./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de41.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-de41.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 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 --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 18:46:58,983 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-15 18:46:59,046 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-15 18:46:59,051 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-15 18:46:59,051 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-15 18:46:59,076 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-15 18:46:59,076 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-15 18:46:59,077 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-15 18:46:59,077 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-15 18:46:59,077 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-15 18:46:59,078 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-15 18:46:59,078 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-15 18:46:59,078 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-15 18:46:59,079 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-15 18:46:59,079 INFO L153 SettingsManager]: * Use SBE=true [2024-09-15 18:46:59,079 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-15 18:46:59,080 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-15 18:46:59,080 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-15 18:46:59,080 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-15 18:46:59,080 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-15 18:46:59,081 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-15 18:46:59,081 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-15 18:46:59,081 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-15 18:46:59,081 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-15 18:46:59,082 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-15 18:46:59,082 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-15 18:46:59,082 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-15 18:46:59,082 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-15 18:46:59,083 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-15 18:46:59,083 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-15 18:46:59,083 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-15 18:46:59,083 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-15 18:46:59,083 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:46:59,084 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-15 18:46:59,084 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-15 18:46:59,084 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-15 18:46:59,084 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-15 18:46:59,085 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-15 18:46:59,085 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-15 18:46:59,085 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-15 18:46:59,085 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-15 18:46:59,089 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-15 18:46:59,089 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71e52c2f7da6d5380080fb621ed04f7c322fd22e434b0426cf7577ab025ae680 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-15 18:46:59,331 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-15 18:46:59,346 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-15 18:46:59,349 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-15 18:46:59,349 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-15 18:46:59,350 INFO L274 PluginConnector]: CDTParser initialized [2024-09-15 18:46:59,351 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de41.c [2024-09-15 18:47:00,708 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-15 18:47:00,888 INFO L384 CDTParser]: Found 1 translation units. [2024-09-15 18:47:00,888 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de41.c [2024-09-15 18:47:00,900 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/98c945c0b/f2a523e26ef947dc90cbdeab735fed72/FLAGd05ab2355 [2024-09-15 18:47:00,912 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/98c945c0b/f2a523e26ef947dc90cbdeab735fed72 [2024-09-15 18:47:00,914 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-15 18:47:00,916 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-15 18:47:00,917 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-15 18:47:00,918 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-15 18:47:00,924 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-15 18:47:00,925 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:47:00" (1/1) ... [2024-09-15 18:47:00,925 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@df903a5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:00, skipping insertion in model container [2024-09-15 18:47:00,926 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.09 06:47:00" (1/1) ... [2024-09-15 18:47:00,940 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-15 18:47:01,053 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-de41.c[368,381] [2024-09-15 18:47:01,067 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:47:01,077 INFO L200 MainTranslator]: Completed pre-run [2024-09-15 18:47:01,085 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-de41.c[368,381] [2024-09-15 18:47:01,089 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-15 18:47:01,101 INFO L204 MainTranslator]: Completed translation [2024-09-15 18:47:01,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01 WrapperNode [2024-09-15 18:47:01,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-15 18:47:01,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-15 18:47:01,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-15 18:47:01,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-15 18:47:01,108 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,111 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,117 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-15 18:47:01,117 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-15 18:47:01,118 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-15 18:47:01,118 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-15 18:47:01,118 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-15 18:47:01,125 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,125 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,126 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,137 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 18:47:01,137 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,137 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,139 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,142 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,143 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,146 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-15 18:47:01,147 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-15 18:47:01,148 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-15 18:47:01,148 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-15 18:47:01,148 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (1/1) ... [2024-09-15 18:47:01,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-15 18:47:01,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:01,175 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 18:47:01,179 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 18:47:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-15 18:47:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-15 18:47:01,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-15 18:47:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-15 18:47:01,219 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-15 18:47:01,219 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-15 18:47:01,219 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-15 18:47:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-15 18:47:01,220 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-15 18:47:01,221 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-15 18:47:01,276 INFO L242 CfgBuilder]: Building ICFG [2024-09-15 18:47:01,278 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-15 18:47:01,440 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-15 18:47:01,440 INFO L291 CfgBuilder]: Performing block encoding [2024-09-15 18:47:01,463 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-15 18:47:01,463 INFO L318 CfgBuilder]: Removed 4 assume(true) statements. [2024-09-15 18:47:01,463 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:47:01 BoogieIcfgContainer [2024-09-15 18:47:01,463 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-15 18:47:01,465 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-15 18:47:01,465 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-15 18:47:01,467 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-15 18:47:01,468 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.09 06:47:00" (1/3) ... [2024-09-15 18:47:01,468 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749ff9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:47:01, skipping insertion in model container [2024-09-15 18:47:01,469 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.09 06:47:01" (2/3) ... [2024-09-15 18:47:01,469 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@749ff9e6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.09 06:47:01, skipping insertion in model container [2024-09-15 18:47:01,470 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.09 06:47:01" (3/3) ... [2024-09-15 18:47:01,471 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de41.c [2024-09-15 18:47:01,483 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-15 18:47:01,483 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-15 18:47:01,528 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-15 18:47:01,532 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;@20a835a4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-15 18:47:01,534 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-15 18:47:01,537 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 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 18:47:01,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:47:01,542 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:01,542 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:01,542 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:01,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:01,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1769832604, now seen corresponding path program 1 times [2024-09-15 18:47:01,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:01,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466782089] [2024-09-15 18:47:01,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:01,554 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:01,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:01,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:01,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:01,678 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 18:47:01,678 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:01,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466782089] [2024-09-15 18:47:01,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466782089] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:01,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:01,680 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-15 18:47:01,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074191609] [2024-09-15 18:47:01,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:01,684 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-15 18:47:01,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-15 18:47:01,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-15 18:47:01,703 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 14 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:47:01,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:01,725 INFO L93 Difference]: Finished difference Result 36 states and 51 transitions. [2024-09-15 18:47:01,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-15 18:47:01,727 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:47:01,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:01,731 INFO L225 Difference]: With dead ends: 36 [2024-09-15 18:47:01,731 INFO L226 Difference]: Without dead ends: 15 [2024-09-15 18:47:01,733 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 18:47:01,738 INFO L434 NwaCegarLoop]: 22 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, 22 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 18:47:01,739 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 22 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:01,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2024-09-15 18:47:01,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2024-09-15 18:47:01,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.4) internal successors, (14), 10 states have internal predecessors, (14), 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 18:47:01,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 18 transitions. [2024-09-15 18:47:01,763 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 18 transitions. Word has length 14 [2024-09-15 18:47:01,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:01,764 INFO L474 AbstractCegarLoop]: Abstraction has 15 states and 18 transitions. [2024-09-15 18:47:01,764 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.0) internal successors, (10), 2 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 18:47:01,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:01,765 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 18 transitions. [2024-09-15 18:47:01,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2024-09-15 18:47:01,765 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:01,766 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:01,766 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-15 18:47:01,766 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:01,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:01,767 INFO L85 PathProgramCache]: Analyzing trace with hash 406021780, now seen corresponding path program 1 times [2024-09-15 18:47:01,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:01,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779335871] [2024-09-15 18:47:01,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:01,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:01,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,183 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:02,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,197 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 18:47:02,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:02,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779335871] [2024-09-15 18:47:02,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779335871] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:02,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:02,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-09-15 18:47:02,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194099906] [2024-09-15 18:47:02,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:02,198 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-09-15 18:47:02,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:02,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-09-15 18:47:02,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:47:02,199 INFO L87 Difference]: Start difference. First operand 15 states and 18 transitions. Second operand has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 18:47:02,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:02,295 INFO L93 Difference]: Finished difference Result 33 states and 44 transitions. [2024-09-15 18:47:02,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:47:02,296 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 18:47:02,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:02,297 INFO L225 Difference]: With dead ends: 33 [2024-09-15 18:47:02,297 INFO L226 Difference]: Without dead ends: 21 [2024-09-15 18:47:02,298 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-09-15 18:47:02,299 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 6 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:02,300 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 49 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:02,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-15 18:47:02,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-15 18:47:02,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:02,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2024-09-15 18:47:02,308 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 14 [2024-09-15 18:47:02,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:02,309 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2024-09-15 18:47:02,309 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 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 18:47:02,310 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:02,311 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2024-09-15 18:47:02,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-15 18:47:02,312 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:02,312 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:02,312 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-15 18:47:02,312 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:02,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:02,313 INFO L85 PathProgramCache]: Analyzing trace with hash 739520928, now seen corresponding path program 1 times [2024-09-15 18:47:02,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:02,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145113030] [2024-09-15 18:47:02,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:02,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,385 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:02,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,389 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 18:47:02,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:02,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145113030] [2024-09-15 18:47:02,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145113030] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:02,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502869625] [2024-09-15 18:47:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:02,390 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:02,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:02,392 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 18:47:02,399 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 18:47:02,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,436 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-15 18:47:02,440 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:02,471 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 18:47:02,472 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:02,570 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 18:47:02,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502869625] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:02,570 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:02,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-15 18:47:02,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064633794] [2024-09-15 18:47:02,570 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:02,571 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-15 18:47:02,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:02,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-15 18:47:02,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-15 18:47:02,572 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 18:47:02,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:02,717 INFO L93 Difference]: Finished difference Result 55 states and 80 transitions. [2024-09-15 18:47:02,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-15 18:47:02,718 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2024-09-15 18:47:02,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:02,720 INFO L225 Difference]: With dead ends: 55 [2024-09-15 18:47:02,720 INFO L226 Difference]: Without dead ends: 48 [2024-09-15 18:47:02,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 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 18:47:02,721 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:02,722 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 69 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-15 18:47:02,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 33. [2024-09-15 18:47:02,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 28 states have (on average 1.3928571428571428) internal successors, (39), 28 states have internal predecessors, (39), 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 18:47:02,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 43 transitions. [2024-09-15 18:47:02,730 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 43 transitions. Word has length 15 [2024-09-15 18:47:02,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:02,730 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 43 transitions. [2024-09-15 18:47:02,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 18:47:02,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:02,731 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 43 transitions. [2024-09-15 18:47:02,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-15 18:47:02,732 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:02,732 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:02,757 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:02,936 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:02,937 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:02,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:02,938 INFO L85 PathProgramCache]: Analyzing trace with hash 518483476, now seen corresponding path program 1 times [2024-09-15 18:47:02,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:02,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194044617] [2024-09-15 18:47:02,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:02,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:02,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:02,999 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:02,999 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:02,999 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194044617] [2024-09-15 18:47:02,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194044617] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-15 18:47:02,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-15 18:47:03,000 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-15 18:47:03,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862739504] [2024-09-15 18:47:03,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-15 18:47:03,000 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-15 18:47:03,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:03,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-15 18:47:03,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-15 18:47:03,001 INFO L87 Difference]: Start difference. First operand 33 states and 43 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:03,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:03,020 INFO L93 Difference]: Finished difference Result 39 states and 49 transitions. [2024-09-15 