./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/loops-crafted-1/in-de61.c --full-output --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version f1d7dc9d 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-de61.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 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 --procedureinliner.inline.calls.to.implemented.procedures NEVER --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --witnessprinter.generate.graphml.witnesses false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.dk.referee-eval-f1d7dc9-m [2024-09-20 12:08:20,988 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-20 12:08:21,056 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-20 12:08:21,060 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-20 12:08:21,075 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-20 12:08:21,102 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-20 12:08:21,103 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-20 12:08:21,103 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-20 12:08:21,104 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-20 12:08:21,104 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-20 12:08:21,105 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-20 12:08:21,105 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-20 12:08:21,105 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-20 12:08:21,106 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-20 12:08:21,106 INFO L153 SettingsManager]: * Use SBE=true [2024-09-20 12:08:21,107 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-20 12:08:21,107 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-20 12:08:21,107 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-20 12:08:21,108 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-20 12:08:21,108 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-20 12:08:21,108 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-20 12:08:21,109 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-20 12:08:21,109 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-20 12:08:21,109 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-20 12:08:21,110 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-20 12:08:21,110 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-20 12:08:21,110 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-20 12:08:21,110 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-20 12:08:21,111 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-20 12:08:21,111 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-20 12:08:21,111 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-20 12:08:21,112 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-20 12:08:21,112 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:08:21,112 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-20 12:08:21,113 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-20 12:08:21,113 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-20 12:08:21,113 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-20 12:08:21,114 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-20 12:08:21,114 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-20 12:08:21,114 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-20 12:08:21,114 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-20 12:08:21,116 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-20 12:08:21,116 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 49b7efdcf8f4d6c873493bd370328870547a88b20d287c5de5342268b0966917 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-20 12:08:21,390 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-20 12:08:21,415 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-20 12:08:21,418 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-20 12:08:21,420 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-20 12:08:21,420 INFO L274 PluginConnector]: CDTParser initialized [2024-09-20 12:08:21,421 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-20 12:08:22,918 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-20 12:08:23,122 INFO L384 CDTParser]: Found 1 translation units. [2024-09-20 12:08:23,123 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/loops-crafted-1/in-de61.c [2024-09-20 12:08:23,129 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/2b7c95a59/2f8d23e9c939402ab66bd3493dc06adc/FLAG7c9211807 [2024-09-20 12:08:23,141 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/2b7c95a59/2f8d23e9c939402ab66bd3493dc06adc [2024-09-20 12:08:23,143 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-20 12:08:23,144 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-20 12:08:23,147 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-20 12:08:23,147 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-20 12:08:23,152 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-20 12:08:23,152 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,153 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d6edff and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23, skipping insertion in model container [2024-09-20 12:08:23,153 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,173 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-20 12:08:23,313 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-de61.c[368,381] [2024-09-20 12:08:23,341 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:08:23,357 INFO L200 MainTranslator]: Completed pre-run [2024-09-20 12:08:23,369 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-de61.c[368,381] [2024-09-20 12:08:23,375 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-20 12:08:23,394 INFO L204 MainTranslator]: Completed translation [2024-09-20 12:08:23,394 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23 WrapperNode [2024-09-20 12:08:23,395 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-20 12:08:23,396 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-20 12:08:23,396 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-20 12:08:23,396 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-20 12:08:23,403 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,410 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,417 INFO L138 Inliner]: procedures = 13, calls = 8, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-20 12:08:23,417 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-20 12:08:23,418 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-20 12:08:23,418 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-20 12:08:23,418 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-20 12:08:23,428 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,429 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,430 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,444 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]. [2024-09-20 12:08:23,445 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,445 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,448 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,453 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,454 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,455 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,456 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-20 12:08:23,457 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-20 12:08:23,457 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-20 12:08:23,457 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-20 12:08:23,458 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (1/1) ... [2024-09-20 12:08:23,467 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-20 12:08:23,479 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:23,494 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) [2024-09-20 12:08:23,499 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 [2024-09-20 12:08:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-20 12:08:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-20 12:08:23,546 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-20 12:08:23,546 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-20 12:08:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-20 12:08:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-20 12:08:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-20 12:08:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-20 12:08:23,547 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-20 12:08:23,547 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-20 12:08:23,606 INFO L242 CfgBuilder]: Building ICFG [2024-09-20 12:08:23,609 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-20 12:08:23,758 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-20 12:08:23,758 INFO L291 CfgBuilder]: Performing block encoding [2024-09-20 12:08:23,779 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-20 12:08:23,779 INFO L318 CfgBuilder]: Removed 6 assume(true) statements. [2024-09-20 12:08:23,780 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:08:23 BoogieIcfgContainer [2024-09-20 12:08:23,780 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-20 12:08:23,782 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-20 12:08:23,784 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-20 12:08:23,789 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-20 12:08:23,789 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.09 12:08:23" (1/3) ... [2024-09-20 12:08:23,790 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dbf6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:08:23, skipping insertion in model container [2024-09-20 12:08:23,791 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.09 12:08:23" (2/3) ... [2024-09-20 12:08:23,791 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@55dbf6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.09 12:08:23, skipping insertion in model container [2024-09-20 12:08:23,792 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.09 12:08:23" (3/3) ... [2024-09-20 12:08:23,793 INFO L112 eAbstractionObserver]: Analyzing ICFG in-de61.c [2024-09-20 12:08:23,812 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-20 12:08:23,812 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-20 12:08:23,871 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-20 12:08:23,877 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;@7e0c2422, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-20 12:08:23,877 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-20 12:08:23,882 INFO L276 IsEmpty]: Start isEmpty. Operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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) [2024-09-20 12:08:23,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:08:23,889 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:23,890 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:23,890 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:23,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:23,895 INFO L85 PathProgramCache]: Analyzing trace with hash -294793433, now seen corresponding path program 1 times [2024-09-20 12:08:23,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:23,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073917084] [2024-09-20 12:08:23,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:23,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:23,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:24,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:24,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:24,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:24,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:24,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073917084] [2024-09-20 12:08:24,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073917084] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:08:24,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:08:24,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-20 12:08:24,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884507456] [2024-09-20 12:08:24,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:08:24,057 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-20 12:08:24,057 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:24,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-20 12:08:24,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-20 12:08:24,080 INFO L87 Difference]: Start difference. First operand has 23 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 16 states have internal predecessors, (29), 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 6.0) internal successors, (12), 2 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) [2024-09-20 12:08:24,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:24,108 INFO L93 Difference]: Finished difference Result 40 states and 63 transitions. [2024-09-20 12:08:24,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-20 12:08:24,111 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2024-09-20 12:08:24,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:24,116 INFO L225 Difference]: With dead ends: 40 [2024-09-20 12:08:24,116 INFO L226 Difference]: Without dead ends: 17 [2024-09-20 12:08:24,118 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 [2024-09-20 12:08:24,122 INFO L434 NwaCegarLoop]: 26 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, 26 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 [2024-09-20 12:08:24,123 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 26 Invalid, 2 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:08:24,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-20 12:08:24,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-20 12:08:24,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:24,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 22 transitions. [2024-09-20 12:08:24,152 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 22 transitions. Word has length 16 [2024-09-20 12:08:24,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:24,153 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 22 transitions. [2024-09-20 12:08:24,153 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2024-09-20 12:08:24,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:24,154 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 22 transitions. [2024-09-20 12:08:24,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2024-09-20 12:08:24,155 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:24,155 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:24,155 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-20 12:08:24,156 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:24,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:24,156 INFO L85 PathProgramCache]: Analyzing trace with hash -951970017, now seen corresponding path program 1 times [2024-09-20 12:08:24,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:24,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506335521] [2024-09-20 12:08:24,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:24,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:24,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:24,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:24,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:24,843 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:24,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506335521] [2024-09-20 12:08:24,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506335521] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-20 12:08:24,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-20 12:08:24,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-09-20 12:08:24,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921173881] [2024-09-20 12:08:24,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-20 12:08:24,846 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-20 12:08:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:24,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-20 12:08:24,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-09-20 12:08:24,850 INFO L87 Difference]: Start difference. First operand 17 states and 22 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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) [2024-09-20 12:08:24,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:24,992 INFO L93 Difference]: Finished difference Result 37 states and 52 transitions. [2024-09-20 12:08:24,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-20 12:08:24,993 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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 [2024-09-20 12:08:24,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:24,994 INFO L225 Difference]: With dead ends: 37 [2024-09-20 12:08:24,994 INFO L226 Difference]: Without dead ends: 18 [2024-09-20 12:08:24,995 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-20 12:08:24,996 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 14 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:24,997 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 60 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:08:24,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-20 12:08:25,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-20 12:08:25,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 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) [2024-09-20 12:08:25,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 23 transitions. [2024-09-20 12:08:25,008 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 23 transitions. Word has length 16 [2024-09-20 12:08:25,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:25,008 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 23 transitions. [2024-09-20 12:08:25,009 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 7 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) [2024-09-20 12:08:25,009 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:25,010 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 23 transitions. [2024-09-20 12:08:25,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2024-09-20 12:08:25,011 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:25,012 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:25,012 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-20 12:08:25,013 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:25,013 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:25,013 INFO L85 PathProgramCache]: Analyzing trace with hash -713894869, now seen corresponding path program 1 times [2024-09-20 12:08:25,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:25,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775133139] [2024-09-20 12:08:25,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:25,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:25,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:25,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,152 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:25,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775133139] [2024-09-20 12:08:25,153 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775133139] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:25,153 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205429955] [2024-09-20 12:08:25,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:25,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:25,156 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:25,158 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) [2024-09-20 12:08:25,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-20 12:08:25,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,204 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-09-20 12:08:25,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:25,236 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:25,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:25,298 