./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de31.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 04d6fb36 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/in-de31.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 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 --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-tmp.dk.referee-eval-04d6fb3-m [2024-09-15 18:46:44,879 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:46:44,951 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:46:44,958 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:46:44,959 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:46:44,982 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:46:44,982 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:46:44,983 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:46:44,983 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:46:44,985 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:46:44,985 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:46:44,985 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:46:44,986 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:46:44,986 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:46:44,987 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:46:44,988 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:46:44,989 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:46:44,989 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:46:44,989 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:46:44,989 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:46:44,989 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:46:44,993 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:46:44,993 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:46:44,993 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:46:44,994 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:46:44,994 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:46:44,994 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:46:44,994 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:46:44,994 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:46:44,995 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:46:44,995 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:46:44,995 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:46:44,995 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:46:45,007 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:46:45,008 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:46:45,008 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:46:45,008 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:46:45,008 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:46:45,008 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:46:45,009 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:46:45,009 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:46:45,011 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:46:45,011 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 28f1f7a35f3c64149ac63836a12126d2f43ea1d4c4384507ba9d3ae156113818 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:46:45,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:46:45,359 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:46:45,363 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:46:45,364 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:46:45,364 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:46:45,366 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-09-15 18:46:46,900 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:46:47,097 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:46:47,097 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de31.c [2024-09-15 18:46:47,103 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/ae0ddd3f1/47553c80f8c54610a7df06dc25f903a1/FLAGa94a5bcf7 [2024-09-15 18:46:47,482 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/ae0ddd3f1/47553c80f8c54610a7df06dc25f903a1 [2024-09-15 18:46:47,484 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:46:47,485 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:46:47,487 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:46:47,487 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:46:47,493 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:46:47,494 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,495 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@190ece08 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47, skipping insertion in model container [2024-09-15 18:46:47,495 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,511 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:46:47,635 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2024-09-15 18:46:47,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:46:47,659 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:46:47,670 WARN L248 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de31.c[368,381] [2024-09-15 18:46:47,673 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:46:47,693 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:46:47,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47 WrapperNode [2024-09-15 18:46:47,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:46:47,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:46:47,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:46:47,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:46:47,706 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,713 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,720 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:46:47,720 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:46:47,721 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:46:47,722 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:46:47,722 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:46:47,731 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,731 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,732 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,744 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]. [2024-09-15 18:46:47,744 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,744 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,751 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,756 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,757 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,758 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,763 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:46:47,764 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:46:47,764 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:46:47,764 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:46:47,765 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (1/1) ... [2024-09-15 18:46:47,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:46:47,783 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:47,803 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) [2024-09-15 18:46:47,810 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 [2024-09-15 18:46:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:46:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:46:47,851 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:46:47,851 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:46:47,852 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:46:47,852 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:46:47,852 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:46:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:46:47,853 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:46:47,854 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:46:47,924 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:46:47,926 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:46:48,090 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-15 18:46:48,092 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:46:48,116 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:46:48,119 INFO L318 CfgBuilder]: Removed 3 assume(true) statements. [2024-09-15 18:46:48,120 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:46:48 BoogieIcfgContainer [2024-09-15 18:46:48,120 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:46:48,136 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:46:48,136 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:46:48,140 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:46:48,140 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:46:47" (1/3) ... [2024-09-15 18:46:48,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f05b3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:46:48, skipping insertion in model container [2024-09-15 18:46:48,141 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:46:47" (2/3) ... [2024-09-15 18:46:48,141 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7f05b3d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:46:48, skipping insertion in model container [2024-09-15 18:46:48,142 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:46:48" (3/3) ... [2024-09-15 18:46:48,143 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de31.c [2024-09-15 18:46:48,160 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:46:48,161 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:46:48,224 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:46:48,232 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;@21940eb4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:46:48,232 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:46:48,237 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-09-15 18:46:48,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:46:48,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:48,244 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:48,244 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:48,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:48,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1284096195, now seen corresponding path program 1 times [2024-09-15 18:46:48,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:48,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674323062] [2024-09-15 18:46:48,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:48,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:48,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:48,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:48,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:48,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674323062] [2024-09-15 18:46:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674323062] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:46:48,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:46:48,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 18:46:48,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35705754] [2024-09-15 18:46:48,392 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:46:48,397 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 18:46:48,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:48,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 18:46:48,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 18:46:48,422 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 13 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:48,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:48,450 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2024-09-15 18:46:48,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 18:46:48,453 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-15 18:46:48,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:48,459 INFO L225 Difference]: With dead ends: 34 [2024-09-15 18:46:48,459 INFO L226 Difference]: Without dead ends: 14 [2024-09-15 18:46:48,462 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 18:46:48,468 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 2 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 2 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:48,470 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:46:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-15 18:46:48,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-15 18:46:48,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:48,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2024-09-15 18:46:48,506 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 13 [2024-09-15 18:46:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:48,506 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2024-09-15 18:46:48,506 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:48,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:48,508 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2024-09-15 18:46:48,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-15 18:46:48,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:48,509 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:48,509 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:46:48,510 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:48,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:48,514 INFO L85 PathProgramCache]: Analyzing trace with hash 334597057, now seen corresponding path program 1 times [2024-09-15 18:46:48,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:48,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260032212] [2024-09-15 18:46:48,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:48,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:48,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:48,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260032212] [2024-09-15 18:46:48,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260032212] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:46:48,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:46:48,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-15 18:46:48,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556038841] [2024-09-15 18:46:48,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:46:48,942 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-15 18:46:48,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:48,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-15 18:46:48,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:46:48,943 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:49,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:49,084 INFO L93 Difference]: Finished difference Result 30 states and 38 transitions. [2024-09-15 18:46:49,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-15 18:46:49,085 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-09-15 18:46:49,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:49,087 INFO