18:47:03,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-15 18:47:03,021 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2024-09-15 18:47:03,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:03,033 INFO L225 Difference]: With dead ends: 39 [2024-09-15 18:47:03,033 INFO L226 Difference]: Without dead ends: 28 [2024-09-15 18:47:03,033 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:03,034 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 1 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:03,034 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 37 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:03,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2024-09-15 18:47:03,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2024-09-15 18:47:03,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 states have internal predecessors, (32), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:03,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 36 transitions. [2024-09-15 18:47:03,042 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 36 transitions. Word has length 16 [2024-09-15 18:47:03,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:03,042 INFO L474 AbstractCegarLoop]: Abstraction has 28 states and 36 transitions. [2024-09-15 18:47:03,042 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:03,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:03,043 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 36 transitions. [2024-09-15 18:47:03,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-15 18:47:03,046 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:03,046 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:03,047 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-15 18:47:03,047 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:03,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:03,047 INFO L85 PathProgramCache]: Analyzing trace with hash 291445903, now seen corresponding path program 1 times [2024-09-15 18:47:03,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:03,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777173824] [2024-09-15 18:47:03,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:03,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,103 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:03,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:03,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777173824] [2024-09-15 18:47:03,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777173824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:03,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000884615] [2024-09-15 18:47:03,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:03,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:03,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:03,108 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 18:47:03,115 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 18:47:03,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,146 INFO L262 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-09-15 18:47:03,146 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:03,180 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:03,181 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:03,201 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:03,201 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000884615] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:03,201 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:03,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 6 [2024-09-15 18:47:03,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050805686] [2024-09-15 18:47:03,202 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:03,202 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:47:03,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:03,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:47:03,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:03,203 INFO L87 Difference]: Start difference. First operand 28 states and 36 transitions. Second operand has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 18:47:03,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:03,242 INFO L93 Difference]: Finished difference Result 62 states and 89 transitions. [2024-09-15 18:47:03,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:47:03,243 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 18:47:03,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:03,243 INFO L225 Difference]: With dead ends: 62 [2024-09-15 18:47:03,243 INFO L226 Difference]: Without dead ends: 56 [2024-09-15 18:47:03,244 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:47:03,244 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 9 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:03,245 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 43 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:03,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-15 18:47:03,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 50. [2024-09-15 18:47:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.488888888888889) internal successors, (67), 45 states have internal predecessors, (67), 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 18:47:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 71 transitions. [2024-09-15 18:47:03,261 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 71 transitions. Word has length 17 [2024-09-15 18:47:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:03,261 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 71 transitions. [2024-09-15 18:47:03,261 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.6666666666666665) internal successors, (22), 6 states have internal predecessors, (22), 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 18:47:03,262 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:03,262 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 71 transitions. [2024-09-15 18:47:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 18:47:03,263 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:03,263 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:03,276 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 18:47:03,463 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 18:47:03,464 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:03,464 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:03,464 INFO L85 PathProgramCache]: Analyzing trace with hash 480426180, now seen corresponding path program 1 times [2024-09-15 18:47:03,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:03,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759104748] [2024-09-15 18:47:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:03,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:03,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:03,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,750 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:03,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759104748] [2024-09-15 18:47:03,752 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759104748] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:03,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1064072558] [2024-09-15 18:47:03,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:03,752 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:03,752 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:03,754 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 18:47:03,755 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 18:47:03,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:03,795 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-15 18:47:03,796 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:03,919 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:03,919 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:04,022 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:04,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1064072558] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:04,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:04,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 8] total 17 [2024-09-15 18:47:04,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800968093] [2024-09-15 18:47:04,023 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:04,023 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:47:04,023 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:04,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:47:04,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:47:04,024 INFO L87 Difference]: Start difference. First operand 50 states and 71 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 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 18:47:04,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:04,322 INFO L93 Difference]: Finished difference Result 82 states and 114 transitions. [2024-09-15 18:47:04,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-15 18:47:04,322 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 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 18 [2024-09-15 18:47:04,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:04,323 INFO L225 Difference]: With dead ends: 82 [2024-09-15 18:47:04,323 INFO L226 Difference]: Without dead ends: 70 [2024-09-15 18:47:04,324 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=91, Invalid=371, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:47:04,324 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:04,324 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [16 Valid, 75 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:04,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2024-09-15 18:47:04,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 53. [2024-09-15 18:47:04,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 48 states have (on average 1.5) internal successors, (72), 48 states have internal predecessors, (72), 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 18:47:04,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 76 transitions. [2024-09-15 18:47:04,337 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 76 transitions. Word has length 18 [2024-09-15 18:47:04,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:04,337 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 76 transitions. [2024-09-15 18:47:04,337 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 15 states have internal predecessors, (34), 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 18:47:04,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:04,337 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 76 transitions. [2024-09-15 18:47:04,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2024-09-15 18:47:04,338 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:04,338 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:04,354 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 18:47:04,542 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 18:47:04,543 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:04,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:04,543 INFO L85 PathProgramCache]: Analyzing trace with hash 1871956372, now seen corresponding path program 2 times [2024-09-15 18:47:04,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:04,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679157554] [2024-09-15 18:47:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:04,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:04,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:04,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:04,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:04,611 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 18:47:04,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679157554] [2024-09-15 18:47:04,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679157554] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:04,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610379301] [2024-09-15 18:47:04,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:04,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:04,616 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 18:47:04,617 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 18:47:04,646 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:04,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:04,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-15 18:47:04,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:04,665 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 18:47:04,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:04,741 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 18:47:04,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610379301] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:04,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:04,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-15 18:47:04,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632323572] [2024-09-15 18:47:04,742 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:04,743 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-15 18:47:04,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:04,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-15 18:47:04,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-15 18:47:04,745 INFO L87 Difference]: Start difference. First operand 53 states and 76 transitions. Second operand has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 18:47:05,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:05,221 INFO L93 Difference]: Finished difference Result 192 states and 316 transitions. [2024-09-15 18:47:05,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-15 18:47:05,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 18:47:05,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:05,223 INFO L225 Difference]: With dead ends: 192 [2024-09-15 18:47:05,223 INFO L226 Difference]: Without dead ends: 177 [2024-09-15 18:47:05,224 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:47:05,224 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 174 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 281 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:05,225 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [174 Valid, 196 Invalid, 281 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:05,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2024-09-15 18:47:05,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 88. [2024-09-15 18:47:05,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.4698795180722892) internal successors, (122), 83 states have internal predecessors, (122), 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 18:47:05,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 126 transitions. [2024-09-15 18:47:05,246 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 126 transitions. Word has length 18 [2024-09-15 18:47:05,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:05,246 INFO L474 AbstractCegarLoop]: Abstraction has 88 states and 126 transitions. [2024-09-15 18:47:05,246 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6) internal successors, (24), 15 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 18:47:05,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:05,247 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 126 transitions. [2024-09-15 18:47:05,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-15 18:47:05,247 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:05,247 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:05,261 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 18:47:05,451 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 18:47:05,451 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:05,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:05,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1724400578, now seen corresponding path program 2 times [2024-09-15 18:47:05,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:05,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56779505] [2024-09-15 18:47:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:05,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:05,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:05,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:05,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:05,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:05,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56779505] [2024-09-15 18:47:05,514 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56779505] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:05,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426002690] [2024-09-15 18:47:05,514 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:05,515 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:05,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:05,516 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 18:47:05,517 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 18:47:05,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:05,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:05,548 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-15 18:47:05,549 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:05,573 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:05,574 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:05,631 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:05,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [426002690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:05,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:05,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 12 [2024-09-15 18:47:05,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22286197] [2024-09-15 18:47:05,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:05,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:47:05,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:05,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:47:05,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:47:05,633 INFO L87 Difference]: Start difference. First operand 88 states and 126 transitions. Second operand has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 18:47:05,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:05,877 INFO L93 Difference]: Finished difference Result 145 states and 199 transitions. [2024-09-15 18:47:05,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-15 18:47:05,878 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 20 [2024-09-15 18:47:05,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:05,878 INFO L225 Difference]: With dead ends: 145 [2024-09-15 18:47:05,879 INFO L226 Difference]: Without dead ends: 117 [2024-09-15 18:47:05,879 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:47:05,880 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 124 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 124 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:05,880 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 150 Invalid, 140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 124 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:05,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2024-09-15 18:47:05,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 76. [2024-09-15 18:47:05,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.4507042253521127) internal successors, (103), 71 states have internal predecessors, (103), 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 18:47:05,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 107 transitions. [2024-09-15 18:47:05,906 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 107 transitions. Word has length 20 [2024-09-15 18:47:05,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:05,906 INFO L474 AbstractCegarLoop]: Abstraction has 76 states and 107 transitions. [2024-09-15 18:47:05,906 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0) internal successors, (24), 12 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 18:47:05,906 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:05,907 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 107 transitions. [2024-09-15 18:47:05,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-15 18:47:05,907 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:05,907 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:05,922 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 18:47:06,108 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 18:47:06,108 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:06,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:06,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1048636735, now seen corresponding path program 3 times [2024-09-15 18:47:06,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:06,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805178693] [2024-09-15 18:47:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:06,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:06,166 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:06,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:06,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805178693] [2024-09-15 18:47:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805178693] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650681036] [2024-09-15 18:47:06,169 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:06,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:06,169 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:06,170 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 18:47:06,172 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 18:47:06,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-15 18:47:06,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:06,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-15 18:47:06,202 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:06,223 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:06,223 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:06,255 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:06,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [650681036] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:06,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:06,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-15 18:47:06,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85225354] [2024-09-15 18:47:06,256 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:06,256 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:47:06,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:06,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:47:06,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:06,257 INFO L87 Difference]: Start difference. First operand 76 states and 107 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 18:47:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:06,307 INFO L93 Difference]: Finished difference Result 92 states and 125 transitions. [2024-09-15 18:47:06,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-15 18:47:06,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 18:47:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:06,308 INFO L225 Difference]: With dead ends: 92 [2024-09-15 18:47:06,308 INFO L226 Difference]: Without dead ends: 87 [2024-09-15 18:47:06,309 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 40 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-15 18:47:06,309 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 7 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:06,309 