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:25,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205429955] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:25,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:25,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 9 [2024-09-20 12:08:25,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014189312] [2024-09-20 12:08:25,299 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:25,299 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-09-20 12:08:25,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:25,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-09-20 12:08:25,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-09-20 12:08:25,302 INFO L87 Difference]: Start difference. First operand 18 states and 23 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:25,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:25,479 INFO L93 Difference]: Finished difference Result 59 states and 96 transitions. [2024-09-20 12:08:25,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-20 12:08:25,480 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2024-09-20 12:08:25,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:25,482 INFO L225 Difference]: With dead ends: 59 [2024-09-20 12:08:25,482 INFO L226 Difference]: Without dead ends: 50 [2024-09-20 12:08:25,483 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2024-09-20 12:08:25,484 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 48 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:25,484 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 78 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:08:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-20 12:08:25,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2024-09-20 12:08:25,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 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) [2024-09-20 12:08:25,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 59 transitions. [2024-09-20 12:08:25,494 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 59 transitions. Word has length 17 [2024-09-20 12:08:25,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:25,494 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 59 transitions. [2024-09-20 12:08:25,494 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:25,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:25,495 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 59 transitions. [2024-09-20 12:08:25,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-20 12:08:25,495 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:25,495 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:25,515 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:25,699 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 [2024-09-20 12:08:25,700 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:25,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:25,701 INFO L85 PathProgramCache]: Analyzing trace with hash 49422170, now seen corresponding path program 1 times [2024-09-20 12:08:25,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:25,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [869950524] [2024-09-20 12:08:25,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:25,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,841 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,850 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [869950524] [2024-09-20 12:08:25,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [869950524] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:25,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391827116] [2024-09-20 12:08:25,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:25,856 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) [2024-09-20 12:08:25,857 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-20 12:08:25,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:25,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-09-20 12:08:25,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:25,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:25,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:26,025 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:26,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391827116] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:26,026 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:26,026 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 11 [2024-09-20 12:08:26,026 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069119224] [2024-09-20 12:08:26,027 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:26,027 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-20 12:08:26,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:26,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-20 12:08:26,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-09-20 12:08:26,028 INFO L87 Difference]: Start difference. First operand 41 states and 59 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:26,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:26,569 INFO L93 Difference]: Finished difference Result 108 states and 170 transitions. [2024-09-20 12:08:26,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-09-20 12:08:26,570 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2024-09-20 12:08:26,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:26,572 INFO L225 Difference]: With dead ends: 108 [2024-09-20 12:08:26,572 INFO L226 Difference]: Without dead ends: 87 [2024-09-20 12:08:26,573 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=665, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:08:26,573 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 86 mSDsluCounter, 88 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:26,574 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 101 Invalid, 240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:08:26,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2024-09-20 12:08:26,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 56. [2024-09-20 12:08:26,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 51 states have (on average 1.4509803921568627) internal successors, (74), 51 states have internal predecessors, (74), 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) [2024-09-20 12:08:26,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 78 transitions. [2024-09-20 12:08:26,594 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 78 transitions. Word has length 19 [2024-09-20 12:08:26,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:26,595 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 78 transitions. [2024-09-20 12:08:26,595 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 11 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:26,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:26,596 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 78 transitions. [2024-09-20 12:08:26,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 12:08:26,597 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:26,597 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:26,615 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-20 12:08:26,797 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:26,798 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:26,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:26,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1324513826, now seen corresponding path program 1 times [2024-09-20 12:08:26,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:26,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663951879] [2024-09-20 12:08:26,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:26,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:26,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:26,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:26,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:08:26,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663951879] [2024-09-20 12:08:26,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663951879] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:26,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127145963] [2024-09-20 12:08:26,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:26,889 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:26,890 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:26,892 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) [2024-09-20 12:08:26,897 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-20 12:08:26,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:26,937 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 12:08:26,939 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:27,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:08:27,068 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:27,231 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-20 12:08:27,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127145963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:27,232 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:27,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 8, 8] total 15 [2024-09-20 12:08:27,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425983385] [2024-09-20 12:08:27,232 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:27,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:08:27,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:27,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:08:27,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:08:27,233 INFO L87 Difference]: Start difference. First operand 56 states and 78 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:27,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:27,403 INFO L93 Difference]: Finished difference Result 90 states and 132 transitions. [2024-09-20 12:08:27,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:08:27,404 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 12:08:27,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:27,405 INFO L225 Difference]: With dead ends: 90 [2024-09-20 12:08:27,405 INFO L226 Difference]: Without dead ends: 79 [2024-09-20 12:08:27,406 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-09-20 12:08:27,407 INFO L434 NwaCegarLoop]: 24 mSDtfsCounter, 24 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:27,407 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 197 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:08:27,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2024-09-20 12:08:27,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2024-09-20 12:08:27,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 58 states have (on average 1.4827586206896552) internal successors, (86), 58 states have internal predecessors, (86), 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) [2024-09-20 12:08:27,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 90 transitions. [2024-09-20 12:08:27,429 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 90 transitions. Word has length 20 [2024-09-20 12:08:27,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:27,430 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 90 transitions. [2024-09-20 12:08:27,430 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 13 states have internal predecessors, (43), 4 states have call successors, (5), 4 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:27,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:27,431 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 90 transitions. [2024-09-20 12:08:27,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2024-09-20 12:08:27,431 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:27,432 INFO L216 NwaCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:27,449 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-20 12:08:27,633 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:27,634 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:27,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash 739179039, now seen corresponding path program 2 times [2024-09-20 12:08:27,634 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:27,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764508455] [2024-09-20 12:08:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:27,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:27,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:27,750 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:27,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:27,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:27,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:27,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764508455] [2024-09-20 12:08:27,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764508455] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:27,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250971358] [2024-09-20 12:08:27,756 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:08:27,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:27,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:27,760 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) [2024-09-20 12:08:27,763 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-20 12:08:27,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:08:27,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:27,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-20 12:08:27,809 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:27,841 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:27,842 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:27,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:27,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [250971358] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:27,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:27,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-09-20 12:08:27,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206997731] [2024-09-20 12:08:27,937 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:27,937 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:08:27,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:27,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:08:27,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:08:27,938 INFO L87 Difference]: Start difference. First operand 63 states and 90 transitions. Second operand has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:28,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:28,698 INFO L93 Difference]: Finished difference Result 221 states and 363 transitions. [2024-09-20 12:08:28,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:08:28,699 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2024-09-20 12:08:28,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:28,701 INFO L225 Difference]: With dead ends: 221 [2024-09-20 12:08:28,701 INFO L226 Difference]: Without dead ends: 196 [2024-09-20 12:08:28,702 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=301, Invalid=691, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:08:28,704 INFO L434 NwaCegarLoop]: 31 mSDtfsCounter, 282 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 370 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:28,704 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [282 Valid, 201 Invalid, 370 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:08:28,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2024-09-20 12:08:28,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 123. [2024-09-20 12:08:28,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 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) [2024-09-20 12:08:28,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 184 transitions. [2024-09-20 12:08:28,751 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 184 transitions. Word has length 20 [2024-09-20 12:08:28,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:28,752 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 184 transitions. [2024-09-20 12:08:28,752 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.7333333333333334) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:28,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:28,752 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 184 transitions. [2024-09-20 12:08:28,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:08:28,754 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:28,754 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:28,771 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:28,954 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:28,955 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:28,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:28,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1756794400, now seen corresponding path program 1 times [2024-09-20 12:08:28,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:28,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102819049] [2024-09-20 12:08:28,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:28,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:28,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:29,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:29,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:08:29,275 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102819049] [2024-09-20 12:08:29,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102819049] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:29,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217534922] [2024-09-20 12:08:29,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:29,276 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:29,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:29,278 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) [2024-09-20 12:08:29,280 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-20 12:08:29,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:29,329 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-09-20 12:08:29,330 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:29,516 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:08:29,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:29,666 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-20 12:08:29,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217534922] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:29,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:29,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 20 [2024-09-20 12:08:29,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537664739] [2024-09-20 12:08:29,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:29,667 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-20 12:08:29,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:29,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-20 12:08:29,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-09-20 12:08:29,669 INFO L87 Difference]: Start difference. First operand 123 states and 184 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:30,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:30,465 INFO L93 Difference]: Finished difference Result 167 states and 242 transitions. [2024-09-20 12:08:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-20 12:08:30,469 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2024-09-20 12:08:30,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:30,470 INFO L225 Difference]: With dead ends: 167 [2024-09-20 12:08:30,470 INFO L226 Difference]: Without dead ends: 158 [2024-09-20 12:08:30,471 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=213, Invalid=1047, Unknown=0, NotChecked=0, Total=1260 [2024-09-20 12:08:30,471 INFO L434 NwaCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 356 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:30,472 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 