L225 Difference]: With dead ends: 30 [2024-09-15 18:46:49,088 INFO L226 Difference]: Without dead ends: 24 [2024-09-15 18:46:49,088 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:46:49,090 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 21 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:49,090 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 58 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:46:49,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-15 18:46:49,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2024-09-15 18:46:49,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:49,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 22 transitions. [2024-09-15 18:46:49,100 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 22 transitions. Word has length 13 [2024-09-15 18:46:49,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:49,100 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 22 transitions. [2024-09-15 18:46:49,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.125) internal successors, (9), 7 states have internal predecessors, (9), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,102 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 22 transitions. [2024-09-15 18:46:49,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:46:49,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:49,102 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:49,103 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:46:49,103 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:49,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1818111943, now seen corresponding path program 1 times [2024-09-15 18:46:49,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:49,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748197631] [2024-09-15 18:46:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:49,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:49,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:49,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:49,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:49,202 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:49,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:49,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748197631] [2024-09-15 18:46:49,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748197631] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:46:49,203 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:46:49,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-15 18:46:49,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399804574] [2024-09-15 18:46:49,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:46:49,207 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-15 18:46:49,207 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:49,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-15 18:46:49,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:46:49,208 INFO L87 Difference]: Start difference. First operand 18 states and 22 transitions. Second operand has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-09-15 18:46:49,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:49,231 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2024-09-15 18:46:49,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-15 18:46:49,231 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 18:46:49,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:49,232 INFO L225 Difference]: With dead ends: 24 [2024-09-15 18:46:49,232 INFO L226 Difference]: Without dead ends: 15 [2024-09-15 18:46:49,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-15 18:46:49,233 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:49,234 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 23 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:46:49,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-15 18:46:49,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-15 18:46:49,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.3) internal successors, (13), 10 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:49,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 17 transitions. [2024-09-15 18:46:49,237 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 17 transitions. Word has length 14 [2024-09-15 18:46:49,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:49,238 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 17 transitions. [2024-09-15 18:46:49,238 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 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) [2024-09-15 18:46:49,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,238 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 17 transitions. [2024-09-15 18:46:49,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:46:49,239 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:49,239 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:49,239 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-09-15 18:46:49,239 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:49,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,240 INFO L85 PathProgramCache]: Analyzing trace with hash -1658494539, now seen corresponding path program 1 times [2024-09-15 18:46:49,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:49,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402076143] [2024-09-15 18:46:49,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:49,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:49,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:49,362 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:49,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:49,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:49,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402076143] [2024-09-15 18:46:49,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402076143] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:49,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784680263] [2024-09-15 18:46:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:49,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:49,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:49,375 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) [2024-09-15 18:46:49,376 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-15 18:46:49,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:49,426 INFO L262 TraceCheckSpWp]: Trace formula consists of 51 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:46:49,433 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:46:49,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:49,467 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:49,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:49,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784680263] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:49,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:49,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-15 18:46:49,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641670118] [2024-09-15 18:46:49,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:49,521 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:46:49,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:49,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:46:49,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:46:49,523 INFO L87 Difference]: Start difference. First operand 15 states and 17 transitions. Second operand has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-09-15 18:46:49,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:49,648 INFO L93 Difference]: Finished difference Result 38 states and 54 transitions. [2024-09-15 18:46:49,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:46:49,648 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2024-09-15 18:46:49,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:49,650 INFO L225 Difference]: With dead ends: 38 [2024-09-15 18:46:49,650 INFO L226 Difference]: Without dead ends: 32 [2024-09-15 18:46:49,651 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:46:49,652 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 25 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:49,652 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 56 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:46:49,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-15 18:46:49,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2024-09-15 18:46:49,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 34 transitions. [2024-09-15 18:46:49,660 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 34 transitions. Word has length 14 [2024-09-15 18:46:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:49,660 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 34 transitions. [2024-09-15 18:46:49,660 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 9 states have internal predecessors, (17), 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) [2024-09-15 18:46:49,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 34 transitions. [2024-09-15 18:46:49,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 18:46:49,662 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:49,662 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:49,678 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-15 18:46:49,862 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:49,863 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:49,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:49,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1294830822, now seen corresponding path program 1 times [2024-09-15 18:46:49,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:49,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872434509] [2024-09-15 18:46:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:49,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:49,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:50,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:50,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:50,320 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:50,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872434509] [2024-09-15 18:46:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872434509] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:50,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294681804] [2024-09-15 18:46:50,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:50,321 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:50,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:50,323 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) [2024-09-15 18:46:50,328 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-15 18:46:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:50,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:46:50,374 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:46:50,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:50,607 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:50,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:50,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294681804] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:50,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:50,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-15 18:46:50,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279397122] [2024-09-15 18:46:50,809 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:50,809 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-15 18:46:50,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:50,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-15 18:46:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:46:50,814 INFO L87 Difference]: Start difference. First operand 27 states and 34 transitions. Second operand has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:51,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:51,466 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2024-09-15 18:46:51,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-15 18:46:51,468 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-15 18:46:51,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:51,469 INFO L225 Difference]: With dead ends: 46 [2024-09-15 18:46:51,469 INFO L226 Difference]: Without dead ends: 29 [2024-09-15 18:46:51,469 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=176, Invalid=880, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:46:51,470 INFO L434 NwaCegarLoop]: 8 mSDtfsCounter, 39 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:51,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 67 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:46:51,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-15 18:46:51,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 24. [2024-09-15 18:46:51,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.368421052631579) internal successors, (26), 19 states have internal predecessors, (26), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 30 transitions. [2024-09-15 18:46:51,490 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 30 transitions. Word has length 16 [2024-09-15 18:46:51,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:51,490 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 30 transitions. [2024-09-15 18:46:51,491 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.4) internal successors, (28), 18 states have internal predecessors, (28), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:51,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:51,491 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 30 transitions. [2024-09-15 18:46:51,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 18:46:51,491 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:51,492 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:51,509 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-15 18:46:51,692 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:51,692 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:51,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:51,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1389270847, now seen corresponding path program 2 times [2024-09-15 18:46:51,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:51,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057805417] [2024-09-15 18:46:51,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:51,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:51,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:51,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:51,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:51,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:51,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057805417] [2024-09-15 