477319634] [2024-09-12 15:38:01,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477319634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:01,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331921719] [2024-09-12 15:38:01,718 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:38:01,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:01,718 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:01,719 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:01,720 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2024-09-12 15:38:01,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:38:01,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:01,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:38:01,780 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:02,130 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:02,131 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:02,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [331921719] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:02,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:02,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 21] total 54 [2024-09-12 15:38:02,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2990136] [2024-09-12 15:38:02,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:02,750 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-09-12 15:38:02,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:02,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-09-12 15:38:02,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2684, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:38:02,751 INFO L87 Difference]: Start difference. First operand 382 states and 445 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:03,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:03,631 INFO L93 Difference]: Finished difference Result 396 states and 459 transitions. [2024-09-12 15:38:03,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:38:03,631 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 47 [2024-09-12 15:38:03,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:03,633 INFO L225 Difference]: With dead ends: 396 [2024-09-12 15:38:03,633 INFO L226 Difference]: Without dead ends: 385 [2024-09-12 15:38:03,635 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=292, Invalid=4130, Unknown=0, NotChecked=0, Total=4422 [2024-09-12 15:38:03,636 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 797 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 829 SdHoareTripleChecker+Invalid, 1186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:03,636 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 829 Invalid, 1186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:03,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2024-09-12 15:38:03,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 383. [2024-09-12 15:38:03,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 323 states have (on average 1.1857585139318885) internal successors, (383), 357 states have internal predecessors, (383), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-12 15:38:03,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 443 transitions. [2024-09-12 15:38:03,752 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 443 transitions. Word has length 47 [2024-09-12 15:38:03,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:03,752 INFO L474 AbstractCegarLoop]: Abstraction has 383 states and 443 transitions. [2024-09-12 15:38:03,753 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 54 states have internal predecessors, (84), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:03,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:03,753 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 443 transitions. [2024-09-12 15:38:03,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:38:03,755 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:03,755 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:03,767 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:03,959 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2024-09-12 15:38:03,960 INFO L399 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:03,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:03,960 INFO L85 PathProgramCache]: Analyzing trace with hash -804302246, now seen corresponding path program 49 times [2024-09-12 15:38:03,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:03,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410297314] [2024-09-12 15:38:03,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:03,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:03,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:03,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:03,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:03,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:03,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,029 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:04,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,031 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:04,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410297314] [2024-09-12 15:38:04,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410297314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:04,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219265491] [2024-09-12 15:38:04,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:38:04,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:04,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:04,033 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:04,033 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2024-09-12 15:38:04,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,092 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:38:04,092 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:04,179 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1219265491] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:04,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:04,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-12 15:38:04,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927213110] [2024-09-12 15:38:04,179 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:04,179 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:38:04,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:04,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:38:04,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:38:04,180 INFO L87 Difference]: Start difference. First operand 383 states and 443 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:04,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:04,389 INFO L93 Difference]: Finished difference Result 654 states and 759 transitions. [2024-09-12 15:38:04,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:38:04,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 47 [2024-09-12 15:38:04,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:04,394 INFO L225 Difference]: With dead ends: 654 [2024-09-12 15:38:04,394 INFO L226 Difference]: Without dead ends: 441 [2024-09-12 15:38:04,397 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:38:04,397 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:04,397 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:38:04,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2024-09-12 15:38:04,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 441. [2024-09-12 15:38:04,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 381 states have (on average 1.1811023622047243) internal successors, (450), 415 states have internal predecessors, (450), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-12 15:38:04,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 510 transitions. [2024-09-12 15:38:04,523 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 510 transitions. Word has length 47 [2024-09-12 15:38:04,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:04,523 INFO L474 AbstractCegarLoop]: Abstraction has 441 states and 510 transitions. [2024-09-12 15:38:04,523 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:04,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:04,523 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 510 transitions. [2024-09-12 15:38:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2024-09-12 15:38:04,525 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:04,525 INFO L216 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:04,537 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:04,726 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2024-09-12 15:38:04,726 INFO L399 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:04,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:04,726 INFO L85 PathProgramCache]: Analyzing trace with hash 731392309, now seen corresponding path program 50 times [2024-09-12 15:38:04,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:04,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002781071] [2024-09-12 15:38:04,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:04,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:04,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,752 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:04,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:04,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:38:04,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:04,807 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002781071] [2024-09-12 15:38:04,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002781071] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:04,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334190270] [2024-09-12 15:38:04,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:04,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:04,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:04,809 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:04,810 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2024-09-12 15:38:04,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:04,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:04,870 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-12 15:38:04,871 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:04,933 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,933 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:04,983 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-12 15:38:04,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334190270] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:04,983 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:04,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 17 [2024-09-12 15:38:04,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696770738] [2024-09-12 15:38:04,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:04,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-12 15:38:04,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:04,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-12 15:38:04,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2024-09-12 15:38:04,984 INFO L87 Difference]: Start difference. First operand 441 states and 510 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:05,211 INFO L93 Difference]: Finished difference Result 529 states and 623 transitions. [2024-09-12 15:38:05,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-12 15:38:05,211 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 47 [2024-09-12 15:38:05,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:05,214 INFO L225 Difference]: With dead ends: 529 [2024-09-12 15:38:05,214 INFO L226 Difference]: Without dead ends: 499 [2024-09-12 15:38:05,217 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 87 SyntacticMatches, 9 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:38:05,217 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 17 mSDsluCounter, 209 mSDsCounter, 0 mSdLazyCounter, 137 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 137 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:05,217 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 243 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 137 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:38:05,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-12 15:38:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-12 15:38:05,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (38), 20 states have call predecessors, (38), 20 states have call successors, (38) [2024-09-12 15:38:05,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 577 transitions. [2024-09-12 15:38:05,377 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 577 transitions. Word has length 47 [2024-09-12 15:38:05,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:05,377 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 577 transitions. [2024-09-12 15:38:05,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 17 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:05,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:05,377 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 577 transitions. [2024-09-12 15:38:05,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:05,381 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:05,381 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:05,392 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2024-09-12 15:38:05,581 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2024-09-12 15:38:05,581 INFO L399 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:05,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:05,582 INFO L85 PathProgramCache]: Analyzing trace with hash -917084868, now seen corresponding path program 51 times [2024-09-12 15:38:05,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:05,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8882494] [2024-09-12 15:38:05,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:05,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:05,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:05,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:05,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:05,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:05,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:05,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:05,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:05,962 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:05,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8882494] [2024-09-12 15:38:05,962 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8882494] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:05,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167645875] [2024-09-12 15:38:05,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:38:05,963 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:05,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:05,964 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:05,964 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2024-09-12 15:38:06,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:38:06,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:06,026 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:38:06,027 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:06,158 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:06,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:06,269 INFO L134 CoverageAnalysis]: Checked inductivity of 76 backedges. 0 proven. 74 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:06,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167645875] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:06,269 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:06,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 38 [2024-09-12 15:38:06,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81410639] [2024-09-12 15:38:06,269 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:06,270 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:06,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:06,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:06,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1323, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:06,270 INFO L87 Difference]: Start difference. First operand 499 states and 577 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:06,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:06,968 INFO L93 Difference]: Finished difference Result 583 states and 674 transitions. [2024-09-12 15:38:06,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:38:06,968 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-12 15:38:06,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:06,971 INFO L225 Difference]: With dead ends: 583 [2024-09-12 15:38:06,971 INFO L226 Difference]: Without dead ends: 577 [2024-09-12 15:38:06,974 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=1783, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:06,974 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2560 mSDsCounter, 0 mSdLazyCounter, 1886 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 2645 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:06,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 2645 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1886 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:38:06,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2024-09-12 15:38:07,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 513. [2024-09-12 15:38:07,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 450 states have (on average 1.1777777777777778) internal successors, (530), 486 states have internal predecessors, (530), 23 states have call successors, (23), 5 states have call predecessors, (23), 39 states have return successors, (41), 21 states have call predecessors, (41), 21 states have call successors, (41) [2024-09-12 15:38:07,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 594 transitions. [2024-09-12 15:38:07,123 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 594 transitions. Word has length 48 [2024-09-12 15:38:07,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:07,123 INFO L474 AbstractCegarLoop]: Abstraction has 513 states and 594 transitions. [2024-09-12 15:38:07,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:07,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:07,123 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 594 transitions. [2024-09-12 15:38:07,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:07,126 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:07,126 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:07,137 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2024-09-12 15:38:07,326 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:07,326 INFO L399 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:07,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:07,327 INFO L85 PathProgramCache]: Analyzing trace with hash 442135356, now seen corresponding path program 52 times [2024-09-12 15:38:07,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:07,327 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625376033] [2024-09-12 15:38:07,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:07,327 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:07,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:07,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:07,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:07,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:07,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:07,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:07,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:07,665 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:07,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625376033] [2024-09-12 15:38:07,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625376033] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:07,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247391552] [2024-09-12 15:38:07,665 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:38:07,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:07,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:07,667 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:07,669 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2024-09-12 15:38:07,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:38:07,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:07,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:38:07,730 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:07,902 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:07,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:07,997 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:07,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247391552] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:07,998 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:07,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 38 [2024-09-12 15:38:07,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604702171] [2024-09-12 15:38:07,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:07,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:07,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:07,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:07,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1319, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:07,999 INFO L87 Difference]: Start difference. First operand 513 states and 594 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:08,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:08,536 INFO L93 Difference]: Finished difference Result 519 states and 599 transitions. [2024-09-12 15:38:08,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:38:08,537 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-12 15:38:08,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:08,539 INFO L225 Difference]: With dead ends: 519 [2024-09-12 15:38:08,539 INFO L226 Difference]: Without dead ends: 499 [2024-09-12 15:38:08,542 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:08,542 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 1867 mSDsCounter, 0 mSdLazyCounter, 1413 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 1936 SdHoareTripleChecker+Invalid, 1414 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1413 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:08,542 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 1936 Invalid, 1414 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1413 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:08,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 499 states. [2024-09-12 15:38:08,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 499 to 499. [2024-09-12 15:38:08,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 439 states have (on average 1.1776765375854215) internal successors, (517), 473 states have internal predecessors, (517), 22 states have call successors, (22), 5 states have call predecessors, (22), 37 states have return successors, (39), 20 states have call predecessors, (39), 20 states have call successors, (39) [2024-09-12 15:38:08,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 578 transitions. [2024-09-12 15:38:08,721 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 578 transitions. Word has length 48 [2024-09-12 15:38:08,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:08,721 INFO L474 AbstractCegarLoop]: Abstraction has 499 states and 578 transitions. [2024-09-12 15:38:08,721 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:08,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:08,721 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 578 transitions. [2024-09-12 15:38:08,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:08,724 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:08,724 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:08,736 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2024-09-12 15:38:08,924 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:08,925 INFO L399 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:08,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:08,926 INFO L85 PathProgramCache]: Analyzing trace with hash 2109377852, now seen corresponding path program 53 times [2024-09-12 15:38:08,926 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:08,926 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771856806] [2024-09-12 15:38:08,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:08,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:08,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:09,027 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:09,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:09,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:09,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:09,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:09,244 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:09,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:09,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771856806] [2024-09-12 15:38:09,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771856806] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:09,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438254411] [2024-09-12 15:38:09,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:38:09,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:09,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:09,246 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:09,246 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2024-09-12 15:38:09,306 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-12 15:38:09,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:09,307 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 54 conjuncts are in the unsatisfiable core [2024-09-12 15:38:09,307 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:09,499 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:09,499 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:09,569 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:09,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [438254411] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:09,569 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:09,569 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 38 [2024-09-12 15:38:09,569 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527845440] [2024-09-12 15:38:09,569 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:09,569 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:09,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:09,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:09,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:09,570 INFO L87 Difference]: Start difference. First operand 499 states and 578 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:10,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:10,042 INFO L93 Difference]: Finished difference Result 505 states and 583 transitions. [2024-09-12 15:38:10,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:38:10,043 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-12 15:38:10,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:10,045 INFO L225 Difference]: With dead ends: 505 [2024-09-12 15:38:10,045 INFO L226 Difference]: Without dead ends: 483 [2024-09-12 15:38:10,047 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1775, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:10,047 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 46 mSDsluCounter, 1391 mSDsCounter, 0 mSdLazyCounter, 1159 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 1441 SdHoareTripleChecker+Invalid, 1160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:10,047 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 1441 Invalid, 1160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1159 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:10,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2024-09-12 15:38:10,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 483. [2024-09-12 15:38:10,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 426 states have (on average 1.1784037558685445) internal successors, (502), 458 states have internal predecessors, (502), 21 states have call successors, (21), 5 states have call predecessors, (21), 35 states have return successors, (37), 19 states have call predecessors, (37), 19 states have call successors, (37) [2024-09-12 15:38:10,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 560 transitions. [2024-09-12 15:38:10,187 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 560 transitions. Word has length 48 [2024-09-12 15:38:10,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:10,187 INFO L474 AbstractCegarLoop]: Abstraction has 483 states and 560 transitions. [2024-09-12 15:38:10,188 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:10,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:10,188 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 560 transitions. [2024-09-12 15:38:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:10,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:10,190 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:10,205 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:10,390 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:10,390 INFO L399 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:10,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:10,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1301335053, now seen corresponding path program 54 times [2024-09-12 15:38:10,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:10,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907547212] [2024-09-12 15:38:10,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:10,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:10,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:10,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:10,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:10,441 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:10,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:10,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2024-09-12 15:38:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:10,617 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 15:38:10,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907547212] [2024-09-12 15:38:10,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907547212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:10,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [695713451] [2024-09-12 15:38:10,618 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:38:10,618 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:10,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:10,619 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:10,619 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2024-09-12 15:38:10,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:38:10,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:10,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:38:10,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:10,863 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 15:38:10,863 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:11,190 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 15:38:11,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [695713451] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:11,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:11,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-12 15:38:11,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052769140] [2024-09-12 15:38:11,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:11,191 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:11,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:11,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:11,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:11,191 INFO L87 Difference]: Start difference. First operand 483 states and 560 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:11,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:11,682 INFO L93 Difference]: Finished difference Result 539 states and 630 transitions. [2024-09-12 15:38:11,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:38:11,682 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-12 15:38:11,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:11,688 INFO L225 Difference]: With dead ends: 539 [2024-09-12 15:38:11,688 INFO L226 Difference]: Without dead ends: 523 [2024-09-12 15:38:11,691 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:38:11,691 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 509 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 538 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:11,691 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 538 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:11,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2024-09-12 15:38:11,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 519. [2024-09-12 15:38:11,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 519 states, 441 states have (on average 1.1700680272108843) internal successors, (516), 487 states have internal predecessors, (516), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-12 15:38:11,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 519 states to 519 states and 602 transitions. [2024-09-12 15:38:11,845 INFO L78 Accepts]: Start accepts. Automaton has 519 states and 602 transitions. Word has length 48 [2024-09-12 15:38:11,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:11,845 INFO L474 AbstractCegarLoop]: Abstraction has 519 states and 602 transitions. [2024-09-12 15:38:11,845 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:11,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:11,845 INFO L276 IsEmpty]: Start isEmpty. Operand 519 states and 602 transitions. [2024-09-12 15:38:11,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:11,848 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:11,848 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:11,859 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2024-09-12 15:38:12,048 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:12,048 INFO L399 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:12,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:12,048 INFO L85 PathProgramCache]: Analyzing trace with hash 948849468, now seen corresponding path program 55 times [2024-09-12 15:38:12,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:12,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478412248] [2024-09-12 15:38:12,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:12,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:12,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:12,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:12,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:12,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:12,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:12,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:12,387 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:12,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:12,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478412248] [2024-09-12 15:38:12,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478412248] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:12,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238065492] [2024-09-12 15:38:12,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:38:12,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:12,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:12,389 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:12,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2024-09-12 15:38:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:12,462 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:38:12,463 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:12,704 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:12,704 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:12,814 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:12,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238065492] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:12,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:12,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 38 [2024-09-12 15:38:12,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1890699437] [2024-09-12 15:38:12,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:12,815 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:12,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:12,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:12,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1311, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:12,816 INFO L87 Difference]: Start difference. First operand 519 states and 602 transitions. Second operand has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:13,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:13,224 INFO L93 Difference]: Finished difference Result 535 states and 622 transitions. [2024-09-12 15:38:13,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:38:13,224 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 48 [2024-09-12 15:38:13,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:13,228 INFO L225 Difference]: With dead ends: 535 [2024-09-12 15:38:13,228 INFO L226 Difference]: Without dead ends: 519 [2024-09-12 15:38:13,230 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1771, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:13,230 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 929 mSDsCounter, 0 mSdLazyCounter, 828 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 965 SdHoareTripleChecker+Invalid, 829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 828 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:13,231 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 965 Invalid, 829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 828 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:13,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 519 states. [2024-09-12 15:38:13,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 519 to 515. [2024-09-12 15:38:13,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 437 states have (on average 1.173913043478261) internal successors, (513), 483 states have internal predecessors, (513), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (58), 26 states have call predecessors, (58), 26 states have call successors, (58) [2024-09-12 15:38:13,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 599 transitions. [2024-09-12 15:38:13,396 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 599 transitions. Word has length 48 [2024-09-12 15:38:13,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:13,396 INFO L474 AbstractCegarLoop]: Abstraction has 515 states and 599 transitions. [2024-09-12 15:38:13,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 33 states have (on average 1.4242424242424243) internal successors, (47), 33 states have internal predecessors, (47), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:13,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:13,396 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 599 transitions. [2024-09-12 15:38:13,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2024-09-12 15:38:13,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:13,399 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:13,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2024-09-12 15:38:13,599 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:13,599 INFO L399 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:13,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:13,599 INFO L85 PathProgramCache]: Analyzing trace with hash -2036774893, now seen corresponding path program 56 times [2024-09-12 15:38:13,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:13,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202007236] [2024-09-12 15:38:13,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:13,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:13,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:13,641 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:13,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:13,642 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:13,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:13,718 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:13,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:13,811 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-12 15:38:13,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202007236] [2024-09-12 15:38:13,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202007236] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:13,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970407528] [2024-09-12 15:38:13,812 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:13,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:13,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:13,813 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:13,813 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2024-09-12 15:38:13,873 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:13,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:13,874 INFO L262 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-12 15:38:13,875 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 15:38:14,061 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:14,396 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2024-09-12 15:38:14,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970407528] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:14,396 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:14,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15, 15] total 38 [2024-09-12 15:38:14,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737385561] [2024-09-12 15:38:14,396 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:14,396 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-12 15:38:14,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:14,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-12 15:38:14,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=1274, Unknown=0, NotChecked=0, Total=1406 [2024-09-12 15:38:14,397 INFO L87 Difference]: Start difference. First operand 515 states and 599 transitions. Second operand has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:14,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:14,903 INFO L93 Difference]: Finished difference Result 527 states and 610 transitions. [2024-09-12 15:38:14,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-12 15:38:14,904 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 48 [2024-09-12 15:38:14,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:14,906 INFO L225 Difference]: With dead ends: 527 [2024-09-12 15:38:14,906 INFO L226 Difference]: Without dead ends: 505 [2024-09-12 15:38:14,909 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=183, Invalid=1797, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:38:14,909 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 15 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 636 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 596 SdHoareTripleChecker+Invalid, 646 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 636 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:14,909 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 596 Invalid, 646 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 636 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:14,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 505 states. [2024-09-12 15:38:15,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 505 to 503. [2024-09-12 15:38:15,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 503 states, 425 states have (on average 1.1741176470588235) internal successors, (499), 471 states have internal predecessors, (499), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (52), 26 states have call predecessors, (52), 26 states have call successors, (52) [2024-09-12 15:38:15,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 503 states to 503 states and 579 transitions. [2024-09-12 15:38:15,078 INFO L78 Accepts]: Start accepts. Automaton has 503 states and 579 transitions. Word has length 48 [2024-09-12 15:38:15,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:15,078 INFO L474 AbstractCegarLoop]: Abstraction has 503 states and 579 transitions. [2024-09-12 15:38:15,078 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.5789473684210527) internal successors, (60), 38 states have internal predecessors, (60), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:15,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:15,079 INFO L276 IsEmpty]: Start isEmpty. Operand 503 states and 579 transitions. [2024-09-12 15:38:15,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:38:15,081 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:15,081 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:15,093 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:15,282 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2024-09-12 15:38:15,283 INFO L399 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:15,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:15,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1607208165, now seen corresponding path program 57 times [2024-09-12 15:38:15,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:15,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651684744] [2024-09-12 15:38:15,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:15,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:15,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:15,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:15,340 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:15,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:15,689 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:15,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651684744] [2024-09-12 15:38:15,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1651684744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:15,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1467623289] [2024-09-12 15:38:15,690 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:38:15,690 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:15,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:15,691 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:15,692 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2024-09-12 15:38:15,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:38:15,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:15,767 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:38:15,769 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:16,211 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:16,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:16,920 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:16,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1467623289] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:16,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:16,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-12 15:38:16,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7187153] [2024-09-12 15:38:16,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:16,920 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-12 15:38:16,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:16,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-12 15:38:16,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:38:16,921 INFO L87 Difference]: Start difference. First operand 503 states and 579 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:18,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:18,223 INFO L93 Difference]: Finished difference Result 585 states and 678 transitions. [2024-09-12 15:38:18,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:38:18,223 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-12 15:38:18,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:18,229 INFO L225 Difference]: With dead ends: 585 [2024-09-12 15:38:18,229 INFO L226 Difference]: Without dead ends: 572 [2024-09-12 15:38:18,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-12 15:38:18,232 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 872 mSDsCounter, 0 mSdLazyCounter, 1576 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 899 SdHoareTripleChecker+Invalid, 1591 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1576 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:18,233 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 899 Invalid, 1591 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1576 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:18,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2024-09-12 15:38:18,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 564. [2024-09-12 15:38:18,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 564 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 529 states have internal predecessors, (559), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (61), 