134 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:08:30,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2024-09-20 12:08:30,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 123. [2024-09-20 12:08:30,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 118 states have (on average 1.5254237288135593) internal successors, (180), 118 states have internal predecessors, (180), 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) [2024-09-20 12:08:30,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 184 transitions. [2024-09-20 12:08:30,528 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 184 transitions. Word has length 22 [2024-09-20 12:08:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:30,529 INFO L474 AbstractCegarLoop]: Abstraction has 123 states and 184 transitions. [2024-09-20 12:08:30,529 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 18 states have internal predecessors, (46), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:30,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:30,530 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 184 transitions. [2024-09-20 12:08:30,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-09-20 12:08:30,531 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:30,531 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:30,551 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-20 12:08:30,731 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-20 12:08:30,732 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:30,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:30,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1941599551, now seen corresponding path program 2 times [2024-09-20 12:08:30,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:30,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950340212] [2024-09-20 12:08:30,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:30,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:30,859 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:30,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:30,863 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950340212] [2024-09-20 12:08:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950340212] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927049418] [2024-09-20 12:08:30,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:08:30,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:30,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:30,865 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) [2024-09-20 12:08:30,867 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-20 12:08:30,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:08:30,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:30,907 INFO L262 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-20 12:08:30,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:30,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:08:30,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:31,035 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:08:31,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927049418] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:31,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:31,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5, 5] total 12 [2024-09-20 12:08:31,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235960415] [2024-09-20 12:08:31,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:31,036 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 12:08:31,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:31,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 12:08:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:08:31,037 INFO L87 Difference]: Start difference. First operand 123 states and 184 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) [2024-09-20 12:08:31,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:31,864 INFO L93 Difference]: Finished difference Result 302 states and 459 transitions. [2024-09-20 12:08:31,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-20 12:08:31,864 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 22 [2024-09-20 12:08:31,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:31,866 INFO L225 Difference]: With dead ends: 302 [2024-09-20 12:08:31,866 INFO L226 Difference]: Without dead ends: 263 [2024-09-20 12:08:31,868 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 42 SyntacticMatches, 4 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 454 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=253, Invalid=1553, Unknown=0, NotChecked=0, Total=1806 [2024-09-20 12:08:31,868 INFO L434 NwaCegarLoop]: 18 mSDtfsCounter, 123 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 328 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:31,869 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [123 Valid, 137 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 328 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-20 12:08:31,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2024-09-20 12:08:31,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 154. [2024-09-20 12:08:31,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.4966442953020134) internal successors, (223), 149 states have internal predecessors, (223), 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) [2024-09-20 12:08:31,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 227 transitions. [2024-09-20 12:08:31,925 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 227 transitions. Word has length 22 [2024-09-20 12:08:31,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:31,925 INFO L474 AbstractCegarLoop]: Abstraction has 154 states and 227 transitions. [2024-09-20 12:08:31,925 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) [2024-09-20 12:08:31,926 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:31,926 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 227 transitions. [2024-09-20 12:08:31,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2024-09-20 12:08:31,930 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:31,930 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:31,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-20 12:08:32,131 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:32,131 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:32,132 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:32,132 INFO L85 PathProgramCache]: Analyzing trace with hash -46385954, now seen corresponding path program 2 times [2024-09-20 12:08:32,132 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:32,132 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085217600] [2024-09-20 12:08:32,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:32,132 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:32,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:32,211 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:32,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:32,214 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:08:32,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:32,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085217600] [2024-09-20 12:08:32,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085217600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:32,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769724588] [2024-09-20 12:08:32,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:08:32,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:32,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:32,217 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) [2024-09-20 12:08:32,220 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-20 12:08:32,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:08:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:32,264 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:08:32,266 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:32,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:08:32,287 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:32,315 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:08:32,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769724588] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:32,316 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:32,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 4 [2024-09-20 12:08:32,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840282737] [2024-09-20 12:08:32,316 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:32,317 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-20 12:08:32,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:32,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-20 12:08:32,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:08:32,317 INFO L87 Difference]: Start difference. First operand 154 states and 227 transitions. Second operand has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-09-20 12:08:32,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:32,404 INFO L93 Difference]: Finished difference Result 242 states and 361 transitions. [2024-09-20 12:08:32,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-20 12:08:32,404 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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 24 [2024-09-20 12:08:32,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:32,410 INFO L225 Difference]: With dead ends: 242 [2024-09-20 12:08:32,412 INFO L226 Difference]: Without dead ends: 181 [2024-09-20 12:08:32,416 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-20 12:08:32,417 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 9 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 26 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:32,417 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 60 Invalid, 26 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:08:32,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2024-09-20 12:08:32,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 151. [2024-09-20 12:08:32,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.4726027397260273) internal successors, (215), 146 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) [2024-09-20 12:08:32,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 219 transitions. [2024-09-20 12:08:32,473 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 219 transitions. Word has length 24 [2024-09-20 12:08:32,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:32,473 INFO L474 AbstractCegarLoop]: Abstraction has 151 states and 219 transitions. [2024-09-20 12:08:32,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.75) internal successors, (19), 4 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) [2024-09-20 12:08:32,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:32,474 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 219 transitions. [2024-09-20 12:08:32,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:08:32,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:32,475 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:32,493 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:32,676 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:32,677 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:32,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:32,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1697264410, now seen corresponding path program 1 times [2024-09-20 12:08:32,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:32,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508049824] [2024-09-20 12:08:32,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:32,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:32,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:32,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:32,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:32,779 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:08:32,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508049824] [2024-09-20 12:08:32,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508049824] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:32,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635947203] [2024-09-20 12:08:32,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:32,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:32,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:32,782 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) [2024-09-20 12:08:32,784 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-20 12:08:32,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:32,829 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 12:08:32,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:32,863 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:08:32,864 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:32,937 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-09-20 12:08:32,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635947203] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:32,937 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:32,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 6] total 14 [2024-09-20 12:08:32,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321224566] [2024-09-20 12:08:32,938 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:32,938 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 12:08:32,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:32,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 12:08:32,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2024-09-20 12:08:32,939 INFO L87 Difference]: Start difference. First operand 151 states and 219 transitions. Second operand has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2024-09-20 12:08:33,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:33,339 INFO L93 Difference]: Finished difference Result 222 states and 323 transitions. [2024-09-20 12:08:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-20 12:08:33,340 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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 25 [2024-09-20 12:08:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:33,341 INFO L225 Difference]: With dead ends: 222 [2024-09-20 12:08:33,341 INFO L226 Difference]: Without dead ends: 180 [2024-09-20 12:08:33,342 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:08:33,342 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 46 mSDsluCounter, 166 mSDsCounter, 0 mSdLazyCounter, 341 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 46 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:33,343 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [46 Valid, 191 Invalid, 389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 341 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-20 12:08:33,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2024-09-20 12:08:33,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 147. [2024-09-20 12:08:33,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 142 states have (on average 1.471830985915493) internal successors, (209), 142 states have internal predecessors, (209), 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) [2024-09-20 12:08:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 213 transitions. [2024-09-20 12:08:33,395 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 213 transitions. Word has length 25 [2024-09-20 12:08:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:33,396 INFO L474 AbstractCegarLoop]: Abstraction has 147 states and 213 transitions. [2024-09-20 12:08:33,396 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.142857142857143) internal successors, (30), 14 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) [2024-09-20 12:08:33,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 213 transitions. [2024-09-20 12:08:33,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-20 12:08:33,399 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:33,399 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:33,417 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:33,600 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:33,600 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:33,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:33,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1008778426, now seen corresponding path program 3 times [2024-09-20 12:08:33,601 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:33,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520456531] [2024-09-20 12:08:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:33,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:33,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:33,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:33,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:33,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520456531] [2024-09-20 12:08:33,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520456531] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:33,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252328475] [2024-09-20 12:08:33,751 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:08:33,751 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:33,751 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:33,753 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) [2024-09-20 12:08:33,754 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-20 12:08:33,797 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:08:33,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:33,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-20 12:08:33,799 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:33,878 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:08:33,879 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:33,977 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:08:33,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252328475] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:33,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:33,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6, 6] total 15 [2024-09-20 12:08:33,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532505446] [2024-09-20 12:08:33,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:33,979 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-20 12:08:33,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:33,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-20 12:08:33,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2024-09-20 12:08:33,980 INFO L87 Difference]: Start difference. First operand 147 states and 213 transitions. Second operand has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:35,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:35,334 INFO L93 Difference]: Finished difference Result 356 states and 535 transitions. [2024-09-20 12:08:35,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2024-09-20 12:08:35,334 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2024-09-20 12:08:35,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:35,336 INFO L225 Difference]: With dead ends: 356 [2024-09-20 12:08:35,336 INFO L226 Difference]: Without dead ends: 319 [2024-09-20 12:08:35,338 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 46 SyntacticMatches, 6 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=524, Invalid=4446, Unknown=0, NotChecked=0, Total=4970 [2024-09-20 12:08:35,338 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 164 mSDsluCounter, 219 mSDsCounter, 0 mSdLazyCounter, 736 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:35,339 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [164 Valid, 245 Invalid, 866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 736 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:08:35,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2024-09-20 