18:46:51,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057805417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:51,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537449523] [2024-09-15 18:46:51,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:46:51,813 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:51,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:51,816 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) [2024-09-15 18:46:51,817 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-15 18:46:51,855 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:46:51,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:46:51,856 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:46:51,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:46:51,883 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:51,883 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:51,997 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:51,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537449523] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:51,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:51,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-15 18:46:51,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180239150] [2024-09-15 18:46:51,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:51,998 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:46:51,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:51,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:46:51,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:46:51,999 INFO L87 Difference]: Start difference. First operand 24 states and 30 transitions. Second operand has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 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) [2024-09-15 18:46:52,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:52,572 INFO L93 Difference]: Finished difference Result 76 states and 117 transitions. [2024-09-15 18:46:52,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:46:52,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-15 18:46:52,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:52,574 INFO L225 Difference]: With dead ends: 76 [2024-09-15 18:46:52,576 INFO L226 Difference]: Without dead ends: 70 [2024-09-15 18:46:52,577 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2024-09-15 18:46:52,577 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 114 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:52,579 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 104 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:46:52,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-15 18:46:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2024-09-15 18:46:52,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.394736842105263) internal successors, (53), 38 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:52,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 57 transitions. [2024-09-15 18:46:52,600 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 57 transitions. Word has length 17 [2024-09-15 18:46:52,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:52,600 INFO L474 AbstractCegarLoop]: Abstraction has 43 states and 57 transitions. [2024-09-15 18:46:52,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.5333333333333334) internal successors, (23), 15 states have internal predecessors, (23), 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) [2024-09-15 18:46:52,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:52,601 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 57 transitions. [2024-09-15 18:46:52,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 18:46:52,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:52,601 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:52,619 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-15 18:46:52,805 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-15 18:46:52,806 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:52,807 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:52,807 INFO L85 PathProgramCache]: Analyzing trace with hash -648933578, now seen corresponding path program 2 times [2024-09-15 18:46:52,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:52,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873563617] [2024-09-15 18:46:52,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:52,808 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:52,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:52,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:52,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:52,899 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:46:52,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:52,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873563617] [2024-09-15 18:46:52,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873563617] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:52,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508027878] [2024-09-15 18:46:52,900 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:46:52,900 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:52,901 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:52,902 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) [2024-09-15 18:46:52,904 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-15 18:46:52,941 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:46:52,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:46:52,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:46:52,944 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:46:52,974 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:46:52,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:53,045 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:46:53,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508027878] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:53,045 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:53,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 6] total 13 [2024-09-15 18:46:53,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569886355] [2024-09-15 18:46:53,046 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:53,046 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-15 18:46:53,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:53,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-15 18:46:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-15 18:46:53,047 INFO L87 Difference]: Start difference. First operand 43 states and 57 transitions. Second operand has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:53,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:46:53,175 INFO L93 Difference]: Finished difference Result 70 states and 94 transitions. [2024-09-15 18:46:53,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-15 18:46:53,175 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2024-09-15 18:46:53,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:46:53,176 INFO L225 Difference]: With dead ends: 70 [2024-09-15 18:46:53,176 INFO L226 Difference]: Without dead ends: 59 [2024-09-15 18:46:53,177 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:46:53,177 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:46:53,178 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 73 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:46:53,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-15 18:46:53,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 50. [2024-09-15 18:46:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.4222222222222223) internal successors, (64), 45 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:53,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 68 transitions. [2024-09-15 18:46:53,199 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 68 transitions. Word has length 18 [2024-09-15 18:46:53,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:46:53,200 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 68 transitions. [2024-09-15 18:46:53,200 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.8461538461538463) internal successors, (24), 13 states have internal predecessors, (24), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:53,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:53,201 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 68 transitions. [2024-09-15 18:46:53,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-15 18:46:53,201 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:46:53,202 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:46:53,220 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-15 18:46:53,402 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:53,402 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:46:53,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:46:53,403 INFO L85 PathProgramCache]: Analyzing trace with hash 891793825, now seen corresponding path program 3 times [2024-09-15 18:46:53,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:46:53,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387923204] [2024-09-15 18:46:53,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:46:53,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:46:53,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:53,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:46:53,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:46:53,812 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:53,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:46:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387923204] [2024-09-15 18:46:53,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [387923204] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:46:53,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489268224] [2024-09-15 18:46:53,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:46:53,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:46:53,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:46:53,815 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) [2024-09-15 18:46:53,816 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-15 18:46:53,863 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-15 18:46:53,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:46:53,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:46:53,869 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:46:54,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:54,193 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:46:54,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:46:54,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489268224] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:46:54,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:46:54,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2024-09-15 18:46:54,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360524395] [2024-09-15 18:46:54,542 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:46:54,542 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:46:54,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:46:54,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:46:54,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=472, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:46:54,544 INFO L87 Difference]: Start difference. First operand 50 states and 68 transitions. Second operand has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:46:58,645 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:47:00,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:00,428 INFO L93 Difference]: Finished difference Result 92 states and 119 transitions. [2024-09-15 18:47:00,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-09-15 18:47:00,428 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-15 18:47:00,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:00,429 INFO L225 Difference]: With dead ends: 92 [2024-09-15 18:47:00,430 INFO L226 Difference]: Without dead ends: 69 [2024-09-15 18:47:00,431 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 363 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2024-09-15 18:47:00,431 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 27 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 15 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:00,432 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 156 Invalid, 399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 383 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-15 18:47:00,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-15 18:47:00,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 50. [2024-09-15 18:47:00,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.4) internal successors, (63), 45 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:00,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 67 transitions. [2024-09-15 18:47:00,457 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 67 transitions. Word has length 19 [2024-09-15 18:47:00,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:00,457 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 67 transitions. [2024-09-15 18:47:00,457 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.375) internal successors, (33), 22 states have internal predecessors, (33), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:00,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:00,458 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 67 transitions. [2024-09-15 18:47:00,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 18:47:00,459 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:00,460 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:00,477 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-15 18:47:00,660 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-15 18:47:00,661 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:00,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:00,661 INFO L85 PathProgramCache]: Analyzing trace with hash 374216051, now seen corresponding path program 4 times [2024-09-15 18:47:00,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:00,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374522314] [2024-09-15 18:47:00,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:00,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:00,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:00,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:00,793 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:00,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374522314] [2024-09-15 18:47:00,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374522314] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:00,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913364509] [2024-09-15 