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 57 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:06,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-15 18:47:06,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2024-09-15 18:47:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 79 states have (on average 1.4177215189873418) internal successors, (112), 79 states have internal predecessors, (112), 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 18:47:06,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 116 transitions. [2024-09-15 18:47:06,329 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 116 transitions. Word has length 21 [2024-09-15 18:47:06,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:06,330 INFO L474 AbstractCegarLoop]: Abstraction has 84 states and 116 transitions. [2024-09-15 18:47:06,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 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 18:47:06,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:06,330 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 116 transitions. [2024-09-15 18:47:06,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:47:06,331 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:06,331 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:06,344 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 18:47:06,534 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 18:47:06,535 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:06,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:06,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1816461804, now seen corresponding path program 4 times [2024-09-15 18:47:06,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:06,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944801480] [2024-09-15 18:47:06,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:06,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:06,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:06,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:06,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944801480] [2024-09-15 18:47:06,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944801480] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:06,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423692276] [2024-09-15 18:47:06,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:06,835 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:06,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:06,837 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 18:47:06,841 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 18:47:06,903 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:06,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:47:06,909 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:07,155 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:07,155 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:07,363 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-15 18:47:07,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423692276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:07,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:07,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13, 12] total 24 [2024-09-15 18:47:07,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706429903] [2024-09-15 18:47:07,364 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:07,364 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:47:07,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:07,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:47:07,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:47:07,365 INFO L87 Difference]: Start difference. First operand 84 states and 116 transitions. Second operand has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:11,439 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 18:47:15,444 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:47:19,454 WARN L539 Checker$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 18:47:20,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:20,254 INFO L93 Difference]: Finished difference Result 163 states and 220 transitions. [2024-09-15 18:47:20,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:47:20,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-15 18:47:20,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:20,256 INFO L225 Difference]: With dead ends: 163 [2024-09-15 18:47:20,256 INFO L226 Difference]: Without dead ends: 155 [2024-09-15 18:47:20,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=241, Invalid=1165, Unknown=0, NotChecked=0, Total=1406 [2024-09-15 18:47:20,257 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 33 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 314 mSolverCounterSat, 13 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 314 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:20,258 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 156 Invalid, 330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 314 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2024-09-15 18:47:20,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2024-09-15 18:47:20,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 113. [2024-09-15 18:47:20,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4166666666666667) internal successors, (153), 108 states have internal predecessors, (153), 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 18:47:20,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 157 transitions. [2024-09-15 18:47:20,292 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 157 transitions. Word has length 22 [2024-09-15 18:47:20,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:20,292 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 157 transitions. [2024-09-15 18:47:20,292 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.625) internal successors, (39), 22 states have internal predecessors, (39), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:20,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,293 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 157 transitions. [2024-09-15 18:47:20,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:47:20,296 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:20,296 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:20,311 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 18:47:20,496 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 18:47:20,497 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:20,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1977285748, now seen corresponding path program 5 times [2024-09-15 18:47:20,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:20,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398521017] [2024-09-15 18:47:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:20,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:20,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:20,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:20,587 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:20,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398521017] [2024-09-15 18:47:20,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398521017] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:20,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365376378] [2024-09-15 18:47:20,588 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:20,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:20,588 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:20,593 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 18:47:20,594 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 18:47:20,639 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:47:20,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:20,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-15 18:47:20,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:20,680 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:20,680 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:20,773 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-15 18:47:20,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365376378] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:20,773 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:20,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-09-15 18:47:20,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779328845] [2024-09-15 18:47:20,774 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:20,774 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-15 18:47:20,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:20,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-15 18:47:20,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2024-09-15 18:47:20,775 INFO L87 Difference]: Start difference. First operand 113 states and 157 transitions. Second operand has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 18:47:21,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:21,003 INFO L93 Difference]: Finished difference Result 161 states and 225 transitions. [2024-09-15 18:47:21,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-15 18:47:21,003 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-15 18:47:21,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:21,004 INFO L225 Difference]: With dead ends: 161 [2024-09-15 18:47:21,004 INFO L226 Difference]: Without dead ends: 139 [2024-09-15 18:47:21,005 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=152, Invalid=498, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:47:21,005 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 40 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 145 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:21,005 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 136 Invalid, 169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 145 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:21,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2024-09-15 18:47:21,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 113. [2024-09-15 18:47:21,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 108 states have (on average 1.4259259259259258) internal successors, (154), 108 states have internal predecessors, (154), 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 113 states to 113 states and 158 transitions. [2024-09-15 18:47:21,048 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 158 transitions. Word has length 22 [2024-09-15 18:47:21,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:21,048 INFO L474 AbstractCegarLoop]: Abstraction has 113 states and 158 transitions. [2024-09-15 18:47:21,048 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 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 18:47:21,049 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 158 transitions. [2024-09-15 18:47:21,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-15 18:47:21,050 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:21,050 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:21,064 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 18:47:21,251 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 18:47:21,251 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:21,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,252 INFO L85 PathProgramCache]: Analyzing trace with hash -1179306556, now seen corresponding path program 6 times [2024-09-15 18:47:21,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:21,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094275695] [2024-09-15 18:47:21,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:21,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:21,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,312 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:21,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:21,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094275695] [2024-09-15 18:47:21,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094275695] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:21,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582885106] [2024-09-15 18:47:21,313 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:21,313 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:21,313 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:21,317 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 18:47:21,318 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 18:47:21,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:47:21,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:21,350 INFO L262 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:47:21,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:21,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:21,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-15 18:47:21,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582885106] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:21,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:21,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-15 18:47:21,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717200741] [2024-09-15 18:47:21,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:21,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-15 18:47:21,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-15 18:47:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:47:21,430 INFO L87 Difference]: Start difference. First operand 113 states and 158 transitions. Second operand has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:21,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:21,635 INFO L93 Difference]: Finished difference Result 152 states and 204 transitions. [2024-09-15 18:47:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-15 18:47:21,636 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-15 18:47:21,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:21,637 INFO L225 Difference]: With dead ends: 152 [2024-09-15 18:47:21,637 INFO L226 Difference]: Without dead ends: 137 [2024-09-15 18:47:21,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2024-09-15 18:47:21,638 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 18 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 206 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 206 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:21,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 201 Invalid, 224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 206 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2024-09-15 18:47:21,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 104. [2024-09-15 18:47:21,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 99 states have (on average 1.4141414141414141) internal successors, (140), 99 states have internal predecessors, (140), 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 18:47:21,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 144 transitions. [2024-09-15 18:47:21,666 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 144 transitions. Word has length 22 [2024-09-15 18:47:21,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:21,666 INFO L474 AbstractCegarLoop]: Abstraction has 104 states and 144 transitions. [2024-09-15 18:47:21,666 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.9285714285714286) internal successors, (27), 14 states have internal predecessors, (27), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:21,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,667 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 144 transitions. [2024-09-15 18:47:21,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 18:47:21,667 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:21,667 INFO L216 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:21,686 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-15 18:47:21,870 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 18:47:21,870 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:21,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:21,871 INFO L85 PathProgramCache]: Analyzing trace with hash -440203297, now seen corresponding path program 7 times [2024-09-15 18:47:21,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:21,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513197717] [2024-09-15 18:47:21,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:21,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,980 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:21,982 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 18:47:21,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513197717] [2024-09-15 18:47:21,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513197717] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:21,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [70569167] [2024-09-15 18:47:21,982 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:21,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:21,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:21,984 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 18:47:21,985 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 18:47:22,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,022 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-15 18:47:22,022 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:22,065 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 18:47:22,065 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:22,096 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 18:47:22,097 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [70569167] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:22,097 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:22,097 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-15 18:47:22,097 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716971977] [2024-09-15 18:47:22,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:22,097 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-15 18:47:22,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:22,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-15 18:47:22,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:22,098 INFO L87 Difference]: Start difference. First operand 104 states and 144 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 18:47:22,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:22,163 INFO L93 Difference]: Finished difference Result 115 states and 156 transitions. [2024-09-15 18:47:22,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-15 18:47:22,163 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 23 [2024-09-15 18:47:22,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:22,164 INFO L225 Difference]: With dead ends: 115 [2024-09-15 18:47:22,164 INFO L226 Difference]: Without dead ends: 99 [2024-09-15 18:47:22,165 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-15 18:47:22,165 INFO L434 NwaCegarLoop]: 20 mSDtfsCounter, 6 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:22,165 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 63 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:22,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2024-09-15 18:47:22,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 97. [2024-09-15 18:47:22,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.434782608695652) internal successors, (132), 92 states have internal predecessors, (132), 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 18:47:22,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 136 transitions. [2024-09-15 18:47:22,208 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 136 transitions. Word has length 23 [2024-09-15 18:47:22,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:22,209 INFO L474 AbstractCegarLoop]: Abstraction has 97 states and 136 transitions. [2024-09-15 18:47:22,209 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 5 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 18:47:22,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:22,210 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 136 transitions. [2024-09-15 18:47:22,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2024-09-15 18:47:22,210 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:22,210 INFO L216 NwaCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:22,227 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-15 18:47:22,417 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 18:47:22,417 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:22,418 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:22,418 INFO L85 PathProgramCache]: Analyzing trace with hash -1573610800, now seen corresponding path program 8 times [2024-09-15 18:47:22,418 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:22,418 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158489945] [2024-09-15 18:47:22,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:22,418 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:22,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,513 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:22,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:22,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:22,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158489945] [2024-09-15 18:47:22,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158489945] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:22,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720660549] [2024-09-15 18:47:22,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:22,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:22,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:22,518 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 18:47:22,523 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 18:47:22,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:22,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:22,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-09-15 18:47:22,560 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:22,590 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:22,590 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:22,733 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:22,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720660549] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:22,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:22,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 21 [2024-09-15 18:47:22,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223415297] [2024-09-15 18:47:22,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:22,734 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-15 18:47:22,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:22,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-15 18:47:22,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2024-09-15 18:47:22,735 INFO L87 Difference]: Start difference. First operand 97 states and 136 transitions. Second operand has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 18:47:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:24,684 INFO L93 Difference]: Finished difference Result 292 states and 446 transitions. [2024-09-15 18:47:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2024-09-15 18:47:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 23 [2024-09-15 18:47:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:24,688 INFO L225 Difference]: With dead ends: 292 [2024-09-15 18:47:24,688 INFO L226 Difference]: Without dead ends: 265 [2024-09-15 18:47:24,689 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1755 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1448, Invalid=3954, Unknown=0, NotChecked=0, Total=5402 [2024-09-15 18:47:24,690 INFO L434 NwaCegarLoop]: 35 mSDtfsCounter, 288 mSDsluCounter, 334 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 288 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:24,690 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [288 Valid, 369 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-15 18:47:24,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2024-09-15 18:47:24,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 116. [2024-09-15 18:47:24,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 111 states have (on average 1.4234234234234233) internal successors, (158), 111 states have internal predecessors, (158), 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 18:47:24,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 162 transitions. [2024-09-15 18:47:24,740 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 162 transitions. Word has length 23 [2024-09-15 18:47:24,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:24,741 INFO L474 AbstractCegarLoop]: Abstraction has 116 states and 162 transitions. [2024-09-15 18:47:24,741 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.5238095238095237) internal successors, (32), 21 states have internal predecessors, (32), 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 18:47:24,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:24,742 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 162 transitions. [2024-09-15 18:47:24,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 18:47:24,743 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:24,744 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:24,756 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-09-15 18:47:24,947 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 18:47:24,947 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:24,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:24,948 INFO L85 PathProgramCache]: Analyzing trace with hash 1610157924, now seen corresponding path program 9 times [2024-09-15 18:47:24,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:24,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741935917] [2024-09-15 18:47:24,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:24,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:24,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:25,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,086 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:25,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:25,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741935917] [2024-09-15 18:47:25,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741935917] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:25,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011639869] [2024-09-15 18:47:25,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:25,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:25,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:25,088 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 18:47:25,089 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 18:47:25,191 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:47:25,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:25,192 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:25,192 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:25,240 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:25,240 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:25,297 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-15 18:47:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2011639869] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:25,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2024-09-15 18:47:25,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068920150] [2024-09-15 18:47:25,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:25,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-15 18:47:25,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-15 18:47:25,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-15 18:47:25,299 INFO L87 Difference]: Start difference. First operand 116 states and 162 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 18:47:25,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:25,418 INFO L93 Difference]: Finished difference Result 150 states and 213 transitions. [2024-09-15 18:47:25,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-15 18:47:25,418 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 24 [2024-09-15 18:47:25,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:25,419 INFO L225 Difference]: With dead ends: 150 [2024-09-15 18:47:25,419 INFO L226 Difference]: Without dead ends: 145 [2024-09-15 18:47:25,420 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 41 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-15 18:47:25,420 INFO L434 NwaCegarLoop]: 22 mSDtfsCounter, 22 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 95 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 95 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:25,420 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 110 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 95 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:25,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2024-09-15 18:47:25,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 140. [2024-09-15 18:47:25,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.4370370370370371) internal successors, (194), 135 states have internal predecessors, (194), 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 18:47:25,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 198 transitions. [2024-09-15 18:47:25,469 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 198 transitions. Word has length 24 [2024-09-15 18:47:25,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:25,469 INFO L474 AbstractCegarLoop]: Abstraction has 140 states and 198 transitions. [2024-09-15 18:47:25,469 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 12 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 18:47:25,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:25,470 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 198 transitions. [2024-09-15 18:47:25,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-15 18:47:25,470 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:25,470 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:25,484 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-15 18:47:25,671 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 18:47:25,671 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:25,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:25,671 INFO L85 PathProgramCache]: Analyzing trace with hash 1973759170, now seen corresponding path program 2 times [2024-09-15 18:47:25,671 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:25,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567377656] [2024-09-15 18:47:25,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:25,672 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:25,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:25,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:25,754 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:25,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567377656] [2024-09-15 18:47:25,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567377656] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:25,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291332406] [2024-09-15 18:47:25,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:25,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:25,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:25,757 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 18:47:25,761 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 18:47:25,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:25,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:25,792 INFO L262 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-15 18:47:25,793 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:25,848 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:25,983 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:25,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291332406] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:25,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:25,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 22 [2024-09-15 18:47:25,984 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060300474] [2024-09-15 18:47:25,984 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:25,984 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-15 18:47:25,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:25,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-15 18:47:25,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=365, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:47:25,985 INFO L87 Difference]: Start difference. First operand 140 states and 198 transitions. Second operand has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:26,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:26,377 INFO L93 Difference]: Finished difference Result 226 states and 304 transitions. [2024-09-15 18:47:26,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-09-15 18:47:26,377 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2024-09-15 18:47:26,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:26,382 INFO L225 Difference]: With dead ends: 226 [2024-09-15 18:47:26,382 INFO L226 Difference]: Without dead ends: 203 [2024-09-15 18:47:26,383 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=288, Invalid=1044, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 18:47:26,383 INFO L434 NwaCegarLoop]: 19 mSDtfsCounter, 76 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 237 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 226 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 237 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:26,383 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 226 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 237 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:47:26,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2024-09-15 18:47:26,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 151. [2024-09-15 18:47:26,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.417808219178082) internal successors, (207), 146 states have internal predecessors, (207), 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 18:47:26,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 211 transitions. [2024-09-15 18:47:26,426 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 211 transitions. Word has length 24 [2024-09-15 18:47:26,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:26,426 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 211 transitions. [2024-09-15 18:47:26,426 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.6363636363636365) internal successors, (36), 22 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:26,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:26,426 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 211 transitions. [2024-09-15 18:47:26,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:26,427 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:26,427 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:26,439 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 18:47:26,627 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 18:47:26,628 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:26,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash -1984219964, now seen corresponding path program 10 times [2024-09-15 18:47:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263370164] [2024-09-15 18:47:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:26,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:26,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:26,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-15 18:47:26,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263370164] [2024-09-15 18:47:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263370164] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:26,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930797851] [2024-09-15 18:47:26,945 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:26,946 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:26,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:26,948 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 18:47:26,948 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 18:47:26,993 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:26,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:26,994 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-15 18:47:26,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:27,200 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:27,200 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:27,460 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:27,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930797851] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:27,462 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:27,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 12] total 25 [2024-09-15 18:47:27,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544352422] [2024-09-15 18:47:27,462 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:27,463 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-15 18:47:27,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:27,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-15 18:47:27,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=510, Unknown=0, NotChecked=0, Total=600 [2024-09-15 18:47:27,463 INFO L87 Difference]: Start difference. First operand 151 states and 211 transitions. Second operand has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:28,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:28,354 INFO L93 Difference]: Finished difference Result 206 states and 269 transitions. [2024-09-15 18:47:28,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-09-15 18:47:28,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-15 18:47:28,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:28,356 INFO L225 Difference]: With dead ends: 206 [2024-09-15 18:47:28,356 INFO L226 Difference]: Without dead ends: 197 [2024-09-15 18:47:28,357 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=230, Invalid=1330, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:47:28,357 INFO L434 NwaCegarLoop]: 11 mSDtfsCounter, 27 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 361 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 383 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:28,357 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 107 Invalid, 383 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 361 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:28,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-15 18:47:28,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 159. [2024-09-15 18:47:28,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 154 states have (on average 1.396103896103896) internal successors, (215), 154 states have internal predecessors, (215), 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 18:47:28,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 219 transitions. [2024-09-15 18:47:28,411 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 219 transitions. Word has length 26 [2024-09-15 18:47:28,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:28,411 INFO L474 AbstractCegarLoop]: Abstraction has 159 states and 219 transitions. [2024-09-15 18:47:28,411 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.76) internal successors, (44), 23 states have internal predecessors, (44), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:28,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,411 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 219 transitions. [2024-09-15 18:47:28,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:28,412 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:28,412 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:28,426 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:28,616 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 18:47:28,617 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:28,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:28,617 INFO L85 PathProgramCache]: Analyzing trace with hash 584879828, now seen corresponding path program 11 times [2024-09-15 18:47:28,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:28,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721417288] [2024-09-15 18:47:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:28,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:28,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:28,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:28,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 18:47:28,697 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721417288] [2024-09-15 18:47:28,697 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721417288] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:28,697 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109285154] [2024-09-15 18:47:28,698 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:47:28,698 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:28,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:28,699 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 18:47:28,700 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 18:47:28,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-09-15 18:47:28,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:28,738 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:47:28,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:28,775 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-15 18:47:28,775 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:28,868 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-15 18:47:28,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [109285154] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:28,869 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:28,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 8] total 19 [2024-09-15 18:47:28,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345712719] [2024-09-15 18:47:28,869 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:28,869 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-15 18:47:28,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:28,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-15 18:47:28,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2024-09-15 18:47:28,870 INFO L87 Difference]: Start difference. First operand 159 states and 219 transitions. Second operand has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 18:47:29,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:29,254 INFO L93 Difference]: Finished difference Result 229 states and 302 transitions. [2024-09-15 18:47:29,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2024-09-15 18:47:29,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 18:47:29,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:29,255 INFO L225 Difference]: With dead ends: 229 [2024-09-15 18:47:29,255 INFO L226 Difference]: Without dead ends: 197 [2024-09-15 18:47:29,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=772, Unknown=0, NotChecked=0, Total=930 [2024-09-15 18:47:29,256 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 34 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 351 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:29,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 247 Invalid, 351 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:29,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-09-15 18:47:29,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 147. [2024-09-15 18:47:29,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.3732394366197183) internal successors, (195), 142 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 18:47:29,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 199 transitions. [2024-09-15 18:47:29,305 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 199 transitions. Word has length 26 [2024-09-15 18:47:29,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:29,305 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 199 transitions. [2024-09-15 18:47:29,306 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 19 states have internal predecessors, (32), 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 18:47:29,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:29,306 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 199 transitions. [2024-09-15 18:47:29,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-15 18:47:29,306 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:29,306 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:29,318 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-15 18:47:29,510 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 18:47:29,510 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:29,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:29,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1890436396, now seen corresponding path program 3 times [2024-09-15 18:47:29,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:29,511 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226320242] [2024-09-15 18:47:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:29,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:29,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:29,711 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:29,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:29,713 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 10 proven. 