29 states have call predecessors, (61), 29 states have call successors, (61) [2024-09-12 15:38:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 564 states to 564 states and 651 transitions. [2024-09-12 15:38:18,429 INFO L78 Accepts]: Start accepts. Automaton has 564 states and 651 transitions. Word has length 49 [2024-09-12 15:38:18,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:18,429 INFO L474 AbstractCegarLoop]: Abstraction has 564 states and 651 transitions. [2024-09-12 15:38:18,429 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:18,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:18,429 INFO L276 IsEmpty]: Start isEmpty. Operand 564 states and 651 transitions. [2024-09-12 15:38:18,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:38:18,432 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:18,433 INFO L216 NwaCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:18,444 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:18,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:18,633 INFO L399 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:18,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:18,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791346, now seen corresponding path program 58 times [2024-09-12 15:38:18,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:18,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967139322] [2024-09-12 15:38:18,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:18,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:18,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:18,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:18,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:18,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:18,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:18,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:18,964 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:18,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:18,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967139322] [2024-09-12 15:38:18,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [967139322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:18,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733595177] [2024-09-12 15:38:18,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:38:18,965 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:18,965 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:18,966 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:18,966 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2024-09-12 15:38:19,027 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:38:19,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:19,028 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-12 15:38:19,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:19,452 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:19,452 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:20,194 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:20,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [733595177] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:20,194 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:20,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 23] total 60 [2024-09-12 15:38:20,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305456987] [2024-09-12 15:38:20,194 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:20,194 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2024-09-12 15:38:20,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:20,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2024-09-12 15:38:20,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=3341, Unknown=0, NotChecked=0, Total=3540 [2024-09-12 15:38:20,195 INFO L87 Difference]: Start difference. First operand 564 states and 651 transitions. Second operand has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:21,434 INFO L93 Difference]: Finished difference Result 578 states and 665 transitions. [2024-09-12 15:38:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-12 15:38:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 49 [2024-09-12 15:38:21,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:21,437 INFO L225 Difference]: With dead ends: 578 [2024-09-12 15:38:21,437 INFO L226 Difference]: Without dead ends: 567 [2024-09-12 15:38:21,440 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=338, Invalid=5212, Unknown=0, NotChecked=0, Total=5550 [2024-09-12 15:38:21,441 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1115 mSDsCounter, 0 mSdLazyCounter, 1704 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1147 SdHoareTripleChecker+Invalid, 1719 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 1704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:21,441 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1147 Invalid, 1719 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 1704 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:21,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-12 15:38:21,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 565. [2024-09-12 15:38:21,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 565 states, 478 states have (on average 1.1715481171548117) internal successors, (560), 530 states have internal predecessors, (560), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-12 15:38:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 565 states to 565 states and 648 transitions. [2024-09-12 15:38:21,640 INFO L78 Accepts]: Start accepts. Automaton has 565 states and 648 transitions. Word has length 49 [2024-09-12 15:38:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:21,640 INFO L474 AbstractCegarLoop]: Abstraction has 565 states and 648 transitions. [2024-09-12 15:38:21,640 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.5) internal successors, (90), 60 states have internal predecessors, (90), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:21,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 565 states and 648 transitions. [2024-09-12 15:38:21,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:38:21,644 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:21,644 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:21,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2024-09-12 15:38:21,844 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2024-09-12 15:38:21,844 INFO L399 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:21,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:21,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1028676879, now seen corresponding path program 59 times [2024-09-12 15:38:21,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:21,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167687447] [2024-09-12 15:38:21,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:21,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:21,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:21,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:21,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:21,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:21,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:21,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:21,927 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:21,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167687447] [2024-09-12 15:38:21,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167687447] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:21,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57359023] [2024-09-12 15:38:21,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:38:21,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:21,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:21,929 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:21,930 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2024-09-12 15:38:21,996 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:38:21,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:21,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:38:21,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:22,044 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:22,044 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:22,093 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:22,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [57359023] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:22,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:22,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-12 15:38:22,093 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658812846] [2024-09-12 15:38:22,093 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:22,093 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:38:22,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:22,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:38:22,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:38:22,094 INFO L87 Difference]: Start difference. First operand 565 states and 648 transitions. Second operand has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:22,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:22,375 INFO L93 Difference]: Finished difference Result 592 states and 681 transitions. [2024-09-12 15:38:22,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:38:22,376 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 49 [2024-09-12 15:38:22,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:22,378 INFO L225 Difference]: With dead ends: 592 [2024-09-12 15:38:22,378 INFO L226 Difference]: Without dead ends: 568 [2024-09-12 15:38:22,382 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:38:22,382 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 55 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:22,382 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 232 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:38:22,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2024-09-12 15:38:22,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 558. [2024-09-12 15:38:22,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 477 states have (on average 1.1635220125786163) internal successors, (555), 525 states have internal predecessors, (555), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-12 15:38:22,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 635 transitions. [2024-09-12 15:38:22,569 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 635 transitions. Word has length 49 [2024-09-12 15:38:22,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:22,569 INFO L474 AbstractCegarLoop]: Abstraction has 558 states and 635 transitions. [2024-09-12 15:38:22,569 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.1666666666666665) internal successors, (39), 18 states have internal predecessors, (39), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:22,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:22,570 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 635 transitions. [2024-09-12 15:38:22,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-12 15:38:22,572 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:22,572 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:22,584 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:22,773 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2024-09-12 15:38:22,773 INFO L399 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:22,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:22,773 INFO L85 PathProgramCache]: Analyzing trace with hash -853281446, now seen corresponding path program 60 times [2024-09-12 15:38:22,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:22,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737573223] [2024-09-12 15:38:22,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:22,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:22,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:22,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:22,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:22,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:22,851 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 25 [2024-09-12 15:38:22,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:22,854 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:22,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737573223] [2024-09-12 15:38:22,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737573223] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:22,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874406542] [2024-09-12 15:38:22,854 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:38:22,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:22,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:22,855 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:22,857 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2024-09-12 15:38:22,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:38:22,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:22,923 INFO L262 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-12 15:38:22,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:22,971 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:22,971 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 15 proven. 10 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:23,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874406542] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:23,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:23,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 18 [2024-09-12 15:38:23,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601940071] [2024-09-12 15:38:23,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:23,020 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-12 15:38:23,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:23,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-12 15:38:23,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=193, Unknown=0, NotChecked=0, Total=306 [2024-09-12 15:38:23,021 INFO L87 Difference]: Start difference. First operand 558 states and 635 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:23,304 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:23,305 INFO L93 Difference]: Finished difference Result 861 states and 969 transitions. [2024-09-12 15:38:23,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-12 15:38:23,305 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 49 [2024-09-12 15:38:23,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:23,312 INFO L225 Difference]: With dead ends: 861 [2024-09-12 15:38:23,312 INFO L226 Difference]: Without dead ends: 567 [2024-09-12 15:38:23,316 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 89 SyntacticMatches, 11 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=483, Unknown=0, NotChecked=0, Total=756 [2024-09-12 15:38:23,316 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 42 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 103 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:23,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 170 Invalid, 103 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:38:23,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-12 15:38:23,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-12 15:38:23,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (51), 27 states have call predecessors, (51), 27 states have call successors, (51) [2024-09-12 15:38:23,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 644 transitions. [2024-09-12 15:38:23,508 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 644 transitions. Word has length 49 [2024-09-12 15:38:23,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:23,508 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 644 transitions. [2024-09-12 15:38:23,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:23,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:23,509 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 644 transitions. [2024-09-12 15:38:23,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:38:23,511 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:23,511 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:23,522 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2024-09-12 15:38:23,712 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2024-09-12 15:38:23,712 INFO L399 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:23,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:23,712 INFO L85 PathProgramCache]: Analyzing trace with hash 794575845, now seen corresponding path program 61 times [2024-09-12 15:38:23,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:23,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110813750] [2024-09-12 15:38:23,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:23,712 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:23,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:23,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:23,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:23,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:23,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:23,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:23,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:24,150 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:24,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110813750] [2024-09-12 15:38:24,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110813750] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:24,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678451467] [2024-09-12 15:38:24,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:38:24,151 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:24,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:24,152 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:24,153 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2024-09-12 15:38:24,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:24,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 15:38:24,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:24,383 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:24,384 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:24,508 INFO L134 CoverageAnalysis]: Checked inductivity of 94 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:24,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678451467] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:24,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:24,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 40 [2024-09-12 15:38:24,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343797941] [2024-09-12 15:38:24,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:24,509 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:38:24,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:24,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:38:24,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:38:24,510 INFO L87 Difference]: Start difference. First operand 567 states and 644 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:25,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:25,341 INFO L93 Difference]: Finished difference Result 657 states and 747 transitions. [2024-09-12 15:38:25,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:38:25,341 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-12 15:38:25,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:25,346 INFO L225 Difference]: With dead ends: 657 [2024-09-12 15:38:25,346 INFO L226 Difference]: Without dead ends: 651 [2024-09-12 15:38:25,350 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=113, Invalid=1957, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:38:25,350 INFO L434 NwaCegarLoop]: 91 mSDtfsCounter, 97 mSDsluCounter, 2935 mSDsCounter, 0 mSdLazyCounter, 2203 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 3026 SdHoareTripleChecker+Invalid, 2204 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:25,350 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 3026 Invalid, 2204 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2203 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:25,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 651 states. [2024-09-12 15:38:25,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 651 to 581. [2024-09-12 15:38:25,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 581 states, 497 states have (on average 1.1609657947686116) internal successors, (577), 547 states have internal predecessors, (577), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (54), 28 states have call predecessors, (54), 28 states have call successors, (54) [2024-09-12 15:38:25,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 581 states to 581 states and 661 transitions. [2024-09-12 15:38:25,565 INFO L78 Accepts]: Start accepts. Automaton has 581 states and 661 transitions. Word has length 50 [2024-09-12 15:38:25,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:25,565 INFO L474 AbstractCegarLoop]: Abstraction has 581 states and 661 transitions. [2024-09-12 15:38:25,565 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:25,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:25,566 INFO L276 IsEmpty]: Start isEmpty. Operand 581 states and 661 transitions. [2024-09-12 15:38:25,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:38:25,569 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:25,569 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:25,581 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:25,769 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:25,770 INFO L399 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:25,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:25,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1446674175, now seen corresponding path program 62 times [2024-09-12 15:38:25,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:25,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267627855] [2024-09-12 15:38:25,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:25,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:25,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:25,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:25,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:26,006 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:26,232 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:26,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267627855] [2024-09-12 15:38:26,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267627855] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:26,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004598783] [2024-09-12 15:38:26,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:26,233 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:26,233 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:26,234 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:26,235 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2024-09-12 15:38:26,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:26,304 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:38:26,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:26,484 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:26,586 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:26,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1004598783] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:26,586 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:26,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 40 [2024-09-12 15:38:26,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476016710] [2024-09-12 15:38:26,586 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:26,586 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:38:26,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:26,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:38:26,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1469, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:38:26,587 INFO L87 Difference]: Start difference. First operand 581 states and 661 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:27,292 INFO L93 Difference]: Finished difference Result 587 states and 666 transitions. [2024-09-12 15:38:27,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:38:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-12 15:38:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:27,295 INFO L225 Difference]: With dead ends: 587 [2024-09-12 15:38:27,295 INFO L226 Difference]: Without dead ends: 567 [2024-09-12 15:38:27,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:38:27,298 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 76 mSDsluCounter, 2442 mSDsCounter, 0 mSdLazyCounter, 1856 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 2521 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1856 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:27,298 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 2521 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1856 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:38:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 567 states. [2024-09-12 15:38:27,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 567 to 567. [2024-09-12 15:38:27,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 486 states have (on average 1.1604938271604939) internal successors, (564), 534 states have internal predecessors, (564), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (52), 27 states have call predecessors, (52), 27 states have call successors, (52) [2024-09-12 15:38:27,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 645 transitions. [2024-09-12 15:38:27,491 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 645 transitions. Word has length 50 [2024-09-12 15:38:27,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:27,491 INFO L474 AbstractCegarLoop]: Abstraction has 567 states and 645 transitions. [2024-09-12 15:38:27,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:27,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:27,492 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 645 transitions. [2024-09-12 15:38:27,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:38:27,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:27,494 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:27,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:27,695 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:27,695 INFO L399 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash -10438683, now seen corresponding path program 63 times [2024-09-12 15:38:27,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:27,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259538865] [2024-09-12 15:38:27,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:27,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:27,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:27,780 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:27,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:27,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:27,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:27,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:27,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:28,032 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:28,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259538865] [2024-09-12 15:38:28,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259538865] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:28,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434767941] [2024-09-12 15:38:28,032 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:38:28,033 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:28,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:28,034 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:28,034 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2024-09-12 15:38:28,102 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:38:28,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:28,103 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:38:28,104 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:28,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:28,409 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:28,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [434767941] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:28,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:28,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 40 [2024-09-12 15:38:28,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681897687] [2024-09-12 15:38:28,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:28,410 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:38:28,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:28,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:38:28,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1465, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:38:28,411 INFO L87 Difference]: Start difference. First operand 567 states and 645 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:28,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:28,997 INFO L93 Difference]: Finished difference Result 573 states and 650 transitions. [2024-09-12 15:38:28,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:38:28,998 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-12 15:38:28,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:29,000 INFO L225 Difference]: With dead ends: 573 [2024-09-12 15:38:29,000 INFO L226 Difference]: Without dead ends: 551 [2024-09-12 15:38:29,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=1949, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:38:29,005 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 1870 mSDsCounter, 0 mSdLazyCounter, 1469 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 1933 SdHoareTripleChecker+Invalid, 1470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1469 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:29,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 1933 Invalid, 1470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1469 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:29,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2024-09-12 15:38:29,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 551. [2024-09-12 15:38:29,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 473 states have (on average 1.160676532769556) internal successors, (549), 519 states have internal predecessors, (549), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (50), 26 states have call predecessors, (50), 26 states have call successors, (50) [2024-09-12 15:38:29,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 627 transitions. [2024-09-12 15:38:29,191 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 627 transitions. Word has length 50 [2024-09-12 15:38:29,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:29,192 INFO L474 AbstractCegarLoop]: Abstraction has 551 states and 627 transitions. [2024-09-12 15:38:29,192 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:29,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:29,192 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 627 transitions. [2024-09-12 15:38:29,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:38:29,194 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:29,194 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:29,205 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2024-09-12 15:38:29,394 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2024-09-12 15:38:29,395 INFO L399 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:29,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:29,395 INFO L85 PathProgramCache]: Analyzing trace with hash -1691124479, now seen corresponding path program 64 times [2024-09-12 15:38:29,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:29,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148086423] [2024-09-12 15:38:29,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:29,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:29,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:29,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:29,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:29,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:29,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:29,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:29,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:29,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148086423] [2024-09-12 15:38:29,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148086423] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:29,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169376196] [2024-09-12 15:38:29,716 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:38:29,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:29,716 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:29,717 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:29,718 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2024-09-12 15:38:29,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:38:29,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:29,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:38:29,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:30,024 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:30,024 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:30,119 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:30,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169376196] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:30,119 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:30,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 40 [2024-09-12 15:38:30,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316912282] [2024-09-12 15:38:30,120 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:30,120 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:38:30,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:30,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:38:30,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1461, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:38:30,120 INFO L87 Difference]: Start difference. First operand 551 states and 627 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:30,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:30,617 INFO L93 Difference]: Finished difference Result 557 states and 632 transitions. [2024-09-12 15:38:30,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:38:30,618 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-12 15:38:30,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:30,620 INFO L225 Difference]: With dead ends: 557 [2024-09-12 15:38:30,620 INFO L226 Difference]: Without dead ends: 533 [2024-09-12 15:38:30,623 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=1945, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:38:30,623 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1340 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1387 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:30,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1387 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:30,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2024-09-12 15:38:30,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 533. [2024-09-12 15:38:30,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 533 states, 458 states have (on average 1.1615720524017468) internal successors, (532), 502 states have internal predecessors, (532), 27 states have call successors, (27), 5 states have call predecessors, (27), 47 states have return successors, (48), 25 states have call predecessors, (48), 25 states have call successors, (48) [2024-09-12 15:38:30,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 533 states to 533 states and 607 transitions. [2024-09-12 15:38:30,840 INFO L78 Accepts]: Start accepts. Automaton has 533 states and 607 transitions. Word has length 50 [2024-09-12 15:38:30,840 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:30,840 INFO L474 AbstractCegarLoop]: Abstraction has 533 states and 607 transitions. [2024-09-12 15:38:30,840 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:30,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:30,841 INFO L276 IsEmpty]: Start isEmpty. Operand 533 states and 607 transitions. [2024-09-12 15:38:30,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2024-09-12 15:38:30,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:30,844 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:30,855 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2024-09-12 15:38:31,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,65 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:31,044 INFO L399 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:31,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:31,045 INFO L85 PathProgramCache]: Analyzing trace with hash -695186459, now seen corresponding path program 65 times [2024-09-12 15:38:31,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:31,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1527858606] [2024-09-12 15:38:31,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:31,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:31,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:31,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:31,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:31,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:31,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:31,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:31,393 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:31,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1527858606] [2024-09-12 15:38:31,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1527858606] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:31,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271917155] [2024-09-12 15:38:31,393 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:38:31,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:31,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:31,395 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:31,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2024-09-12 15:38:31,466 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:38:31,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:31,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 47 conjuncts are in the unsatisfiable core [2024-09-12 15:38:31,469 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:31,750 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:31,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:31,843 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:31,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271917155] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:31,843 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:31,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 40 [2024-09-12 15:38:31,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599061762] [2024-09-12 15:38:31,843 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:31,844 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-12 15:38:31,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:31,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-12 15:38:31,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1457, Unknown=0, NotChecked=0, Total=1560 [2024-09-12 15:38:31,844 INFO L87 Difference]: Start difference. First operand 533 states and 607 transitions. Second operand has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:32,264 INFO L93 Difference]: Finished difference Result 549 states and 626 transitions. [2024-09-12 15:38:32,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-09-12 15:38:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 50 [2024-09-12 15:38:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:32,268 INFO L225 Difference]: With dead ends: 549 [2024-09-12 15:38:32,268 INFO L226 Difference]: Without dead ends: 543 [2024-09-12 15:38:32,271 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=1941, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:38:32,271 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 808 mSDsCounter, 0 mSdLazyCounter, 772 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 836 SdHoareTripleChecker+Invalid, 773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 772 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:32,271 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 836 Invalid, 773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 772 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:32,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-09-12 15:38:32,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 541. [2024-09-12 15:38:32,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 463 states have (on average 1.16414686825054) internal successors, (539), 509 states have internal predecessors, (539), 28 states have call successors, (28), 5 states have call predecessors, (28), 49 states have return successors, (51), 26 states have call predecessors, (51), 26 states have call successors, (51) [2024-09-12 15:38:32,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 618 transitions. [2024-09-12 15:38:32,472 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 618 transitions. Word has length 50 [2024-09-12 15:38:32,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:32,472 INFO L474 AbstractCegarLoop]: Abstraction has 541 states and 618 transitions. [2024-09-12 15:38:32,472 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 35 states have (on average 1.4) internal successors, (49), 35 states have internal predecessors, (49), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:32,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:32,472 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 618 transitions. [2024-09-12 15:38:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:38:32,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:32,475 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:32,486 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:32,675 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,66 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:32,675 INFO L399 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:32,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:32,676 INFO L85 PathProgramCache]: Analyzing trace with hash -85333614, now seen corresponding path program 66 times [2024-09-12 15:38:32,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:32,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402598113] [2024-09-12 15:38:32,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:32,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:32,738 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:32,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:32,739 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:32,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:32,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:32,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:33,074 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:33,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402598113] [2024-09-12 15:38:33,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402598113] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:33,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779813812] [2024-09-12 15:38:33,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:38:33,075 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:33,075 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:33,076 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:33,077 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2024-09-12 15:38:33,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2024-09-12 15:38:33,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:33,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:38:33,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:33,648 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:33,648 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:34,492 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:34,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779813812] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:34,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:34,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-12 15:38:34,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533787598] [2024-09-12 15:38:34,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:34,492 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-12 15:38:34,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:34,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-12 15:38:34,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:38:34,493 INFO L87 Difference]: Start difference. First operand 541 states and 618 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:35,930 INFO L93 Difference]: Finished difference Result 625 states and 719 transitions. [2024-09-12 15:38:35,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:38:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-12 15:38:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:35,937 INFO L225 Difference]: With dead ends: 625 [2024-09-12 15:38:35,937 INFO L226 Difference]: Without dead ends: 612 [2024-09-12 15:38:35,940 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 15:38:35,940 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 914 SdHoareTripleChecker+Invalid, 1747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:35,940 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 914 Invalid, 1747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2024-09-12 15:38:36,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 604. [2024-09-12 15:38:36,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 604 states, 517 states have (on average 1.1624758220502902) internal successors, (601), 569 states have internal predecessors, (601), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (60), 29 states have call predecessors, (60), 29 states have call successors, (60) [2024-09-12 15:38:36,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 604 states to 604 states and 692 transitions. [2024-09-12 15:38:36,158 INFO L78 Accepts]: Start accepts. Automaton has 604 states and 692 transitions. Word has length 51 [2024-09-12 15:38:36,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:36,158 INFO L474 AbstractCegarLoop]: Abstraction has 604 states and 692 transitions. [2024-09-12 15:38:36,158 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:36,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:36,158 INFO L276 IsEmpty]: Start isEmpty. Operand 604 states and 692 transitions. [2024-09-12 15:38:36,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:38:36,161 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:36,161 INFO L216 NwaCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:36,173 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2024-09-12 15:38:36,362 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2024-09-12 15:38:36,362 INFO L399 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:36,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:36,363 INFO L85 PathProgramCache]: Analyzing trace with hash -2059531173, now seen corresponding path program 67 times [2024-09-12 15:38:36,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:36,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888562460] [2024-09-12 15:38:36,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:36,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:36,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:36,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:36,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:36,428 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:36,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:36,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:36,760 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:36,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:36,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888562460] [2024-09-12 15:38:36,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888562460] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:36,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104335073] [2024-09-12 15:38:36,761 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:38:36,761 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:36,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:36,762 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:36,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2024-09-12 15:38:36,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:36,831 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-12 15:38:36,832 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:37,360 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:37,360 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:38,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104335073] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:38,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:38,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 