18:47:00,794 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:00,794 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:00,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:00,796 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) [2024-09-15 18:47:00,798 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-15 18:47:00,843 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:00,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:00,844 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-15 18:47:00,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:00,896 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:01,026 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:01,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913364509] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:01,027 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:01,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 8] total 18 [2024-09-15 18:47:01,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032554229] [2024-09-15 18:47:01,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:01,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-15 18:47:01,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:01,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-15 18:47:01,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2024-09-15 18:47:01,031 INFO L87 Difference]: Start difference. First operand 50 states and 67 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:01,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:01,290 INFO L93 Difference]: Finished difference Result 82 states and 110 transitions. [2024-09-15 18:47:01,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 18:47:01,291 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-15 18:47:01,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:01,292 INFO L225 Difference]: With dead ends: 82 [2024-09-15 18:47:01,292 INFO L226 Difference]: Without dead ends: 66 [2024-09-15 18:47:01,293 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:47:01,295 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 9 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 146 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:01,295 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 74 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 146 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:01,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-15 18:47:01,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 55. [2024-09-15 18:47:01,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.38) internal successors, (69), 50 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:01,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 73 transitions. [2024-09-15 18:47:01,324 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 73 transitions. Word has length 21 [2024-09-15 18:47:01,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:01,324 INFO L474 AbstractCegarLoop]: Abstraction has 55 states and 73 transitions. [2024-09-15 18:47:01,325 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 18 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:01,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:01,325 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 73 transitions. [2024-09-15 18:47:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 18:47:01,327 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:01,327 INFO L216 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:01,346 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:01,527 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:01,528 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:01,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:01,529 INFO L85 PathProgramCache]: Analyzing trace with hash -1067065486, now seen corresponding path program 5 times [2024-09-15 18:47:01,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:01,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987620678] [2024-09-15 18:47:01,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:01,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:01,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:01,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:01,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:01,685 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:01,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:01,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987620678] [2024-09-15 18:47:01,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987620678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:01,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650234944] [2024-09-15 18:47:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:01,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:01,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:01,689 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) [2024-09-15 18:47:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-15 18:47:01,734 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:47:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:01,735 INFO L262 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 18:47:01,738 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:01,781 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:01,782 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:01,927 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:01,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650234944] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:01,927 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:01,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-15 18:47:01,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473829618] [2024-09-15 18:47:01,928 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:01,928 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:47:01,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:01,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:47:01,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:47:01,930 INFO L87 Difference]: Start difference. First operand 55 states and 73 transitions. Second operand has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2024-09-15 18:47:03,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:03,940 INFO L93 Difference]: Finished difference Result 152 states and 221 transitions. [2024-09-15 18:47:03,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2024-09-15 18:47:03,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2024-09-15 18:47:03,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:03,942 INFO L225 Difference]: With dead ends: 152 [2024-09-15 18:47:03,942 INFO L226 Difference]: Without dead ends: 142 [2024-09-15 18:47:03,943 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1353, Invalid=3617, Unknown=0, NotChecked=0, Total=4970 [2024-09-15 18:47:03,944 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 229 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:03,944 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 175 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:03,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-09-15 18:47:03,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 75. [2024-09-15 18:47:03,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:03,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2024-09-15 18:47:03,969 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 21 [2024-09-15 18:47:03,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:03,969 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2024-09-15 18:47:03,969 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 21 states have internal predecessors, (30), 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) [2024-09-15 18:47:03,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:03,970 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2024-09-15 18:47:03,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:47:03,971 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:03,971 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:03,983 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:04,173 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:04,173 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:04,174 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:04,174 INFO L85 PathProgramCache]: Analyzing trace with hash 380377990, now seen corresponding path program 6 times [2024-09-15 18:47:04,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:04,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173241797] [2024-09-15 18:47:04,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:04,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:04,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:04,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:04,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:04,627 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:04,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:04,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173241797] [2024-09-15 18:47:04,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173241797] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:04,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650339841] [2024-09-15 18:47:04,629 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:04,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:04,629 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:04,631 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) [2024-09-15 18:47:04,633 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-15 18:47:04,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:47:04,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:04,687 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-15 18:47:04,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:04,979 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:04,980 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650339841] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:05,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 29 [2024-09-15 18:47:05,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2084031291] [2024-09-15 18:47:05,372 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:05,372 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-15 18:47:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:05,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-15 18:47:05,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2024-09-15 18:47:05,373 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:09,481 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:47:10,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:10,925 INFO L93 Difference]: Finished difference Result 128 states and 164 transitions. [2024-09-15 18:47:10,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-09-15 18:47:10,926 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-15 18:47:10,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:10,927 INFO L225 Difference]: With dead ends: 128 [2024-09-15 18:47:10,927 INFO L226 Difference]: Without dead ends: 100 [2024-09-15 18:47:10,928 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=316, Invalid=2234, Unknown=0, NotChecked=0, Total=2550 [2024-09-15 18:47:10,928 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 43 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 347 mSolverCounterSat, 23 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 126 SdHoareTripleChecker+Invalid, 371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 347 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:10,928 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 126 Invalid, 371 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 347 Invalid, 1 Unknown, 0 Unchecked, 4.4s Time] [2024-09-15 18:47:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2024-09-15 18:47:10,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 74. [2024-09-15 18:47:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 69 states have internal predecessors, (95), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 99 transitions. [2024-09-15 18:47:10,960 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 99 transitions. Word has length 22 [2024-09-15 18:47:10,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:10,960 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 99 transitions. [2024-09-15 18:47:10,960 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 27 states have internal predecessors, (40), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:10,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 99 transitions. [2024-09-15 18:47:10,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 18:47:10,961 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:10,961 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:10,975 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-15 18:47:11,162 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:11,162 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:11,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:11,163 INFO L85 PathProgramCache]: Analyzing trace with hash -652374634, now seen corresponding path program 7 times [2024-09-15 18:47:11,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:11,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016274007] [2024-09-15 18:47:11,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:11,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:11,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:11,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:11,307 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:11,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016274007] [2024-09-15 18:47:11,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016274007] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:11,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437995095] [2024-09-15 18:47:11,308 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:11,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:11,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:11,310 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) [2024-09-15 18:47:11,312 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-15 18:47:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:11,356 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-15 18:47:11,358 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:11,423 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:11,423 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:11,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:11,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437995095] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:11,581 