12:08:35,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 171. [2024-09-20 12:08:35,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 166 states have (on average 1.4759036144578312) internal successors, (245), 166 states have internal predecessors, (245), 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) [2024-09-20 12:08:35,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 249 transitions. [2024-09-20 12:08:35,394 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 249 transitions. Word has length 25 [2024-09-20 12:08:35,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:35,394 INFO L474 AbstractCegarLoop]: Abstraction has 171 states and 249 transitions. [2024-09-20 12:08:35,395 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 15 states have internal predecessors, (35), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:35,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 249 transitions. [2024-09-20 12:08:35,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:08:35,396 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:35,396 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:35,410 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-20 12:08:35,597 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-20 12:08:35,597 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:35,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:35,598 INFO L85 PathProgramCache]: Analyzing trace with hash 1467722815, now seen corresponding path program 3 times [2024-09-20 12:08:35,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:35,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273400709] [2024-09-20 12:08:35,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:35,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:35,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:35,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:35,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:35,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:08:35,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:35,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273400709] [2024-09-20 12:08:35,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273400709] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:35,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789555592] [2024-09-20 12:08:35,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:08:35,687 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:35,687 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:35,689 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) [2024-09-20 12:08:35,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-20 12:08:35,747 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-09-20 12:08:35,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:35,749 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-20 12:08:35,750 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:35,783 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:08:35,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:35,825 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-09-20 12:08:35,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789555592] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:35,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:35,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 5 [2024-09-20 12:08:35,826 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541580948] [2024-09-20 12:08:35,826 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:35,826 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-20 12:08:35,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:35,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-20 12:08:35,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-20 12:08:35,827 INFO L87 Difference]: Start difference. First operand 171 states and 249 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:35,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:35,978 INFO L93 Difference]: Finished difference Result 259 states and 367 transitions. [2024-09-20 12:08:35,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-20 12:08:35,979 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 12:08:35,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:35,980 INFO L225 Difference]: With dead ends: 259 [2024-09-20 12:08:35,980 INFO L226 Difference]: Without dead ends: 247 [2024-09-20 12:08:35,981 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 50 SyntacticMatches, 6 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-09-20 12:08:35,981 INFO L434 NwaCegarLoop]: 28 mSDtfsCounter, 18 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:35,982 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 84 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-20 12:08:35,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2024-09-20 12:08:36,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 186. [2024-09-20 12:08:36,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 181 states have (on average 1.4475138121546962) internal successors, (262), 181 states have internal predecessors, (262), 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) [2024-09-20 12:08:36,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 266 transitions. [2024-09-20 12:08:36,050 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 266 transitions. Word has length 26 [2024-09-20 12:08:36,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:36,050 INFO L474 AbstractCegarLoop]: Abstraction has 186 states and 266 transitions. [2024-09-20 12:08:36,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 5 states have internal predecessors, (20), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:36,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:36,051 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 266 transitions. [2024-09-20 12:08:36,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2024-09-20 12:08:36,052 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:36,052 INFO L216 NwaCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:36,069 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:36,256 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-09-20 12:08:36,257 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:36,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:36,257 INFO L85 PathProgramCache]: Analyzing trace with hash 722284832, now seen corresponding path program 4 times [2024-09-20 12:08:36,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:36,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366459914] [2024-09-20 12:08:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:36,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:36,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:36,365 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:36,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:36,368 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:08:36,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:36,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366459914] [2024-09-20 12:08:36,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366459914] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:36,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456965695] [2024-09-20 12:08:36,369 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:08:36,369 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:36,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:36,370 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) [2024-09-20 12:08:36,371 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-20 12:08:36,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:08:36,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:36,414 INFO L262 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-09-20 12:08:36,416 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:36,435 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:08:36,435 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:36,536 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:08:36,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456965695] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:36,537 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:36,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 19 [2024-09-20 12:08:36,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235235965] [2024-09-20 12:08:36,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:36,537 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-20 12:08:36,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:36,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-20 12:08:36,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2024-09-20 12:08:36,538 INFO L87 Difference]: Start difference. First operand 186 states and 266 transitions. Second operand has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:38,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:38,283 INFO L93 Difference]: Finished difference Result 454 states and 704 transitions. [2024-09-20 12:08:38,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2024-09-20 12:08:38,284 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2024-09-20 12:08:38,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:38,286 INFO L225 Difference]: With dead ends: 454 [2024-09-20 12:08:38,286 INFO L226 Difference]: Without dead ends: 382 [2024-09-20 12:08:38,288 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1552 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1233, Invalid=3597, Unknown=0, NotChecked=0, Total=4830 [2024-09-20 12:08:38,289 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 427 mSDsluCounter, 266 mSDsCounter, 0 mSdLazyCounter, 518 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 518 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:38,289 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [427 Valid, 303 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 518 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-20 12:08:38,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2024-09-20 12:08:38,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 236. [2024-09-20 12:08:38,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 231 states have (on average 1.4761904761904763) internal successors, (341), 231 states have internal predecessors, (341), 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) [2024-09-20 12:08:38,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 345 transitions. [2024-09-20 12:08:38,372 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 345 transitions. Word has length 26 [2024-09-20 12:08:38,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:38,372 INFO L474 AbstractCegarLoop]: Abstraction has 236 states and 345 transitions. [2024-09-20 12:08:38,372 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:38,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:38,373 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 345 transitions. [2024-09-20 12:08:38,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-20 12:08:38,373 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:38,373 INFO L216 NwaCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:38,387 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:38,574 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:38,574 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:38,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:38,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1716429653, now seen corresponding path program 3 times [2024-09-20 12:08:38,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:38,575 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576182570] [2024-09-20 12:08:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:38,575 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:38,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:38,779 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:38,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:38,782 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:38,784 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576182570] [2024-09-20 12:08:38,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576182570] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:38,784 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103452902] [2024-09-20 12:08:38,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:08:38,784 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:38,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:38,786 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) [2024-09-20 12:08:38,787 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-20 12:08:38,835 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2024-09-20 12:08:38,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:38,837 INFO L262 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-09-20 12:08:38,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:38,876 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:38,876 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:39,129 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:39,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103452902] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:39,129 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:39,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 29 [2024-09-20 12:08:39,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833878581] [2024-09-20 12:08:39,129 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:39,130 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-20 12:08:39,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:39,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-20 12:08:39,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=611, Unknown=0, NotChecked=0, Total=812 [2024-09-20 12:08:39,131 INFO L87 Difference]: Start difference. First operand 236 states and 345 transitions. Second operand has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:43,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:43,119 INFO L93 Difference]: Finished difference Result 821 states and 1318 transitions. [2024-09-20 12:08:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2024-09-20 12:08:43,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 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 [2024-09-20 12:08:43,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:43,122 INFO L225 Difference]: With dead ends: 821 [2024-09-20 12:08:43,123 INFO L226 Difference]: Without dead ends: 764 [2024-09-20 12:08:43,124 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=1624, Invalid=3632, Unknown=0, NotChecked=0, Total=5256 [2024-09-20 12:08:43,124 INFO L434 NwaCegarLoop]: 64 mSDtfsCounter, 1322 mSDsluCounter, 801 mSDsCounter, 0 mSdLazyCounter, 1091 mSolverCounterSat, 684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1322 SdHoareTripleChecker+Valid, 865 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 684 IncrementalHoareTripleChecker+Valid, 1091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:43,125 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1322 Valid, 865 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [684 Valid, 1091 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2024-09-20 12:08:43,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2024-09-20 12:08:43,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 380. [2024-09-20 12:08:43,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 380 states, 375 states have (on average 1.5066666666666666) internal successors, (565), 375 states have internal predecessors, (565), 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) [2024-09-20 12:08:43,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 380 states to 380 states and 569 transitions. [2024-09-20 12:08:43,297 INFO L78 Accepts]: Start accepts. Automaton has 380 states and 569 transitions. Word has length 27 [2024-09-20 12:08:43,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:43,297 INFO L474 AbstractCegarLoop]: Abstraction has 380 states and 569 transitions. [2024-09-20 12:08:43,298 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.3793103448275863) internal successors, (40), 29 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:43,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:43,298 INFO L276 IsEmpty]: Start isEmpty. Operand 380 states and 569 transitions. [2024-09-20 12:08:43,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:08:43,299 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:43,299 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:43,315 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:43,503 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-20 12:08:43,504 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:43,504 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:43,504 INFO L85 PathProgramCache]: Analyzing trace with hash 216651583, now seen corresponding path program 5 times [2024-09-20 12:08:43,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:43,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882560567] [2024-09-20 12:08:43,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:43,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:43,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:43,902 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:43,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:43,904 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:08:43,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:43,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882560567] [2024-09-20 12:08:43,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882560567] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:43,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229660546] [2024-09-20 12:08:43,905 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:08:43,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:43,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:43,907 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) [2024-09-20 12:08:43,910 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-20 12:08:43,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:08:43,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:43,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 50 conjuncts are in the unsatisfiable core [2024-09-20 12:08:43,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:44,502 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:44,502 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:44,946 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-20 12:08:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229660546] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:44,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 17, 14] total 31 [2024-09-20 12:08:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149087195] [2024-09-20 12:08:44,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:44,947 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:08:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:08:44,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=792, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:08:44,948 INFO L87 Difference]: Start difference. First operand 380 states and 569 transitions. Second operand has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 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) [2024-09-20 12:08:49,040 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 [] [2024-09-20 12:08:52,354 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.54s for a HTC check with result INVALID. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:08:52,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:52,820 INFO L93 Difference]: Finished difference Result 528 states and 742 transitions. [2024-09-20 12:08:52,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-09-20 12:08:52,821 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 3 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2024-09-20 12:08:52,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:52,823 INFO L225 Difference]: With dead ends: 528 [2024-09-20 12:08:52,824 INFO L226 Difference]: Without dead ends: 434 [2024-09-20 12:08:52,825 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 41 SyntacticMatches, 4 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=292, Invalid=1778, Unknown=0, NotChecked=0, Total=2070 [2024-09-20 12:08:52,825 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 35 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 631 mSolverCounterSat, 30 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 215 SdHoareTripleChecker+Invalid, 662 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 631 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:52,825 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 215 Invalid, 662 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 631 Invalid, 1 Unknown, 0 Unchecked, 6.5s Time] [2024-09-20 12:08:52,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2024-09-20 12:08:52,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 358. [2024-09-20 12:08:52,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 353 states have (on average 1.4844192634560907) internal successors, (524), 353 states have internal predecessors, (524), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:53,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 528 transitions. [2024-09-20 12:08:53,002 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 528 transitions. Word has length 28 [2024-09-20 12:08:53,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:53,002 INFO L474 AbstractCegarLoop]: Abstraction has 358 states and 528 transitions. [2024-09-20 12:08:53,002 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8064516129032258) internal successors, (56), 29 states have internal predecessors, (56), 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) [2024-09-20 12:08:53,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:53,003 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 528 transitions. [2024-09-20 12:08:53,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2024-09-20 12:08:53,004 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:53,004 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:53,022 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-20 12:08:53,204 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-20 12:08:53,205 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:53,205 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:53,205 INFO L85 PathProgramCache]: Analyzing trace with hash 302553951, now seen corresponding path program 4 times [2024-09-20 12:08:53,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:53,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019287357] [2024-09-20 12:08:53,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:53,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:53,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:53,383 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:53,385 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:53,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019287357] [2024-09-20 12:08:53,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1019287357] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:53,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503517158] [2024-09-20 12:08:53,387 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:08:53,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:53,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:53,388 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) [2024-09-20 12:08:53,390 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-20 12:08:53,433 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:08:53,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:53,438 INFO L262 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-20 12:08:53,439 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:53,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 12:08:53,565 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 12:08:53,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503517158] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:53,736 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:53,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7, 7] total 18 [2024-09-20 12:08:53,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5604917] [2024-09-20 12:08:53,736 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:53,736 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-20 12:08:53,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:53,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-20 12:08:53,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=272, Unknown=0, NotChecked=0, Total=306 [2024-09-20 12:08:53,737 INFO L87 Difference]: Start difference. First operand 358 states and 528 transitions. Second operand has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:56,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:56,969 INFO L93 Difference]: Finished difference Result 865 states and 1290 transitions. [2024-09-20 12:08:56,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-20 12:08:56,969 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 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 [2024-09-20 12:08:56,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:56,974 INFO L225 Difference]: With dead ends: 865 [2024-09-20 12:08:56,974 INFO L226 Difference]: Without dead ends: 793 [2024-09-20 12:08:56,977 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 50 SyntacticMatches, 8 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3724 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=926, Invalid=9994, Unknown=0, NotChecked=0, Total=10920 [2024-09-20 12:08:56,977 INFO L434 NwaCegarLoop]: 30 mSDtfsCounter, 271 mSDsluCounter, 297 mSDsCounter, 0 mSdLazyCounter, 1241 mSolverCounterSat, 267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 267 IncrementalHoareTripleChecker+Valid, 1241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:56,977 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [271 Valid, 327 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [267 Valid, 1241 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:08:56,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2024-09-20 12:08:57,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 410. [2024-09-20 12:08:57,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 410 states, 405 states have (on average 1.4987654320987653) internal successors, (607), 405 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) [2024-09-20 12:08:57,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 410 states to 410 states and 611 transitions. [2024-09-20 12:08:57,221 INFO L78 Accepts]: Start accepts. Automaton has 410 states and 611 transitions. Word has length 28 [2024-09-20 12:08:57,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:57,222 INFO L474 AbstractCegarLoop]: Abstraction has 410 states and 611 transitions. [2024-09-20 12:08:57,222 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2222222222222223) internal successors, (40), 18 states have internal predecessors, (40), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:57,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:57,222 INFO L276 IsEmpty]: Start isEmpty. Operand 410 states and 611 transitions. [2024-09-20 12:08:57,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-09-20 12:08:57,223 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:57,223 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:57,241 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-20 12:08:57,424 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-20 12:08:57,424 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:57,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:57,424 INFO L85 PathProgramCache]: Analyzing trace with hash 997958656, now seen corresponding path program 6 times [2024-09-20 12:08:57,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:57,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471647852] [2024-09-20 12:08:57,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:57,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:57,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:57,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:57,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2024-09-20 12:08:57,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:57,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471647852] [2024-09-20 12:08:57,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471647852] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:57,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852100162] [2024-09-20 12:08:57,591 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:08:57,592 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:57,592 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:57,594 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) [2024-09-20 12:08:57,596 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-20 12:08:57,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-20 12:08:57,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:57,647 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 12:08:57,648 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-20 12:08:57,697 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-09-20 12:08:57,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852100162] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:57,769 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:57,769 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 6, 6] total 12 [2024-09-20 12:08:57,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447193503] [2024-09-20 12:08:57,770 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:57,770 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-20 12:08:57,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:57,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-20 12:08:57,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-20 12:08:57,771 INFO L87 Difference]: Start difference. First operand 410 states and 611 transitions. Second operand has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:58,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:08:58,310 INFO L93 Difference]: Finished difference Result 672 states and 978 transitions. [2024-09-20 12:08:58,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-20 12:08:58,311 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2024-09-20 12:08:58,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:08:58,314 INFO L225 Difference]: With dead ends: 672 [2024-09-20 12:08:58,314 INFO L226 Difference]: Without dead ends: 642 [2024-09-20 12:08:58,315 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 53 SyntacticMatches, 7 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2024-09-20 12:08:58,315 INFO L434 NwaCegarLoop]: 37 mSDtfsCounter, 61 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 113 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-20 12:08:58,315 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [61 Valid, 165 Invalid, 113 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-20 12:08:58,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 642 states. [2024-09-20 12:08:58,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 642 to 413. [2024-09-20 12:08:58,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 408 states have (on average 1.4877450980392157) internal successors, (607), 408 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) [2024-09-20 12:08:58,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 611 transitions. [2024-09-20 12:08:58,615 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 611 transitions. Word has length 30 [2024-09-20 12:08:58,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:08:58,615 INFO L474 AbstractCegarLoop]: Abstraction has 413 states and 611 transitions. [2024-09-20 12:08:58,615 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.8333333333333335) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:08:58,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:58,616 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 611 transitions. [2024-09-20 12:08:58,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-20 12:08:58,617 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:08:58,617 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:08:58,635 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-20 12:08:58,818 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-20 12:08:58,818 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:08:58,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:08:58,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1736256998, now seen corresponding path program 5 times [2024-09-20 12:08:58,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:08:58,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577782398] [2024-09-20 12:08:58,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:08:58,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:08:58,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:59,028 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:08:59,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:08:59,031 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:59,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:08:59,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577782398] [2024-09-20 12:08:59,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577782398] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:08:59,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259221918] [2024-09-20 12:08:59,032 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:08:59,032 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:08:59,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:08:59,034 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) [2024-09-20 12:08:59,036 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-20 12:08:59,105 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2024-09-20 12:08:59,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:08:59,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-20 12:08:59,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:08:59,244 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:08:59,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:08:59,578 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-20 12:08:59,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259221918] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:08:59,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:08:59,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19, 13] total 32 [2024-09-20 12:08:59,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564604473] [2024-09-20 12:08:59,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:08:59,580 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-20 12:08:59,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:08:59,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-20 12:08:59,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=776, Unknown=0, NotChecked=0, Total=992 [2024-09-20 12:08:59,582 INFO L87 Difference]: Start difference. First operand 413 states and 611 transitions. Second operand has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:02,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:02,344 INFO L93 Difference]: Finished difference Result 1049 states and 1576 transitions. [2024-09-20 12:09:02,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2024-09-20 12:09:02,344 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2024-09-20 12:09:02,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:02,349 INFO L225 Difference]: With dead ends: 1049 [2024-09-20 12:09:02,350 INFO L226 Difference]: Without dead ends: 975 [2024-09-20 12:09:02,351 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2098 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1727, Invalid=5413, Unknown=0, NotChecked=0, Total=7140 [2024-09-20 12:09:02,352 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 305 mSDsluCounter, 482 mSDsCounter, 0 mSdLazyCounter, 1683 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 514 SdHoareTripleChecker+Invalid, 2010 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 1683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:02,352 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 514 Invalid, 2010 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 1683 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:09:02,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 975 states. [2024-09-20 12:09:02,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 975 to 484. [2024-09-20 12:09:02,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 479 states have (on average 1.4968684759916493) internal successors, (717), 479 states have internal predecessors, (717), 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) [2024-09-20 12:09:02,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 721 transitions. [2024-09-20 12:09:02,649 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 721 transitions. Word has length 31 [2024-09-20 12:09:02,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:02,649 INFO L474 AbstractCegarLoop]: Abstraction has 484 states and 721 transitions. [2024-09-20 12:09:02,650 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.78125) internal successors, (57), 32 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:02,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:02,650 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 721 transitions. [2024-09-20 12:09:02,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:09:02,651 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:02,651 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:02,665 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:02,851 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:02,852 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:02,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:02,852 INFO L85 PathProgramCache]: Analyzing trace with hash -1362411958, now seen corresponding path program 6 times [2024-09-20 12:09:02,852 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:02,852 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838470113] [2024-09-20 12:09:02,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:02,852 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:02,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:03,056 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:03,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:03,058 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-20 12:09:03,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838470113] [2024-09-20 12:09:03,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838470113] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:03,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90141014] [2024-09-20 12:09:03,059 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:09:03,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:03,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:03,062 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) [2024-09-20 12:09:03,064 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-20 12:09:03,110 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-09-20 12:09:03,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:03,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-20 12:09:03,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:03,248 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 12:09:03,249 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:03,436 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 10 proven. 