25, 25] total 66 [2024-09-12 15:38:38,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065146784] [2024-09-12 15:38:38,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:38,223 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2024-09-12 15:38:38,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:38,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2024-09-12 15:38:38,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=4070, Unknown=0, NotChecked=0, Total=4290 [2024-09-12 15:38:38,224 INFO L87 Difference]: Start difference. First operand 604 states and 692 transitions. Second operand has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:39,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:39,618 INFO L93 Difference]: Finished difference Result 618 states and 706 transitions. [2024-09-12 15:38:39,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-12 15:38:39,619 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 51 [2024-09-12 15:38:39,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:39,622 INFO L225 Difference]: With dead ends: 618 [2024-09-12 15:38:39,622 INFO L226 Difference]: Without dead ends: 607 [2024-09-12 15:38:39,625 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=386, Invalid=6420, Unknown=0, NotChecked=0, Total=6806 [2024-09-12 15:38:39,626 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1010 mSDsCounter, 0 mSdLazyCounter, 1673 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1042 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 1673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:39,626 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1042 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 1673 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:39,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2024-09-12 15:38:39,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 605. [2024-09-12 15:38:39,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 518 states have (on average 1.162162162162162) internal successors, (602), 570 states have internal predecessors, (602), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-12 15:38:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 689 transitions. [2024-09-12 15:38:39,871 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 689 transitions. Word has length 51 [2024-09-12 15:38:39,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:39,871 INFO L474 AbstractCegarLoop]: Abstraction has 605 states and 689 transitions. [2024-09-12 15:38:39,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.4545454545454546) internal successors, (96), 66 states have internal predecessors, (96), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:39,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:39,871 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 689 transitions. [2024-09-12 15:38:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:38:39,874 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:39,874 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:39,888 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2024-09-12 15:38:40,075 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2024-09-12 15:38:40,075 INFO L399 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:40,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:40,076 INFO L85 PathProgramCache]: Analyzing trace with hash -89209158, now seen corresponding path program 68 times [2024-09-12 15:38:40,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:40,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137315146] [2024-09-12 15:38:40,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:40,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:40,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:40,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:40,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:40,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:40,165 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:40,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:40,168 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:40,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137315146] [2024-09-12 15:38:40,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137315146] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:40,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606302669] [2024-09-12 15:38:40,168 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:40,168 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:40,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:40,169 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:40,170 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2024-09-12 15:38:40,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:40,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:40,241 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 15:38:40,242 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:40,304 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:40,304 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:40,354 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:40,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1606302669] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:40,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:40,354 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-12 15:38:40,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088171191] [2024-09-12 15:38:40,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:40,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:38:40,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:40,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:38:40,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:38:40,355 INFO L87 Difference]: Start difference. First operand 605 states and 689 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:40,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:40,740 INFO L93 Difference]: Finished difference Result 1012 states and 1152 transitions. [2024-09-12 15:38:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:38:40,741 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 51 [2024-09-12 15:38:40,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:40,751 INFO L225 Difference]: With dead ends: 1012 [2024-09-12 15:38:40,751 INFO L226 Difference]: Without dead ends: 687 [2024-09-12 15:38:40,755 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:38:40,755 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 164 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 168 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:40,755 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 236 Invalid, 168 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 164 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:38:40,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2024-09-12 15:38:41,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 687. [2024-09-12 15:38:41,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 600 states have (on average 1.1583333333333334) internal successors, (695), 652 states have internal predecessors, (695), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-12 15:38:41,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 782 transitions. [2024-09-12 15:38:41,009 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 782 transitions. Word has length 51 [2024-09-12 15:38:41,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:41,009 INFO L474 AbstractCegarLoop]: Abstraction has 687 states and 782 transitions. [2024-09-12 15:38:41,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:41,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:41,009 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 782 transitions. [2024-09-12 15:38:41,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-12 15:38:41,012 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:41,012 INFO L216 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:41,023 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:41,212 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2024-09-12 15:38:41,213 INFO L399 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:41,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:41,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1053081969, now seen corresponding path program 69 times [2024-09-12 15:38:41,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:41,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522272675] [2024-09-12 15:38:41,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:41,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:41,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:41,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:41,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:41,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:41,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:41,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:41,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:41,306 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:41,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:41,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522272675] [2024-09-12 15:38:41,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522272675] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:41,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872021509] [2024-09-12 15:38:41,307 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:38:41,307 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:41,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:41,308 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:41,308 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2024-09-12 15:38:41,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:38:41,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:41,382 INFO L262 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-12 15:38:41,383 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:41,445 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:41,445 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:41,496 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-12 15:38:41,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [872021509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:41,496 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:41,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 20 [2024-09-12 15:38:41,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588824125] [2024-09-12 15:38:41,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:41,496 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-12 15:38:41,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:41,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-12 15:38:41,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-12 15:38:41,497 INFO L87 Difference]: Start difference. First operand 687 states and 782 transitions. Second operand has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:41,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:41,919 INFO L93 Difference]: Finished difference Result 805 states and 931 transitions. [2024-09-12 15:38:41,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:38:41,919 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 51 [2024-09-12 15:38:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:41,923 INFO L225 Difference]: With dead ends: 805 [2024-09-12 15:38:41,923 INFO L226 Difference]: Without dead ends: 769 [2024-09-12 15:38:41,927 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 92 SyntacticMatches, 11 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=330, Invalid=792, Unknown=0, NotChecked=0, Total=1122 [2024-09-12 15:38:41,927 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 24 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 186 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 261 SdHoareTripleChecker+Invalid, 190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:41,927 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 261 Invalid, 190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 186 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:38:41,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-12 15:38:42,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-12 15:38:42,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (56), 29 states have call predecessors, (56), 29 states have call successors, (56) [2024-09-12 15:38:42,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 875 transitions. [2024-09-12 15:38:42,211 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 875 transitions. Word has length 51 [2024-09-12 15:38:42,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:42,212 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 875 transitions. [2024-09-12 15:38:42,212 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.1) internal successors, (42), 20 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:38:42,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:42,212 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 875 transitions. [2024-09-12 15:38:42,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:42,215 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:42,215 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:42,227 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2024-09-12 15:38:42,416 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2024-09-12 15:38:42,416 INFO L399 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:42,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:42,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1631662044, now seen corresponding path program 70 times [2024-09-12 15:38:42,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:42,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049006547] [2024-09-12 15:38:42,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:42,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:42,518 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:42,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:42,519 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:42,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:42,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:42,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:42,907 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:42,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:42,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049006547] [2024-09-12 15:38:42,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049006547] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:42,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380966773] [2024-09-12 15:38:42,908 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:38:42,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:42,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:42,909 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:42,909 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2024-09-12 15:38:43,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:38:43,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:43,003 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 15:38:43,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:43,152 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:43,152 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:43,266 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:38:43,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380966773] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:43,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:43,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 42 [2024-09-12 15:38:43,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152373717] [2024-09-12 15:38:43,267 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:43,267 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:38:43,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:43,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:38:43,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1631, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:38:43,268 INFO L87 Difference]: Start difference. First operand 769 states and 875 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:44,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:44,202 INFO L93 Difference]: Finished difference Result 875 states and 996 transitions. [2024-09-12 15:38:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:38:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-12 15:38:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:44,208 INFO L225 Difference]: With dead ends: 875 [2024-09-12 15:38:44,208 INFO L226 Difference]: Without dead ends: 869 [2024-09-12 15:38:44,213 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=117, Invalid=2139, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:38:44,213 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 108 mSDsluCounter, 3358 mSDsCounter, 0 mSdLazyCounter, 2483 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 3459 SdHoareTripleChecker+Invalid, 2484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2483 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:44,213 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [116 Valid, 3459 Invalid, 2484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2483 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:44,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 869 states. [2024-09-12 15:38:44,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 869 to 783. [2024-09-12 15:38:44,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 783 states, 693 states have (on average 1.155844155844156) internal successors, (801), 747 states have internal predecessors, (801), 32 states have call successors, (32), 5 states have call predecessors, (32), 57 states have return successors, (59), 30 states have call predecessors, (59), 30 states have call successors, (59) [2024-09-12 15:38:44,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 783 states to 783 states and 892 transitions. [2024-09-12 15:38:44,659 INFO L78 Accepts]: Start accepts. Automaton has 783 states and 892 transitions. Word has length 52 [2024-09-12 15:38:44,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:44,659 INFO L474 AbstractCegarLoop]: Abstraction has 783 states and 892 transitions. [2024-09-12 15:38:44,659 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:44,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:44,660 INFO L276 IsEmpty]: Start isEmpty. Operand 783 states and 892 transitions. [2024-09-12 15:38:44,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:44,664 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:44,664 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:44,675 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:44,864 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,71 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:44,864 INFO L399 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:44,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:44,864 INFO L85 PathProgramCache]: Analyzing trace with hash 722880988, now seen corresponding path program 71 times [2024-09-12 15:38:44,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:44,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336481073] [2024-09-12 15:38:44,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:44,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:44,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:44,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:44,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:44,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:44,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:45,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:45,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336481073] [2024-09-12 15:38:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336481073] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:45,283 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320289229] [2024-09-12 15:38:45,283 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:38:45,283 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:45,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:45,284 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:45,284 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2024-09-12 15:38:45,357 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:38:45,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:45,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 66 conjuncts are in the unsatisfiable core [2024-09-12 15:38:45,360 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:45,544 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:45,544 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:45,624 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:38:45,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320289229] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:45,624 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:45,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 42 [2024-09-12 15:38:45,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530181734] [2024-09-12 15:38:45,624 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:45,625 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:38:45,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:45,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:38:45,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1627, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:38:45,625 INFO L87 Difference]: Start difference. First operand 783 states and 892 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:46,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:46,520 INFO L93 Difference]: Finished difference Result 789 states and 897 transitions. [2024-09-12 15:38:46,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:38:46,520 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-12 15:38:46,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:46,524 INFO L225 Difference]: With dead ends: 789 [2024-09-12 15:38:46,524 INFO L226 Difference]: Without dead ends: 769 [2024-09-12 15:38:46,528 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=121, Invalid=2135, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:38:46,528 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 2869 mSDsCounter, 0 mSdLazyCounter, 2218 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 2954 SdHoareTripleChecker+Invalid, 2219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:46,528 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 2954 Invalid, 2219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2218 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:38:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2024-09-12 15:38:46,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2024-09-12 15:38:46,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 682 states have (on average 1.155425219941349) internal successors, (788), 734 states have internal predecessors, (788), 31 states have call successors, (31), 5 states have call predecessors, (31), 55 states have return successors, (57), 29 states have call predecessors, (57), 29 states have call successors, (57) [2024-09-12 15:38:46,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 876 transitions. [2024-09-12 15:38:46,813 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 876 transitions. Word has length 52 [2024-09-12 15:38:46,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:46,813 INFO L474 AbstractCegarLoop]: Abstraction has 769 states and 876 transitions. [2024-09-12 15:38:46,813 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:46,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:46,813 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 876 transitions. [2024-09-12 15:38:46,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:46,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:46,817 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:46,829 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2024-09-12 15:38:47,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,72 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:47,018 INFO L399 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:47,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:47,018 INFO L85 PathProgramCache]: Analyzing trace with hash 996657116, now seen corresponding path program 72 times [2024-09-12 15:38:47,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:47,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229650843] [2024-09-12 15:38:47,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:47,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:47,107 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:47,108 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:47,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:47,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:47,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:47,389 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:47,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:47,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229650843] [2024-09-12 15:38:47,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229650843] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:47,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [252759891] [2024-09-12 15:38:47,390 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:38:47,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:47,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:47,391 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:47,391 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2024-09-12 15:38:47,464 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:38:47,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:47,465 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:38:47,466 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:47,687 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:47,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:38:47,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [252759891] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:47,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:47,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 42 [2024-09-12 15:38:47,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809443854] [2024-09-12 15:38:47,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:47,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:38:47,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:47,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:38:47,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1623, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:38:47,797 INFO L87 Difference]: Start difference. First operand 769 states and 876 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:48,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:48,541 INFO L93 Difference]: Finished difference Result 775 states and 881 transitions. [2024-09-12 15:38:48,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:38:48,541 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-12 15:38:48,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:48,545 INFO L225 Difference]: With dead ends: 775 [2024-09-12 15:38:48,545 INFO L226 Difference]: Without dead ends: 753 [2024-09-12 15:38:48,549 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=2131, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:38:48,549 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2120 mSDsCounter, 0 mSdLazyCounter, 1682 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2189 SdHoareTripleChecker+Invalid, 1683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1682 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:48,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2189 Invalid, 1683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1682 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:38:48,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2024-09-12 15:38:48,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 753. [2024-09-12 15:38:48,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 753 states, 669 states have (on average 1.155455904334828) internal successors, (773), 719 states have internal predecessors, (773), 30 states have call successors, (30), 5 states have call predecessors, (30), 53 states have return successors, (55), 28 states have call predecessors, (55), 28 states have call successors, (55) [2024-09-12 15:38:48,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 753 states to 753 states and 858 transitions. [2024-09-12 15:38:48,831 INFO L78 Accepts]: Start accepts. Automaton has 753 states and 858 transitions. Word has length 52 [2024-09-12 15:38:48,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:48,831 INFO L474 AbstractCegarLoop]: Abstraction has 753 states and 858 transitions. [2024-09-12 15:38:48,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:48,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:48,832 INFO L276 IsEmpty]: Start isEmpty. Operand 753 states and 858 transitions. [2024-09-12 15:38:48,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:48,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:48,835 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:48,847 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2024-09-12 15:38:49,035 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,73 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:49,036 INFO L399 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:49,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:49,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1811395036, now seen corresponding path program 73 times [2024-09-12 15:38:49,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:49,036 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1505313416] [2024-09-12 15:38:49,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:49,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:49,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:49,123 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:49,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:49,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:49,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:49,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:49,380 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:49,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1505313416] [2024-09-12 15:38:49,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1505313416] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:49,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119047458] [2024-09-12 15:38:49,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:38:49,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:49,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:49,381 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:49,382 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2024-09-12 15:38:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:49,455 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:38:49,456 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:49,705 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:49,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:49,829 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:38:49,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119047458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:49,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:49,829 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 42 [2024-09-12 15:38:49,829 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416160056] [2024-09-12 15:38:49,829 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:49,829 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:38:49,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:49,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:38:49,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1619, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:38:49,830 INFO L87 Difference]: Start difference. First operand 753 states and 858 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:50,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:50,464 INFO L93 Difference]: Finished difference Result 759 states and 863 transitions. [2024-09-12 15:38:50,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:38:50,464 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-12 15:38:50,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:50,468 INFO L225 Difference]: With dead ends: 759 [2024-09-12 15:38:50,468 INFO L226 Difference]: Without dead ends: 735 [2024-09-12 15:38:50,472 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=129, Invalid=2127, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:38:50,472 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1471 mSDsCounter, 0 mSdLazyCounter, 1303 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1521 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1303 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:50,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1521 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1303 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:38:50,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2024-09-12 15:38:50,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 735. [2024-09-12 15:38:50,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 654 states have (on average 1.1559633027522935) internal successors, (756), 702 states have internal predecessors, (756), 29 states have call successors, (29), 5 states have call predecessors, (29), 51 states have return successors, (53), 27 states have call predecessors, (53), 27 states have call successors, (53) [2024-09-12 15:38:50,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 838 transitions. [2024-09-12 15:38:50,750 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 838 transitions. Word has length 52 [2024-09-12 15:38:50,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:50,750 INFO L474 AbstractCegarLoop]: Abstraction has 735 states and 838 transitions. [2024-09-12 15:38:50,751 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:50,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:50,751 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 838 transitions. [2024-09-12 15:38:50,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:50,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:50,754 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:50,766 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2024-09-12 15:38:50,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,74 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:50,955 INFO L399 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:50,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:50,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1405283885, now seen corresponding path program 74 times [2024-09-12 15:38:50,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:50,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425926891] [2024-09-12 15:38:50,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:50,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:50,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:51,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:51,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:51,005 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:51,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2024-09-12 15:38:51,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 15:38:51,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:51,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425926891] [2024-09-12 15:38:51,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425926891] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:51,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620866888] [2024-09-12 15:38:51,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:38:51,239 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:51,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:51,240 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:51,240 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2024-09-12 15:38:51,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:38:51,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:51,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:38:51,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:51,563 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 15:38:51,563 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 15:38:51,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620866888] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:51,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:51,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-12 15:38:51,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967868504] [2024-09-12 15:38:51,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:51,975 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:38:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:51,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:38:51,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:51,975 INFO L87 Difference]: Start difference. First operand 735 states and 838 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:52,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:52,715 INFO L93 Difference]: Finished difference Result 803 states and 924 transitions. [2024-09-12 15:38:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:38:52,715 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-12 15:38:52,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:52,729 INFO L225 Difference]: With dead ends: 803 [2024-09-12 15:38:52,729 INFO L226 Difference]: Without dead ends: 786 [2024-09-12 15:38:52,734 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 382 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:38:52,734 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 605 mSDsCounter, 0 mSdLazyCounter, 764 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 634 SdHoareTripleChecker+Invalid, 777 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 764 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:52,734 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 634 Invalid, 777 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 764 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:52,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 786 states. [2024-09-12 15:38:53,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 786 to 782. [2024-09-12 15:38:53,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 782 states, 674 states have (on average 1.1498516320474776) internal successors, (775), 740 states have internal predecessors, (775), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-12 15:38:53,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 782 states to 782 states and 893 transitions. [2024-09-12 15:38:53,057 INFO L78 Accepts]: Start accepts. Automaton has 782 states and 893 transitions. Word has length 52 [2024-09-12 15:38:53,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:53,058 INFO L474 AbstractCegarLoop]: Abstraction has 782 states and 893 transitions. [2024-09-12 15:38:53,058 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:53,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 782 states and 893 transitions. [2024-09-12 15:38:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:53,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:53,063 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:53,074 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2024-09-12 15:38:53,263 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,75 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:53,263 INFO L399 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:53,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:53,263 INFO L85 PathProgramCache]: Analyzing trace with hash 635330524, now seen corresponding path program 75 times [2024-09-12 15:38:53,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:53,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682929925] [2024-09-12 15:38:53,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:53,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:53,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,349 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:53,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,350 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:53,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,440 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:53,581 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:53,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:53,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682929925] [2024-09-12 15:38:53,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682929925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:53,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [500663994] [2024-09-12 15:38:53,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:38:53,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:53,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:53,582 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:53,583 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2024-09-12 15:38:53,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-12 15:38:53,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:53,657 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:38:53,658 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:53,936 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:53,936 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:54,031 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:38:54,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [500663994] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:54,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:54,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 42 [2024-09-12 15:38:54,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87474943] [2024-09-12 15:38:54,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:54,031 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-12 15:38:54,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:54,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-12 15:38:54,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1615, Unknown=0, NotChecked=0, Total=1722 [2024-09-12 15:38:54,032 INFO L87 Difference]: Start difference. First operand 782 states and 893 transitions. Second operand has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:54,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:54,621 INFO L93 Difference]: Finished difference Result 798 states and 913 transitions. [2024-09-12 15:38:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:38:54,621 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 52 [2024-09-12 15:38:54,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:54,628 INFO L225 Difference]: With dead ends: 798 [2024-09-12 15:38:54,628 INFO L226 Difference]: Without dead ends: 781 [2024-09-12 15:38:54,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=133, Invalid=2123, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:38:54,656 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1093 mSDsCounter, 0 mSdLazyCounter, 1020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1129 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:54,656 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1129 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1020 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:54,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 781 states. [2024-09-12 15:38:54,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 781 to 777. [2024-09-12 15:38:54,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 777 states, 669 states have (on average 1.1524663677130045) internal successors, (771), 735 states have internal predecessors, (771), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (80), 36 states have call predecessors, (80), 36 states have call successors, (80) [2024-09-12 15:38:54,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 777 states to 777 states and 889 transitions. [2024-09-12 15:38:54,952 INFO L78 Accepts]: Start accepts. Automaton has 777 states and 889 transitions. Word has length 52 [2024-09-12 15:38:54,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:54,952 INFO L474 AbstractCegarLoop]: Abstraction has 777 states and 889 transitions. [2024-09-12 15:38:54,952 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 37 states have (on average 1.3783783783783783) internal successors, (51), 37 states have internal predecessors, (51), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:38:54,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:54,952 INFO L276 IsEmpty]: Start isEmpty. Operand 777 states and 889 transitions. [2024-09-12 15:38:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2024-09-12 15:38:54,957 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:54,957 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:54,969 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2024-09-12 15:38:55,157 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,76 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:55,157 INFO L399 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:55,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:55,158 INFO L85 PathProgramCache]: Analyzing trace with hash -882558989, now seen corresponding path program 76 times [2024-09-12 15:38:55,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:55,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270187634] [2024-09-12 15:38:55,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:55,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:55,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:55,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:55,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:38:55,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-12 15:38:55,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270187634] [2024-09-12 15:38:55,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270187634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:55,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777656793] [2024-09-12 15:38:55,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:38:55,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:55,429 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:55,430 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:55,431 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2024-09-12 15:38:55,500 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:38:55,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:55,501 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-12 15:38:55,502 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:55,735 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 15:38:55,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:56,149 INFO L134 CoverageAnalysis]: Checked inductivity of 74 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2024-09-12 15:38:56,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777656793] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:56,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:56,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 17, 17] total 44 [2024-09-12 15:38:56,150 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976442243] [2024-09-12 15:38:56,150 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:56,150 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:38:56,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:56,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:38:56,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=1737, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:38:56,151 INFO L87 Difference]: Start difference. First operand 777 states and 889 transitions. Second operand has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:56,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:38:56,925 INFO L93 Difference]: Finished difference Result 789 states and 900 transitions. [2024-09-12 15:38:56,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-12 15:38:56,925 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 52 [2024-09-12 15:38:56,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:38:56,929 INFO L225 Difference]: With dead ends: 789 [2024-09-12 15:38:56,929 INFO L226 Difference]: Without dead ends: 765 [2024-09-12 15:38:56,934 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:38:56,934 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 794 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:38:56,934 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 626 Invalid, 794 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:38:56,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 765 states. [2024-09-12 15:38:57,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 765 to 763. [2024-09-12 15:38:57,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 763 states, 655 states have (on average 1.1526717557251909) internal successors, (755), 721 states have internal predecessors, (755), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (72), 36 states have call predecessors, (72), 36 states have call successors, (72) [2024-09-12 15:38:57,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 763 states to 763 states and 865 transitions. [2024-09-12 15:38:57,237 INFO L78 Accepts]: Start accepts. Automaton has 763 states and 865 transitions. Word has length 52 [2024-09-12 15:38:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:38:57,237 INFO L474 AbstractCegarLoop]: Abstraction has 763 states and 865 transitions. [2024-09-12 15:38:57,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5) internal successors, (66), 44 states have internal predecessors, (66), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:38:57,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 763 states and 865 transitions. [2024-09-12 15:38:57,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:38:57,242 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:38:57,242 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:38:57,254 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2024-09-12 15:38:57,442 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2024-09-12 15:38:57,442 INFO L399 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:38:57,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:38:57,443 INFO L85 PathProgramCache]: Analyzing trace with hash 94534779, now seen corresponding path program 77 times [2024-09-12 15:38:57,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:38:57,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956427007] [2024-09-12 15:38:57,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:38:57,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:38:57,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:38:57,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,510 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:38:57,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:38:57,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:38:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:57,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:38:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956427007] [2024-09-12 15:38:57,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956427007] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:38:57,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1273092788] [2024-09-12 15:38:57,982 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:38:57,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:38:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:38:57,984 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:38:57,986 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2024-09-12 15:38:58,112 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2024-09-12 15:38:58,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:38:58,113 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:38:58,114 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:38:58,724 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:58,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:38:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:38:59,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1273092788] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:38:59,697 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:38:59,697 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-12 15:38:59,697 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853227465] [2024-09-12 15:38:59,697 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:38:59,697 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-12 15:38:59,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:38:59,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-12 15:38:59,698 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 15:38:59,699 INFO L87 Difference]: Start difference. First operand 763 states and 865 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:01,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:01,599 INFO L93 Difference]: Finished difference Result 869 states and 992 transitions. [2024-09-12 15:39:01,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:01,599 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-12 15:39:01,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:01,612 INFO L225 Difference]: With dead ends: 869 [2024-09-12 15:39:01,613 INFO L226 Difference]: Without dead ends: 856 [2024-09-12 15:39:01,622 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1161 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-12 15:39:01,622 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 1972 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 985 SdHoareTripleChecker+Invalid, 1991 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1972 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:01,622 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 985 Invalid, 1991 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1972 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:39:01,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2024-09-12 15:39:02,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 848. [2024-09-12 15:39:02,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 728 states have (on average 1.151098901098901) internal successors, (838), 802 states have internal predecessors, (838), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (84), 40 states have call predecessors, (84), 40 states have call successors, (84) [2024-09-12 15:39:02,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 964 transitions. [2024-09-12 15:39:02,050 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 964 transitions. Word has length 53 [2024-09-12 15:39:02,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:02,051 INFO L474 AbstractCegarLoop]: Abstraction has 848 states and 964 transitions. [2024-09-12 15:39:02,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:02,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:02,051 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 964 transitions. [2024-09-12 15:39:02,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:39:02,056 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:02,056 INFO L216 NwaCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:02,067 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:02,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,78 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:02,256 INFO L399 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:02,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:02,256 INFO L85 PathProgramCache]: Analyzing trace with hash -976047406, now seen corresponding path program 78 times [2024-09-12 15:39:02,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:02,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859334952] [2024-09-12 15:39:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:02,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:02,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:02,323 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:02,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:02,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:02,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:02,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:02,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859334952] [2024-09-12 15:39:02,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859334952] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:02,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969651752] [2024-09-12 15:39:02,692 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:02,692 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:02,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:02,693 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:02,693 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2024-09-12 15:39:02,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-12 15:39:02,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:02,772 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-12 15:39:02,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:03,356 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:03,357 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:04,367 INFO L134 CoverageAnalysis]: Checked inductivity of 125 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:04,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969651752] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:04,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:04,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 27, 27] total 72 [2024-09-12 15:39:04,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239954819] [2024-09-12 15:39:04,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:04,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2024-09-12 15:39:04,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:04,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2024-09-12 15:39:04,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4871, Unknown=0, NotChecked=0, Total=5112 [2024-09-12 15:39:04,369 INFO L87 Difference]: Start difference. First operand 848 states and 964 transitions. Second operand has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:06,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:06,275 INFO L93 Difference]: Finished difference Result 862 states and 978 transitions. [2024-09-12 15:39:06,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-12 15:39:06,276 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-09-12 15:39:06,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:06,280 INFO L225 Difference]: With dead ends: 862 [2024-09-12 15:39:06,280 INFO L226 Difference]: Without dead ends: 851 [2024-09-12 15:39:06,287 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1174 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=436, Invalid=7754, Unknown=0, NotChecked=0, Total=8190 [2024-09-12 15:39:06,287 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1348 mSDsCounter, 0 mSdLazyCounter, 2389 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1380 SdHoareTripleChecker+Invalid, 2408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 2389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:06,287 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1380 Invalid, 2408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 2389 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:39:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 851 states. [2024-09-12 15:39:06,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 851 to 849. [2024-09-12 15:39:06,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 849 states, 729 states have (on average 1.1508916323731138) internal successors, (839), 803 states have internal predecessors, (839), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-12 15:39:06,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 849 states to 849 states and 960 transitions. [2024-09-12 15:39:06,671 INFO L78 Accepts]: Start accepts. Automaton has 849 states and 960 transitions. Word has length 53 [2024-09-12 15:39:06,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:06,671 INFO L474 AbstractCegarLoop]: Abstraction has 849 states and 960 transitions. [2024-09-12 15:39:06,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.4166666666666667) internal successors, (102), 72 states have internal predecessors, (102), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:06,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:06,671 INFO L276 IsEmpty]: Start isEmpty. Operand 849 states and 960 transitions. [2024-09-12 15:39:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:39:06,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:06,676 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:06,688 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2024-09-12 15:39:06,877 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,79 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:06,877 INFO L399 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash 205782261, now seen corresponding path program 79 times [2024-09-12 15:39:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:06,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1361393224] [2024-09-12 15:39:06,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:06,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:06,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:06,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:06,912 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:06,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:06,914 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:06,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:06,981 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:06,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1361393224] [2024-09-12 15:39:06,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1361393224] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:06,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004602482] [2024-09-12 15:39:06,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:06,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:06,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:06,983 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:06,984 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2024-09-12 15:39:07,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:07,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:39:07,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:07,128 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:07,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:07,190 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:07,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004602482] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:07,190 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:07,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-12 15:39:07,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184899329] [2024-09-12 15:39:07,190 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:07,190 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:39:07,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:07,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:39:07,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:39:07,191 INFO L87 Difference]: Start difference. First operand 849 states and 960 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:39:07,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:07,672 INFO L93 Difference]: Finished difference Result 882 states and 1001 transitions. [2024-09-12 15:39:07,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:07,673 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 53 [2024-09-12 15:39:07,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:07,677 INFO L225 Difference]: With dead ends: 882 [2024-09-12 15:39:07,677 INFO L226 Difference]: Without dead ends: 854 [2024-09-12 15:39:07,684 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:39:07,684 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 78 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:07,684 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 216 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:39:07,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 854 states. [2024-09-12 15:39:08,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 854 to 844. [2024-09-12 15:39:08,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 844 states, 730 states have (on average 1.1452054794520548) internal successors, (836), 800 states have internal predecessors, (836), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-12 15:39:08,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 844 states to 844 states and 949 transitions. [2024-09-12 15:39:08,064 INFO L78 Accepts]: Start accepts. Automaton has 844 states and 949 transitions. Word has length 53 [2024-09-12 15:39:08,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:08,064 INFO L474 AbstractCegarLoop]: Abstraction has 844 states and 949 transitions. [2024-09-12 15:39:08,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:39:08,065 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:08,065 INFO L276 IsEmpty]: Start isEmpty. Operand 844 states and 949 transitions. [2024-09-12 15:39:08,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-09-12 15:39:08,069 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:08,069 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:08,081 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2024-09-12 15:39:08,270 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,80 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:08,270 INFO L399 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:08,270 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:08,270 INFO L85 PathProgramCache]: Analyzing trace with hash -229324870, now seen corresponding path program 80 times [2024-09-12 15:39:08,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:08,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956744187] [2024-09-12 15:39:08,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:08,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:08,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,302 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:08,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,303 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,372 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2024-09-12 15:39:08,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:08,375 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:08,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:08,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956744187] [2024-09-12 15:39:08,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956744187] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:08,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [419574419] [2024-09-12 15:39:08,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:08,376 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:08,376 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:08,377 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:08,377 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2024-09-12 15:39:08,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:08,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:08,456 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-12 15:39:08,457 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:08,516 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:08,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 21 proven. 15 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:08,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [419574419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:08,577 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:08,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 21 [2024-09-12 15:39:08,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039882305] [2024-09-12 15:39:08,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:08,578 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-12 15:39:08,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:08,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-12 15:39:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=267, Unknown=0, NotChecked=0, Total=420 [2024-09-12 15:39:08,578 INFO L87 Difference]: Start difference. First operand 844 states and 949 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:09,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:09,074 INFO L93 Difference]: Finished difference Result 1290 states and 1433 transitions. [2024-09-12 15:39:09,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:09,074 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 53 [2024-09-12 15:39:09,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:09,090 INFO L225 Difference]: With dead ends: 1290 [2024-09-12 15:39:09,090 INFO L226 Difference]: Without dead ends: 855 [2024-09-12 15:39:09,098 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 94 SyntacticMatches, 13 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=448, Invalid=812, Unknown=0, NotChecked=0, Total=1260 [2024-09-12 15:39:09,098 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 44 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 128 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:09,098 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 204 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 128 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:39:09,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-12 15:39:09,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-12 15:39:09,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (73), 38 states have call predecessors, (73), 38 states have call successors, (73) [2024-09-12 15:39:09,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 960 transitions. [2024-09-12 15:39:09,488 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 960 transitions. Word has length 53 [2024-09-12 15:39:09,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:09,489 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 960 transitions. [2024-09-12 15:39:09,489 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:09,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:09,489 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 960 transitions. [2024-09-12 15:39:09,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:09,494 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:09,494 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:09,506 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2024-09-12 15:39:09,694 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,81 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:09,694 INFO L399 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:09,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:09,694 INFO L85 PathProgramCache]: Analyzing trace with hash 859920453, now seen corresponding path program 81 times [2024-09-12 15:39:09,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:09,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925312925] [2024-09-12 15:39:09,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:09,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:09,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:09,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:09,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:09,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:09,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:09,933 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:10,178 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:10,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925312925] [2024-09-12 15:39:10,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925312925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:10,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025827056] [2024-09-12 15:39:10,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:10,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:10,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:10,181 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:10,181 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2024-09-12 15:39:10,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:39:10,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:10,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 15:39:10,265 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:10,418 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:10,418 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:10,540 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 134 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:10,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025827056] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:10,540 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:10,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 44 [2024-09-12 15:39:10,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805385829] [2024-09-12 15:39:10,540 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:10,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:10,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:10,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:10,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1797, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:10,541 INFO L87 Difference]: Start difference. First operand 855 states and 960 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:11,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:11,684 INFO L93 Difference]: Finished difference Result 967 states and 1087 transitions. [2024-09-12 15:39:11,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-12 15:39:11,684 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:11,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:11,691 INFO L225 Difference]: With dead ends: 967 [2024-09-12 15:39:11,691 INFO L226 Difference]: Without dead ends: 961 [2024-09-12 15:39:11,699 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=2329, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:11,699 INFO L434 NwaCegarLoop]: 107 mSDtfsCounter, 117 mSDsluCounter, 3877 mSDsCounter, 0 mSdLazyCounter, 2920 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3984 SdHoareTripleChecker+Invalid, 2921 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2920 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:11,699 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 3984 Invalid, 2921 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2920 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:39:11,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 961 states. [2024-09-12 15:39:12,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 961 to 869. [2024-09-12 15:39:12,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 869 states, 752 states have (on average 1.1436170212765957) internal successors, (860), 824 states have internal predecessors, (860), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (76), 39 states have call predecessors, (76), 39 states have call successors, (76) [2024-09-12 15:39:12,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 869 states to 869 states and 977 transitions. [2024-09-12 15:39:12,066 INFO L78 Accepts]: Start accepts. Automaton has 869 states and 977 transitions. Word has length 54 [2024-09-12 15:39:12,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:12,066 INFO L474 AbstractCegarLoop]: Abstraction has 869 states and 977 transitions. [2024-09-12 15:39:12,066 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:12,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:12,067 INFO L276 IsEmpty]: Start isEmpty. Operand 869 states and 977 transitions. [2024-09-12 15:39:12,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:12,072 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:12,072 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:12,084 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:12,272 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,82 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:12,272 INFO L399 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:12,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:12,273 INFO L85 PathProgramCache]: Analyzing trace with hash -1993786783, now seen corresponding path program 82 times [2024-09-12 15:39:12,273 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:12,273 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288757495] [2024-09-12 15:39:12,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:12,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:12,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,373 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:12,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,374 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:12,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:12,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:12,722 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:12,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288757495] [2024-09-12 15:39:12,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288757495] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:12,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720722811] [2024-09-12 15:39:12,722 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:12,722 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:12,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:12,723 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:12,724 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2024-09-12 15:39:12,802 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:12,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:12,803 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 15:39:12,804 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:13,015 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:13,015 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 96 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:13,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720722811] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:13,137 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:13,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 44 [2024-09-12 15:39:13,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205486483] [2024-09-12 15:39:13,137 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:13,137 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:13,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1793, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:13,138 INFO L87 Difference]: Start difference. First operand 869 states and 977 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:14,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:14,139 INFO L93 Difference]: Finished difference Result 875 states and 982 transitions. [2024-09-12 15:39:14,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:39:14,139 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:14,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:14,144 INFO L225 Difference]: With dead ends: 875 [2024-09-12 15:39:14,144 INFO L226 Difference]: Without dead ends: 855 [2024-09-12 15:39:14,154 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=2325, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:14,154 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 96 mSDsluCounter, 3225 mSDsCounter, 0 mSdLazyCounter, 2457 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 3320 SdHoareTripleChecker+Invalid, 2458 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:14,154 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [97 Valid, 3320 Invalid, 2458 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2457 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:39:14,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 855 states. [2024-09-12 15:39:14,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 855 to 855. [2024-09-12 15:39:14,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 855 states, 741 states have (on average 1.1430499325236168) internal successors, (847), 811 states have internal predecessors, (847), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (74), 38 states have call predecessors, (74), 38 states have call successors, (74) [2024-09-12 15:39:14,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 855 states to 855 states and 961 transitions. [2024-09-12 15:39:14,515 INFO L78 Accepts]: Start accepts. Automaton has 855 states and 961 transitions. Word has length 54 [2024-09-12 15:39:14,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:14,515 INFO L474 AbstractCegarLoop]: Abstraction has 855 states and 961 transitions. [2024-09-12 15:39:14,515 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:14,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:14,516 INFO L276 IsEmpty]: Start isEmpty. Operand 855 states and 961 transitions. [2024-09-12 15:39:14,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:14,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:14,520 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:14,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2024-09-12 15:39:14,721 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,83 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:14,721 INFO L399 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:14,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:14,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1858550853, now seen corresponding path program 83 times [2024-09-12 15:39:14,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:14,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082899833] [2024-09-12 15:39:14,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:14,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:14,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,855 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:14,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:14,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:15,228 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:15,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082899833] [2024-09-12 15:39:15,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082899833] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:15,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800425018] [2024-09-12 15:39:15,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:15,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:15,229 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:15,229 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:15,230 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2024-09-12 15:39:15,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:39:15,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:15,316 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 15:39:15,317 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:15,546 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:15,547 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:15,659 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:15,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800425018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:15,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:15,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 44 [2024-09-12 15:39:15,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7794946] [2024-09-12 15:39:15,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:15,659 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:15,659 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:15,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:15,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1789, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:15,660 INFO L87 Difference]: Start difference. First operand 855 states and 961 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:16,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:16,526 INFO L93 Difference]: Finished difference Result 861 states and 966 transitions. [2024-09-12 15:39:16,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:39:16,526 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:16,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:16,530 INFO L225 Difference]: With dead ends: 861 [2024-09-12 15:39:16,530 INFO L226 Difference]: Without dead ends: 839 [2024-09-12 15:39:16,536 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=2321, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:16,537 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2502 mSDsCounter, 0 mSdLazyCounter, 1987 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 1988 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:16,537 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2581 Invalid, 1988 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1987 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:39:16,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 839 states. [2024-09-12 15:39:16,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 839 to 839. [2024-09-12 15:39:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 839 states, 728 states have (on average 1.1428571428571428) internal successors, (832), 796 states have internal predecessors, (832), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (72), 37 states have call predecessors, (72), 37 states have call successors, (72) [2024-09-12 15:39:16,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 839 states to 839 states and 943 transitions. [2024-09-12 15:39:16,928 INFO L78 Accepts]: Start accepts. Automaton has 839 states and 943 transitions. Word has length 54 [2024-09-12 15:39:16,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:16,928 INFO L474 AbstractCegarLoop]: Abstraction has 839 states and 943 transitions. [2024-09-12 15:39:16,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:16,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:16,929 INFO L276 IsEmpty]: Start isEmpty. Operand 839 states and 943 transitions. [2024-09-12 15:39:16,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:16,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:16,933 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:16,945 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2024-09-12 15:39:17,133 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,84 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:17,134 INFO L399 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:17,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:17,134 INFO L85 PathProgramCache]: Analyzing trace with hash -295057823, now seen corresponding path program 84 times [2024-09-12 15:39:17,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:17,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535526454] [2024-09-12 15:39:17,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:17,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:17,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,229 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,230 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:17,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,336 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:17,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:17,517 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:17,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535526454] [2024-09-12 15:39:17,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535526454] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:17,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937703033] [2024-09-12 15:39:17,518 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:17,518 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:17,518 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:17,519 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:17,520 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2024-09-12 15:39:17,599 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:39:17,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:17,600 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:39:17,601 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:17,862 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:17,862 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:17,971 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:17,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937703033] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:17,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:17,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 44 [2024-09-12 15:39:17,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356229218] [2024-09-12 15:39:17,972 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:17,972 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:17,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:17,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:17,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1785, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:17,972 INFO L87 Difference]: Start difference. First operand 839 states and 943 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:18,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:18,754 INFO L93 Difference]: Finished difference Result 845 states and 948 transitions. [2024-09-12 15:39:18,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:39:18,754 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:18,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:18,758 INFO L225 Difference]: With dead ends: 845 [2024-09-12 15:39:18,758 INFO L226 Difference]: Without dead ends: 821 [2024-09-12 15:39:18,764 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=2317, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:18,764 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 56 mSDsluCounter, 1985 mSDsCounter, 0 mSdLazyCounter, 1638 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 2048 SdHoareTripleChecker+Invalid, 1639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:18,764 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 2048 Invalid, 1639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1638 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:39:18,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2024-09-12 15:39:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 821. [2024-09-12 15:39:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 821 states, 713 states have (on average 1.1430575035063113) internal successors, (815), 779 states have internal predecessors, (815), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (70), 36 states have call predecessors, (70), 36 states have call successors, (70) [2024-09-12 15:39:19,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 821 states to 821 states and 923 transitions. [2024-09-12 15:39:19,145 INFO L78 Accepts]: Start accepts. Automaton has 821 states and 923 transitions. Word has length 54 [2024-09-12 15:39:19,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:19,146 INFO L474 AbstractCegarLoop]: Abstraction has 821 states and 923 transitions. [2024-09-12 15:39:19,146 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:19,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:19,146 INFO L276 IsEmpty]: Start isEmpty. Operand 821 states and 923 transitions. [2024-09-12 15:39:19,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:19,150 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:19,150 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:19,163 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2024-09-12 15:39:19,350 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,85 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:19,351 INFO L399 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:19,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:19,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1620066373, now seen corresponding path program 85 times [2024-09-12 15:39:19,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:19,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731015470] [2024-09-12 15:39:19,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:19,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:19,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:19,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,444 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:19,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,705 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:19,706 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:19,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731015470] [2024-09-12 15:39:19,706 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731015470] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:19,706 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349684795] [2024-09-12 15:39:19,706 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:19,706 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:19,706 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:19,707 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:19,708 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2024-09-12 15:39:19,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:19,789 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:39:19,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:20,080 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:20,183 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:20,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349684795] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:20,183 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:20,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 44 [2024-09-12 15:39:20,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698976185] [2024-09-12 15:39:20,184 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:20,184 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:20,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:20,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:20,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1781, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:20,185 INFO L87 Difference]: Start difference. First operand 821 states and 923 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:20,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:20,896 INFO L93 Difference]: Finished difference Result 827 states and 928 transitions. [2024-09-12 15:39:20,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:39:20,897 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:20,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:20,901 INFO L225 Difference]: With dead ends: 827 [2024-09-12 15:39:20,901 INFO L226 Difference]: Without dead ends: 801 [2024-09-12 15:39:20,908 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2313, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:20,908 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 37 mSDsluCounter, 1427 mSDsCounter, 0 mSdLazyCounter, 1235 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 1474 SdHoareTripleChecker+Invalid, 1236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:20,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 1474 Invalid, 1236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1235 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 801 states. [2024-09-12 15:39:21,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 801 to 801. [2024-09-12 15:39:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 801 states, 696 states have (on average 1.1436781609195403) internal successors, (796), 760 states have internal predecessors, (796), 37 states have call successors, (37), 5 states have call predecessors, (37), 67 states have return successors, (68), 35 states have call predecessors, (68), 35 states have call successors, (68) [2024-09-12 15:39:21,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 801 states to 801 states and 901 transitions. [2024-09-12 15:39:21,250 INFO L78 Accepts]: Start accepts. Automaton has 801 states and 901 transitions. Word has length 54 [2024-09-12 15:39:21,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:21,250 INFO L474 AbstractCegarLoop]: Abstraction has 801 states and 901 transitions. [2024-09-12 15:39:21,250 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:21,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:21,250 INFO L276 IsEmpty]: Start isEmpty. Operand 801 states and 901 transitions. [2024-09-12 15:39:21,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2024-09-12 15:39:21,254 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:21,255 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:21,267 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2024-09-12 15:39:21,455 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,86 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:21,455 INFO L399 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:21,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:21,455 INFO L85 PathProgramCache]: Analyzing trace with hash -1081658783, now seen corresponding path program 86 times [2024-09-12 15:39:21,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704826414] [2024-09-12 15:39:21,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:21,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:21,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:21,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:21,777 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:21,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704826414] [2024-09-12 15:39:21,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704826414] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:21,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664836481] [2024-09-12 15:39:21,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:21,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:21,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:21,778 