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:11,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 10] total 23 [2024-09-15 18:47:11,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534703921] [2024-09-15 18:47:11,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:11,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-15 18:47:11,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:11,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-15 18:47:11,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2024-09-15 18:47:11,582 INFO L87 Difference]: Start difference. First operand 74 states and 99 transitions. Second operand has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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) [2024-09-15 18:47:11,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:11,892 INFO L93 Difference]: Finished difference Result 117 states and 158 transitions. [2024-09-15 18:47:11,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:47:11,892 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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 24 [2024-09-15 18:47:11,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:11,893 INFO L225 Difference]: With dead ends: 117 [2024-09-15 18:47:11,893 INFO L226 Difference]: Without dead ends: 98 [2024-09-15 18:47:11,894 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:47:11,894 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 11 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 284 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 284 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:11,894 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 118 Invalid, 304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 284 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:11,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2024-09-15 18:47:11,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 81. [2024-09-15 18:47:11,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 76 states have (on average 1.381578947368421) internal successors, (105), 76 states have internal predecessors, (105), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:11,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 109 transitions. [2024-09-15 18:47:11,926 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 109 transitions. Word has length 24 [2024-09-15 18:47:11,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:11,926 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 109 transitions. [2024-09-15 18:47:11,927 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 23 states have internal predecessors, (34), 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) [2024-09-15 18:47:11,927 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:11,927 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 109 transitions. [2024-09-15 18:47:11,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-15 18:47:11,928 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:11,928 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:11,942 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:12,128 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-15 18:47:12,129 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:12,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:12,129 INFO L85 PathProgramCache]: Analyzing trace with hash 247533441, now seen corresponding path program 8 times [2024-09-15 18:47:12,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:12,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883615746] [2024-09-15 18:47:12,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:12,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:12,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:12,638 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:12,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:12,640 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:12,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883615746] [2024-09-15 18:47:12,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883615746] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:12,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034920696] [2024-09-15 18:47:12,641 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:12,641 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:12,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:12,643 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) [2024-09-15 18:47:12,644 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-15 18:47:12,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:12,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:12,691 INFO L262 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:47:12,692 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:13,033 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:13,033 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:13,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2034920696] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:13,718 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:13,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 41 [2024-09-15 18:47:13,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429820320] [2024-09-15 18:47:13,719 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:13,719 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-15 18:47:13,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:13,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-15 18:47:13,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=1458, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 18:47:13,720 INFO L87 Difference]: Start difference. First operand 81 states and 109 transitions. Second operand has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:17,855 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:47:19,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:19,613 INFO L93 Difference]: Finished difference Result 138 states and 176 transitions. [2024-09-15 18:47:19,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:47:19,614 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-15 18:47:19,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:19,615 INFO L225 Difference]: With dead ends: 138 [2024-09-15 18:47:19,615 INFO L226 Difference]: Without dead ends: 103 [2024-09-15 18:47:19,616 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 763 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=438, Invalid=3468, Unknown=0, NotChecked=0, Total=3906 [2024-09-15 18:47:19,617 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 46 mSDsluCounter, 211 mSDsCounter, 0 mSdLazyCounter, 706 mSolverCounterSat, 29 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 706 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:19,617 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 224 Invalid, 736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 706 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-15 18:47:19,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2024-09-15 18:47:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2024-09-15 18:47:19,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.4) internal successors, (98), 70 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 102 transitions. [2024-09-15 18:47:19,647 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 102 transitions. Word has length 25 [2024-09-15 18:47:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:19,647 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 102 transitions. [2024-09-15 18:47:19,648 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 39 states have internal predecessors, (53), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:19,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,648 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 102 transitions. [2024-09-15 18:47:19,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:19,649 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:19,649 INFO L216 NwaCegarLoop]: trace histogram [7, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:19,662 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:19,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-15 18:47:19,849 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:19,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:19,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1123125963, now seen corresponding path program 9 times [2024-09-15 18:47:19,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:19,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130804727] [2024-09-15 18:47:19,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:19,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:19,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:20,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130804727] [2024-09-15 18:47:20,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130804727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494260852] [2024-09-15 18:47:20,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:20,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:20,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:20,072 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) [2024-09-15 18:47:20,074 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-15 18:47:20,117 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:47:20,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:20,120 INFO L262 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-15 18:47:20,122 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:20,221 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:47:20,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:20,354 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:47:20,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494260852] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:20,354 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:20,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 24 [2024-09-15 18:47:20,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951316758] [2024-09-15 18:47:20,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:20,355 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:47:20,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:20,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:47:20,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=455, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:47:20,356 INFO L87 Difference]: Start difference. First operand 75 states and 102 transitions. Second operand has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2024-09-15 18:47:21,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:21,007 INFO L93 Difference]: Finished difference Result 126 states and 170 transitions. [2024-09-15 18:47:21,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:47:21,007 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-15 18:47:21,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:21,008 INFO L225 Difference]: With dead ends: 126 [2024-09-15 18:47:21,008 INFO L226 Difference]: Without dead ends: 112 [2024-09-15 18:47:21,009 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 45 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=428, Invalid=1828, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:47:21,009 INFO L434 NwaCegarLoop]: 14 mSDtfsCounter, 104 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:21,009 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [104 Valid, 155 Invalid, 624 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:21,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2024-09-15 18:47:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 82. [2024-09-15 18:47:21,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 77 states have internal predecessors, (100), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:21,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 104 transitions. [2024-09-15 18:47:21,047 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 104 transitions. Word has length 26 [2024-09-15 18:47:21,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:21,047 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 104 transitions. [2024-09-15 18:47:21,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 24 states have internal predecessors, (37), 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) [2024-09-15 18:47:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,048 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 104 transitions. [2024-09-15 18:47:21,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:21,048 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:21,048 INFO L216 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:21,061 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:21,249 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-15 18:47:21,249 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:21,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1699490485, now seen corresponding path program 3 times [2024-09-15 18:47:21,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:21,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829765246] [2024-09-15 18:47:21,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:21,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,485 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:21,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,488 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:21,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829765246] [2024-09-15 18:47:21,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829765246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:21,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414519731] [2024-09-15 18:47:21,488 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:21,489 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:21,489 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:21,491 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) [2024-09-15 18:47:21,492 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-15 18:47:21,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-15 18:47:21,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:21,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 18:47:21,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:21,595 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:21,595 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:22,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1414519731] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:22,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:22,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-15 