25 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-20 12:09:03,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90141014] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:03,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:03,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8, 8] total 21 [2024-09-20 12:09:03,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645455608] [2024-09-20 12:09:03,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:03,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-20 12:09:03,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:03,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-20 12:09:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2024-09-20 12:09:03,438 INFO L87 Difference]: Start difference. First operand 484 states and 721 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:07,015 INFO L93 Difference]: Finished difference Result 1054 states and 1529 transitions. [2024-09-20 12:09:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2024-09-20 12:09:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 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 [2024-09-20 12:09:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:07,020 INFO L225 Difference]: With dead ends: 1054 [2024-09-20 12:09:07,020 INFO L226 Difference]: Without dead ends: 962 [2024-09-20 12:09:07,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 61 SyntacticMatches, 10 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2933 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=989, Invalid=8517, Unknown=0, NotChecked=0, Total=9506 [2024-09-20 12:09:07,023 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 384 mSDsluCounter, 384 mSDsCounter, 0 mSdLazyCounter, 1105 mSolverCounterSat, 269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 429 SdHoareTripleChecker+Invalid, 1374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 269 IncrementalHoareTripleChecker+Valid, 1105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:07,023 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [384 Valid, 429 Invalid, 1374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [269 Valid, 1105 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2024-09-20 12:09:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 962 states. [2024-09-20 12:09:07,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 962 to 510. [2024-09-20 12:09:07,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 510 states, 505 states have (on average 1.491089108910891) internal successors, (753), 505 states have internal predecessors, (753), 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) [2024-09-20 12:09:07,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 510 states to 510 states and 757 transitions. [2024-09-20 12:09:07,341 INFO L78 Accepts]: Start accepts. Automaton has 510 states and 757 transitions. Word has length 33 [2024-09-20 12:09:07,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:07,342 INFO L474 AbstractCegarLoop]: Abstraction has 510 states and 757 transitions. [2024-09-20 12:09:07,342 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:07,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:07,342 INFO L276 IsEmpty]: Start isEmpty. Operand 510 states and 757 transitions. [2024-09-20 12:09:07,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-20 12:09:07,343 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:07,344 INFO L216 NwaCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:07,360 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2024-09-20 12:09:07,544 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:07,545 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:07,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:07,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1741060780, now seen corresponding path program 7 times [2024-09-20 12:09:07,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:07,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464290581] [2024-09-20 12:09:07,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:07,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:07,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:07,765 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:07,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:09:07,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464290581] [2024-09-20 12:09:07,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464290581] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:07,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636331979] [2024-09-20 12:09:07,768 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:09:07,768 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:07,768 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:07,770 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) [2024-09-20 12:09:07,772 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-20 12:09:07,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:07,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-09-20 12:09:07,821 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:09:07,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:08,211 INFO L134 CoverageAnalysis]: Checked inductivity of 83 backedges. 0 proven. 79 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-09-20 12:09:08,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1636331979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:08,211 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:08,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-09-20 12:09:08,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855172202] [2024-09-20 12:09:08,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:08,212 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 12:09:08,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:08,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 12:09:08,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=818, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:09:08,213 INFO L87 Difference]: Start difference. First operand 510 states and 757 transitions. Second operand has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2024-09-20 12:09:19,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:19,801 INFO L93 Difference]: Finished difference Result 1408 states and 2227 transitions. [2024-09-20 12:09:19,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2024-09-20 12:09:19,802 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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 33 [2024-09-20 12:09:19,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:19,808 INFO L225 Difference]: With dead ends: 1408 [2024-09-20 12:09:19,808 INFO L226 Difference]: Without dead ends: 1236 [2024-09-20 12:09:19,812 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7998 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=5551, Invalid=15329, Unknown=0, NotChecked=0, Total=20880 [2024-09-20 12:09:19,812 INFO L434 NwaCegarLoop]: 71 mSDtfsCounter, 1663 mSDsluCounter, 972 mSDsCounter, 0 mSdLazyCounter, 1505 mSolverCounterSat, 1110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1663 SdHoareTripleChecker+Valid, 1043 SdHoareTripleChecker+Invalid, 2615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1110 IncrementalHoareTripleChecker+Valid, 1505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:19,813 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1663 Valid, 1043 Invalid, 2615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1110 Valid, 1505 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2024-09-20 12:09:19,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1236 states. [2024-09-20 12:09:20,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1236 to 561. [2024-09-20 12:09:20,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 561 states, 556 states have (on average 1.485611510791367) internal successors, (826), 556 states have internal predecessors, (826), 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) [2024-09-20 12:09:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 561 states to 561 states and 830 transitions. [2024-09-20 12:09:20,272 INFO L78 Accepts]: Start accepts. Automaton has 561 states and 830 transitions. Word has length 33 [2024-09-20 12:09:20,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:20,272 INFO L474 AbstractCegarLoop]: Abstraction has 561 states and 830 transitions. [2024-09-20 12:09:20,272 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.4545454545454546) internal successors, (48), 33 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) [2024-09-20 12:09:20,273 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:20,273 INFO L276 IsEmpty]: Start isEmpty. Operand 561 states and 830 transitions. [2024-09-20 12:09:20,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:09:20,274 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:20,274 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:20,296 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2024-09-20 12:09:20,479 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:20,479 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:20,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:20,480 INFO L85 PathProgramCache]: Analyzing trace with hash -906855808, now seen corresponding path program 8 times [2024-09-20 12:09:20,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:20,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1094714718] [2024-09-20 12:09:20,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:20,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:20,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:20,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:20,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:20,994 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:09:20,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1094714718] [2024-09-20 12:09:20,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1094714718] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:20,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088400701] [2024-09-20 12:09:20,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:09:20,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:20,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:20,997 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) [2024-09-20 12:09:20,999 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-20 12:09:21,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:09:21,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:21,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-20 12:09:21,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:21,855 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:21,856 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:22,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:09:22,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1088400701] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:22,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:22,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 22, 14] total 39 [2024-09-20 12:09:22,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050460113] [2024-09-20 12:09:22,365 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:22,365 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2024-09-20 12:09:22,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:22,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2024-09-20 12:09:22,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2024-09-20 12:09:22,367 INFO L87 Difference]: Start difference. First operand 561 states and 830 transitions. Second operand has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 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) [2024-09-20 12:09:27,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:27,960 INFO L93 Difference]: Finished difference Result 762 states and 1064 transitions. [2024-09-20 12:09:27,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-09-20 12:09:27,961 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 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 34 [2024-09-20 12:09:27,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:27,964 INFO L225 Difference]: With dead ends: 762 [2024-09-20 12:09:27,964 INFO L226 Difference]: Without dead ends: 644 [2024-09-20 12:09:27,965 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1092 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=535, Invalid=4021, Unknown=0, NotChecked=0, Total=4556 [2024-09-20 12:09:27,966 INFO L434 NwaCegarLoop]: 15 mSDtfsCounter, 74 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 834 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 876 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 834 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:27,966 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 222 Invalid, 876 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 834 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 12:09:27,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 644 states. [2024-09-20 12:09:28,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 644 to 532. [2024-09-20 12:09:28,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 527 states have (on average 1.4743833017077799) internal successors, (777), 527 states have internal predecessors, (777), 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) [2024-09-20 12:09:28,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 781 transitions. [2024-09-20 12:09:28,362 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 781 transitions. Word has length 34 [2024-09-20 12:09:28,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:28,363 INFO L474 AbstractCegarLoop]: Abstraction has 532 states and 781 transitions. [2024-09-20 12:09:28,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.8974358974358974) internal successors, (74), 37 states have internal predecessors, (74), 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) [2024-09-20 12:09:28,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:28,363 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 781 transitions. [2024-09-20 12:09:28,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-20 12:09:28,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:28,364 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:28,382 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-20 12:09:28,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-20 12:09:28,569 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:28,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash -1249736321, now seen corresponding path program 7 times [2024-09-20 12:09:28,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:28,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399026536] [2024-09-20 12:09:28,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:28,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:28,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:28,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:28,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:28,817 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:28,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399026536] [2024-09-20 12:09:28,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399026536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:28,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108811105] [2024-09-20 12:09:28,818 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:09:28,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:28,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:28,819 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) [2024-09-20 12:09:28,820 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-20 12:09:28,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:28,859 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-20 12:09:28,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:28,986 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 12:09:28,986 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 63 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2024-09-20 12:09:29,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108811105] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:29,169 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:29,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9, 9] total 31 [2024-09-20 12:09:29,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438643825] [2024-09-20 12:09:29,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:29,170 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-20 12:09:29,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:29,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-20 12:09:29,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2024-09-20 12:09:29,171 INFO L87 Difference]: Start difference. First operand 532 states and 781 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:33,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:33,551 INFO L93 Difference]: Finished difference Result 1793 states and 2748 transitions. [2024-09-20 12:09:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2024-09-20 12:09:33,551 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2024-09-20 12:09:33,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:33,558 INFO L225 Difference]: With dead ends: 1793 [2024-09-20 12:09:33,558 INFO L226 Difference]: Without dead ends: 1702 [2024-09-20 12:09:33,559 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2284 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1644, Invalid=7668, Unknown=0, NotChecked=0, Total=9312 [2024-09-20 12:09:33,560 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 342 mSDsluCounter, 838 mSDsCounter, 0 mSdLazyCounter, 2729 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 889 SdHoareTripleChecker+Invalid, 3106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 2729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:33,560 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [342 Valid, 889 Invalid, 3106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 2729 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2024-09-20 12:09:33,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1702 states. [2024-09-20 12:09:34,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1702 to 708. [2024-09-20 12:09:34,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 708 states, 703 states have (on average 1.496443812233286) internal successors, (1052), 703 states have internal predecessors, (1052), 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) [2024-09-20 12:09:34,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 708 states to 708 states and 1056 transitions. [2024-09-20 12:09:34,256 INFO L78 Accepts]: Start accepts. Automaton has 708 states and 1056 transitions. Word has length 34 [2024-09-20 12:09:34,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:34,257 INFO L474 AbstractCegarLoop]: Abstraction has 708 states and 1056 transitions. [2024-09-20 12:09:34,257 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:34,257 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:34,257 INFO L276 IsEmpty]: Start isEmpty. Operand 708 states and 1056 transitions. [2024-09-20 12:09:34,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2024-09-20 12:09:34,258 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:34,259 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:34,276 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:34,459 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-09-20 12:09:34,459 INFO L399 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:34,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:34,460 INFO L85 PathProgramCache]: Analyzing trace with hash 572674207, now seen corresponding path program 9 times [2024-09-20 12:09:34,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:34,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591898184] [2024-09-20 12:09:34,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:34,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:34,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:34,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:34,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:34,683 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 33 trivial. 