10 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:29,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:29,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226320242] [2024-09-15 18:47:29,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226320242] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:29,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509834351] [2024-09-15 18:47:29,714 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:29,714 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:29,714 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:29,715 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 18:47:29,716 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 18:47:29,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-15 18:47:29,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:29,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-09-15 18:47:29,749 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:29,863 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:29,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:30,095 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:47:30,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509834351] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:30,095 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:30,096 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2024-09-15 18:47:30,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505012940] [2024-09-15 18:47:30,096 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:30,096 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 18:47:30,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:30,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 18:47:30,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=549, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:47:30,097 INFO L87 Difference]: Start difference. First operand 147 states and 199 transitions. Second operand has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:30,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:30,586 INFO L93 Difference]: Finished difference Result 172 states and 233 transitions. [2024-09-15 18:47:30,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-09-15 18:47:30,587 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-15 18:47:30,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:30,588 INFO L225 Difference]: With dead ends: 172 [2024-09-15 18:47:30,588 INFO L226 Difference]: Without dead ends: 167 [2024-09-15 18:47:30,588 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:47:30,592 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 49 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:30,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 330 Invalid, 493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-15 18:47:30,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2024-09-15 18:47:30,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 142. [2024-09-15 18:47:30,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.3795620437956204) internal successors, (189), 137 states have internal predecessors, (189), 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 18:47:30,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 193 transitions. [2024-09-15 18:47:30,639 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 193 transitions. Word has length 26 [2024-09-15 18:47:30,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:30,639 INFO L474 AbstractCegarLoop]: Abstraction has 142 states and 193 transitions. [2024-09-15 18:47:30,639 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.125) internal successors, (51), 25 states have internal predecessors, (51), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:30,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:30,640 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 193 transitions. [2024-09-15 18:47:30,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 18:47:30,640 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:30,640 INFO L216 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:30,653 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-15 18:47:30,844 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 18:47:30,845 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:30,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:30,845 INFO L85 PathProgramCache]: Analyzing trace with hash -1345738961, now seen corresponding path program 12 times [2024-09-15 18:47:30,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:30,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14154645] [2024-09-15 18:47:30,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:30,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:30,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:30,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:30,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:30,917 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:47:30,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:30,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14154645] [2024-09-15 18:47:30,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14154645] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:30,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300316808] [2024-09-15 18:47:30,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:47:30,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:30,918 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:30,919 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 18:47:30,921 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 18:47:30,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-15 18:47:30,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:30,953 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-15 18:47:30,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:30,981 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:47:30,981 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:31,024 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:47:31,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300316808] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:31,025 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:31,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 6 [2024-09-15 18:47:31,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933126415] [2024-09-15 18:47:31,025 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:31,025 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-15 18:47:31,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:31,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-15 18:47:31,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:31,026 INFO L87 Difference]: Start difference. First operand 142 states and 193 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:31,113 INFO L93 Difference]: Finished difference Result 160 states and 212 transitions. [2024-09-15 18:47:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-15 18:47:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-15 18:47:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:31,115 INFO L225 Difference]: With dead ends: 160 [2024-09-15 18:47:31,115 INFO L226 Difference]: Without dead ends: 141 [2024-09-15 18:47:31,115 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 54 SyntacticMatches, 6 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-09-15 18:47:31,115 INFO L434 NwaCegarLoop]: 23 mSDtfsCounter, 9 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 50 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:31,116 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 93 Invalid, 50 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-15 18:47:31,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2024-09-15 18:47:31,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 138. [2024-09-15 18:47:31,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 133 states have internal predecessors, (184), 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 18:47:31,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 188 transitions. [2024-09-15 18:47:31,166 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 188 transitions. Word has length 27 [2024-09-15 18:47:31,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:31,167 INFO L474 AbstractCegarLoop]: Abstraction has 138 states and 188 transitions. [2024-09-15 18:47:31,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:31,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:31,167 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 188 transitions. [2024-09-15 18:47:31,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-15 18:47:31,167 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:31,168 INFO L216 NwaCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:31,180 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 18:47:31,371 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 18:47:31,371 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:31,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:31,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1350871200, now seen corresponding path program 3 times [2024-09-15 18:47:31,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:31,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189614676] [2024-09-15 18:47:31,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:31,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:31,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:31,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:31,575 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 18:47:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189614676] [2024-09-15 18:47:31,576 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189614676] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:31,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415984220] [2024-09-15 18:47:31,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:31,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:31,576 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:31,578 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 18:47:31,579 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 18:47:31,623 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-15 18:47:31,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:31,624 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 18:47:31,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:31,653 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 18:47:31,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:32,034 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 18:47:32,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415984220] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:32,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:32,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-15 18:47:32,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335945926] [2024-09-15 18:47:32,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:32,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:47:32,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:32,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:47:32,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=261, Invalid=795, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:47:32,037 INFO L87 Difference]: Start difference. First operand 138 states and 188 transitions. Second operand has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:37,453 INFO L93 Difference]: Finished difference Result 722 states and 1069 transitions. [2024-09-15 18:47:37,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2024-09-15 18:47:37,454 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2024-09-15 18:47:37,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:37,456 INFO L225 Difference]: With dead ends: 722 [2024-09-15 18:47:37,457 INFO L226 Difference]: Without dead ends: 680 [2024-09-15 18:47:37,458 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1704 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=2101, Invalid=4705, Unknown=0, NotChecked=0, Total=6806 [2024-09-15 18:47:37,459 INFO L434 NwaCegarLoop]: 55 mSDtfsCounter, 1057 mSDsluCounter, 847 mSDsCounter, 0 mSdLazyCounter, 1101 mSolverCounterSat, 531 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1057 SdHoareTripleChecker+Valid, 902 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 531 IncrementalHoareTripleChecker+Valid, 1101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:37,460 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1057 Valid, 902 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [531 Valid, 1101 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-15 18:47:37,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2024-09-15 18:47:37,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 202. [2024-09-15 18:47:37,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.3908629441624365) internal successors, (274), 197 states have internal predecessors, (274), 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 18:47:37,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 278 transitions. [2024-09-15 18:47:37,558 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 278 transitions. Word has length 27 [2024-09-15 18:47:37,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:37,558 INFO L474 AbstractCegarLoop]: Abstraction has 202 states and 278 transitions. [2024-09-15 18:47:37,558 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.2727272727272727) internal successors, (42), 33 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:37,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,558 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 278 transitions. [2024-09-15 18:47:37,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-15 18:47:37,559 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:37,559 INFO L216 NwaCegarLoop]: trace histogram [6, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:37,571 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 18:47:37,764 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 18:47:37,764 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:37,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:37,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1276317644, now seen corresponding path program 4 times [2024-09-15 18:47:37,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:37,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1077237117] [2024-09-15 18:47:37,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:37,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:37,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:37,922 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:37,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:37,924 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 20 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2024-09-15 18:47:37,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:37,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1077237117] [2024-09-15 18:47:37,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1077237117] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:37,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706634826] [2024-09-15 18:47:37,925 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:47:37,925 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:37,925 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:37,926 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 18:47:37,930 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 18:47:37,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:47:37,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:37,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-15 18:47:37,965 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:38,086 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:47:38,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:38,270 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:47:38,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706634826] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:38,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:38,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 26 [2024-09-15 18:47:38,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133397622] [2024-09-15 18:47:38,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:38,271 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-15 18:47:38,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:38,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-15 18:47:38,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:47:38,272 INFO L87 Difference]: Start difference. First operand 202 states and 278 transitions. Second operand has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:39,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:39,613 INFO L93 Difference]: Finished difference Result 523 states and 746 transitions. [2024-09-15 18:47:39,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-09-15 18:47:39,614 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-15 18:47:39,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:39,616 INFO L225 Difference]: With dead ends: 523 [2024-09-15 18:47:39,616 INFO L226 Difference]: Without dead ends: 510 [2024-09-15 18:47:39,617 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 457 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=607, Invalid=2363, Unknown=0, NotChecked=0, Total=2970 [2024-09-15 18:47:39,620 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 181 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 668 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:39,620 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 333 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 668 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:47:39,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2024-09-15 18:47:39,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 359. [2024-09-15 18:47:39,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 354 states have (on average 1.5169491525423728) internal successors, (537), 354 states have internal predecessors, (537), 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 18:47:39,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 541 transitions. [2024-09-15 18:47:39,773 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 541 transitions. Word has length 28 [2024-09-15 18:47:39,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:39,773 INFO L474 AbstractCegarLoop]: Abstraction has 359 states and 541 transitions. [2024-09-15 18:47:39,773 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.8076923076923077) internal successors, (47), 26 states have internal predecessors, (47), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:39,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:39,773 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 541 transitions. [2024-09-15 18:47:39,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:47:39,774 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:39,774 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:39,786 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-15 18:47:39,978 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 18:47:39,978 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:39,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:39,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1971358316, now seen corresponding path program 13 times [2024-09-15 18:47:39,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:39,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750113029] [2024-09-15 18:47:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:39,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:40,529 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:40,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:40,531 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:47:40,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:40,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750113029] [2024-09-15 18:47:40,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750113029] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:40,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841208250] [2024-09-15 18:47:40,533 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:47:40,533 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:40,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:40,534 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 18:47:40,535 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 18:47:40,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:40,626 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 63 conjuncts are in the unsatisfiable core [2024-09-15 18:47:40,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:41,298 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:41,298 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:42,341 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:47:42,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841208250] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:42,341 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:42,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 23, 23] total 53 [2024-09-15 18:47:42,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016456863] [2024-09-15 18:47:42,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:42,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-09-15 18:47:42,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:42,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-09-15 18:47:42,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=490, Invalid=2266, Unknown=0, NotChecked=0, Total=2756 [2024-09-15 18:47:42,345 INFO L87 Difference]: Start difference. First operand 359 states and 541 transitions. Second operand has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:45,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:45,667 INFO L93 Difference]: Finished difference Result 547 states and 730 transitions. [2024-09-15 18:47:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-15 18:47:45,667 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-15 18:47:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:45,669 INFO L225 Difference]: With dead ends: 547 [2024-09-15 18:47:45,669 INFO L226 Difference]: Without dead ends: 526 [2024-09-15 18:47:45,671 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1837 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1293, Invalid=5847, Unknown=0, NotChecked=0, Total=7140 [2024-09-15 18:47:45,671 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 106 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 647 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 647 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:45,671 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 207 Invalid, 791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 647 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:47:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2024-09-15 18:47:45,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 353. [2024-09-15 18:47:45,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 348 states have (on average 1.5229885057471264) internal successors, (530), 348 states have internal predecessors, (530), 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 18:47:45,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 534 transitions. [2024-09-15 18:47:45,833 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 534 transitions. Word has length 30 [2024-09-15 18:47:45,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:45,833 INFO L474 AbstractCegarLoop]: Abstraction has 353 states and 534 transitions. [2024-09-15 18:47:45,834 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 52 states have (on average 1.3269230769230769) internal successors, (69), 51 states have internal predecessors, (69), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:47:45,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:45,834 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 534 transitions. [2024-09-15 18:47:45,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-15 18:47:45,835 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:45,835 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:45,848 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:46,039 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 18:47:46,040 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:46,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1543645636, now seen corresponding path program 14 times [2024-09-15 18:47:46,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:46,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543635607] [2024-09-15 18:47:46,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:46,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:46,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:46,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:46,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:46,149 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:47:46,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543635607] [2024-09-15 18:47:46,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543635607] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:46,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784709334] [2024-09-15 18:47:46,149 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:47:46,149 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:46,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:46,154 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 18:47:46,167 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-15 18:47:46,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:47:46,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:46,221 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-15 18:47:46,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:46,279 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:47:46,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 8 proven. 