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:21,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2024-09-12 15:39:21,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:21,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 51 conjuncts are in the unsatisfiable core [2024-09-12 15:39:21,861 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:22,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:22,278 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:22,279 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664836481] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:22,279 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:22,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 44 [2024-09-12 15:39:22,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816102731] [2024-09-12 15:39:22,279 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:22,279 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-12 15:39:22,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:22,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-12 15:39:22,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1777, Unknown=0, NotChecked=0, Total=1892 [2024-09-12 15:39:22,280 INFO L87 Difference]: Start difference. First operand 801 states and 901 transitions. Second operand has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:22,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:22,901 INFO L93 Difference]: Finished difference Result 817 states and 920 transitions. [2024-09-12 15:39:22,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-12 15:39:22,901 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 54 [2024-09-12 15:39:22,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:22,908 INFO L225 Difference]: With dead ends: 817 [2024-09-12 15:39:22,908 INFO L226 Difference]: Without dead ends: 811 [2024-09-12 15:39:22,914 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=2309, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:22,914 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 782 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 808 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:22,914 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 810 Invalid, 808 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-12 15:39:22,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 811 states. [2024-09-12 15:39:23,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 811 to 809. [2024-09-12 15:39:23,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 701 states have (on average 1.145506419400856) internal successors, (803), 767 states have internal predecessors, (803), 38 states have call successors, (38), 5 states have call predecessors, (38), 69 states have return successors, (71), 36 states have call predecessors, (71), 36 states have call successors, (71) [2024-09-12 15:39:23,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 912 transitions. [2024-09-12 15:39:23,260 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 912 transitions. Word has length 54 [2024-09-12 15:39:23,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:23,261 INFO L474 AbstractCegarLoop]: Abstraction has 809 states and 912 transitions. [2024-09-12 15:39:23,261 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 39 states have (on average 1.358974358974359) internal successors, (53), 39 states have internal predecessors, (53), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:23,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:23,261 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 912 transitions. [2024-09-12 15:39:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:39:23,265 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:23,265 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:23,277 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2024-09-12 15:39:23,465 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2024-09-12 15:39:23,466 INFO L399 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:23,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:23,466 INFO L85 PathProgramCache]: Analyzing trace with hash 1940349234, now seen corresponding path program 87 times [2024-09-12 15:39:23,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:23,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116390152] [2024-09-12 15:39:23,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:23,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:23,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:23,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,685 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:23,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:23,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:23,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116390152] [2024-09-12 15:39:23,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116390152] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:23,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841717202] [2024-09-12 15:39:23,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:23,957 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:23,957 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:23,958 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:23,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2024-09-12 15:39:24,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-12 15:39:24,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:24,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:39:24,042 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:24,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:25,882 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:25,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841717202] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:25,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:25,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-12 15:39:25,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250568588] [2024-09-12 15:39:25,883 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:25,883 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-12 15:39:25,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:25,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-12 15:39:25,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-12 15:39:25,884 INFO L87 Difference]: Start difference. First operand 809 states and 912 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:28,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:28,027 INFO L93 Difference]: Finished difference Result 917 states and 1041 transitions. [2024-09-12 15:39:28,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:28,027 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-12 15:39:28,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:28,041 INFO L225 Difference]: With dead ends: 917 [2024-09-12 15:39:28,041 INFO L226 Difference]: Without dead ends: 904 [2024-09-12 15:39:28,048 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1386 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-12 15:39:28,048 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 981 mSDsCounter, 0 mSdLazyCounter, 2246 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1008 SdHoareTripleChecker+Invalid, 2267 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:28,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1008 Invalid, 2267 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2246 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:39:28,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2024-09-12 15:39:28,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 896. [2024-09-12 15:39:28,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 776 states have (on average 1.1443298969072164) internal successors, (888), 850 states have internal predecessors, (888), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (83), 40 states have call predecessors, (83), 40 states have call successors, (83) [2024-09-12 15:39:28,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1013 transitions. [2024-09-12 15:39:28,450 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1013 transitions. Word has length 55 [2024-09-12 15:39:28,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:28,450 INFO L474 AbstractCegarLoop]: Abstraction has 896 states and 1013 transitions. [2024-09-12 15:39:28,450 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:28,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:28,451 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1013 transitions. [2024-09-12 15:39:28,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:39:28,456 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:28,456 INFO L216 NwaCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:28,468 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:28,656 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2024-09-12 15:39:28,656 INFO L399 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:28,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:28,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1182927429, now seen corresponding path program 88 times [2024-09-12 15:39:28,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:28,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033212785] [2024-09-12 15:39:28,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:28,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:28,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:28,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:28,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:28,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:28,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:28,887 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:28,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:29,138 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:29,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033212785] [2024-09-12 15:39:29,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033212785] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:29,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1071738735] [2024-09-12 15:39:29,138 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:29,138 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:29,138 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:29,139 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:29,140 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2024-09-12 15:39:29,219 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:29,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:29,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-12 15:39:29,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:29,903 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:29,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:31,085 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:39:31,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1071738735] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:31,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:31,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 29, 29] total 78 [2024-09-12 15:39:31,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934172010] [2024-09-12 15:39:31,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:31,086 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2024-09-12 15:39:31,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:31,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2024-09-12 15:39:31,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=262, Invalid=5744, Unknown=0, NotChecked=0, Total=6006 [2024-09-12 15:39:31,087 INFO L87 Difference]: Start difference. First operand 896 states and 1013 transitions. Second operand has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:33,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:33,232 INFO L93 Difference]: Finished difference Result 910 states and 1027 transitions. [2024-09-12 15:39:33,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-12 15:39:33,232 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 55 [2024-09-12 15:39:33,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:33,237 INFO L225 Difference]: With dead ends: 910 [2024-09-12 15:39:33,237 INFO L226 Difference]: Without dead ends: 899 [2024-09-12 15:39:33,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1400 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=488, Invalid=9214, Unknown=0, NotChecked=0, Total=9702 [2024-09-12 15:39:33,244 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 2330 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1256 SdHoareTripleChecker+Invalid, 2351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 2330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:33,244 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1256 Invalid, 2351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 2330 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:39:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2024-09-12 15:39:33,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 897. [2024-09-12 15:39:33,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 777 states have (on average 1.1441441441441442) internal successors, (889), 851 states have internal predecessors, (889), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-12 15:39:33,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1009 transitions. [2024-09-12 15:39:33,685 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1009 transitions. Word has length 55 [2024-09-12 15:39:33,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:33,686 INFO L474 AbstractCegarLoop]: Abstraction has 897 states and 1009 transitions. [2024-09-12 15:39:33,686 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3846153846153846) internal successors, (108), 78 states have internal predecessors, (108), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:33,686 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:33,686 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1009 transitions. [2024-09-12 15:39:33,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:39:33,691 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:33,691 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:33,703 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2024-09-12 15:39:33,891 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,89 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:33,891 INFO L399 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:33,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:33,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1734206310, now seen corresponding path program 89 times [2024-09-12 15:39:33,892 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:33,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641696001] [2024-09-12 15:39:33,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:33,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:33,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:33,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:33,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:34,002 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:34,005 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:34,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641696001] [2024-09-12 15:39:34,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641696001] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:34,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063967235] [2024-09-12 15:39:34,005 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:34,005 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:34,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:34,006 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:34,007 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2024-09-12 15:39:34,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:39:34,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:34,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 15:39:34,093 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:34,172 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:34,172 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:34,235 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:34,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063967235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:34,236 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:34,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-12 15:39:34,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452493808] [2024-09-12 15:39:34,236 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:34,236 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:39:34,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:34,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:39:34,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:39:34,236 INFO L87 Difference]: Start difference. First operand 897 states and 1009 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:34,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:34,913 INFO L93 Difference]: Finished difference Result 1477 states and 1656 transitions. [2024-09-12 15:39:34,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:39:34,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 55 [2024-09-12 15:39:34,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:34,936 INFO L225 Difference]: With dead ends: 1477 [2024-09-12 15:39:34,937 INFO L226 Difference]: Without dead ends: 1007 [2024-09-12 15:39:34,945 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:39:34,946 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 27 mSDsluCounter, 268 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:34,946 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 306 Invalid, 274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:39:34,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2024-09-12 15:39:35,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 1007. [2024-09-12 15:39:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1007 states, 887 states have (on average 1.1409244644870349) internal successors, (1012), 961 states have internal predecessors, (1012), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-12 15:39:35,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1007 states to 1007 states and 1132 transitions. [2024-09-12 15:39:35,406 INFO L78 Accepts]: Start accepts. Automaton has 1007 states and 1132 transitions. Word has length 55 [2024-09-12 15:39:35,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:35,406 INFO L474 AbstractCegarLoop]: Abstraction has 1007 states and 1132 transitions. [2024-09-12 15:39:35,406 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 23 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:35,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:35,406 INFO L276 IsEmpty]: Start isEmpty. Operand 1007 states and 1132 transitions. [2024-09-12 15:39:35,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-12 15:39:35,411 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:35,411 INFO L216 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:35,423 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2024-09-12 15:39:35,612 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,90 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:35,612 INFO L399 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:35,612 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash 1957341813, now seen corresponding path program 90 times [2024-09-12 15:39:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599102921] [2024-09-12 15:39:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:35,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:35,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:35,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:35,726 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:35,726 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599102921] [2024-09-12 15:39:35,726 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599102921] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:35,726 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805253638] [2024-09-12 15:39:35,726 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:35,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:35,727 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:35,727 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:35,728 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2024-09-12 15:39:35,814 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:39:35,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:35,815 INFO L262 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-09-12 15:39:35,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:35,893 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:35,957 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2024-09-12 15:39:35,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805253638] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:35,958 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:35,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 23 [2024-09-12 15:39:35,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569896797] [2024-09-12 15:39:35,958 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:35,958 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-12 15:39:35,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:35,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-12 15:39:35,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=365, Unknown=0, NotChecked=0, Total=506 [2024-09-12 15:39:35,958 INFO L87 Difference]: Start difference. First operand 1007 states and 1132 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:39:36,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:36,668 INFO L93 Difference]: Finished difference Result 1159 states and 1321 transitions. [2024-09-12 15:39:36,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-12 15:39:36,668 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 55 [2024-09-12 15:39:36,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:36,673 INFO L225 Difference]: With dead ends: 1159 [2024-09-12 15:39:36,674 INFO L226 Difference]: Without dead ends: 1117 [2024-09-12 15:39:36,682 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 97 SyntacticMatches, 13 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=511, Invalid=1295, Unknown=0, NotChecked=0, Total=1806 [2024-09-12 15:39:36,682 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 29 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:36,682 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 190 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:39:36,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-12 15:39:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-12 15:39:37,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (78), 40 states have call predecessors, (78), 40 states have call successors, (78) [2024-09-12 15:39:37,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1255 transitions. [2024-09-12 15:39:37,228 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1255 transitions. Word has length 55 [2024-09-12 15:39:37,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:37,228 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1255 transitions. [2024-09-12 15:39:37,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:39:37,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:37,229 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1255 transitions. [2024-09-12 15:39:37,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:37,235 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:37,235 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:37,247 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:37,436 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,91 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:37,436 INFO L399 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:37,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:37,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1258392964, now seen corresponding path program 91 times [2024-09-12 15:39:37,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:37,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641634341] [2024-09-12 15:39:37,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:37,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,554 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,555 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:37,998 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:37,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641634341] [2024-09-12 15:39:37,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641634341] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:37,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767004220] [2024-09-12 15:39:37,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:37,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:37,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:38,000 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:38,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2024-09-12 15:39:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:38,086 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 15:39:38,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:38,255 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:38,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 160 backedges. 0 proven. 158 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:39:38,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767004220] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:38,384 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:38,384 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 46 [2024-09-12 15:39:38,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789019475] [2024-09-12 15:39:38,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:38,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:38,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:38,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:38,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1971, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:38,385 INFO L87 Difference]: Start difference. First operand 1117 states and 1255 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:39,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:39,778 INFO L93 Difference]: Finished difference Result 1247 states and 1402 transitions. [2024-09-12 15:39:39,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 15:39:39,779 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:39,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:39,788 INFO L225 Difference]: With dead ends: 1247 [2024-09-12 15:39:39,788 INFO L226 Difference]: Without dead ends: 1241 [2024-09-12 15:39:39,797 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=2527, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:39,797 INFO L434 NwaCegarLoop]: 117 mSDtfsCounter, 128 mSDsluCounter, 4344 mSDsCounter, 0 mSdLazyCounter, 3255 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 4461 SdHoareTripleChecker+Invalid, 3256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:39,797 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 4461 Invalid, 3256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3255 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:39:39,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1241 states. [2024-09-12 15:39:40,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1241 to 1131. [2024-09-12 15:39:40,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1008 states have (on average 1.1388888888888888) internal successors, (1148), 1084 states have internal predecessors, (1148), 43 states have call successors, (43), 5 states have call predecessors, (43), 79 states have return successors, (81), 41 states have call predecessors, (81), 41 states have call successors, (81) [2024-09-12 15:39:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 1272 transitions. [2024-09-12 15:39:40,351 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 1272 transitions. Word has length 56 [2024-09-12 15:39:40,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:40,351 INFO L474 AbstractCegarLoop]: Abstraction has 1131 states and 1272 transitions. [2024-09-12 15:39:40,351 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:40,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:40,351 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 1272 transitions. [2024-09-12 15:39:40,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:40,358 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:40,358 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:40,370 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2024-09-12 15:39:40,558 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2024-09-12 15:39:40,559 INFO L399 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:40,559 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:40,559 INFO L85 PathProgramCache]: Analyzing trace with hash 2056222844, now seen corresponding path program 92 times [2024-09-12 15:39:40,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:40,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045650592] [2024-09-12 15:39:40,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:40,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:40,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,666 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:40,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,667 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:40,805 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:40,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:41,055 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:41,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:41,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045650592] [2024-09-12 15:39:41,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045650592] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:41,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369261479] [2024-09-12 15:39:41,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:41,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:41,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:41,057 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:41,057 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2024-09-12 15:39:41,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:41,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:41,143 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 15:39:41,144 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:41,357 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:41,358 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 116 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:39:41,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [369261479] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:41,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:41,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 46 [2024-09-12 15:39:41,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159519493] [2024-09-12 15:39:41,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:41,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:41,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:41,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:41,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1967, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:41,482 INFO L87 Difference]: Start difference. First operand 1131 states and 1272 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:42,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:42,729 INFO L93 Difference]: Finished difference Result 1137 states and 1277 transitions. [2024-09-12 15:39:42,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-12 15:39:42,730 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:42,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:42,735 INFO L225 Difference]: With dead ends: 1137 [2024-09-12 15:39:42,735 INFO L226 Difference]: Without dead ends: 1117 [2024-09-12 15:39:42,743 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=129, Invalid=2523, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:42,744 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3722 mSDsCounter, 0 mSdLazyCounter, 2879 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3823 SdHoareTripleChecker+Invalid, 2880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:42,744 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3823 Invalid, 2880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2879 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:39:42,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1117 states. [2024-09-12 15:39:43,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1117 to 1117. [2024-09-12 15:39:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 997 states have (on average 1.1384152457372116) internal successors, (1135), 1071 states have internal predecessors, (1135), 42 states have call successors, (42), 5 states have call predecessors, (42), 77 states have return successors, (79), 40 states have call predecessors, (79), 40 states have call successors, (79) [2024-09-12 15:39:43,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1256 transitions. [2024-09-12 15:39:43,257 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1256 transitions. Word has length 56 [2024-09-12 15:39:43,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:43,257 INFO L474 AbstractCegarLoop]: Abstraction has 1117 states and 1256 transitions. [2024-09-12 15:39:43,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:43,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:43,257 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1256 transitions. [2024-09-12 15:39:43,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:43,264 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:43,264 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:43,276 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2024-09-12 15:39:43,464 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 93 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2024-09-12 15:39:43,464 INFO L399 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:43,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:43,465 INFO L85 PathProgramCache]: Analyzing trace with hash 114260604, now seen corresponding path program 93 times [2024-09-12 15:39:43,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:43,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143185588] [2024-09-12 15:39:43,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:43,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:43,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:43,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:43,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:43,576 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:43,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:43,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:43,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:43,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143185588] [2024-09-12 15:39:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143185588] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371474542] [2024-09-12 15:39:43,933 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:39:43,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:43,933 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:43,934 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:43,938 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2024-09-12 15:39:44,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:39:44,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:44,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 15:39:44,024 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:44,262 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:44,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:44,384 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:39:44,385 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1371474542] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:44,385 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:44,385 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 46 [2024-09-12 15:39:44,385 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045618692] [2024-09-12 15:39:44,385 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:44,385 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:44,385 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:44,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:44,386 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1963, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:44,386 INFO L87 Difference]: Start difference. First operand 1117 states and 1256 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:45,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:45,545 INFO L93 Difference]: Finished difference Result 1123 states and 1261 transitions. [2024-09-12 15:39:45,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:39:45,546 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:45,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:45,551 INFO L225 Difference]: With dead ends: 1123 [2024-09-12 15:39:45,552 INFO L226 Difference]: Without dead ends: 1101 [2024-09-12 15:39:45,561 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:45,561 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 87 mSDsluCounter, 3024 mSDsCounter, 0 mSdLazyCounter, 2422 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 3109 SdHoareTripleChecker+Invalid, 2423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:45,561 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 3109 Invalid, 2423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2422 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:39:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-12 15:39:46,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1101. [2024-09-12 15:39:46,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1101 states, 984 states have (on average 1.1382113821138211) internal successors, (1120), 1056 states have internal predecessors, (1120), 41 states have call successors, (41), 5 states have call predecessors, (41), 75 states have return successors, (77), 39 states have call predecessors, (77), 39 states have call successors, (77) [2024-09-12 15:39:46,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1101 states to 1101 states and 1238 transitions. [2024-09-12 15:39:46,101 INFO L78 Accepts]: Start accepts. Automaton has 1101 states and 1238 transitions. Word has length 56 [2024-09-12 15:39:46,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:46,101 INFO L474 AbstractCegarLoop]: Abstraction has 1101 states and 1238 transitions. [2024-09-12 15:39:46,102 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:46,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:46,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1101 states and 1238 transitions. [2024-09-12 15:39:46,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:46,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:46,108 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:46,120 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:46,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2024-09-12 15:39:46,309 INFO L399 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:46,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:46,309 INFO L85 PathProgramCache]: Analyzing trace with hash 129396860, now seen corresponding path program 94 times [2024-09-12 15:39:46,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:46,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599823790] [2024-09-12 15:39:46,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:46,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:46,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:46,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:46,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:46,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:46,733 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:46,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:46,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599823790] [2024-09-12 15:39:46,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599823790] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:46,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593374167] [2024-09-12 15:39:46,734 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:39:46,734 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:46,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:46,735 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:46,736 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2024-09-12 15:39:46,820 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:39:46,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:46,821 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 15:39:46,822 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:47,106 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:47,106 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:47,221 INFO L134 CoverageAnalysis]: Checked inductivity of 82 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:39:47,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1593374167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:47,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:47,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 46 [2024-09-12 15:39:47,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267225860] [2024-09-12 15:39:47,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:47,222 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:47,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:47,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1959, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:47,223 INFO L87 Difference]: Start difference. First operand 1101 states and 1238 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:48,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:48,455 INFO L93 Difference]: Finished difference Result 1107 states and 1243 transitions. [2024-09-12 15:39:48,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:39:48,455 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:48,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:48,460 INFO L225 Difference]: With dead ends: 1107 [2024-09-12 15:39:48,460 INFO L226 Difference]: Without dead ends: 1083 [2024-09-12 15:39:48,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=137, Invalid=2515, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:48,469 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 66 mSDsluCounter, 2196 mSDsCounter, 0 mSdLazyCounter, 1834 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 2265 SdHoareTripleChecker+Invalid, 1835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:48,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 2265 Invalid, 1835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1834 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:39:48,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1083 states. [2024-09-12 15:39:48,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1083 to 1083. [2024-09-12 15:39:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1083 states, 969 states have (on average 1.1382868937048503) internal successors, (1103), 1039 states have internal predecessors, (1103), 40 states have call successors, (40), 5 states have call predecessors, (40), 73 states have return successors, (75), 38 states have call predecessors, (75), 38 states have call successors, (75) [2024-09-12 15:39:48,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1083 states to 1083 states and 1218 transitions. [2024-09-12 15:39:48,964 INFO L78 Accepts]: Start accepts. Automaton has 1083 states and 1218 transitions. Word has length 56 [2024-09-12 15:39:48,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:48,965 INFO L474 AbstractCegarLoop]: Abstraction has 1083 states and 1218 transitions. [2024-09-12 15:39:48,965 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:48,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:48,965 INFO L276 IsEmpty]: Start isEmpty. Operand 1083 states and 1218 transitions. [2024-09-12 15:39:48,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:48,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:48,971 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:48,982 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2024-09-12 15:39:49,171 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2024-09-12 15:39:49,171 INFO L399 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:49,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:49,172 INFO L85 PathProgramCache]: Analyzing trace with hash 47219324, now seen corresponding path program 95 times [2024-09-12 15:39:49,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:49,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598410100] [2024-09-12 15:39:49,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:49,172 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,275 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:49,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:49,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:49,578 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:49,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:49,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598410100] [2024-09-12 15:39:49,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [598410100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:49,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079471305] [2024-09-12 15:39:49,579 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:39:49,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:49,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:49,580 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:49,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2024-09-12 15:39:49,668 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:39:49,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:49,669 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 62 conjuncts are in the unsatisfiable core [2024-09-12 15:39:49,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:50,014 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:50,014 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:39:50,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079471305] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:50,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:50,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 46 [2024-09-12 15:39:50,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745422622] [2024-09-12 15:39:50,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:50,087 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:50,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:50,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:50,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1955, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:50,087 INFO L87 Difference]: Start difference. First operand 1083 states and 1218 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:50,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:50,965 INFO L93 Difference]: Finished difference Result 1089 states and 1223 transitions. [2024-09-12 15:39:50,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:39:50,965 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:50,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:50,971 INFO L225 Difference]: With dead ends: 1089 [2024-09-12 15:39:50,971 INFO L226 Difference]: Without dead ends: 1063 [2024-09-12 15:39:50,979 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=141, Invalid=2511, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:50,980 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1563 mSDsCounter, 0 mSdLazyCounter, 1452 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1613 SdHoareTripleChecker+Invalid, 1453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:50,980 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1613 Invalid, 1453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1452 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:50,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2024-09-12 15:39:51,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 1063. [2024-09-12 15:39:51,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 952 states have (on average 1.138655462184874) internal successors, (1084), 1020 states have internal predecessors, (1084), 39 states have call successors, (39), 5 states have call predecessors, (39), 71 states have return successors, (73), 37 states have call predecessors, (73), 37 states have call successors, (73) [2024-09-12 15:39:51,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 1196 transitions. [2024-09-12 15:39:51,514 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 1196 transitions. Word has length 56 [2024-09-12 15:39:51,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:51,514 INFO L474 AbstractCegarLoop]: Abstraction