18:47:22,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45000940] [2024-09-15 18:47:22,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:22,015 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:47:22,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:22,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:47:22,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:47:22,016 INFO L87 Difference]: Start difference. First operand 82 states and 104 transitions. Second operand has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:27,201 INFO L93 Difference]: Finished difference Result 397 states and 540 transitions. [2024-09-15 18:47:27,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-15 18:47:27,202 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-15 18:47:27,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:27,204 INFO L225 Difference]: With dead ends: 397 [2024-09-15 18:47:27,204 INFO L226 Difference]: Without dead ends: 369 [2024-09-15 18:47:27,205 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1629 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=2044, Invalid=4598, Unknown=0, NotChecked=0, Total=6642 [2024-09-15 18:47:27,206 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 819 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 874 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 819 SdHoareTripleChecker+Valid, 456 SdHoareTripleChecker+Invalid, 1178 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:27,206 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [819 Valid, 456 Invalid, 1178 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 874 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-15 18:47:27,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2024-09-15 18:47:27,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 121. [2024-09-15 18:47:27,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.3448275862068966) internal successors, (156), 116 states have internal predecessors, (156), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 160 transitions. [2024-09-15 18:47:27,280 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 160 transitions. Word has length 26 [2024-09-15 18:47:27,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:27,280 INFO L474 AbstractCegarLoop]: Abstraction has 121 states and 160 transitions. [2024-09-15 18:47:27,280 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 states have internal predecessors, (41), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:27,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:27,281 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 160 transitions. [2024-09-15 18:47:27,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 18:47:27,281 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:27,281 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:27,294 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:27,482 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-15 18:47:27,482 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:27,482 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:27,482 INFO L85 PathProgramCache]: Analyzing trace with hash -581854573, now seen corresponding path program 10 times [2024-09-15 18:47:27,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:27,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911840864] [2024-09-15 18:47:27,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:27,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:27,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:27,658 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:27,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:27,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911840864] [2024-09-15 18:47:27,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911840864] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:27,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977562080] [2024-09-15 18:47:27,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:27,661 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:27,661 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:27,662 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) [2024-09-15 18:47:27,665 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-15 18:47:27,707 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:27,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:27,714 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-15 18:47:27,715 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:27,825 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:47:28,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977562080] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:28,044 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:28,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 12] total 28 [2024-09-15 18:47:28,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466047504] [2024-09-15 18:47:28,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:28,045 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-15 18:47:28,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:28,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-15 18:47:28,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2024-09-15 18:47:28,046 INFO L87 Difference]: Start difference. First operand 121 states and 160 transitions. Second operand has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:28,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:28,546 INFO L93 Difference]: Finished difference Result 207 states and 262 transitions. [2024-09-15 18:47:28,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-09-15 18:47:28,546 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-15 18:47:28,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:28,547 INFO L225 Difference]: With dead ends: 207 [2024-09-15 18:47:28,547 INFO L226 Difference]: Without dead ends: 157 [2024-09-15 18:47:28,548 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=186, Invalid=936, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:47:28,548 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 13 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 418 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 418 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:28,549 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [13 Valid, 145 Invalid, 437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 418 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:28,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-09-15 18:47:28,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 135. [2024-09-15 18:47:28,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.323076923076923) internal successors, (172), 130 states have internal predecessors, (172), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:28,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 176 transitions. [2024-09-15 18:47:28,618 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 176 transitions. Word has length 27 [2024-09-15 18:47:28,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:28,619 INFO L474 AbstractCegarLoop]: Abstraction has 135 states and 176 transitions. [2024-09-15 18:47:28,619 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:28,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,619 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 176 transitions. [2024-09-15 18:47:28,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:47:28,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:28,620 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:28,633 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-15 18:47:28,820 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-15 18:47:28,820 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:28,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1321611814, now seen corresponding path program 11 times [2024-09-15 18:47:28,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:28,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774638784] [2024-09-15 18:47:28,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:28,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:28,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:29,470 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:29,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:29,473 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:29,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774638784] [2024-09-15 18:47:29,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774638784] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115552069] [2024-09-15 18:47:29,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:29,476 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) [2024-09-15 18:47:29,477 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-15 18:47:29,558 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:47:29,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:29,560 INFO L262 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-15 18:47:29,564 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:30,064 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:30,998 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:30,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115552069] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:30,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:30,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22, 22] total 47 [2024-09-15 18:47:30,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16219506] [2024-09-15 18:47:30,999 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:30,999 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-15 18:47:30,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:31,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-15 18:47:31,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=1943, Unknown=0, NotChecked=0, Total=2162 [2024-09-15 18:47:31,000 INFO L87 Difference]: Start difference. First operand 135 states and 176 transitions. Second operand has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:35,175 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:47:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:37,849 INFO L93 Difference]: Finished difference Result 209 states and 255 transitions. [2024-09-15 18:47:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2024-09-15 18:47:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-15 18:47:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:37,851 INFO L225 Difference]: With dead ends: 209 [2024-09-15 18:47:37,851 INFO L226 Difference]: Without dead ends: 177 [2024-09-15 18:47:37,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 30 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 931 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2024-09-15 18:47:37,853 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 642 mSolverCounterSat, 35 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 678 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 642 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:37,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 167 Invalid, 678 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 642 Invalid, 1 Unknown, 0 Unchecked, 4.5s Time] [2024-09-15 18:47:37,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-15 18:47:37,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 123. [2024-09-15 18:47:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.3305084745762712) internal successors, (157), 118 states have internal predecessors, (157), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 161 transitions. [2024-09-15 18:47:37,927 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 161 transitions. Word has length 28 [2024-09-15 18:47:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:37,927 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 161 transitions. [2024-09-15 18:47:37,928 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 45 states have internal predecessors, (60), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,928 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 161 transitions. [2024-09-15 18:47:37,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2024-09-15 18:47:37,929 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:37,929 INFO L216 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:37,942 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-15 18:47:38,132 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-15 18:47:38,133 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:38,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash -1915414158, now seen corresponding path program 12 times [2024-09-15 18:47:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370202241] [2024-09-15 18:47:38,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:38,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:38,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:38,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:38,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:38,415 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:38,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:38,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370202241] [2024-09-15 18:47:38,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370202241] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:38,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236703381] [2024-09-15 18:47:38,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:38,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:38,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:38,417 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) [2024-09-15 18:47:38,419 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-15 18:47:38,538 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2024-09-15 18:47:38,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:38,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:47:38,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:38,574 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:38,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:39,018 INFO L134 CoverageAnalysis]: Checked inductivity of 107 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:39,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236703381] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:39,019 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:39,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-15 18:47:39,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145535214] [2024-09-15 18:47:39,019 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:39,019 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 