12 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:47:46,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784709334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:46,429 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:46,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 10] total 24 [2024-09-15 18:47:46,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454912786] [2024-09-15 18:47:46,429 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:46,429 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:47:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:46,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:47:46,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=454, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:47:46,430 INFO L87 Difference]: Start difference. First operand 353 states and 534 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 18:47:47,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:47:47,191 INFO L93 Difference]: Finished difference Result 525 states and 720 transitions. [2024-09-15 18:47:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-15 18:47:47,192 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 30 [2024-09-15 18:47:47,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:47:47,194 INFO L225 Difference]: With dead ends: 525 [2024-09-15 18:47:47,194 INFO L226 Difference]: Without dead ends: 454 [2024-09-15 18:47:47,195 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=942, Unknown=0, NotChecked=0, Total=1122 [2024-09-15 18:47:47,195 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 41 mSDsluCounter, 260 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:47:47,199 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 288 Invalid, 407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-15 18:47:47,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-09-15 18:47:47,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 338. [2024-09-15 18:47:47,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 333 states have (on average 1.5045045045045045) internal successors, (501), 333 states have internal predecessors, (501), 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 18:47:47,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 505 transitions. [2024-09-15 18:47:47,373 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 505 transitions. Word has length 30 [2024-09-15 18:47:47,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:47:47,373 INFO L474 AbstractCegarLoop]: Abstraction has 338 states and 505 transitions. [2024-09-15 18:47:47,373 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 18:47:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:47,373 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 505 transitions. [2024-09-15 18:47:47,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-15 18:47:47,374 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:47:47,374 INFO L216 NwaCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:47:47,386 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-15 18:47:47,576 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-15 18:47:47,577 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:47:47,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:47:47,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1730942160, now seen corresponding path program 15 times [2024-09-15 18:47:47,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:47:47,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1978509652] [2024-09-15 18:47:47,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:47:47,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:47:47,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:47,794 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:47:47,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:47:47,796 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:47,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:47:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1978509652] [2024-09-15 18:47:47,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1978509652] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:47:47,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869902021] [2024-09-15 18:47:47,796 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:47:47,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:47:47,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:47:47,799 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:47:47,800 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-15 18:47:47,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2024-09-15 18:47:47,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:47:47,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:47:47,913 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:47:47,946 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:47,946 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:47:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-15 18:47:48,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869902021] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:47:48,368 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:47:48,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19, 19] total 37 [2024-09-15 18:47:48,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139170420] [2024-09-15 18:47:48,368 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:47:48,369 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-15 18:47:48,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:47:48,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-15 18:47:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=1030, Unknown=0, NotChecked=0, Total=1332 [2024-09-15 18:47:48,370 INFO L87 Difference]: Start difference. First operand 338 states and 505 transitions. Second operand has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:02,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:02,874 INFO L93 Difference]: Finished difference Result 1266 states and 1894 transitions. [2024-09-15 18:48:02,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2024-09-15 18:48:02,875 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-15 18:48:02,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:02,882 INFO L225 Difference]: With dead ends: 1266 [2024-09-15 18:48:02,885 INFO L226 Difference]: Without dead ends: 1233 [2024-09-15 18:48:02,889 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9190 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=6620, Invalid=17560, Unknown=0, NotChecked=0, Total=24180 [2024-09-15 18:48:02,890 INFO L434 NwaCegarLoop]: 65 mSDtfsCounter, 1519 mSDsluCounter, 1159 mSDsCounter, 0 mSdLazyCounter, 1433 mSolverCounterSat, 804 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1519 SdHoareTripleChecker+Valid, 1224 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 804 IncrementalHoareTripleChecker+Valid, 1433 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:02,891 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1519 Valid, 1224 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [804 Valid, 1433 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-15 18:48:02,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1233 states. [2024-09-15 18:48:03,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1233 to 389. [2024-09-15 18:48:03,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.5208333333333333) internal successors, (584), 384 states have internal predecessors, (584), 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 18:48:03,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 588 transitions. [2024-09-15 18:48:03,129 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 588 transitions. Word has length 31 [2024-09-15 18:48:03,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:03,129 INFO L474 AbstractCegarLoop]: Abstraction has 389 states and 588 transitions. [2024-09-15 18:48:03,129 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2972972972972974) internal successors, (48), 37 states have internal predecessors, (48), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:03,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:03,129 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 588 transitions. [2024-09-15 18:48:03,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-15 18:48:03,130 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:03,130 INFO L216 NwaCegarLoop]: trace histogram [8, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:03,143 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:03,330 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-15 18:48:03,331 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:03,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:03,331 INFO L85 PathProgramCache]: Analyzing trace with hash -1355997583, now seen corresponding path program 16 times [2024-09-15 18:48:03,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:03,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29493629] [2024-09-15 18:48:03,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:03,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:03,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:03,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:03,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 18 proven. 30 refuted. 0 times theorem prover too weak. 19 trivial. 0 not checked. [2024-09-15 18:48:03,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29493629] [2024-09-15 18:48:03,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29493629] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:03,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171813422] [2024-09-15 18:48:03,531 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:48:03,531 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:03,532 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:03,533 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:48:03,533 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-15 18:48:03,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:48:03,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:03,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-15 18:48:03,577 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:48:03,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:04,003 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2024-09-15 18:48:04,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171813422] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:04,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:04,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17, 17] total 32 [2024-09-15 18:48:04,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377444961] [2024-09-15 18:48:04,004 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:04,004 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-15 18:48:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:04,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-15 18:48:04,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=169, Invalid=823, Unknown=0, NotChecked=0, Total=992 [2024-09-15 18:48:04,006 INFO L87 Difference]: Start difference. First operand 389 states and 588 transitions. Second operand has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:13,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:13,528 INFO L93 Difference]: Finished difference Result 977 states and 1248 transitions. [2024-09-15 18:48:13,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2024-09-15 18:48:13,529 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2024-09-15 18:48:13,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:13,535 INFO L225 Difference]: With dead ends: 977 [2024-09-15 18:48:13,538 INFO L226 Difference]: Without dead ends: 909 [2024-09-15 18:48:13,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10591 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=4448, Invalid=27414, Unknown=0, NotChecked=0, Total=31862 [2024-09-15 18:48:13,540 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 544 mSDsluCounter, 436 mSDsCounter, 0 mSdLazyCounter, 937 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 544 SdHoareTripleChecker+Valid, 461 SdHoareTripleChecker+Invalid, 1294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 937 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:13,540 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [544 Valid, 461 Invalid, 1294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 937 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-15 18:48:13,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 909 states. [2024-09-15 18:48:13,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 909 to 380. [2024-09-15 18:48:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.4666666666666666) internal successors, (550), 375 states have internal predecessors, (550), 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 18:48:13,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 554 transitions. [2024-09-15 18:48:13,787 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 554 transitions. Word has length 33 [2024-09-15 18:48:13,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:13,788 INFO L474 AbstractCegarLoop]: Abstraction has 380 states and 554 transitions. [2024-09-15 18:48:13,788 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.40625) internal successors, (45), 32 states have internal predecessors, (45), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:48:13,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:13,788 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 554 transitions. [2024-09-15 18:48:13,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-15 18:48:13,789 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:13,789 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:13,802 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2024-09-15 18:48:13,989 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-15 18:48:13,990 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:13,990 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:13,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1745547068, now seen corresponding path program 17 times [2024-09-15 18:48:13,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:13,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262100401] [2024-09-15 18:48:13,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:13,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:14,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:14,497 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:14,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-15 18:48:14,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:14,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262100401] [2024-09-15 18:48:14,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262100401] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:14,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028571330] [2024-09-15 18:48:14,499 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:48:14,499 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:14,500 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:14,501 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:48:14,502 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-15 18:48:14,605 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-15 18:48:14,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:14,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-09-15 18:48:14,613 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:15,289 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:16,580 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:48:16,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028571330] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:16,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:16,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 26, 26] total 57 [2024-09-15 18:48:16,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811331790] [2024-09-15 18:48:16,580 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:16,581 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2024-09-15 18:48:16,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:16,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2024-09-15 18:48:16,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=395, Invalid=2797, Unknown=0, NotChecked=0, Total=3192 [2024-09-15 18:48:16,582 INFO L87 Difference]: Start difference. First operand 380 states and 554 transitions. Second operand has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 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 18:48:20,674 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-15 18:48:24,703 WARN L539 Checker$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 18:48:28,752 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 18:48:31,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:48:31,865 INFO L93 Difference]: Finished difference Result 537 states and 711 transitions. [2024-09-15 18:48:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-15 18:48:31,865 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 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 18:48:31,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:48:31,871 INFO L225 Difference]: With dead ends: 537 [2024-09-15 18:48:31,871 INFO L226 Difference]: Without dead ends: 513 [2024-09-15 18:48:31,872 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1184 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=694, Invalid=4276, Unknown=0, NotChecked=0, Total=4970 [2024-09-15 18:48:31,872 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 60 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 864 mSolverCounterSat, 99 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 864 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:48:31,872 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 235 Invalid, 966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 864 Invalid, 3 Unknown, 0 Unchecked, 12.7s Time] [2024-09-15 18:48:31,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2024-09-15 18:48:32,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 373. [2024-09-15 18:48:32,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 373 states, 368 states have (on average 1.4728260869565217) internal successors, (542), 368 states have internal predecessors, (542), 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 18:48:32,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 373 states to 373 states and 546 transitions. [2024-09-15 18:48:32,129 INFO L78 Accepts]: Start accepts. Automaton has 373 states and 546 transitions. Word has length 34 [2024-09-15 18:48:32,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:48:32,129 INFO L474 AbstractCegarLoop]: Abstraction has 373 states and 546 transitions. [2024-09-15 18:48:32,130 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.3508771929824561) internal successors, (77), 55 states have internal predecessors, (77), 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 18:48:32,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:32,130 INFO L276 IsEmpty]: Start isEmpty. Operand 373 states and 546 transitions. [2024-09-15 18:48:32,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2024-09-15 18:48:32,131 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:48:32,131 INFO L216 NwaCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:48:32,146 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2024-09-15 18:48:32,334 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-15 18:48:32,334 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:48:32,335 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:48:32,335 INFO L85 PathProgramCache]: Analyzing trace with hash -2099284960, now seen corresponding path program 18 times [2024-09-15 18:48:32,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:48:32,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708461038] [2024-09-15 18:48:32,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:48:32,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:48:32,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:32,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:48:32,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:48:32,600 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:48:32,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:48:32,600 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708461038] [2024-09-15 18:48:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708461038] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:48:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745355794] [2024-09-15 18:48:32,601 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:48:32,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:48:32,601 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:48:32,602 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:48:32,604 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-15 18:48:32,919 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2024-09-15 18:48:32,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:48:32,920 INFO L262 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:48:32,921 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:48:32,950 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:48:32,950 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:48:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-15 18:48:33,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745355794] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:48:33,466 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:48:33,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 41 [2024-09-15 18:48:33,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621604998] [2024-09-15 18:48:33,467 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:48:33,467 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2024-09-15 18:48:33,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:48:33,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2024-09-15 18:48:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=347, Invalid=1293, Unknown=0, NotChecked=0, Total=1640 [2024-09-15 18:48:33,468 INFO L87 Difference]: Start difference. First operand 373 states and 546 transitions. Second operand has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:04,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:04,457 INFO L93 Difference]: Finished difference Result 1359 states and 1922 transitions. [2024-09-15 18:49:04,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 214 states. [2024-09-15 18:49:04,457 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2024-09-15 18:49:04,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:04,460 INFO L225 Difference]: With dead ends: 1359 [2024-09-15 18:49:04,461 INFO L226 Difference]: Without dead ends: 1303 [2024-09-15 18:49:04,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22334 ImplicationChecksByTransitivity, 26.7s TimeCoverageRelationStatistics Valid=12949, Invalid=42041, Unknown=0, NotChecked=0, Total=54990 [2024-09-15 18:49:04,463 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 1957 mSDsluCounter, 1328 mSDsCounter, 0 mSdLazyCounter, 1662 mSolverCounterSat, 1130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1957 SdHoareTripleChecker+Valid, 1399 SdHoareTripleChecker+Invalid, 2792 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1130 IncrementalHoareTripleChecker+Valid, 1662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:04,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1957 Valid, 1399 Invalid, 2792 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1130 Valid, 1662 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2024-09-15 18:49:04,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2024-09-15 18:49:04,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 397. [2024-09-15 18:49:04,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 397 states, 392 states have (on average 1.469387755102041) internal successors, (576), 392 states have internal predecessors, (576), 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 18:49:04,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 397 states to 397 states and 580 transitions. [2024-09-15 18:49:04,758 INFO L78 Accepts]: Start accepts. Automaton has 397 states and 580 transitions. Word has length 35 [2024-09-15 18:49:04,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:04,758 INFO L474 AbstractCegarLoop]: Abstraction has 397 states and 580 transitions. [2024-09-15 18:49:04,759 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2682926829268293) internal successors, (52), 41 states have internal predecessors, (52), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:04,759 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:04,759 INFO L276 IsEmpty]: Start isEmpty. Operand 397 states and 580 transitions. [2024-09-15 18:49:04,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:49:04,763 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:04,763 INFO L216 NwaCegarLoop]: trace histogram [9, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:04,779 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2024-09-15 18:49:04,964 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-09-15 18:49:04,964 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:04,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:04,965 INFO L85 PathProgramCache]: Analyzing trace with hash -1960374636, now seen corresponding path program 19 times [2024-09-15 18:49:04,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:04,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757529240] [2024-09-15 18:49:04,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:04,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:05,179 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:05,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:05,181 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 21 proven. 