has 1063 states and 1196 transitions. [2024-09-12 15:39:51,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:51,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:51,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 1196 transitions. [2024-09-12 15:39:51,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:51,520 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:51,520 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:51,532 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2024-09-12 15:39:51,720 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,96 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:51,720 INFO L399 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:51,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:51,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2023403059, now seen corresponding path program 96 times [2024-09-12 15:39:51,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:51,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723597319] [2024-09-12 15:39:51,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:51,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:51,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:51,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-12 15:39:51,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:52,030 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-12 15:39:52,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723597319] [2024-09-12 15:39:52,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723597319] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:52,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599616945] [2024-09-12 15:39:52,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:39:52,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:52,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:52,032 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:52,032 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2024-09-12 15:39:52,117 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:39:52,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:52,118 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:39:52,119 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:52,426 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 15:39:52,426 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 15:39:52,928 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599616945] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:52,928 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:52,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-12 15:39:52,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257849215] [2024-09-12 15:39:52,929 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:52,929 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:39:52,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:52,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:39:52,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:52,929 INFO L87 Difference]: Start difference. First operand 1063 states and 1196 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:54,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:54,144 INFO L93 Difference]: Finished difference Result 1143 states and 1298 transitions. [2024-09-12 15:39:54,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:54,145 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-12 15:39:54,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:54,174 INFO L225 Difference]: With dead ends: 1143 [2024-09-12 15:39:54,174 INFO L226 Difference]: Without dead ends: 1125 [2024-09-12 15:39:54,185 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:39:54,185 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 850 mSDsCounter, 0 mSdLazyCounter, 1201 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 879 SdHoareTripleChecker+Invalid, 1217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:54,185 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 879 Invalid, 1217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1201 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:54,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2024-09-12 15:39:54,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 1121. [2024-09-12 15:39:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 977 states have (on average 1.1340839303991812) internal successors, (1108), 1067 states have internal predecessors, (1108), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-12 15:39:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 1264 transitions. [2024-09-12 15:39:54,710 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 1264 transitions. Word has length 56 [2024-09-12 15:39:54,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:54,710 INFO L474 AbstractCegarLoop]: Abstraction has 1121 states and 1264 transitions. [2024-09-12 15:39:54,710 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:54,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:54,710 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 1264 transitions. [2024-09-12 15:39:54,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:54,718 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:54,718 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:54,730 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2024-09-12 15:39:54,918 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2024-09-12 15:39:54,918 INFO L399 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:54,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:54,919 INFO L85 PathProgramCache]: Analyzing trace with hash 2053990524, now seen corresponding path program 97 times [2024-09-12 15:39:54,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:54,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248783491] [2024-09-12 15:39:54,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:54,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:54,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:55,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:55,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:55,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:55,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:55,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:39:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:55,296 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:55,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:55,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248783491] [2024-09-12 15:39:55,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248783491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:55,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855338239] [2024-09-12 15:39:55,296 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:39:55,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:55,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:55,297 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:55,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2024-09-12 15:39:55,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:55,386 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:39:55,387 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:55,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:55,830 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:39:55,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [855338239] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:55,830 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:55,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 46 [2024-09-12 15:39:55,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120913736] [2024-09-12 15:39:55,831 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:55,831 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-12 15:39:55,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:55,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-12 15:39:55,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1951, Unknown=0, NotChecked=0, Total=2070 [2024-09-12 15:39:55,831 INFO L87 Difference]: Start difference. First operand 1121 states and 1264 transitions. Second operand has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:56,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:56,714 INFO L93 Difference]: Finished difference Result 1137 states and 1284 transitions. [2024-09-12 15:39:56,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:39:56,715 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 56 [2024-09-12 15:39:56,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:56,725 INFO L225 Difference]: With dead ends: 1137 [2024-09-12 15:39:56,725 INFO L226 Difference]: Without dead ends: 1119 [2024-09-12 15:39:56,736 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=145, Invalid=2507, Unknown=0, NotChecked=0, Total=2652 [2024-09-12 15:39:56,736 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 28 mSDsluCounter, 1094 mSDsCounter, 0 mSdLazyCounter, 1119 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 1130 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1119 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:56,736 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 1130 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1119 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:56,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2024-09-12 15:39:57,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 1115. [2024-09-12 15:39:57,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1115 states, 971 states have (on average 1.1359423274974254) internal successors, (1103), 1061 states have internal predecessors, (1103), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (106), 48 states have call predecessors, (106), 48 states have call successors, (106) [2024-09-12 15:39:57,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1115 states to 1115 states and 1259 transitions. [2024-09-12 15:39:57,300 INFO L78 Accepts]: Start accepts. Automaton has 1115 states and 1259 transitions. Word has length 56 [2024-09-12 15:39:57,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:39:57,300 INFO L474 AbstractCegarLoop]: Abstraction has 1115 states and 1259 transitions. [2024-09-12 15:39:57,300 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 41 states have (on average 1.3414634146341464) internal successors, (55), 41 states have internal predecessors, (55), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:39:57,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:57,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1115 states and 1259 transitions. [2024-09-12 15:39:57,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-09-12 15:39:57,308 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:39:57,308 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:39:57,320 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2024-09-12 15:39:57,508 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2024-09-12 15:39:57,509 INFO L399 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:39:57,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:39:57,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1507543379, now seen corresponding path program 98 times [2024-09-12 15:39:57,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:39:57,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179365944] [2024-09-12 15:39:57,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:39:57,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:39:57,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:39:57,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:39:57,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:39:57,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:39:57,816 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 49 trivial. 0 not checked. [2024-09-12 15:39:57,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:39:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179365944] [2024-09-12 15:39:57,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179365944] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:39:57,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041912184] [2024-09-12 15:39:57,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:39:57,816 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:39:57,816 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:39:57,817 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:39:57,818 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2024-09-12 15:39:57,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:39:57,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:39:57,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-12 15:39:57,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:39:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 15:39:58,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:39:58,722 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-12 15:39:58,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1041912184] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:39:58,722 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:39:58,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 19, 19] total 50 [2024-09-12 15:39:58,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107529581] [2024-09-12 15:39:58,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:39:58,722 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:39:58,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:39:58,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:39:58,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=2272, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:39:58,723 INFO L87 Difference]: Start difference. First operand 1115 states and 1259 transitions. Second operand has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:39:59,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:39:59,866 INFO L93 Difference]: Finished difference Result 1127 states and 1270 transitions. [2024-09-12 15:39:59,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-12 15:39:59,867 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 56 [2024-09-12 15:39:59,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:39:59,873 INFO L225 Difference]: With dead ends: 1127 [2024-09-12 15:39:59,873 INFO L226 Difference]: Without dead ends: 1101 [2024-09-12 15:39:59,884 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 86 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2024-09-12 15:39:59,884 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 758 mSDsCounter, 0 mSdLazyCounter, 1067 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 787 SdHoareTripleChecker+Invalid, 1083 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:39:59,884 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 787 Invalid, 1083 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1067 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:39:59,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1101 states. [2024-09-12 15:40:00,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1101 to 1099. [2024-09-12 15:40:00,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 955 states have (on average 1.1361256544502618) internal successors, (1085), 1045 states have internal predecessors, (1085), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (96), 48 states have call predecessors, (96), 48 states have call successors, (96) [2024-09-12 15:40:00,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 1231 transitions. [2024-09-12 15:40:00,693 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 1231 transitions. Word has length 56 [2024-09-12 15:40:00,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:00,694 INFO L474 AbstractCegarLoop]: Abstraction has 1099 states and 1231 transitions. [2024-09-12 15:40:00,694 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.44) internal successors, (72), 50 states have internal predecessors, (72), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:00,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:00,694 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 1231 transitions. [2024-09-12 15:40:00,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:40:00,701 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:00,701 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:00,713 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2024-09-12 15:40:00,901 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2024-09-12 15:40:00,901 INFO L399 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:00,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:00,902 INFO L85 PathProgramCache]: Analyzing trace with hash 697142747, now seen corresponding path program 99 times [2024-09-12 15:40:00,902 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:00,902 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134373400] [2024-09-12 15:40:00,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:00,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:00,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:00,983 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:00,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:00,984 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:00,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:01,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:40:01,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:01,470 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:01,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:01,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134373400] [2024-09-12 15:40:01,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134373400] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:01,471 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1829168064] [2024-09-12 15:40:01,471 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:40:01,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:01,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:01,472 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:01,472 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2024-09-12 15:40:01,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-12 15:40:01,566 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:01,567 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:40:01,568 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:02,379 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:02,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:03,695 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:03,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1829168064] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:03,695 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:03,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-12 15:40:03,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756803676] [2024-09-12 15:40:03,695 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:03,695 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-12 15:40:03,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:03,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-12 15:40:03,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-12 15:40:03,697 INFO L87 Difference]: Start difference. First operand 1099 states and 1231 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:06,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:06,481 INFO L93 Difference]: Finished difference Result 1231 states and 1388 transitions. [2024-09-12 15:40:06,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:06,482 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-12 15:40:06,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:06,503 INFO L225 Difference]: With dead ends: 1231 [2024-09-12 15:40:06,503 INFO L226 Difference]: Without dead ends: 1218 [2024-09-12 15:40:06,515 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1631 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-12 15:40:06,516 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1241 mSDsCounter, 0 mSdLazyCounter, 2938 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1268 SdHoareTripleChecker+Invalid, 2961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 2938 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:06,516 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1268 Invalid, 2961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 2938 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:40:06,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-12 15:40:07,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1210. [2024-09-12 15:40:07,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1210 states, 1051 states have (on average 1.1351094196003806) internal successors, (1193), 1151 states have internal predecessors, (1193), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (111), 53 states have call predecessors, (111), 53 states have call successors, (111) [2024-09-12 15:40:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1210 states to 1210 states and 1359 transitions. [2024-09-12 15:40:07,165 INFO L78 Accepts]: Start accepts. Automaton has 1210 states and 1359 transitions. Word has length 57 [2024-09-12 15:40:07,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:07,165 INFO L474 AbstractCegarLoop]: Abstraction has 1210 states and 1359 transitions. [2024-09-12 15:40:07,165 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:07,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:07,165 INFO L276 IsEmpty]: Start isEmpty. Operand 1210 states and 1359 transitions. [2024-09-12 15:40:07,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:40:07,174 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:07,174 INFO L216 NwaCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:07,186 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2024-09-12 15:40:07,374 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2024-09-12 15:40:07,374 INFO L399 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:07,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:07,375 INFO L85 PathProgramCache]: Analyzing trace with hash -1635153294, now seen corresponding path program 100 times [2024-09-12 15:40:07,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:07,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095375192] [2024-09-12 15:40:07,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:07,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:07,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,631 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:07,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:07,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:07,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095375192] [2024-09-12 15:40:07,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2095375192] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:07,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772607868] [2024-09-12 15:40:07,942 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:40:07,942 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:07,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:07,943 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:07,944 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2024-09-12 15:40:08,034 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:40:08,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:08,035 INFO L262 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-12 15:40:08,036 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:08,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:10,082 INFO L134 CoverageAnalysis]: Checked inductivity of 173 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:10,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772607868] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:10,083 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:10,083 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 31, 31] total 84 [2024-09-12 15:40:10,083 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882746911] [2024-09-12 15:40:10,083 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:10,083 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2024-09-12 15:40:10,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:10,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2024-09-12 15:40:10,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=6689, Unknown=0, NotChecked=0, Total=6972 [2024-09-12 15:40:10,084 INFO L87 Difference]: Start difference. First operand 1210 states and 1359 transitions. Second operand has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:12,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:12,873 INFO L93 Difference]: Finished difference Result 1224 states and 1373 transitions. [2024-09-12 15:40:12,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-12 15:40:12,873 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 57 [2024-09-12 15:40:12,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:12,885 INFO L225 Difference]: With dead ends: 1224 [2024-09-12 15:40:12,885 INFO L226 Difference]: Without dead ends: 1213 [2024-09-12 15:40:12,899 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1646 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=542, Invalid=10800, Unknown=0, NotChecked=0, Total=11342 [2024-09-12 15:40:12,899 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1473 mSDsCounter, 0 mSdLazyCounter, 3001 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1505 SdHoareTripleChecker+Invalid, 3024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 3001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:12,899 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1505 Invalid, 3024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 3001 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:40:12,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1213 states. [2024-09-12 15:40:13,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1213 to 1211. [2024-09-12 15:40:13,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1211 states, 1052 states have (on average 1.1349809885931559) internal successors, (1194), 1152 states have internal predecessors, (1194), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-09-12 15:40:13,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1211 states to 1211 states and 1354 transitions. [2024-09-12 15:40:13,514 INFO L78 Accepts]: Start accepts. Automaton has 1211 states and 1354 transitions. Word has length 57 [2024-09-12 15:40:13,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:13,514 INFO L474 AbstractCegarLoop]: Abstraction has 1211 states and 1354 transitions. [2024-09-12 15:40:13,514 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3571428571428572) internal successors, (114), 84 states have internal predecessors, (114), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:13,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:13,514 INFO L276 IsEmpty]: Start isEmpty. Operand 1211 states and 1354 transitions. [2024-09-12 15:40:13,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:40:13,524 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:13,524 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:13,536 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Ended with exit code 0 [2024-09-12 15:40:13,724 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,101 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:13,724 INFO L399 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:13,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:13,725 INFO L85 PathProgramCache]: Analyzing trace with hash -201882063, now seen corresponding path program 101 times [2024-09-12 15:40:13,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:13,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221721744] [2024-09-12 15:40:13,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:13,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:13,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,766 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:13,850 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:13,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:13,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221721744] [2024-09-12 15:40:13,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221721744] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:13,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403847605] [2024-09-12 15:40:13,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:13,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:13,852 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:13,853 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2024-09-12 15:40:13,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:40:13,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:13,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:40:13,948 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:14,022 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:14,022 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:14,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403847605] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:14,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:14,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-12 15:40:14,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254304604] [2024-09-12 15:40:14,098 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:14,098 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:40:14,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:14,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:40:14,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:40:14,098 INFO L87 Difference]: Start difference. First operand 1211 states and 1354 transitions. Second operand has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:40:14,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:14,931 INFO L93 Difference]: Finished difference Result 1250 states and 1403 transitions. [2024-09-12 15:40:14,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:14,931 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 57 [2024-09-12 15:40:14,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:14,939 INFO L225 Difference]: With dead ends: 1250 [2024-09-12 15:40:14,939 INFO L226 Difference]: Without dead ends: 1218 [2024-09-12 15:40:14,952 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 756 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:40:14,952 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 91 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 89 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 100 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 89 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:14,952 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 198 Invalid, 100 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 89 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-12 15:40:14,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1218 states. [2024-09-12 15:40:15,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1218 to 1208. [2024-09-12 15:40:15,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1208 states, 1055 states have (on average 1.1308056872037915) internal successors, (1193), 1151 states have internal predecessors, (1193), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-12 15:40:15,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1208 states to 1208 states and 1345 transitions. [2024-09-12 15:40:15,619 INFO L78 Accepts]: Start accepts. Automaton has 1208 states and 1345 transitions. Word has length 57 [2024-09-12 15:40:15,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:15,619 INFO L474 AbstractCegarLoop]: Abstraction has 1208 states and 1345 transitions. [2024-09-12 15:40:15,619 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.875) internal successors, (45), 24 states have internal predecessors, (45), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:40:15,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:15,619 INFO L276 IsEmpty]: Start isEmpty. Operand 1208 states and 1345 transitions. [2024-09-12 15:40:15,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-12 15:40:15,628 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:15,628 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:15,640 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2024-09-12 15:40:15,828 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,102 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:15,828 INFO L399 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:15,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:15,829 INFO L85 PathProgramCache]: Analyzing trace with hash -561571686, now seen corresponding path program 102 times [2024-09-12 15:40:15,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:15,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173774421] [2024-09-12 15:40:15,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:15,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:15,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:15,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:15,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:15,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:15,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:15,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 29 [2024-09-12 15:40:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:15,953 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:15,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173774421] [2024-09-12 15:40:15,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173774421] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:15,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631678530] [2024-09-12 15:40:15,954 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:15,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:15,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:15,955 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:15,956 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2024-09-12 15:40:16,050 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:40:16,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:16,050 INFO L262 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-12 15:40:16,051 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:16,125 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:16,125 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 28 proven. 21 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:16,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631678530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:16,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 24 [2024-09-12 15:40:16,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349264319] [2024-09-12 15:40:16,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:16,201 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-12 15:40:16,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:16,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-12 15:40:16,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=199, Invalid=353, Unknown=0, NotChecked=0, Total=552 [2024-09-12 15:40:16,202 INFO L87 Difference]: Start difference. First operand 1208 states and 1345 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:17,000 INFO L93 Difference]: Finished difference Result 1834 states and 2016 transitions. [2024-09-12 15:40:17,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2024-09-12 15:40:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 57 [2024-09-12 15:40:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:17,038 INFO L225 Difference]: With dead ends: 1834 [2024-09-12 15:40:17,038 INFO L226 Difference]: Without dead ends: 1221 [2024-09-12 15:40:17,056 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 99 SyntacticMatches, 15 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 791 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=696, Invalid=1284, Unknown=0, NotChecked=0, Total=1980 [2024-09-12 15:40:17,056 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 78 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:17,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 230 Invalid, 159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:40:17,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-12 15:40:17,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-12 15:40:17,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (99), 51 states have call predecessors, (99), 51 states have call successors, (99) [2024-09-12 15:40:17,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1358 transitions. [2024-09-12 15:40:17,730 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1358 transitions. Word has length 57 [2024-09-12 15:40:17,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:17,730 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1358 transitions. [2024-09-12 15:40:17,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 24 states have internal predecessors, (54), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:17,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:17,731 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1358 transitions. [2024-09-12 15:40:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:17,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:17,740 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:17,752 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2024-09-12 15:40:17,940 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2024-09-12 15:40:17,940 INFO L399 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:17,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:17,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1902474405, now seen corresponding path program 103 times [2024-09-12 15:40:17,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:17,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769589775] [2024-09-12 15:40:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:17,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:17,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:18,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:18,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:18,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:18,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:18,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:18,533 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:40:18,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769589775] [2024-09-12 15:40:18,533 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769589775] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:18,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385883149] [2024-09-12 15:40:18,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:18,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:18,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:18,534 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:18,535 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2024-09-12 15:40:18,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:18,630 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-12 15:40:18,630 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:18,799 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:40:18,800 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:18,936 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:40:18,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385883149] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:18,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:18,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 48 [2024-09-12 15:40:18,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653710932] [2024-09-12 15:40:18,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:18,936 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:18,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:18,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:18,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2153, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:18,937 INFO L87 Difference]: Start difference. First operand 1221 states and 1358 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:20,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:20,584 INFO L93 Difference]: Finished difference Result 1357 states and 1511 transitions. [2024-09-12 15:40:20,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-12 15:40:20,585 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:20,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:20,597 INFO L225 Difference]: With dead ends: 1357 [2024-09-12 15:40:20,597 INFO L226 Difference]: Without dead ends: 1351 [2024-09-12 15:40:20,613 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=129, Invalid=2733, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:20,613 INFO L434 NwaCegarLoop]: 123 mSDtfsCounter, 137 mSDsluCounter, 5054 mSDsCounter, 0 mSdLazyCounter, 3831 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 5177 SdHoareTripleChecker+Invalid, 3832 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3831 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:20,613 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 5177 Invalid, 3832 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3831 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:40:20,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1351 states. [2024-09-12 15:40:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1351 to 1235. [2024-09-12 15:40:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1235 states, 1079 states have (on average 1.1297497683039852) internal successors, (1219), 1177 states have internal predecessors, (1219), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (102), 52 states have call predecessors, (102), 52 states have call successors, (102) [2024-09-12 15:40:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1235 states to 1235 states and 1375 transitions. [2024-09-12 15:40:21,243 INFO L78 Accepts]: Start accepts. Automaton has 1235 states and 1375 transitions. Word has length 58 [2024-09-12 15:40:21,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:21,243 INFO L474 AbstractCegarLoop]: Abstraction has 1235 states and 1375 transitions. [2024-09-12 15:40:21,243 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:21,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:21,244 INFO L276 IsEmpty]: Start isEmpty. Operand 1235 states and 1375 transitions. [2024-09-12 15:40:21,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:21,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:21,252 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:21,265 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2024-09-12 15:40:21,453 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,104 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:21,453 INFO L399 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:21,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:21,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1757191105, now seen corresponding path program 104 times [2024-09-12 15:40:21,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:21,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115180473] [2024-09-12 15:40:21,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:21,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:21,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:21,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:21,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:21,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:21,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:21,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:22,017 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:40:22,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:22,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115180473] [2024-09-12 15:40:22,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115180473] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:22,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728627727] [2024-09-12 15:40:22,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:40:22,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:22,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:22,018 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:22,019 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2024-09-12 15:40:22,114 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:40:22,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:22,115 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 15:40:22,116 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:22,324 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:40:22,325 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:22,520 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 138 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:40:22,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1728627727] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:22,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:22,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 48 [2024-09-12 15:40:22,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145853828] [2024-09-12 15:40:22,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:22,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:22,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:22,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:22,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2149, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:22,521 INFO L87 Difference]: Start difference. First operand 1235 states and 1375 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:24,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:24,023 INFO L93 Difference]: Finished difference Result 1241 states and 1380 transitions. [2024-09-12 15:40:24,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 15:40:24,024 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:24,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:24,031 INFO L225 Difference]: With dead ends: 1241 [2024-09-12 15:40:24,031 INFO L226 Difference]: Without dead ends: 1221 [2024-09-12 15:40:24,043 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2729, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:24,043 INFO L434 NwaCegarLoop]: 111 mSDtfsCounter, 116 mSDsluCounter, 4707 mSDsCounter, 0 mSdLazyCounter, 3655 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 4818 SdHoareTripleChecker+Invalid, 3656 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:24,043 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 4818 Invalid, 3656 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:40:24,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1221 states. [2024-09-12 15:40:24,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1221 to 1221. [2024-09-12 15:40:24,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1068 states have (on average 1.1292134831460674) internal successors, (1206), 1164 states have internal predecessors, (1206), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (100), 51 states have call predecessors, (100), 51 states have call successors, (100) [2024-09-12 15:40:24,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 1359 transitions. [2024-09-12 15:40:24,721 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 1359 transitions. Word has length 58 [2024-09-12 15:40:24,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:24,722 INFO L474 AbstractCegarLoop]: Abstraction has 1221 states and 1359 transitions. [2024-09-12 15:40:24,722 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:24,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:24,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 1359 transitions. [2024-09-12 15:40:24,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:24,730 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:24,730 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:24,743 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2024-09-12 15:40:24,931 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2024-09-12 15:40:24,931 INFO L399 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:24,931 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:24,931 INFO L85 PathProgramCache]: Analyzing trace with hash -711669595, now seen corresponding path program 105 times [2024-09-12 15:40:24,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:24,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645491686] [2024-09-12 15:40:24,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:24,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:24,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:25,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:25,440 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:40:25,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:25,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645491686] [2024-09-12 15:40:25,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645491686] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:25,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1116464607] [2024-09-12 15:40:25,441 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:40:25,441 