18:47:39,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:39,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 18:47:39,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 18:47:39,021 INFO L87 Difference]: Start difference. First operand 123 states and 161 transitions. Second operand has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2024-09-15 18:47:53,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:53,098 INFO L93 Difference]: Finished difference Result 454 states and 600 transitions. [2024-09-15 18:47:53,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2024-09-15 18:47:53,098 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2024-09-15 18:47:53,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:53,100 INFO L225 Difference]: With dead ends: 454 [2024-09-15 18:47:53,100 INFO L226 Difference]: Without dead ends: 436 [2024-09-15 18:47:53,104 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8327 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=6168, Invalid=16182, Unknown=0, NotChecked=0, Total=22350 [2024-09-15 18:47:53,105 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 1175 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 959 mSolverCounterSat, 546 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1175 SdHoareTripleChecker+Valid, 463 SdHoareTripleChecker+Invalid, 1505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 546 IncrementalHoareTripleChecker+Valid, 959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:53,105 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1175 Valid, 463 Invalid, 1505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [546 Valid, 959 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2024-09-15 18:47:53,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2024-09-15 18:47:53,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 136. [2024-09-15 18:47:53,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.3282442748091603) internal successors, (174), 131 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:53,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 178 transitions. [2024-09-15 18:47:53,196 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 178 transitions. Word has length 29 [2024-09-15 18:47:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:53,197 INFO L474 AbstractCegarLoop]: Abstraction has 136 states and 178 transitions. [2024-09-15 18:47:53,197 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2432432432432432) internal successors, (46), 37 states have internal predecessors, (46), 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) [2024-09-15 18:47:53,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 178 transitions. [2024-09-15 18:47:53,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:47:53,198 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:53,198 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:53,211 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:53,398 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-15 18:47:53,398 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:53,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:53,399 INFO L85 PathProgramCache]: Analyzing trace with hash -2031107082, now seen corresponding path program 13 times [2024-09-15 18:47:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:53,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149932351] [2024-09-15 18:47:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:53,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:53,599 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:53,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:47:53,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149932351] [2024-09-15 18:47:53,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149932351] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:53,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [98441569] [2024-09-15 18:47:53,602 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:53,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:53,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:53,604 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) [2024-09-15 18:47:53,605 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-15 18:47:53,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:53,650 INFO L262 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-15 18:47:53,651 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:53,778 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:47:53,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:54,144 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:47:54,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [98441569] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:54,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:54,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 14] total 33 [2024-09-15 18:47:54,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896160750] [2024-09-15 18:47:54,145 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:54,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:47:54,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:54,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:47:54,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=895, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:47:54,148 INFO L87 Difference]: Start difference. First operand 136 states and 178 transitions. Second operand has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2024-09-15 18:47:54,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:54,984 INFO L93 Difference]: Finished difference Result 240 states and 301 transitions. [2024-09-15 18:47:54,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 18:47:54,985 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-15 18:47:54,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:54,986 INFO L225 Difference]: With dead ends: 240 [2024-09-15 18:47:54,986 INFO L226 Difference]: Without dead ends: 177 [2024-09-15 18:47:54,986 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=1318, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:47:54,987 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 15 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 421 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 421 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:54,987 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 127 Invalid, 449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 421 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:54,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-15 18:47:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 152. [2024-09-15 18:47:55,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.3061224489795917) internal successors, (192), 147 states have internal predecessors, (192), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 196 transitions. [2024-09-15 18:47:55,101 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 196 transitions. Word has length 30 [2024-09-15 18:47:55,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:55,101 INFO L474 AbstractCegarLoop]: Abstraction has 152 states and 196 transitions. [2024-09-15 18:47:55,101 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.3333333333333333) internal successors, (44), 33 states have internal predecessors, (44), 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) [2024-09-15 18:47:55,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:55,102 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 196 transitions. [2024-09-15 18:47:55,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:47:55,102 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:55,102 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:55,118 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:55,306 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:55,307 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:55,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:55,307 INFO L85 PathProgramCache]: Analyzing trace with hash -769153695, now seen corresponding path program 14 times [2024-09-15 18:47:55,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:55,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779643132] [2024-09-15 18:47:55,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:55,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:55,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:56,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:56,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:56,173 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:56,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779643132] [2024-09-15 18:47:56,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779643132] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:56,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [422632466] [2024-09-15 18:47:56,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:56,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:56,174 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:56,175 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) [2024-09-15 18:47:56,176 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-15 18:47:56,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:56,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:56,260 WARN L260 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 70 conjuncts are in the unsatisfiable core [2024-09-15 18:47:56,261 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:57,030 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:57,030 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:57,951 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:57,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [422632466] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:57,951 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:57,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 24, 20] total 48 [2024-09-15 18:47:57,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682671108] [2024-09-15 18:47:57,951 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:57,951 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2024-09-15 18:47:57,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:57,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2024-09-15 18:47:57,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=2012, Unknown=0, NotChecked=0, Total=2256 [2024-09-15 18:47:57,952 INFO L87 Difference]: Start difference. First operand 152 states and 196 transitions. Second operand has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:02,140 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:07,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:07,083 INFO L93 Difference]: Finished difference Result 250 states and 300 transitions. [2024-09-15 18:48:07,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2024-09-15 18:48:07,083 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-15 18:48:07,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:07,085 INFO L225 Difference]: With dead ends: 250 [2024-09-15 18:48:07,085 INFO L226 Difference]: Without dead ends: 214 [2024-09-15 18:48:07,085 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1113 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=662, Invalid=5190, Unknown=0, NotChecked=0, Total=5852 [2024-09-15 18:48:07,086 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 796 mSolverCounterSat, 63 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 796 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:07,086 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 162 Invalid, 860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 796 Invalid, 1 Unknown, 0 Unchecked, 4.8s Time] [2024-09-15 18:48:07,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2024-09-15 18:48:07,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 138. [2024-09-15 18:48:07,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.3157894736842106) internal successors, (175), 133 states have internal predecessors, (175), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:07,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 179 transitions. [2024-09-15 18:48:07,177 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 179 transitions. Word has length 31 [2024-09-15 18:48:07,177 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:07,177 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 179 transitions. [2024-09-15 18:48:07,178 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.3541666666666667) internal successors, (65), 46 states have internal predecessors, (65), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:07,178 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:07,178 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 179 transitions. [2024-09-15 18:48:07,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-09-15 18:48:07,178 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:07,178 INFO L216 NwaCegarLoop]: trace histogram [15, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:07,193 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:07,379 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:07,379 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:07,379 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:07,379 INFO L85 PathProgramCache]: Analyzing trace with hash 520374677, now seen corresponding path program 15 times [2024-09-15 18:48:07,379 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:07,379 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490760335] [2024-09-15 18:48:07,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:07,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:07,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:07,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:07,683 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:48:07,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490760335] [2024-09-15 18:48:07,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490760335] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:07,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674295117] [2024-09-15 18:48:07,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:48:07,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:07,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:07,685 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) [2024-09-15 18:48:07,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-15 18:48:07,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2024-09-15 18:48:07,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:07,799 INFO L262 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:48:07,800 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:07,838 