42 refuted. 0 times theorem prover too weak. 25 trivial. 0 not checked. [2024-09-15 18:49:05,182 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757529240] [2024-09-15 18:49:05,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757529240] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:05,182 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741404334] [2024-09-15 18:49:05,182 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:49:05,182 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:05,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:05,184 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:05,187 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-15 18:49:05,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:05,225 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 35 conjuncts are in the unsatisfiable core [2024-09-15 18:49:05,226 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:05,314 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:49:05,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:05,740 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-15 18:49:05,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741404334] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:05,741 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:05,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19, 19] total 36 [2024-09-15 18:49:05,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213160856] [2024-09-15 18:49:05,741 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:05,742 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-15 18:49:05,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:05,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-15 18:49:05,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=1053, Unknown=0, NotChecked=0, Total=1260 [2024-09-15 18:49:05,743 INFO L87 Difference]: Start difference. First operand 397 states and 580 transitions. Second operand has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 18:49:22,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:22,912 INFO L93 Difference]: Finished difference Result 1046 states and 1322 transitions. [2024-09-15 18:49:22,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 200 states. [2024-09-15 18:49:22,912 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 36 [2024-09-15 18:49:22,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:22,915 INFO L225 Difference]: With dead ends: 1046 [2024-09-15 18:49:22,915 INFO L226 Difference]: Without dead ends: 973 [2024-09-15 18:49:22,917 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17784 ImplicationChecksByTransitivity, 14.5s TimeCoverageRelationStatistics Valid=6646, Invalid=43754, Unknown=0, NotChecked=0, Total=50400 [2024-09-15 18:49:22,918 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 804 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 891 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 440 SdHoareTripleChecker+Invalid, 1447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:22,918 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [804 Valid, 440 Invalid, 1447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 891 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2024-09-15 18:49:22,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 973 states. [2024-09-15 18:49:23,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 973 to 389. [2024-09-15 18:49:23,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 389 states, 384 states have (on average 1.4322916666666667) internal successors, (550), 384 states have internal predecessors, (550), 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 18:49:23,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 389 states to 389 states and 554 transitions. [2024-09-15 18:49:23,229 INFO L78 Accepts]: Start accepts. Automaton has 389 states and 554 transitions. Word has length 36 [2024-09-15 18:49:23,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:23,229 INFO L474 AbstractCegarLoop]: Abstraction has 389 states and 554 transitions. [2024-09-15 18:49:23,229 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.3611111111111112) internal successors, (49), 36 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 18:49:23,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:23,230 INFO L276 IsEmpty]: Start isEmpty. Operand 389 states and 554 transitions. [2024-09-15 18:49:23,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-15 18:49:23,230 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:23,230 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:23,243 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:23,434 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:23,435 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:23,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:23,435 INFO L85 PathProgramCache]: Analyzing trace with hash -733195100, now seen corresponding path program 20 times [2024-09-15 18:49:23,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:23,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473918056] [2024-09-15 18:49:23,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:23,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:23,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:23,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 28 proven. 29 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-15 18:49:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473918056] [2024-09-15 18:49:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473918056] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156198287] [2024-09-15 18:49:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:49:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:23,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:23,688 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:23,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-15 18:49:23,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:49:23,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:23,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-15 18:49:23,731 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:49:23,852 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:24,034 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 12 proven. 44 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:49:24,034 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156198287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:24,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:24,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10, 10] total 24 [2024-09-15 18:49:24,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699272750] [2024-09-15 18:49:24,035 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:24,035 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-15 18:49:24,035 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-15 18:49:24,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=413, Unknown=0, NotChecked=0, Total=552 [2024-09-15 18:49:24,036 INFO L87 Difference]: Start difference. First operand 389 states and 554 transitions. Second operand has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 18:49:24,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:24,551 INFO L93 Difference]: Finished difference Result 459 states and 645 transitions. [2024-09-15 18:49:24,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-15 18:49:24,551 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 36 [2024-09-15 18:49:24,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:24,553 INFO L225 Difference]: With dead ends: 459 [2024-09-15 18:49:24,553 INFO L226 Difference]: Without dead ends: 454 [2024-09-15 18:49:24,553 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 53 SyntacticMatches, 15 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=164, Invalid=486, Unknown=0, NotChecked=0, Total=650 [2024-09-15 18:49:24,554 INFO L434 NwaCegarLoop]: 34 mSDtfsCounter, 90 mSDsluCounter, 224 mSDsCounter, 0 mSdLazyCounter, 225 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 225 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:24,554 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [90 Valid, 258 Invalid, 264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 225 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-15 18:49:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2024-09-15 18:49:24,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 443. [2024-09-15 18:49:24,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 443 states, 438 states have (on average 1.3972602739726028) internal successors, (612), 438 states have internal predecessors, (612), 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 18:49:24,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 443 states to 443 states and 616 transitions. [2024-09-15 18:49:24,912 INFO L78 Accepts]: Start accepts. Automaton has 443 states and 616 transitions. Word has length 36 [2024-09-15 18:49:24,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:24,912 INFO L474 AbstractCegarLoop]: Abstraction has 443 states and 616 transitions. [2024-09-15 18:49:24,912 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.9166666666666667) internal successors, (46), 24 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 18:49:24,913 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:24,913 INFO L276 IsEmpty]: Start isEmpty. Operand 443 states and 616 transitions. [2024-09-15 18:49:24,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2024-09-15 18:49:24,913 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:24,913 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:24,926 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:25,117 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:25,118 INFO L399 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:25,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:25,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1055077100, now seen corresponding path program 21 times [2024-09-15 18:49:25,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:25,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821235342] [2024-09-15 18:49:25,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:25,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:25,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:25,692 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:25,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-15 18:49:25,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:25,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821235342] [2024-09-15 18:49:25,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821235342] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:25,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1363913359] [2024-09-15 18:49:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:49:25,694 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:25,695 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:25,696 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-15 18:49:25,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-15 18:49:25,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:25,786 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-09-15 18:49:25,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:26,215 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:49:26,215 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:27,247 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:49:27,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1363913359] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:27,247 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:27,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 18, 19] total 42 [2024-09-15 18:49:27,248 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322923534] [2024-09-15 18:49:27,248 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:27,248 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-15 18:49:27,248 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:27,248 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-15 18:49:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=1514, Unknown=0, NotChecked=0, Total=1722 [2024-09-15 18:49:27,249 INFO L87 Difference]: Start difference. First operand 443 states and 616 transitions. Second operand has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:31,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:31,973 INFO L93 Difference]: Finished difference Result 683 states and 856 transitions. [2024-09-15 18:49:31,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-09-15 18:49:31,973 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2024-09-15 18:49:31,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:31,976 INFO L225 Difference]: With dead ends: 683 [2024-09-15 18:49:31,976 INFO L226 Difference]: Without dead ends: 656 [2024-09-15 18:49:31,976 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 58 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=469, Invalid=2723, Unknown=0, NotChecked=0, Total=3192 [2024-09-15 18:49:31,977 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 64 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:31,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 124 Invalid, 558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:49:31,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2024-09-15 18:49:32,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 435. [2024-09-15 18:49:32,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 430 states have (on average 1.4023255813953488) internal successors, (603), 430 states have internal predecessors, (603), 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 18:49:32,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 607 transitions. [2024-09-15 18:49:32,372 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 607 transitions. Word has length 38 [2024-09-15 18:49:32,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:32,372 INFO L474 AbstractCegarLoop]: Abstraction has 435 states and 607 transitions. [2024-09-15 18:49:32,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.5714285714285714) internal successors, (66), 40 states have internal predecessors, (66), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:32,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:32,372 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 607 transitions. [2024-09-15 18:49:32,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:49:32,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:32,373 INFO L216 NwaCegarLoop]: trace histogram [10, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:32,387 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2024-09-15 18:49:32,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:32,575 INFO L399 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:32,575 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:32,575 INFO L85 PathProgramCache]: Analyzing trace with hash -909913199, now seen corresponding path program 22 times [2024-09-15 18:49:32,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:32,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019700201] [2024-09-15 18:49:32,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:32,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:32,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:32,755 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:32,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 24 proven. 56 refuted. 0 times theorem prover too weak. 32 trivial. 0 not checked. [2024-09-15 18:49:32,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:32,757 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019700201] [2024-09-15 18:49:32,757 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019700201] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:32,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574936995] [2024-09-15 18:49:32,758 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-15 18:49:32,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:32,758 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:32,759 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:32,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2024-09-15 18:49:32,804 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-15 18:49:32,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:32,805 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-09-15 18:49:32,806 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:32,899 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:49:32,900 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:49:33,412 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-15 18:49:33,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574936995] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:49:33,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:49:33,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 21, 21] total 40 [2024-09-15 18:49:33,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477331828] [2024-09-15 18:49:33,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:49:33,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-15 18:49:33,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:49:33,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-15 18:49:33,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=249, Invalid=1311, Unknown=0, NotChecked=0, Total=1560 [2024-09-15 18:49:33,415 INFO L87 Difference]: Start difference. First operand 435 states and 607 transitions. Second operand has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:58,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:49:58,521 INFO L93 Difference]: Finished difference Result 1307 states and 1617 transitions. [2024-09-15 18:49:58,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 257 states. [2024-09-15 18:49:58,521 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-15 18:49:58,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:49:58,537 INFO L225 Difference]: With dead ends: 1307 [2024-09-15 18:49:58,538 INFO L226 Difference]: Without dead ends: 1196 [2024-09-15 18:49:58,540 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 282 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29981 ImplicationChecksByTransitivity, 21.6s TimeCoverageRelationStatistics Valid=10043, Invalid=70329, Unknown=0, NotChecked=0, Total=80372 [2024-09-15 18:49:58,541 INFO L434 NwaCegarLoop]: 38 mSDtfsCounter, 1251 mSDsluCounter, 673 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1251 SdHoareTripleChecker+Valid, 711 SdHoareTripleChecker+Invalid, 1880 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 719 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:49:58,541 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1251 Valid, 711 Invalid, 1880 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [719 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2024-09-15 18:49:58,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1196 states. [2024-09-15 18:49:58,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1196 to 428. [2024-09-15 18:49:58,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 423 states have (on average 1.364066193853428) internal successors, (577), 423 states have internal predecessors, (577), 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 18:49:58,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 581 transitions. [2024-09-15 18:49:58,930 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 581 transitions. Word has length 39 [2024-09-15 18:49:58,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:49:58,930 INFO L474 AbstractCegarLoop]: Abstraction has 428 states and 581 transitions. [2024-09-15 18:49:58,931 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.325) internal successors, (53), 40 states have internal predecessors, (53), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:49:58,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:58,933 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 581 transitions. [2024-09-15 18:49:58,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-15 18:49:58,934 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:49:58,934 INFO L216 NwaCegarLoop]: trace histogram [16, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:49:58,947 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2024-09-15 18:49:59,138 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:59,139 INFO L399 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:49:59,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:49:59,140 INFO L85 PathProgramCache]: Analyzing trace with hash -966933296, now seen corresponding path program 23 times [2024-09-15 18:49:59,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:49:59,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895031230] [2024-09-15 18:49:59,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:49:59,141 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:49:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:59,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:49:59,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:49:59,481 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:49:59,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:49:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895031230] [2024-09-15 18:49:59,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895031230] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:49:59,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2269063] [2024-09-15 18:49:59,482 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-15 18:49:59,482 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:49:59,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:49:59,484 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:49:59,484 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2024-09-15 18:49:59,554 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2024-09-15 18:49:59,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:49:59,555 INFO L262 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-09-15 18:49:59,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:49:59,593 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:49:59,594 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:00,214 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-15 18:50:00,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2269063] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:00,214 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:00,214 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 45 [2024-09-15 18:50:00,214 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116043114] [2024-09-15 18:50:00,214 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:00,215 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-15 18:50:00,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-15 18:50:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=396, Invalid=1584, Unknown=0, NotChecked=0, Total=1980 [2024-09-15 18:50:00,216 INFO L87 Difference]: Start difference. First operand 428 states and 581 transitions. Second operand has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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 18:50:54,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:54,630 INFO L93 Difference]: Finished difference Result 1630 states and 2224 transitions. [2024-09-15 18:50:54,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 280 states. [2024-09-15 18:50:54,630 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2024-09-15 18:50:54,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:54,634 INFO L225 Difference]: With dead ends: 1630 [2024-09-15 18:50:54,634 INFO L226 Difference]: Without dead ends: 1528 [2024-09-15 18:50:54,637 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 303 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39048 ImplicationChecksByTransitivity, 47.8s TimeCoverageRelationStatistics Valid=19737, Invalid=72983, Unknown=0, NotChecked=0, Total=92720 [2024-09-15 18:50:54,638 INFO L434 NwaCegarLoop]: 75 mSDtfsCounter, 2378 mSDsluCounter, 1490 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 1494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2378 SdHoareTripleChecker+Valid, 1565 SdHoareTripleChecker+Invalid, 3331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1494 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:54,638 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [2378 Valid, 1565 Invalid, 3331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1494 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2024-09-15 18:50:54,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1528 states. [2024-09-15 18:50:55,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1528 to 451. [2024-09-15 18:50:55,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 446 states have (on average 1.3609865470852018) internal successors, (607), 446 states have internal predecessors, (607), 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 18:50:55,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 611 transitions. [2024-09-15 18:50:55,070 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 611 transitions. Word has length 39 [2024-09-15 18:50:55,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:55,070 INFO L474 AbstractCegarLoop]: Abstraction has 451 states and 611 transitions. [2024-09-15 18:50:55,070 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.2444444444444445) internal successors, (56), 45 states have internal predecessors, (56), 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 18:50:55,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:55,070 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 611 transitions. [2024-09-15 18:50:55,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-15 18:50:55,071 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:55,071 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:55,084 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2024-09-15 18:50:55,271 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2024-09-15 18:50:55,272 INFO L399 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:55,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:55,272 INFO L85 PathProgramCache]: Analyzing trace with hash -1123997580, now seen corresponding path program 24 times [2024-09-15 18:50:55,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:55,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48828307] [2024-09-15 18:50:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:55,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:55,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:55,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:50:55,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:50:55,594 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 72 trivial. 0 not checked. [2024-09-15 18:50:55,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:50:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48828307] [2024-09-15 18:50:55,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48828307] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:50:55,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477435732] [2024-09-15 18:50:55,594 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-15 18:50:55,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:50:55,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:50:55,596 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:50:55,597 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2024-09-15 18:50:55,682 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2024-09-15 18:50:55,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:50:55,683 INFO L262 TraceCheckSpWp]: Trace formula consists of 177 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-15 18:50:55,684 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:50:55,921 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-15 18:50:55,921 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:50:56,145 INFO L134 CoverageAnalysis]: Checked inductivity of 111 backedges. 18 proven. 54 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2024-09-15 18:50:56,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477435732] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:50:56,145 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:50:56,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11, 11] total 22 [2024-09-15 18:50:56,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406020868] [2024-09-15 18:50:56,146 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:50:56,146 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-15 18:50:56,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:50:56,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-15 18:50:56,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=331, Unknown=0, NotChecked=0, Total=462 [2024-09-15 18:50:56,148 INFO L87 Difference]: Start difference. First operand 451 states and 611 transitions. Second operand has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 18:50:59,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:50:59,112 INFO L93 Difference]: Finished difference Result 750 states and 1028 transitions. [2024-09-15 18:50:59,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2024-09-15 18:50:59,115 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 40 [2024-09-15 18:50:59,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:50:59,118 INFO L225 Difference]: With dead ends: 750 [2024-09-15 18:50:59,118 INFO L226 Difference]: Without dead ends: 744 [2024-09-15 18:50:59,118 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 64 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=909, Invalid=2061, Unknown=0, NotChecked=0, Total=2970 [2024-09-15 18:50:59,120 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 227 mSDsluCounter, 293 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 174 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 227 SdHoareTripleChecker+Valid, 330 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 174 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-15 18:50:59,120 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [227 Valid, 330 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [174 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-15 18:50:59,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2024-09-15 18:50:59,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 552. [2024-09-15 18:50:59,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 547 states have (on average 1.4021937842778793) internal successors, (767), 547 states have internal predecessors, (767), 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 18:50:59,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 771 transitions. [2024-09-15 18:50:59,738 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 771 transitions. Word has length 40 [2024-09-15 18:50:59,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:50:59,738 INFO L474 AbstractCegarLoop]: Abstraction has 552 states and 771 transitions. [2024-09-15 18:50:59,738 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0) internal successors, (44), 22 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 18:50:59,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:59,738 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 771 transitions. [2024-09-15 18:50:59,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:50:59,739 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:50:59,739 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:50:59,754 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2024-09-15 18:50:59,943 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2024-09-15 18:50:59,943 INFO L399 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:50:59,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:50:59,944 INFO L85 PathProgramCache]: Analyzing trace with hash -996913980, now seen corresponding path program 25 times [2024-09-15 18:50:59,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:50:59,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721083766] [2024-09-15 18:50:59,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:50:59,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:50:59,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:00,716 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:00,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-15 18:51:00,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721083766] [2024-09-15 18:51:00,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721083766] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:00,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770861573] [2024-09-15 18:51:00,718 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-15 18:51:00,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:00,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:00,720 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:00,723 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2024-09-15 18:51:00,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:00,845 WARN L260 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 97 conjuncts are in the unsatisfiable core [2024-09-15 18:51:00,846 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:02,954 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:51:02,954 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 112 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-15 18:51:04,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770861573] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:04,873 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:04,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 34, 26] total 73 [2024-09-15 18:51:04,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599495244] [2024-09-15 18:51:04,873 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:04,873 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2024-09-15 18:51:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2024-09-15 18:51:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=746, Invalid=4510, Unknown=0, NotChecked=0, Total=5256 [2024-09-15 18:51:04,874 INFO L87 Difference]: Start difference. First operand 552 states and 771 transitions. Second operand has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:51:14,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:14,790 INFO L93 Difference]: Finished difference Result 909 states and 1127 transitions. [2024-09-15 18:51:14,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-15 18:51:14,791 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-15 18:51:14,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:14,793 INFO L225 Difference]: With dead ends: 909 [2024-09-15 18:51:14,793 INFO L226 Difference]: Without dead ends: 879 [2024-09-15 18:51:14,798 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3776 ImplicationChecksByTransitivity, 11.0s TimeCoverageRelationStatistics Valid=2257, Invalid=12023, Unknown=0, NotChecked=0, Total=14280 [2024-09-15 18:51:14,798 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 237 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 1258 mSolverCounterSat, 314 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 1572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 314 IncrementalHoareTripleChecker+Valid, 1258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:14,799 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [237 Valid, 245 Invalid, 1572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [314 Valid, 1258 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-15 18:51:14,800 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 879 states. [2024-09-15 18:51:15,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 879 to 543. [2024-09-15 18:51:15,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 538 states have (on average 1.4070631970260223) internal successors, (757), 538 states have internal predecessors, (757), 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 18:51:15,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 761 transitions. [2024-09-15 18:51:15,367 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 761 transitions. Word has length 42 [2024-09-15 18:51:15,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:15,368 INFO L474 AbstractCegarLoop]: Abstraction has 543 states and 761 transitions. [2024-09-15 18:51:15,368 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 1.4027777777777777) internal successors, (101), 71 states have internal predecessors, (101), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-15 18:51:15,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:15,368 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 761 transitions. [2024-09-15 18:51:15,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-15 18:51:15,369 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:15,369 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:15,382 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2024-09-15 18:51:15,573 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2024-09-15 18:51:15,574 INFO L399 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:15,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:15,574 INFO L85 PathProgramCache]: Analyzing trace with hash 880955348, now seen corresponding path program 26 times [2024-09-15 18:51:15,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:15,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517988678] [2024-09-15 18:51:15,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:15,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:15,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:15,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-15 18:51:15,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517988678] [2024-09-15 18:51:15,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517988678] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:15,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481778067] [2024-09-15 18:51:15,777 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-15 18:51:15,777 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:15,777 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:15,779 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:15,779 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2024-09-15 18:51:15,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-15 18:51:15,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-15 18:51:15,825 INFO L262 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-15 18:51:15,826 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-15 18:51:15,914 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2024-09-15 18:51:15,915 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-15 18:51:16,161 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 30 proven. 20 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2024-09-15 18:51:16,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481778067] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-15 18:51:16,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-15 18:51:16,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 12] total 33 [2024-09-15 18:51:16,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344905710] [2024-09-15 18:51:16,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-15 18:51:16,162 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-15 18:51:16,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-15 18:51:16,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-15 18:51:16,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2024-09-15 18:51:16,162 INFO L87 Difference]: Start difference. First operand 543 states and 761 transitions. Second operand has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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 18:51:18,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-15 18:51:18,717 INFO L93 Difference]: Finished difference Result 792 states and 1036 transitions. [2024-09-15 18:51:18,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2024-09-15 18:51:18,718 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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 42 [2024-09-15 18:51:18,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-15 18:51:18,720 INFO L225 Difference]: With dead ends: 792 [2024-09-15 18:51:18,720 INFO L226 Difference]: Without dead ends: 760 [2024-09-15 18:51:18,721 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1071 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=564, Invalid=4548, Unknown=0, NotChecked=0, Total=5112 [2024-09-15 18:51:18,721 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 78 mSDsluCounter, 765 mSDsCounter, 0 mSdLazyCounter, 1213 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 810 SdHoareTripleChecker+Invalid, 1304 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 1213 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-15 18:51:18,721 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [78 Valid, 810 Invalid, 1304 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 1213 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-15 18:51:18,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2024-09-15 18:51:19,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 527. [2024-09-15 18:51:19,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 522 states have (on average 1.4061302681992338) internal successors, (734), 522 states have internal predecessors, (734), 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 18:51:19,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 738 transitions. [2024-09-15 18:51:19,251 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 738 transitions. Word has length 42 [2024-09-15 18:51:19,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-15 18:51:19,251 INFO L474 AbstractCegarLoop]: Abstraction has 527 states and 738 transitions. [2024-09-15 18:51:19,251 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.393939393939394) internal successors, (46), 33 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 18:51:19,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:19,251 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 738 transitions. [2024-09-15 18:51:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-15 18:51:19,252 INFO L208 NwaCegarLoop]: Found error trace [2024-09-15 18:51:19,252 INFO L216 NwaCegarLoop]: trace histogram [17, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-15 18:51:19,264 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2024-09-15 18:51:19,452 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2024-09-15 18:51:19,453 INFO L399 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-15 18:51:19,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-15 18:51:19,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1811734624, now seen corresponding path program 27 times [2024-09-15 18:51:19,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-15 18:51:19,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20438822] [2024-09-15 18:51:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-15 18:51:19,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-15 18:51:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:19,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-15 18:51:19,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-15 18:51:19,784 INFO L134 CoverageAnalysis]: Checked inductivity of 183 backedges. 0 proven. 163 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2024-09-15 18:51:19,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-15 18:51:19,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20438822] [2024-09-15 18:51:19,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20438822] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-15 18:51:19,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062303651] [2024-09-15 18:51:19,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-15 18:51:19,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-15 18:51:19,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-15 18:51:19,788 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-15 18:51:19,790 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process