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:25,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:25,442 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:25,442 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2024-09-12 15:40:25,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2024-09-12 15:40:25,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:25,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 15:40:25,541 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:25,791 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:40:25,792 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:25,921 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:40:25,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1116464607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:25,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:25,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 48 [2024-09-12 15:40:25,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1554414509] [2024-09-12 15:40:25,921 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:25,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:25,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:25,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:25,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2145, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:25,922 INFO L87 Difference]: Start difference. First operand 1221 states and 1359 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:27,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:27,286 INFO L93 Difference]: Finished difference Result 1227 states and 1364 transitions. [2024-09-12 15:40:27,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-12 15:40:27,287 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:27,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:27,293 INFO L225 Difference]: With dead ends: 1227 [2024-09-12 15:40:27,293 INFO L226 Difference]: Without dead ends: 1205 [2024-09-12 15:40:27,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=2725, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:27,310 INFO L434 NwaCegarLoop]: 95 mSDtfsCounter, 97 mSDsluCounter, 3567 mSDsCounter, 0 mSdLazyCounter, 2842 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 3662 SdHoareTripleChecker+Invalid, 2843 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:27,310 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [98 Valid, 3662 Invalid, 2843 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2842 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:40:27,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1205 states. [2024-09-12 15:40:27,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1205 to 1205. [2024-09-12 15:40:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1205 states, 1055 states have (on average 1.128909952606635) internal successors, (1191), 1149 states have internal predecessors, (1191), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (98), 50 states have call predecessors, (98), 50 states have call successors, (98) [2024-09-12 15:40:27,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1205 states to 1205 states and 1341 transitions. [2024-09-12 15:40:27,926 INFO L78 Accepts]: Start accepts. Automaton has 1205 states and 1341 transitions. Word has length 58 [2024-09-12 15:40:27,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:27,926 INFO L474 AbstractCegarLoop]: Abstraction has 1205 states and 1341 transitions. [2024-09-12 15:40:27,926 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:27,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:27,926 INFO L276 IsEmpty]: Start isEmpty. Operand 1205 states and 1341 transitions. [2024-09-12 15:40:27,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:27,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:27,935 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:27,947 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2024-09-12 15:40:28,135 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2024-09-12 15:40:28,135 INFO L399 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:28,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:28,135 INFO L85 PathProgramCache]: Analyzing trace with hash -148391999, now seen corresponding path program 106 times [2024-09-12 15:40:28,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:28,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392047685] [2024-09-12 15:40:28,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:28,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:28,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,244 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,245 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:28,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:28,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:28,610 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:40:28,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392047685] [2024-09-12 15:40:28,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392047685] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:28,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900285815] [2024-09-12 15:40:28,611 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:40:28,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:28,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:28,612 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:28,612 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2024-09-12 15:40:28,708 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:40:28,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:28,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 15:40:28,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:29,007 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:40:29,008 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:40:29,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900285815] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:29,132 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:29,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 48 [2024-09-12 15:40:29,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148413959] [2024-09-12 15:40:29,132 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:29,132 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2141, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:29,133 INFO L87 Difference]: Start difference. First operand 1205 states and 1341 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:30,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:30,342 INFO L93 Difference]: Finished difference Result 1211 states and 1346 transitions. [2024-09-12 15:40:30,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:40:30,342 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:30,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:30,348 INFO L225 Difference]: With dead ends: 1211 [2024-09-12 15:40:30,348 INFO L226 Difference]: Without dead ends: 1187 [2024-09-12 15:40:30,376 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2721, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:30,376 INFO L434 NwaCegarLoop]: 79 mSDtfsCounter, 77 mSDsluCounter, 2579 mSDsCounter, 0 mSdLazyCounter, 2124 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 2658 SdHoareTripleChecker+Invalid, 2125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:30,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 2658 Invalid, 2125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2124 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-12 15:40:30,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1187 states. [2024-09-12 15:40:30,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1187 to 1187. [2024-09-12 15:40:30,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1187 states, 1040 states have (on average 1.1288461538461538) internal successors, (1174), 1132 states have internal predecessors, (1174), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (96), 49 states have call predecessors, (96), 49 states have call successors, (96) [2024-09-12 15:40:30,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1187 states to 1187 states and 1321 transitions. [2024-09-12 15:40:30,985 INFO L78 Accepts]: Start accepts. Automaton has 1187 states and 1321 transitions. Word has length 58 [2024-09-12 15:40:30,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:30,985 INFO L474 AbstractCegarLoop]: Abstraction has 1187 states and 1321 transitions. [2024-09-12 15:40:30,985 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:30,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:30,985 INFO L276 IsEmpty]: Start isEmpty. Operand 1187 states and 1321 transitions. [2024-09-12 15:40:30,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:30,993 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:30,993 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:31,005 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:31,193 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,107 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:31,193 INFO L399 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:31,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:31,193 INFO L85 PathProgramCache]: Analyzing trace with hash 1511996581, now seen corresponding path program 107 times [2024-09-12 15:40:31,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:31,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143384886] [2024-09-12 15:40:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:31,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:31,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:31,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,355 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:31,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,475 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:31,686 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:40:31,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143384886] [2024-09-12 15:40:31,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143384886] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:31,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214879058] [2024-09-12 15:40:31,686 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:31,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:31,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:31,687 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:31,688 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2024-09-12 15:40:31,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:40:31,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:31,784 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 15:40:31,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:32,109 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:40:32,109 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:40:32,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214879058] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:32,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:32,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 48 [2024-09-12 15:40:32,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015038923] [2024-09-12 15:40:32,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:32,233 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:32,233 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:32,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:32,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2137, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:32,233 INFO L87 Difference]: Start difference. First operand 1187 states and 1321 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:33,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:33,344 INFO L93 Difference]: Finished difference Result 1193 states and 1326 transitions. [2024-09-12 15:40:33,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:40:33,345 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:33,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:33,351 INFO L225 Difference]: With dead ends: 1193 [2024-09-12 15:40:33,351 INFO L226 Difference]: Without dead ends: 1167 [2024-09-12 15:40:33,362 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=2717, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:33,362 INFO L434 NwaCegarLoop]: 63 mSDtfsCounter, 57 mSDsluCounter, 2216 mSDsCounter, 0 mSdLazyCounter, 1923 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 2279 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:33,362 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 2279 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1923 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:40:33,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1167 states. [2024-09-12 15:40:34,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1167 to 1167. [2024-09-12 15:40:34,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1167 states, 1023 states have (on average 1.1290322580645162) internal successors, (1155), 1113 states have internal predecessors, (1155), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (94), 48 states have call predecessors, (94), 48 states have call successors, (94) [2024-09-12 15:40:34,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1167 states to 1167 states and 1299 transitions. [2024-09-12 15:40:34,016 INFO L78 Accepts]: Start accepts. Automaton has 1167 states and 1299 transitions. Word has length 58 [2024-09-12 15:40:34,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:34,017 INFO L474 AbstractCegarLoop]: Abstraction has 1167 states and 1299 transitions. [2024-09-12 15:40:34,017 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:34,017 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:34,017 INFO L276 IsEmpty]: Start isEmpty. Operand 1167 states and 1299 transitions. [2024-09-12 15:40:34,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:34,024 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:34,024 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:34,036 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2024-09-12 15:40:34,225 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,108 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:34,225 INFO L399 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:34,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:34,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1143491647, now seen corresponding path program 108 times [2024-09-12 15:40:34,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:34,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383662797] [2024-09-12 15:40:34,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:34,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,333 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:34,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:34,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:34,638 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:40:34,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383662797] [2024-09-12 15:40:34,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383662797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:34,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84452419] [2024-09-12 15:40:34,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:40:34,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:34,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:34,640 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:34,641 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2024-09-12 15:40:34,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-12 15:40:34,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:34,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:40:34,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:35,094 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:40:35,094 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:35,208 INFO L134 CoverageAnalysis]: Checked inductivity of 96 backedges. 0 proven. 54 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:40:35,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84452419] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:35,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:35,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 48 [2024-09-12 15:40:35,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076763862] [2024-09-12 15:40:35,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:35,208 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:35,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:35,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:35,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2133, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:35,209 INFO L87 Difference]: Start difference. First operand 1167 states and 1299 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:36,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:36,226 INFO L93 Difference]: Finished difference Result 1173 states and 1304 transitions. [2024-09-12 15:40:36,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:40:36,227 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:36,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:36,232 INFO L225 Difference]: With dead ends: 1173 [2024-09-12 15:40:36,232 INFO L226 Difference]: Without dead ends: 1145 [2024-09-12 15:40:36,243 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=2713, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:36,243 INFO L434 NwaCegarLoop]: 47 mSDtfsCounter, 36 mSDsluCounter, 1444 mSDsCounter, 0 mSdLazyCounter, 1358 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 1491 SdHoareTripleChecker+Invalid, 1359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:36,243 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 1491 Invalid, 1359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1358 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:36,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1145 states. [2024-09-12 15:40:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1145 to 1145. [2024-09-12 15:40:36,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1004 states have (on average 1.1294820717131475) internal successors, (1134), 1092 states have internal predecessors, (1134), 49 states have call successors, (49), 5 states have call predecessors, (49), 91 states have return successors, (92), 47 states have call predecessors, (92), 47 states have call successors, (92) [2024-09-12 15:40:36,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1275 transitions. [2024-09-12 15:40:36,831 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1275 transitions. Word has length 58 [2024-09-12 15:40:36,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:36,831 INFO L474 AbstractCegarLoop]: Abstraction has 1145 states and 1275 transitions. [2024-09-12 15:40:36,831 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:36,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:36,832 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1275 transitions. [2024-09-12 15:40:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-09-12 15:40:36,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:36,839 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:36,850 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:37,039 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2024-09-12 15:40:37,039 INFO L399 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:37,039 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:37,039 INFO L85 PathProgramCache]: Analyzing trace with hash -834350939, now seen corresponding path program 109 times [2024-09-12 15:40:37,039 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:37,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959115896] [2024-09-12 15:40:37,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:37,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:37,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:37,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:37,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:37,138 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:37,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:37,239 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:37,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:37,409 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:40:37,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:37,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959115896] [2024-09-12 15:40:37,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959115896] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:37,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612876241] [2024-09-12 15:40:37,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:40:37,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:37,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:37,410 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:37,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2024-09-12 15:40:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:37,505 INFO L262 TraceCheckSpWp]: Trace formula consists of 277 conjuncts, 55 conjuncts are in the unsatisfiable core [2024-09-12 15:40:37,506 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:37,883 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:40:37,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:38,005 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:40:38,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1612876241] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:38,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:38,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 48 [2024-09-12 15:40:38,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202989795] [2024-09-12 15:40:38,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:38,005 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-12 15:40:38,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:38,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-12 15:40:38,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2129, Unknown=0, NotChecked=0, Total=2256 [2024-09-12 15:40:38,006 INFO L87 Difference]: Start difference. First operand 1145 states and 1275 transitions. Second operand has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:38,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:38,966 INFO L93 Difference]: Finished difference Result 1161 states and 1294 transitions. [2024-09-12 15:40:38,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-12 15:40:38,966 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-09-12 15:40:38,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:38,977 INFO L225 Difference]: With dead ends: 1161 [2024-09-12 15:40:38,977 INFO L226 Difference]: Without dead ends: 1155 [2024-09-12 15:40:38,987 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=2709, Unknown=0, NotChecked=0, Total=2862 [2024-09-12 15:40:38,987 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 17 mSDsluCounter, 943 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 971 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:38,987 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 971 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:40:38,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1155 states. [2024-09-12 15:40:39,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1155 to 1153. [2024-09-12 15:40:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1153 states, 1009 states have (on average 1.1308225966303271) internal successors, (1141), 1099 states have internal predecessors, (1141), 50 states have call successors, (50), 5 states have call predecessors, (50), 93 states have return successors, (95), 48 states have call predecessors, (95), 48 states have call successors, (95) [2024-09-12 15:40:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1153 states to 1153 states and 1286 transitions. [2024-09-12 15:40:39,579 INFO L78 Accepts]: Start accepts. Automaton has 1153 states and 1286 transitions. Word has length 58 [2024-09-12 15:40:39,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:39,579 INFO L474 AbstractCegarLoop]: Abstraction has 1153 states and 1286 transitions. [2024-09-12 15:40:39,579 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 43 states have (on average 1.3255813953488371) internal successors, (57), 43 states have internal predecessors, (57), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:39,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:39,579 INFO L276 IsEmpty]: Start isEmpty. Operand 1153 states and 1286 transitions. [2024-09-12 15:40:39,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:40:39,586 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:39,586 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:39,598 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2024-09-12 15:40:39,787 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2024-09-12 15:40:39,787 INFO L399 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:39,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:39,787 INFO L85 PathProgramCache]: Analyzing trace with hash -100216622, now seen corresponding path program 110 times [2024-09-12 15:40:39,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:39,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422315936] [2024-09-12 15:40:39,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:39,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:39,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:39,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:39,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:39,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:39,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:40,047 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:40,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:40,386 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:40,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422315936] [2024-09-12 15:40:40,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422315936] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:40,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834945210] [2024-09-12 15:40:40,386 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:40:40,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:40,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:40,388 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:40,388 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2024-09-12 15:40:40,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:40:40,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:40,484 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:40:40,485 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:41,428 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:41,428 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:42,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834945210] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:42,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:42,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 90 [2024-09-12 15:40:42,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888678091] [2024-09-12 15:40:42,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:42,892 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-09-12 15:40:42,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:42,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-09-12 15:40:42,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=7706, Unknown=0, NotChecked=0, Total=8010 [2024-09-12 15:40:42,893 INFO L87 Difference]: Start difference. First operand 1153 states and 1286 transitions. Second operand has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:46,122 INFO L93 Difference]: Finished difference Result 1287 states and 1445 transitions. [2024-09-12 15:40:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-12 15:40:46,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:46,148 INFO L225 Difference]: With dead ends: 1287 [2024-09-12 15:40:46,149 INFO L226 Difference]: Without dead ends: 1274 [2024-09-12 15:40:46,162 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1896 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=598, Invalid=12512, Unknown=0, NotChecked=0, Total=13110 [2024-09-12 15:40:46,162 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 2 mSDsluCounter, 1339 mSDsCounter, 0 mSdLazyCounter, 3351 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1366 SdHoareTripleChecker+Invalid, 3376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:46,162 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1366 Invalid, 3376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3351 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 15:40:46,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2024-09-12 15:40:46,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 1266. [2024-09-12 15:40:46,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1107 states have (on average 1.1300813008130082) internal successors, (1251), 1207 states have internal predecessors, (1251), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (110), 53 states have call predecessors, (110), 53 states have call successors, (110) [2024-09-12 15:40:46,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 1416 transitions. [2024-09-12 15:40:46,835 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 1416 transitions. Word has length 59 [2024-09-12 15:40:46,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:46,835 INFO L474 AbstractCegarLoop]: Abstraction has 1266 states and 1416 transitions. [2024-09-12 15:40:46,835 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:46,835 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:46,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 1416 transitions. [2024-09-12 15:40:46,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:40:46,844 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:46,844 INFO L216 NwaCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:46,855 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2024-09-12 15:40:47,044 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,111 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:47,044 INFO L399 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:47,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:47,045 INFO L85 PathProgramCache]: Analyzing trace with hash 613050139, now seen corresponding path program 111 times [2024-09-12 15:40:47,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:47,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069515983] [2024-09-12 15:40:47,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:47,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:47,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:47,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:47,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:47,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:47,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:47,328 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:40:47,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:47,649 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:47,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069515983] [2024-09-12 15:40:47,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069515983] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:47,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60930235] [2024-09-12 15:40:47,649 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:40:47,649 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:47,649 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:47,650 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:47,651 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2024-09-12 15:40:47,753 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-12 15:40:47,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:47,754 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-12 15:40:47,755 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:48,691 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:48,691 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:40:50,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60930235] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:50,180 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:50,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 33, 33] total 90 [2024-09-12 15:40:50,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278191229] [2024-09-12 15:40:50,180 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:50,180 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2024-09-12 15:40:50,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:50,181 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2024-09-12 15:40:50,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=304, Invalid=7706, Unknown=0, NotChecked=0, Total=8010 [2024-09-12 15:40:50,182 INFO L87 Difference]: Start difference. First operand 1266 states and 1416 transitions. Second operand has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:53,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:53,355 INFO L93 Difference]: Finished difference Result 1280 states and 1430 transitions. [2024-09-12 15:40:53,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-12 15:40:53,355 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 59 [2024-09-12 15:40:53,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:53,362 INFO L225 Difference]: With dead ends: 1280 [2024-09-12 15:40:53,362 INFO L226 Difference]: Without dead ends: 1269 [2024-09-12 15:40:53,375 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 64 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=598, Invalid=12512, Unknown=0, NotChecked=0, Total=13110 [2024-09-12 15:40:53,375 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 2 mSDsluCounter, 1470 mSDsCounter, 0 mSdLazyCounter, 3239 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 1502 SdHoareTripleChecker+Invalid, 3264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 3239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:53,376 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 1502 Invalid, 3264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 3239 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 15:40:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2024-09-12 15:40:54,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1267. [2024-09-12 15:40:54,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1267 states, 1108 states have (on average 1.1299638989169676) internal successors, (1252), 1208 states have internal predecessors, (1252), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-12 15:40:54,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1267 states to 1267 states and 1411 transitions. [2024-09-12 15:40:54,064 INFO L78 Accepts]: Start accepts. Automaton has 1267 states and 1411 transitions. Word has length 59 [2024-09-12 15:40:54,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:54,064 INFO L474 AbstractCegarLoop]: Abstraction has 1267 states and 1411 transitions. [2024-09-12 15:40:54,064 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.3333333333333333) internal successors, (120), 90 states have internal predecessors, (120), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:40:54,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:54,064 INFO L276 IsEmpty]: Start isEmpty. Operand 1267 states and 1411 transitions. [2024-09-12 15:40:54,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:40:54,073 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:54,073 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:54,085 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:54,274 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,112 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:54,274 INFO L399 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:54,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:54,274 INFO L85 PathProgramCache]: Analyzing trace with hash -700573190, now seen corresponding path program 112 times [2024-09-12 15:40:54,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:54,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921303290] [2024-09-12 15:40:54,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:54,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:54,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:54,317 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:54,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:54,318 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:54,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:54,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:40:54,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:54,411 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:54,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921303290] [2024-09-12 15:40:54,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [921303290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:54,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026339168] [2024-09-12 15:40:54,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:40:54,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:54,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:54,413 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:54,413 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2024-09-12 15:40:54,511 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:40:54,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:54,512 INFO L262 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:40:54,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:54,608 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:54,608 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:54,685 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:54,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026339168] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:54,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:54,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2024-09-12 15:40:54,686 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001033881] [2024-09-12 15:40:54,686 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:54,686 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:40:54,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:54,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:40:54,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:40:54,686 INFO L87 Difference]: Start difference. First operand 1267 states and 1411 transitions. Second operand has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:55,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:55,748 INFO L93 Difference]: Finished difference Result 2061 states and 2283 transitions. [2024-09-12 15:40:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 15:40:55,748 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 59 [2024-09-12 15:40:55,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:55,797 INFO L225 Difference]: With dead ends: 2061 [2024-09-12 15:40:55,797 INFO L226 Difference]: Without dead ends: 1409 [2024-09-12 15:40:55,814 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=2002, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:40:55,814 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 38 mSDsluCounter, 263 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 296 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:55,815 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 303 Invalid, 296 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:40:55,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1409 states. [2024-09-12 15:40:56,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1409 to 1409. [2024-09-12 15:40:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1409 states, 1250 states have (on average 1.1272) internal successors, (1409), 1350 states have internal predecessors, (1409), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-12 15:40:56,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1409 states to 1409 states and 1568 transitions. [2024-09-12 15:40:56,649 INFO L78 Accepts]: Start accepts. Automaton has 1409 states and 1568 transitions. Word has length 59 [2024-09-12 15:40:56,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:56,650 INFO L474 AbstractCegarLoop]: Abstraction has 1409 states and 1568 transitions. [2024-09-12 15:40:56,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 26 states have internal predecessors, (57), 2 states have call successors, (6), 2 states have call predecessors, (6), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:40:56,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:56,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1409 states and 1568 transitions. [2024-09-12 15:40:56,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2024-09-12 15:40:56,659 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:56,659 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:56,671 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Forceful destruction successful, exit code 0 [2024-09-12 15:40:56,859 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable121 [2024-09-12 15:40:56,860 INFO L399 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:56,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:56,860 INFO L85 PathProgramCache]: Analyzing trace with hash 1033950385, now seen corresponding path program 113 times [2024-09-12 15:40:56,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:56,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128794538] [2024-09-12 15:40:56,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:56,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:56,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:56,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,905 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:56,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,908 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:40:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:56,999 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:56,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:40:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128794538] [2024-09-12 15:40:56,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128794538] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:40:56,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088840124] [2024-09-12 15:40:56,999 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:40:57,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:57,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:40:57,001 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:40:57,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2024-09-12 15:40:57,102 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-12 15:40:57,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:40:57,102 INFO L262 TraceCheckSpWp]: Trace formula consists of 282 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-12 15:40:57,103 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:40:57,206 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:57,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:40:57,286 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 36 proven. 