0 not checked. [2024-09-20 12:09:34,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591898184] [2024-09-20 12:09:34,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591898184] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:34,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852237748] [2024-09-20 12:09:34,684 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:09:34,684 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:34,684 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:34,688 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) [2024-09-20 12:09:34,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-20 12:09:34,744 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-09-20 12:09:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:34,746 INFO L262 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-20 12:09:34,747 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:34,857 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:09:34,858 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:34,998 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-20 12:09:34,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852237748] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:34,999 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:34,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7, 7] total 14 [2024-09-20 12:09:35,000 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358957555] [2024-09-20 12:09:35,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:35,002 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-20 12:09:35,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:35,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-20 12:09:35,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2024-09-20 12:09:35,002 INFO L87 Difference]: Start difference. First operand 708 states and 1056 transitions. Second operand has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:39,642 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 [] [2024-09-20 12:09:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:41,255 INFO L93 Difference]: Finished difference Result 1782 states and 2675 transitions. [2024-09-20 12:09:41,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-20 12:09:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 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 [2024-09-20 12:09:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:41,261 INFO L225 Difference]: With dead ends: 1782 [2024-09-20 12:09:41,261 INFO L226 Difference]: Without dead ends: 1518 [2024-09-20 12:09:41,261 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 64 SyntacticMatches, 9 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:09:41,262 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 188 mSDsluCounter, 194 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 85 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 188 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 194 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:41,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [188 Valid, 238 Invalid, 194 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 108 Invalid, 1 Unknown, 0 Unchecked, 4.3s Time] [2024-09-20 12:09:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1518 states. [2024-09-20 12:09:42,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1518 to 875. [2024-09-20 12:09:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 870 states have (on average 1.5114942528735633) internal successors, (1315), 870 states have internal predecessors, (1315), 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) [2024-09-20 12:09:42,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1319 transitions. [2024-09-20 12:09:42,082 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1319 transitions. Word has length 36 [2024-09-20 12:09:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:42,082 INFO L474 AbstractCegarLoop]: Abstraction has 875 states and 1319 transitions. [2024-09-20 12:09:42,083 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.5714285714285716) internal successors, (36), 14 states have internal predecessors, (36), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:42,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:42,083 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1319 transitions. [2024-09-20 12:09:42,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-20 12:09:42,084 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:42,085 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:42,098 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:42,288 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:42,289 INFO L399 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:42,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:42,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1567952235, now seen corresponding path program 10 times [2024-09-20 12:09:42,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:42,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022378503] [2024-09-20 12:09:42,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:42,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:42,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:42,460 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:42,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 12:09:42,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022378503] [2024-09-20 12:09:42,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022378503] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:42,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1163871288] [2024-09-20 12:09:42,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:09:42,463 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:42,464 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:42,465 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) [2024-09-20 12:09:42,467 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2024-09-20 12:09:42,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:09:42,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:42,513 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-20 12:09:42,514 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:42,561 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-20 12:09:42,561 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:42,703 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-20 12:09:42,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1163871288] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:42,703 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:42,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 8] total 22 [2024-09-20 12:09:42,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939749057] [2024-09-20 12:09:42,703 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:42,704 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-20 12:09:42,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:42,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-20 12:09:42,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-09-20 12:09:42,705 INFO L87 Difference]: Start difference. First operand 875 states and 1319 transitions. Second operand has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:44,606 INFO L93 Difference]: Finished difference Result 1190 states and 1698 transitions. [2024-09-20 12:09:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2024-09-20 12:09:44,606 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2024-09-20 12:09:44,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:44,610 INFO L225 Difference]: With dead ends: 1190 [2024-09-20 12:09:44,610 INFO L226 Difference]: Without dead ends: 1017 [2024-09-20 12:09:44,611 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=317, Invalid=2439, Unknown=0, NotChecked=0, Total=2756 [2024-09-20 12:09:44,612 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 81 mSDsluCounter, 369 mSDsCounter, 0 mSdLazyCounter, 721 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 821 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 721 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:44,612 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [81 Valid, 414 Invalid, 821 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 721 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-20 12:09:44,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1017 states. [2024-09-20 12:09:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1017 to 859. [2024-09-20 12:09:45,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 859 states, 854 states have (on average 1.4976580796252927) internal successors, (1279), 854 states have internal predecessors, (1279), 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) [2024-09-20 12:09:45,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 859 states to 859 states and 1283 transitions. [2024-09-20 12:09:45,344 INFO L78 Accepts]: Start accepts. Automaton has 859 states and 1283 transitions. Word has length 37 [2024-09-20 12:09:45,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:45,344 INFO L474 AbstractCegarLoop]: Abstraction has 859 states and 1283 transitions. [2024-09-20 12:09:45,345 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.7727272727272727) internal successors, (39), 22 states have internal predecessors, (39), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:45,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:45,345 INFO L276 IsEmpty]: Start isEmpty. Operand 859 states and 1283 transitions. [2024-09-20 12:09:45,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:09:45,346 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:45,347 INFO L216 NwaCegarLoop]: trace histogram [8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:45,362 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2024-09-20 12:09:45,547 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2024-09-20 12:09:45,547 INFO L399 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:45,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:45,548 INFO L85 PathProgramCache]: Analyzing trace with hash 1064696843, now seen corresponding path program 2 times [2024-09-20 12:09:45,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:45,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411467268] [2024-09-20 12:09:45,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:45,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:45,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:45,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:45,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:45,800 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2024-09-20 12:09:45,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411467268] [2024-09-20 12:09:45,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411467268] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:45,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [931460710] [2024-09-20 12:09:45,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-20 12:09:45,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:45,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:45,803 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) [2024-09-20 12:09:45,805 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2024-09-20 12:09:45,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-20 12:09:45,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:45,863 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 52 conjuncts are in the unsatisfiable core [2024-09-20 12:09:45,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:45,967 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:09:45,968 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:46,158 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 18 proven. 44 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2024-09-20 12:09:46,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [931460710] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:46,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:46,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19, 10] total 27 [2024-09-20 12:09:46,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699032668] [2024-09-20 12:09:46,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:46,159 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-20 12:09:46,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:46,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-20 12:09:46,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2024-09-20 12:09:46,160 INFO L87 Difference]: Start difference. First operand 859 states and 1283 transitions. Second operand has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:50,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:09:50,803 INFO L93 Difference]: Finished difference Result 1708 states and 2444 transitions. [2024-09-20 12:09:50,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2024-09-20 12:09:50,803 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 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 [2024-09-20 12:09:50,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:09:50,808 INFO L225 Difference]: With dead ends: 1708 [2024-09-20 12:09:50,808 INFO L226 Difference]: Without dead ends: 1586 [2024-09-20 12:09:50,809 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3092 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2076, Invalid=8430, Unknown=0, NotChecked=0, Total=10506 [2024-09-20 12:09:50,810 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 371 mSDsluCounter, 644 mSDsCounter, 0 mSdLazyCounter, 2744 mSolverCounterSat, 283 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 371 SdHoareTripleChecker+Valid, 684 SdHoareTripleChecker+Invalid, 3027 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 283 IncrementalHoareTripleChecker+Valid, 2744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2024-09-20 12:09:50,810 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [371 Valid, 684 Invalid, 3027 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [283 Valid, 2744 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2024-09-20 12:09:50,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1586 states. [2024-09-20 12:09:51,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1586 to 936. [2024-09-20 12:09:51,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 931 states have (on average 1.4951664876476907) internal successors, (1392), 931 states have internal predecessors, (1392), 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) [2024-09-20 12:09:51,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 1396 transitions. [2024-09-20 12:09:51,735 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 1396 transitions. Word has length 39 [2024-09-20 12:09:51,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:09:51,735 INFO L474 AbstractCegarLoop]: Abstraction has 936 states and 1396 transitions. [2024-09-20 12:09:51,736 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.4074074074074074) internal successors, (65), 27 states have internal predecessors, (65), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:09:51,736 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:51,736 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 1396 transitions. [2024-09-20 12:09:51,737 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-20 12:09:51,738 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:09:51,738 INFO L216 NwaCegarLoop]: trace histogram [13, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:09:51,751 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2024-09-20 12:09:51,938 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2024-09-20 12:09:51,938 INFO L399 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:09:51,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:09:51,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1900096203, now seen corresponding path program 11 times [2024-09-20 12:09:51,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:09:51,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854317100] [2024-09-20 12:09:51,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:09:51,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:09:51,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:52,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:09:52,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:09:52,198 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-20 12:09:52,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:09:52,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854317100] [2024-09-20 12:09:52,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854317100] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:09:52,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909155246] [2024-09-20 12:09:52,199 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-20 12:09:52,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:09:52,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:09:52,200 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) [2024-09-20 12:09:52,201 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2024-09-20 12:09:52,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2024-09-20 12:09:52,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:09:52,276 INFO L262 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 41 conjuncts are in the unsatisfiable core [2024-09-20 12:09:52,277 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:09:52,310 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:09:52,310 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:09:52,668 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-20 12:09:52,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909155246] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:09:52,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:09:52,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 16, 16] total 33 [2024-09-20 12:09:52,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783160959] [2024-09-20 12:09:52,669 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:09:52,669 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-20 12:09:52,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:09:52,670 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-20 12:09:52,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=798, Unknown=0, NotChecked=0, Total=1056 [2024-09-20 12:09:52,671 INFO L87 Difference]: Start difference. First operand 936 states and 1396 transitions. Second operand has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:02,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:10:02,308 INFO L93 Difference]: Finished difference Result 2428 states and 3749 transitions. [2024-09-20 12:10:02,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2024-09-20 12:10:02,309 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 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 [2024-09-20 12:10:02,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:10:02,315 INFO L225 Difference]: With dead ends: 2428 [2024-09-20 12:10:02,315 INFO L226 Difference]: Without dead ends: 2051 [2024-09-20 12:10:02,317 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2356, Invalid=5126, Unknown=0, NotChecked=0, Total=7482 [2024-09-20 12:10:02,317 INFO L434 NwaCegarLoop]: 77 mSDtfsCounter, 1263 mSDsluCounter, 1119 