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:48:07,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:08,340 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:48:08,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674295117] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:08,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:08,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-15 18:48:08,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621914643] [2024-09-15 18:48:08,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:08,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-15 18:48:08,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:08,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-15 18:48:08,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 18:48:08,342 INFO L87 Difference]: Start difference. First operand 138 states and 179 transitions. Second operand has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:34,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:34,303 INFO L93 Difference]: Finished difference Result 547 states and 705 transitions. [2024-09-15 18:48:34,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2024-09-15 18:48:34,304 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2024-09-15 18:48:34,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:34,306 INFO L225 Difference]: With dead ends: 547 [2024-09-15 18:48:34,306 INFO L226 Difference]: Without dead ends: 532 [2024-09-15 18:48:34,310 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17341 ImplicationChecksByTransitivity, 23.1s TimeCoverageRelationStatistics Valid=10628, Invalid=33262, Unknown=0, NotChecked=0, Total=43890 [2024-09-15 18:48:34,311 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 1583 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1192 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1583 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 1192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:34,311 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1583 Valid, 523 Invalid, 1989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 1192 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-15 18:48:34,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2024-09-15 18:48:34,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 153. [2024-09-15 18:48:34,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 148 states have (on average 1.3175675675675675) internal successors, (195), 148 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:34,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 199 transitions. [2024-09-15 18:48:34,432 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 199 transitions. Word has length 32 [2024-09-15 18:48:34,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:34,432 INFO L474 AbstractCegarLoop]: Abstraction has 153 states and 199 transitions. [2024-09-15 18:48:34,432 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2195121951219512) internal successors, (50), 41 states have internal predecessors, (50), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:34,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:34,433 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 199 transitions. [2024-09-15 18:48:34,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 18:48:34,434 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:34,434 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:34,450 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:34,634 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-15 18:48:34,634 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:34,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:34,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1853204403, now seen corresponding path program 16 times [2024-09-15 18:48:34,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:34,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025558835] [2024-09-15 18:48:34,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:34,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:34,867 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:48:34,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025558835] [2024-09-15 18:48:34,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025558835] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:34,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115816647] [2024-09-15 18:48:34,870 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:48:34,870 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:34,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:34,872 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) [2024-09-15 18:48:34,873 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-15 18:48:34,925 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:48:34,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:34,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-09-15 18:48:34,930 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:35,065 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:48:35,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:35,408 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:48:35,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115816647] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:35,408 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:35,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 16] total 38 [2024-09-15 18:48:35,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302749276] [2024-09-15 18:48:35,408 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:35,408 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-15 18:48:35,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:35,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-15 18:48:35,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=1205, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:48:35,409 INFO L87 Difference]: Start difference. First operand 153 states and 199 transitions. Second operand has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2024-09-15 18:48:36,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:36,401 INFO L93 Difference]: Finished difference Result 269 states and 336 transitions. [2024-09-15 18:48:36,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-09-15 18:48:36,402 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-15 18:48:36,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:36,403 INFO L225 Difference]: With dead ends: 269 [2024-09-15 18:48:36,403 INFO L226 Difference]: Without dead ends: 198 [2024-09-15 18:48:36,404 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=305, Invalid=1765, Unknown=0, NotChecked=0, Total=2070 [2024-09-15 18:48:36,405 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 17 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 709 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 739 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:36,405 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 190 Invalid, 739 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 709 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:48:36,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2024-09-15 18:48:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 170. [2024-09-15 18:48:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.2969696969696969) internal successors, (214), 165 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:36,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 218 transitions. [2024-09-15 18:48:36,549 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 218 transitions. Word has length 33 [2024-09-15 18:48:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:36,549 INFO L474 AbstractCegarLoop]: Abstraction has 170 states and 218 transitions. [2024-09-15 18:48:36,549 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.2894736842105263) internal successors, (49), 38 states have internal predecessors, (49), 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) [2024-09-15 18:48:36,549 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:36,549 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 218 transitions. [2024-09-15 18:48:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 18:48:36,550 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:36,550 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:36,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:36,750 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-15 18:48:36,751 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:36,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash 158453958, now seen corresponding path program 17 times [2024-09-15 18:48:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [246841510] [2024-09-15 18:48:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:36,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:37,574 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:37,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:37,577 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:37,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [246841510] [2024-09-15 18:48:37,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [246841510] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:37,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988947803] [2024-09-15 18:48:37,577 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:48:37,577 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:37,577 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:37,579 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) [2024-09-15 18:48:37,581 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-15 18:48:37,671 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-09-15 18:48:37,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:37,673 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 74 conjuncts are in the unsatisfiable core [2024-09-15 18:48:37,674 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:38,436 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:38,437 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:40,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988947803] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:40,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:40,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 28, 28] total 63 [2024-09-15 18:48:40,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115975350] [2024-09-15 18:48:40,030 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:40,031 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2024-09-15 18:48:40,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2024-09-15 18:48:40,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=3573, Unknown=0, NotChecked=0, Total=3906 [2024-09-15 18:48:40,032 INFO L87 Difference]: Start difference. First operand 170 states and 218 transitions. Second operand has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:44,280 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:51,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:51,266 INFO L93 Difference]: Finished difference Result 280 states and 335 transitions. [2024-09-15 18:48:51,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2024-09-15 18:48:51,267 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-15 18:48:51,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:51,268 INFO L225 Difference]: With dead ends: 280 [2024-09-15 18:48:51,269 INFO L226 Difference]: Without dead ends: 240 [2024-09-15 18:48:51,269 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1690 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=787, Invalid=7585, Unknown=0, NotChecked=0, Total=8372 [2024-09-15 18:48:51,270 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 1051 mSolverCounterSat, 61 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 1113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 1051 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:51,270 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 221 Invalid, 1113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 1051 Invalid, 1 Unknown, 0 Unchecked, 5.0s Time] [2024-09-15 18:48:51,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2024-09-15 18:48:51,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2024-09-15 18:48:51,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.308724832214765) internal successors, (195), 149 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:51,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2024-09-15 18:48:51,409 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 34 [2024-09-15 18:48:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:51,409 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2024-09-15 18:48:51,409 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.2380952380952381) internal successors, (78), 61 states have internal predecessors, (78), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:51,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:51,410 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2024-09-15 18:48:51,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:48:51,410 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:51,410 INFO L216 NwaCegarLoop]: trace histogram [16, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:51,427 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-15 18:48:51,611 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-09-15 18:48:51,611 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:51,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:51,611 INFO L85 PathProgramCache]: Analyzing trace with hash -731705582, now seen corresponding path program 18 times [2024-09-15 18:48:51,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:51,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756791371] [2024-09-15 18:48:51,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:51,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:51,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:51,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:51,995 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:48:51,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:51,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756791371] [2024-09-15 18:48:51,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756791371] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:51,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253863178] [2024-09-15 18:48:51,996 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:48:51,996 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:51,996 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:51,998 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) [2024-09-15 18:48:52,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process