28 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2024-09-12 15:40:57,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2088840124] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:40:57,287 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:40:57,287 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 26 [2024-09-12 15:40:57,287 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753619396] [2024-09-12 15:40:57,287 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:40:57,287 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-12 15:40:57,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:40:57,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-12 15:40:57,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2024-09-12 15:40:57,288 INFO L87 Difference]: Start difference. First operand 1409 states and 1568 transitions. Second operand has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:40:58,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:40:58,434 INFO L93 Difference]: Finished difference Result 1599 states and 1801 transitions. [2024-09-12 15:40:58,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 15:40:58,434 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 59 [2024-09-12 15:40:58,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:40:58,443 INFO L225 Difference]: With dead ends: 1599 [2024-09-12 15:40:58,444 INFO L226 Difference]: Without dead ends: 1551 [2024-09-12 15:40:58,461 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 102 SyntacticMatches, 15 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=754, Invalid=2002, Unknown=0, NotChecked=0, Total=2756 [2024-09-12 15:40:58,462 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 42 mSDsluCounter, 203 mSDsCounter, 0 mSdLazyCounter, 256 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 243 SdHoareTripleChecker+Invalid, 262 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 256 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-12 15:40:58,462 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 243 Invalid, 262 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 256 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-12 15:40:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-09-12 15:40:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2024-09-12 15:40:59,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1392 states have (on average 1.125) internal successors, (1566), 1492 states have internal predecessors, (1566), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (104), 53 states have call predecessors, (104), 53 states have call successors, (104) [2024-09-12 15:40:59,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1725 transitions. [2024-09-12 15:40:59,301 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1725 transitions. Word has length 59 [2024-09-12 15:40:59,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:40:59,301 INFO L474 AbstractCegarLoop]: Abstraction has 1551 states and 1725 transitions. [2024-09-12 15:40:59,302 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 26 states have internal predecessors, (48), 2 states have call successors, (5), 2 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-09-12 15:40:59,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:59,302 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1725 transitions. [2024-09-12 15:40:59,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:40:59,313 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:40:59,313 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:40:59,326 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2024-09-12 15:40:59,513 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122,114 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:40:59,514 INFO L399 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:40:59,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:40:59,514 INFO L85 PathProgramCache]: Analyzing trace with hash -1417663204, now seen corresponding path program 114 times [2024-09-12 15:40:59,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:40:59,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704086589] [2024-09-12 15:40:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:40:59,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:40:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:59,702 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:40:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:59,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:40:59,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:40:59,877 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:40:59,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:00,208 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:41:00,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:00,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704086589] [2024-09-12 15:41:00,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704086589] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:00,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852478534] [2024-09-12 15:41:00,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:41:00,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:00,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:00,209 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:00,210 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2024-09-12 15:41:00,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-12 15:41:00,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:00,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 83 conjuncts are in the unsatisfiable core [2024-09-12 15:41:00,315 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:00,490 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:41:00,490 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:00,639 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 212 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-12 15:41:00,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852478534] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:00,639 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:00,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 50 [2024-09-12 15:41:00,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545852244] [2024-09-12 15:41:00,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:00,639 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:00,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:00,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:00,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2343, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:00,640 INFO L87 Difference]: Start difference. First operand 1551 states and 1725 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:02,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:02,645 INFO L93 Difference]: Finished difference Result 1707 states and 1900 transitions. [2024-09-12 15:41:02,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-12 15:41:02,646 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:02,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:02,662 INFO L225 Difference]: With dead ends: 1707 [2024-09-12 15:41:02,662 INFO L226 Difference]: Without dead ends: 1701 [2024-09-12 15:41:02,680 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 117 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=133, Invalid=2947, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:02,681 INFO L434 NwaCegarLoop]: 133 mSDtfsCounter, 147 mSDsluCounter, 5729 mSDsCounter, 0 mSdLazyCounter, 4293 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 5862 SdHoareTripleChecker+Invalid, 4294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4293 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:02,681 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [157 Valid, 5862 Invalid, 4294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4293 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-12 15:41:02,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2024-09-12 15:41:03,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1565. [2024-09-12 15:41:03,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1565 states, 1403 states have (on average 1.1254454739843194) internal successors, (1579), 1505 states have internal predecessors, (1579), 56 states have call successors, (56), 5 states have call predecessors, (56), 105 states have return successors, (107), 54 states have call predecessors, (107), 54 states have call successors, (107) [2024-09-12 15:41:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1565 states to 1565 states and 1742 transitions. [2024-09-12 15:41:03,533 INFO L78 Accepts]: Start accepts. Automaton has 1565 states and 1742 transitions. Word has length 60 [2024-09-12 15:41:03,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:03,534 INFO L474 AbstractCegarLoop]: Abstraction has 1565 states and 1742 transitions. [2024-09-12 15:41:03,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:03,534 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:03,534 INFO L276 IsEmpty]: Start isEmpty. Operand 1565 states and 1742 transitions. [2024-09-12 15:41:03,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:03,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:03,546 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:03,558 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2024-09-12 15:41:03,746 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2024-09-12 15:41:03,746 INFO L399 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:03,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:03,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1854930716, now seen corresponding path program 115 times [2024-09-12 15:41:03,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:03,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160942483] [2024-09-12 15:41:03,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:03,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:03,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:03,868 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:03,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:03,869 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,409 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:41:04,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160942483] [2024-09-12 15:41:04,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160942483] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:04,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943996283] [2024-09-12 15:41:04,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:41:04,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:04,410 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:04,410 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:04,411 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2024-09-12 15:41:04,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:04,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 79 conjuncts are in the unsatisfiable core [2024-09-12 15:41:04,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:04,749 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:41:04,749 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:04,894 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-12 15:41:04,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943996283] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:04,894 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:04,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 50 [2024-09-12 15:41:04,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058813823] [2024-09-12 15:41:04,894 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:04,894 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:04,894 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:04,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:04,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=2339, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:04,895 INFO L87 Difference]: Start difference. First operand 1565 states and 1742 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:06,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:06,657 INFO L93 Difference]: Finished difference Result 1571 states and 1747 transitions. [2024-09-12 15:41:06,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-12 15:41:06,657 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:06,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:06,667 INFO L225 Difference]: With dead ends: 1571 [2024-09-12 15:41:06,667 INFO L226 Difference]: Without dead ends: 1551 [2024-09-12 15:41:06,685 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 115 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=137, Invalid=2943, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:06,685 INFO L434 NwaCegarLoop]: 117 mSDtfsCounter, 126 mSDsluCounter, 4888 mSDsCounter, 0 mSdLazyCounter, 3767 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 5005 SdHoareTripleChecker+Invalid, 3768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:06,685 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 5005 Invalid, 3768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3767 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-09-12 15:41:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1551 states. [2024-09-12 15:41:07,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1551 to 1551. [2024-09-12 15:41:07,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1551 states, 1392 states have (on average 1.125) internal successors, (1566), 1492 states have internal predecessors, (1566), 55 states have call successors, (55), 5 states have call predecessors, (55), 103 states have return successors, (105), 53 states have call predecessors, (105), 53 states have call successors, (105) [2024-09-12 15:41:07,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1551 states to 1551 states and 1726 transitions. [2024-09-12 15:41:07,607 INFO L78 Accepts]: Start accepts. Automaton has 1551 states and 1726 transitions. Word has length 60 [2024-09-12 15:41:07,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:07,607 INFO L474 AbstractCegarLoop]: Abstraction has 1551 states and 1726 transitions. [2024-09-12 15:41:07,607 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:07,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:07,607 INFO L276 IsEmpty]: Start isEmpty. Operand 1551 states and 1726 transitions. [2024-09-12 15:41:07,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:07,619 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:07,619 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:07,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2024-09-12 15:41:07,819 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2024-09-12 15:41:07,820 INFO L399 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:07,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:07,820 INFO L85 PathProgramCache]: Analyzing trace with hash -354179812, now seen corresponding path program 116 times [2024-09-12 15:41:07,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:07,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441851139] [2024-09-12 15:41:07,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:07,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:07,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:07,939 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:07,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:07,940 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:07,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:08,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:41:08,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441851139] [2024-09-12 15:41:08,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441851139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:08,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194393478] [2024-09-12 15:41:08,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:41:08,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:08,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:08,373 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:08,374 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2024-09-12 15:41:08,475 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:41:08,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:08,476 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 75 conjuncts are in the unsatisfiable core [2024-09-12 15:41:08,477 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:08,735 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:41:08,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:08,871 INFO L134 CoverageAnalysis]: Checked inductivity of 134 backedges. 0 proven. 122 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-12 15:41:08,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1194393478] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:08,871 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:08,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 50 [2024-09-12 15:41:08,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356492758] [2024-09-12 15:41:08,871 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:08,871 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:08,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:08,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:08,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=2335, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:08,872 INFO L87 Difference]: Start difference. First operand 1551 states and 1726 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:10,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:10,515 INFO L93 Difference]: Finished difference Result 1557 states and 1731 transitions. [2024-09-12 15:41:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-12 15:41:10,515 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:10,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:10,524 INFO L225 Difference]: With dead ends: 1557 [2024-09-12 15:41:10,524 INFO L226 Difference]: Without dead ends: 1535 [2024-09-12 15:41:10,541 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2939, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:10,541 INFO L434 NwaCegarLoop]: 101 mSDtfsCounter, 107 mSDsluCounter, 3798 mSDsCounter, 0 mSdLazyCounter, 3036 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 3899 SdHoareTripleChecker+Invalid, 3037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:10,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [109 Valid, 3899 Invalid, 3037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3036 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2024-09-12 15:41:10,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2024-09-12 15:41:11,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1535. [2024-09-12 15:41:11,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1535 states, 1379 states have (on average 1.1247280638143582) internal successors, (1551), 1477 states have internal predecessors, (1551), 54 states have call successors, (54), 5 states have call predecessors, (54), 101 states have return successors, (103), 52 states have call predecessors, (103), 52 states have call successors, (103) [2024-09-12 15:41:11,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1535 states to 1535 states and 1708 transitions. [2024-09-12 15:41:11,443 INFO L78 Accepts]: Start accepts. Automaton has 1535 states and 1708 transitions. Word has length 60 [2024-09-12 15:41:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:11,443 INFO L474 AbstractCegarLoop]: Abstraction has 1535 states and 1708 transitions. [2024-09-12 15:41:11,443 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:11,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 1535 states and 1708 transitions. [2024-09-12 15:41:11,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:11,455 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:11,455 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:11,467 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2024-09-12 15:41:11,655 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2024-09-12 15:41:11,656 INFO L399 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:11,656 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:11,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1382775012, now seen corresponding path program 117 times [2024-09-12 15:41:11,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:11,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035730737] [2024-09-12 15:41:11,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:11,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:11,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:11,771 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:11,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:11,772 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:11,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:11,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:12,175 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:41:12,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035730737] [2024-09-12 15:41:12,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035730737] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371786164] [2024-09-12 15:41:12,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:12,176 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:12,177 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2024-09-12 15:41:12,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-12 15:41:12,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:12,280 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 71 conjuncts are in the unsatisfiable core [2024-09-12 15:41:12,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:41:12,580 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:12,711 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-12 15:41:12,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [371786164] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:12,711 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:12,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 50 [2024-09-12 15:41:12,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494226682] [2024-09-12 15:41:12,712 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:12,712 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:12,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:12,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:12,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=2331, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:12,712 INFO L87 Difference]: Start difference. First operand 1535 states and 1708 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:14,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:14,264 INFO L93 Difference]: Finished difference Result 1541 states and 1713 transitions. [2024-09-12 15:41:14,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-12 15:41:14,265 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:14,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:14,274 INFO L225 Difference]: With dead ends: 1541 [2024-09-12 15:41:14,274 INFO L226 Difference]: Without dead ends: 1517 [2024-09-12 15:41:14,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=145, Invalid=2935, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:14,294 INFO L434 NwaCegarLoop]: 85 mSDtfsCounter, 86 mSDsluCounter, 3180 mSDsCounter, 0 mSdLazyCounter, 2625 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 3265 SdHoareTripleChecker+Invalid, 2626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2625 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:14,294 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 3265 Invalid, 2626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2625 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:41:14,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1517 states. [2024-09-12 15:41:15,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1517 to 1517. [2024-09-12 15:41:15,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1517 states, 1364 states have (on average 1.1246334310850439) internal successors, (1534), 1460 states have internal predecessors, (1534), 53 states have call successors, (53), 5 states have call predecessors, (53), 99 states have return successors, (101), 51 states have call predecessors, (101), 51 states have call successors, (101) [2024-09-12 15:41:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1517 states to 1517 states and 1688 transitions. [2024-09-12 15:41:15,431 INFO L78 Accepts]: Start accepts. Automaton has 1517 states and 1688 transitions. Word has length 60 [2024-09-12 15:41:15,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:15,431 INFO L474 AbstractCegarLoop]: Abstraction has 1517 states and 1688 transitions. [2024-09-12 15:41:15,431 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:15,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:15,431 INFO L276 IsEmpty]: Start isEmpty. Operand 1517 states and 1688 transitions. [2024-09-12 15:41:15,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:15,447 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:15,447 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:15,459 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Ended with exit code 0 [2024-09-12 15:41:15,648 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,118 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:15,648 INFO L399 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:15,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:15,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1465326876, now seen corresponding path program 118 times [2024-09-12 15:41:15,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:15,649 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665831286] [2024-09-12 15:41:15,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:15,649 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:15,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:15,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:15,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:15,799 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:15,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:15,931 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:15,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:16,169 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:41:16,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:16,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665831286] [2024-09-12 15:41:16,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665831286] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:16,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767346297] [2024-09-12 15:41:16,170 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-12 15:41:16,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:16,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:16,171 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:16,171 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2024-09-12 15:41:16,273 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-12 15:41:16,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:16,275 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-12 15:41:16,276 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:41:16,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:16,764 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2024-09-12 15:41:16,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767346297] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:16,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:16,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 50 [2024-09-12 15:41:16,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490617141] [2024-09-12 15:41:16,765 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:16,765 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:16,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:16,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:16,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=2327, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:16,766 INFO L87 Difference]: Start difference. First operand 1517 states and 1688 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:18,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:18,295 INFO L93 Difference]: Finished difference Result 1523 states and 1693 transitions. [2024-09-12 15:41:18,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-12 15:41:18,295 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:18,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:18,304 INFO L225 Difference]: With dead ends: 1523 [2024-09-12 15:41:18,304 INFO L226 Difference]: Without dead ends: 1497 [2024-09-12 15:41:18,330 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 109 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=149, Invalid=2931, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:18,331 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 67 mSDsluCounter, 2431 mSDsCounter, 0 mSdLazyCounter, 2134 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 2500 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:18,331 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [69 Valid, 2500 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2134 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-12 15:41:18,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1497 states. [2024-09-12 15:41:19,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1497 to 1497. [2024-09-12 15:41:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1347 states have (on average 1.1247216035634744) internal successors, (1515), 1441 states have internal predecessors, (1515), 52 states have call successors, (52), 5 states have call predecessors, (52), 97 states have return successors, (99), 50 states have call predecessors, (99), 50 states have call successors, (99) [2024-09-12 15:41:19,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 1666 transitions. [2024-09-12 15:41:19,148 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 1666 transitions. Word has length 60 [2024-09-12 15:41:19,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:19,148 INFO L474 AbstractCegarLoop]: Abstraction has 1497 states and 1666 transitions. [2024-09-12 15:41:19,148 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:19,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:19,148 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 1666 transitions. [2024-09-12 15:41:19,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:19,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:19,159 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:19,171 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2024-09-12 15:41:19,359 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2024-09-12 15:41:19,359 INFO L399 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:19,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:19,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1949757668, now seen corresponding path program 119 times [2024-09-12 15:41:19,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:19,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825518491] [2024-09-12 15:41:19,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:19,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:19,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:19,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:19,471 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:19,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:19,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:19,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:19,812 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:41:19,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:19,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825518491] [2024-09-12 15:41:19,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825518491] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:19,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837604306] [2024-09-12 15:41:19,812 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-12 15:41:19,812 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:19,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:19,813 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:19,814 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2024-09-12 15:41:19,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-12 15:41:19,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:19,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-12 15:41:19,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:20,286 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:41:20,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 104 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-12 15:41:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837604306] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:20,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 50 [2024-09-12 15:41:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234204520] [2024-09-12 15:41:20,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:20,408 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:20,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:20,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=2323, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:20,409 INFO L87 Difference]: Start difference. First operand 1497 states and 1666 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:21,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:21,750 INFO L93 Difference]: Finished difference Result 1503 states and 1671 transitions. [2024-09-12 15:41:21,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2024-09-12 15:41:21,750 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:21,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:21,759 INFO L225 Difference]: With dead ends: 1503 [2024-09-12 15:41:21,759 INFO L226 Difference]: Without dead ends: 1475 [2024-09-12 15:41:21,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 107 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=153, Invalid=2927, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:21,778 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 47 mSDsluCounter, 1792 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 1842 SdHoareTripleChecker+Invalid, 1760 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:21,778 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 1842 Invalid, 1760 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:41:21,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2024-09-12 15:41:22,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1475. [2024-09-12 15:41:22,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1475 states, 1328 states have (on average 1.125) internal successors, (1494), 1420 states have internal predecessors, (1494), 51 states have call successors, (51), 5 states have call predecessors, (51), 95 states have return successors, (97), 49 states have call predecessors, (97), 49 states have call successors, (97) [2024-09-12 15:41:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1475 states to 1475 states and 1642 transitions. [2024-09-12 15:41:22,657 INFO L78 Accepts]: Start accepts. Automaton has 1475 states and 1642 transitions. Word has length 60 [2024-09-12 15:41:22,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:22,658 INFO L474 AbstractCegarLoop]: Abstraction has 1475 states and 1642 transitions. [2024-09-12 15:41:22,658 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:22,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:22,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1475 states and 1642 transitions. [2024-09-12 15:41:22,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:22,668 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:22,668 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:22,680 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2024-09-12 15:41:22,868 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2024-09-12 15:41:22,868 INFO L399 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:22,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:22,868 INFO L85 PathProgramCache]: Analyzing trace with hash 967836435, now seen corresponding path program 120 times [2024-09-12 15:41:22,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:22,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060392531] [2024-09-12 15:41:22,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:22,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:22,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:22,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:22,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:22,935 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:22,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:23,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2024-09-12 15:41:23,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:23,219 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 15:41:23,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:23,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060392531] [2024-09-12 15:41:23,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060392531] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:23,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141801535] [2024-09-12 15:41:23,220 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-12 15:41:23,220 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:23,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:23,221 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:23,221 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2024-09-12 15:41:23,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-12 15:41:23,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:23,324 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:41:23,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:41:23,685 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:24,320 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:41:24,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141801535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:24,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:24,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-12 15:41:24,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670013882] [2024-09-12 15:41:24,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:24,321 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:41:24,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:24,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:41:24,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:24,322 INFO L87 Difference]: Start difference. First operand 1475 states and 1642 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:26,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:26,019 INFO L93 Difference]: Finished difference Result 1567 states and 1760 transitions. [2024-09-12 15:41:26,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:41:26,020 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-12 15:41:26,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:26,082 INFO L225 Difference]: With dead ends: 1567 [2024-09-12 15:41:26,082 INFO L226 Difference]: Without dead ends: 1548 [2024-09-12 15:41:26,101 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 666 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:41:26,101 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 770 mSDsCounter, 0 mSdLazyCounter, 1234 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 799 SdHoareTripleChecker+Invalid, 1253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:26,101 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 799 Invalid, 1253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1234 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:41:26,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1548 states. [2024-09-12 15:41:26,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1548 to 1544. [2024-09-12 15:41:26,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1544 states, 1358 states have (on average 1.1215022091310751) internal successors, (1523), 1476 states have internal predecessors, (1523), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2024-09-12 15:41:26,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1544 states to 1544 states and 1723 transitions. [2024-09-12 15:41:26,954 INFO L78 Accepts]: Start accepts. Automaton has 1544 states and 1723 transitions. Word has length 60 [2024-09-12 15:41:26,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:26,954 INFO L474 AbstractCegarLoop]: Abstraction has 1544 states and 1723 transitions. [2024-09-12 15:41:26,954 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:26,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:26,954 INFO L276 IsEmpty]: Start isEmpty. Operand 1544 states and 1723 transitions. [2024-09-12 15:41:26,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:26,966 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:26,966 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:26,978 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2024-09-12 15:41:27,166 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2024-09-12 15:41:27,167 INFO L399 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:27,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:27,167 INFO L85 PathProgramCache]: Analyzing trace with hash -1738894052, now seen corresponding path program 121 times [2024-09-12 15:41:27,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:27,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433883836] [2024-09-12 15:41:27,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:27,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:27,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:27,272 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:27,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:27,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:27,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:27,601 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:41:27,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433883836] [2024-09-12 15:41:27,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433883836] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:27,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676973500] [2024-09-12 15:41:27,601 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-12 15:41:27,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:27,602 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:27,602 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:27,603 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2024-09-12 15:41:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:27,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 59 conjuncts are in the unsatisfiable core [2024-09-12 15:41:27,708 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:28,140 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:41:28,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:28,259 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2024-09-12 15:41:28,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676973500] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:28,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:28,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 50 [2024-09-12 15:41:28,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999875183] [2024-09-12 15:41:28,259 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:28,259 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2024-09-12 15:41:28,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:28,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2024-09-12 15:41:28,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2319, Unknown=0, NotChecked=0, Total=2450 [2024-09-12 15:41:28,260 INFO L87 Difference]: Start difference. First operand 1544 states and 1723 transitions. Second operand has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:29,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:29,507 INFO L93 Difference]: Finished difference Result 1560 states and 1743 transitions. [2024-09-12 15:41:29,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-12 15:41:29,508 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) Word has length 60 [2024-09-12 15:41:29,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:29,525 INFO L225 Difference]: With dead ends: 1560 [2024-09-12 15:41:29,526 INFO L226 Difference]: Without dead ends: 1541 [2024-09-12 15:41:29,546 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=157, Invalid=2923, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:29,547 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 27 mSDsluCounter, 1033 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 1069 SdHoareTripleChecker+Invalid, 1117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:29,547 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 1069 Invalid, 1117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-12 15:41:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1541 states. [2024-09-12 15:41:30,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1541 to 1537. [2024-09-12 15:41:30,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1537 states, 1351 states have (on average 1.1228719467061437) internal successors, (1517), 1469 states have internal predecessors, (1517), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (136), 62 states have call predecessors, (136), 62 states have call successors, (136) [2024-09-12 15:41:30,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1537 states to 1537 states and 1717 transitions. [2024-09-12 15:41:30,506 INFO L78 Accepts]: Start accepts. Automaton has 1537 states and 1717 transitions. Word has length 60 [2024-09-12 15:41:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:30,506 INFO L474 AbstractCegarLoop]: Abstraction has 1537 states and 1717 transitions. [2024-09-12 15:41:30,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 45 states have (on average 1.3111111111111111) internal successors, (59), 45 states have internal predecessors, (59), 4 states have call successors, (7), 3 states have call predecessors, (7), 3 states have return successors, (4), 4 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-12 15:41:30,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 1537 states and 1717 transitions. [2024-09-12 15:41:30,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-12 15:41:30,519 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:30,519 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:30,530 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Ended with exit code 0 [2024-09-12 15:41:30,719 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,122 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:30,719 INFO L399 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:30,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:30,719 INFO L85 PathProgramCache]: Analyzing trace with hash -919584205, now seen corresponding path program 122 times [2024-09-12 15:41:30,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:30,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636416357] [2024-09-12 15:41:30,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:30,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:30,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:30,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:30,910 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2024-09-12 15:41:30,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:31,077 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2024-09-12 15:41:31,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636416357] [2024-09-12 15:41:31,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636416357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:31,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830857761] [2024-09-12 15:41:31,077 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-12 15:41:31,077 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:31,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:31,078 INFO L229 MonitoredProcess]: Starting monitored process 123 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:31,079 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2024-09-12 15:41:31,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-12 15:41:31,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:31,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-12 15:41:31,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:31,553 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:41:31,553 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-12 15:41:32,169 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-12 15:41:32,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1830857761] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-12 15:41:32,170 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-12 15:41:32,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 21, 21] total 56 [2024-09-12 15:41:32,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790317496] [2024-09-12 15:41:32,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-12 15:41:32,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2024-09-12 15:41:32,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-12 15:41:32,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2024-09-12 15:41:32,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=2879, Unknown=0, NotChecked=0, Total=3080 [2024-09-12 15:41:32,171 INFO L87 Difference]: Start difference. First operand 1537 states and 1717 transitions. Second operand has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:34,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-12 15:41:34,005 INFO L93 Difference]: Finished difference Result 1549 states and 1728 transitions. [2024-09-12 15:41:34,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-12 15:41:34,006 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) Word has length 60 [2024-09-12 15:41:34,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-12 15:41:34,020 INFO L225 Difference]: With dead ends: 1549 [2024-09-12 15:41:34,020 INFO L226 Difference]: Without dead ends: 1521 [2024-09-12 15:41:34,049 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 90 SyntacticMatches, 3 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=315, Invalid=4377, Unknown=0, NotChecked=0, Total=4692 [2024-09-12 15:41:34,049 INFO L434 NwaCegarLoop]: 29 mSDtfsCounter, 14 mSDsluCounter, 916 mSDsCounter, 0 mSdLazyCounter, 1422 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 945 SdHoareTripleChecker+Invalid, 1441 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 1422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-12 15:41:34,049 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 945 Invalid, 1441 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 1422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-12 15:41:34,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1521 states. [2024-09-12 15:41:35,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1521 to 1519. [2024-09-12 15:41:35,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1519 states, 1333 states have (on average 1.1230307576894223) internal successors, (1497), 1451 states have internal predecessors, (1497), 64 states have call successors, (64), 5 states have call predecessors, (64), 121 states have return successors, (124), 62 states have call predecessors, (124), 62 states have call successors, (124) [2024-09-12 15:41:35,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1519 states to 1519 states and 1685 transitions. [2024-09-12 15:41:35,104 INFO L78 Accepts]: Start accepts. Automaton has 1519 states and 1685 transitions. Word has length 60 [2024-09-12 15:41:35,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-12 15:41:35,105 INFO L474 AbstractCegarLoop]: Abstraction has 1519 states and 1685 transitions. [2024-09-12 15:41:35,105 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.3928571428571428) internal successors, (78), 56 states have internal predecessors, (78), 3 states have call successors, (5), 2 states have call predecessors, (5), 3 states have return successors, (3), 3 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-12 15:41:35,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:35,105 INFO L276 IsEmpty]: Start isEmpty. Operand 1519 states and 1685 transitions. [2024-09-12 15:41:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-12 15:41:35,117 INFO L208 NwaCegarLoop]: Found error trace [2024-09-12 15:41:35,117 INFO L216 NwaCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-12 15:41:35,129 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2024-09-12 15:41:35,317 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:35,317 INFO L399 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-12 15:41:35,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-12 15:41:35,317 INFO L85 PathProgramCache]: Analyzing trace with hash 54732603, now seen corresponding path program 123 times [2024-09-12 15:41:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-12 15:41:35,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146834504] [2024-09-12 15:41:35,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-12 15:41:35,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-12 15:41:35,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:35,410 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-12 15:41:35,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:35,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2024-09-12 15:41:35,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:35,602 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 31 [2024-09-12 15:41:35,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-12 15:41:35,982 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:35,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-12 15:41:35,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146834504] [2024-09-12 15:41:35,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146834504] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-12 15:41:35,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840638270] [2024-09-12 15:41:35,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-12 15:41:35,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-12 15:41:35,983 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-12 15:41:35,984 INFO L229 MonitoredProcess]: Starting monitored process 124 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-12 15:41:35,985 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2024-09-12 15:41:36,092 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-12 15:41:36,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-12 15:41:36,093 INFO L262 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-12 15:41:36,094 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-12 15:41:37,095 INFO L134 CoverageAnalysis]: Checked inductivity of 229 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-12 15:41:37,095 INFO L327 TraceCheckSpWp]: Computing backward predicates...