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 864 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1263 SdHoareTripleChecker+Valid, 1196 SdHoareTripleChecker+Invalid, 2135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 864 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:10:02,318 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1263 Valid, 1196 Invalid, 2135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [864 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2024-09-20 12:10:02,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2051 states. [2024-09-20 12:10:03,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2051 to 1033. [2024-09-20 12:10:03,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1028 states have (on average 1.4990272373540856) internal successors, (1541), 1028 states have internal predecessors, (1541), 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) [2024-09-20 12:10:03,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 1545 transitions. [2024-09-20 12:10:03,332 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 1545 transitions. Word has length 39 [2024-09-20 12:10:03,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:10:03,332 INFO L474 AbstractCegarLoop]: Abstraction has 1033 states and 1545 transitions. [2024-09-20 12:10:03,333 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.242424242424242) internal successors, (74), 33 states have internal predecessors, (74), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:03,333 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 1545 transitions. [2024-09-20 12:10:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2024-09-20 12:10:03,334 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:10:03,335 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:10:03,352 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2024-09-20 12:10:03,535 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-09-20 12:10:03,535 INFO L399 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:10:03,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:03,536 INFO L85 PathProgramCache]: Analyzing trace with hash 171159391, now seen corresponding path program 12 times [2024-09-20 12:10:03,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:10:03,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818780722] [2024-09-20 12:10:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:10:03,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:10:03,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:04,284 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:10:04,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:04,287 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-20 12:10:04,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:10:04,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818780722] [2024-09-20 12:10:04,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818780722] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:10:04,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288932124] [2024-09-20 12:10:04,289 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-20 12:10:04,289 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:04,289 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:10:04,290 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) [2024-09-20 12:10:04,293 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2024-09-20 12:10:04,415 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-09-20 12:10:04,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:10:04,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 80 conjuncts are in the unsatisfiable core [2024-09-20 12:10:04,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:10:05,504 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:05,504 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:10:06,831 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:06,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288932124] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:10:06,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:10:06,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 28, 27] total 58 [2024-09-20 12:10:06,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840307731] [2024-09-20 12:10:06,832 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:10:06,832 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2024-09-20 12:10:06,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:10:06,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2024-09-20 12:10:06,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=460, Invalid=2846, Unknown=0, NotChecked=0, Total=3306 [2024-09-20 12:10:06,833 INFO L87 Difference]: Start difference. First operand 1033 states and 1545 transitions. Second operand has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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) [2024-09-20 12:10:16,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:10:16,251 INFO L93 Difference]: Finished difference Result 1535 states and 2128 transitions. [2024-09-20 12:10:16,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2024-09-20 12:10:16,251 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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 40 [2024-09-20 12:10:16,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:10:16,256 INFO L225 Difference]: With dead ends: 1535 [2024-09-20 12:10:16,256 INFO L226 Difference]: Without dead ends: 1504 [2024-09-20 12:10:16,257 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2303 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1308, Invalid=7812, Unknown=0, NotChecked=0, Total=9120 [2024-09-20 12:10:16,257 INFO L434 NwaCegarLoop]: 16 mSDtfsCounter, 120 mSDsluCounter, 337 mSDsCounter, 0 mSdLazyCounter, 1355 mSolverCounterSat, 205 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 1560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 205 IncrementalHoareTripleChecker+Valid, 1355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2024-09-20 12:10:16,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 353 Invalid, 1560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [205 Valid, 1355 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2024-09-20 12:10:16,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1504 states. [2024-09-20 12:10:17,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1504 to 1017. [2024-09-20 12:10:17,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1017 states, 1012 states have (on average 1.5059288537549407) internal successors, (1524), 1012 states have internal predecessors, (1524), 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) [2024-09-20 12:10:17,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1017 states to 1017 states and 1528 transitions. [2024-09-20 12:10:17,303 INFO L78 Accepts]: Start accepts. Automaton has 1017 states and 1528 transitions. Word has length 40 [2024-09-20 12:10:17,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:10:17,303 INFO L474 AbstractCegarLoop]: Abstraction has 1017 states and 1528 transitions. [2024-09-20 12:10:17,303 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.5172413793103448) internal successors, (88), 56 states have internal predecessors, (88), 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) [2024-09-20 12:10:17,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:17,303 INFO L276 IsEmpty]: Start isEmpty. Operand 1017 states and 1528 transitions. [2024-09-20 12:10:17,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-09-20 12:10:17,305 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:10:17,305 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:10:17,323 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2024-09-20 12:10:17,505 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-09-20 12:10:17,505 INFO L399 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:10:17,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:17,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1585091015, now seen corresponding path program 3 times [2024-09-20 12:10:17,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:10:17,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565857520] [2024-09-20 12:10:17,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:10:17,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:10:17,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:17,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:10:17,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:17,859 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:10:17,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:10:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565857520] [2024-09-20 12:10:17,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565857520] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:10:17,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802735065] [2024-09-20 12:10:17,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-20 12:10:17,860 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:17,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:10:17,862 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) [2024-09-20 12:10:17,864 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2024-09-20 12:10:17,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2024-09-20 12:10:17,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:10:17,970 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-20 12:10:17,971 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:10:18,279 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 12:10:18,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:10:18,668 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2024-09-20 12:10:18,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802735065] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:10:18,668 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:10:18,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11, 11] total 30 [2024-09-20 12:10:18,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876382256] [2024-09-20 12:10:18,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:10:18,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-20 12:10:18,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:10:18,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-20 12:10:18,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2024-09-20 12:10:18,669 INFO L87 Difference]: Start difference. First operand 1017 states and 1528 transitions. Second operand has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:45,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:10:45,797 INFO L93 Difference]: Finished difference Result 2849 states and 3992 transitions. [2024-09-20 12:10:45,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 398 states. [2024-09-20 12:10:45,798 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2024-09-20 12:10:45,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:10:45,808 INFO L225 Difference]: With dead ends: 2849 [2024-09-20 12:10:45,809 INFO L226 Difference]: Without dead ends: 2689 [2024-09-20 12:10:45,818 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 506 GetRequests, 69 SyntacticMatches, 16 SemanticMatches, 421 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77062 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=7170, Invalid=171336, Unknown=0, NotChecked=0, Total=178506 [2024-09-20 12:10:45,819 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 1012 mSDsluCounter, 639 mSDsCounter, 0 mSdLazyCounter, 5681 mSolverCounterSat, 1123 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1012 SdHoareTripleChecker+Valid, 675 SdHoareTripleChecker+Invalid, 6804 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1123 IncrementalHoareTripleChecker+Valid, 5681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2024-09-20 12:10:45,819 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1012 Valid, 675 Invalid, 6804 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1123 Valid, 5681 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2024-09-20 12:10:45,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2689 states. [2024-09-20 12:10:47,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2689 to 1022. [2024-09-20 12:10:47,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1017 states have (on average 1.4926253687315634) internal successors, (1518), 1017 states have internal predecessors, (1518), 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) [2024-09-20 12:10:47,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 1522 transitions. [2024-09-20 12:10:47,170 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 1522 transitions. Word has length 41 [2024-09-20 12:10:47,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:10:47,170 INFO L474 AbstractCegarLoop]: Abstraction has 1022 states and 1522 transitions. [2024-09-20 12:10:47,170 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.066666666666667) internal successors, (62), 30 states have internal predecessors, (62), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:10:47,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:47,170 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 1522 transitions. [2024-09-20 12:10:47,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:10:47,172 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:10:47,172 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:10:47,190 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2024-09-20 12:10:47,376 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:47,377 INFO L399 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:10:47,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:10:47,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1706754144, now seen corresponding path program 13 times [2024-09-20 12:10:47,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:10:47,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905368949] [2024-09-20 12:10:47,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:10:47,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:10:47,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:47,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:10:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:47,651 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 15 proven. 21 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-20 12:10:47,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:10:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905368949] [2024-09-20 12:10:47,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905368949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:10:47,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739415797] [2024-09-20 12:10:47,652 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-20 12:10:47,652 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:10:47,652 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:10:47,654 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) [2024-09-20 12:10:47,655 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2024-09-20 12:10:47,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:10:47,720 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-20 12:10:47,722 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:10:47,889 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 12:10:47,889 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:10:47,985 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-20 12:10:47,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739415797] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:10:47,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:10:47,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 8, 8] total 24 [2024-09-20 12:10:47,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430716744] [2024-09-20 12:10:47,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:10:47,986 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-20 12:10:47,986 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:10:47,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-20 12:10:47,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=385, Unknown=0, NotChecked=0, Total=552 [2024-09-20 12:10:47,987 INFO L87 Difference]: Start difference. First operand 1022 states and 1522 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:11:04,166 WARN L293 SmtUtils]: Spent 16.03s on a formula simplification that was a NOOP. DAG size: 26 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:11:16,231 WARN L293 SmtUtils]: Spent 12.03s on a formula simplification that was a NOOP. DAG size: 24 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:11:24,308 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:11:40,610 WARN L293 SmtUtils]: Spent 12.02s on a formula simplification that was a NOOP. DAG size: 22 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:11:48,704 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 18 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:12:01,084 WARN L293 SmtUtils]: Spent 8.02s on a formula simplification that was a NOOP. DAG size: 20 (called from [L 391] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2024-09-20 12:12:13,863 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:12:18,062 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Bool, Int], hasArrays=false, hasNonlinArith=false, quantifiers [] [2024-09-20 12:12:22,370 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 [] [2024-09-20 12:12:25,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-20 12:12:25,770 INFO L93 Difference]: Finished difference Result 2885 states and 4277 transitions. [2024-09-20 12:12:25,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2024-09-20 12:12:25,771 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2024-09-20 12:12:25,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-20 12:12:25,777 INFO L225 Difference]: With dead ends: 2885 [2024-09-20 12:12:25,777 INFO L226 Difference]: Without dead ends: 2585 [2024-09-20 12:12:25,778 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 77 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 80.8s TimeCoverageRelationStatistics Valid=657, Invalid=1505, Unknown=0, NotChecked=0, Total=2162 [2024-09-20 12:12:25,779 INFO L434 NwaCegarLoop]: 51 mSDtfsCounter, 296 mSDsluCounter, 295 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 158 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 12.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 296 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2024-09-20 12:12:25,779 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [296 Valid, 346 Invalid, 344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 183 Invalid, 3 Unknown, 0 Unchecked, 12.3s Time] [2024-09-20 12:12:25,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2585 states. [2024-09-20 12:12:27,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2585 to 1258. [2024-09-20 12:12:27,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1258 states, 1253 states have (on average 1.4980047885075818) internal successors, (1877), 1253 states have internal predecessors, (1877), 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) [2024-09-20 12:12:27,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1258 states to 1258 states and 1881 transitions. [2024-09-20 12:12:27,202 INFO L78 Accepts]: Start accepts. Automaton has 1258 states and 1881 transitions. Word has length 42 [2024-09-20 12:12:27,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-20 12:12:27,203 INFO L474 AbstractCegarLoop]: Abstraction has 1258 states and 1881 transitions. [2024-09-20 12:12:27,203 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-20 12:12:27,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:27,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1258 states and 1881 transitions. [2024-09-20 12:12:27,205 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-20 12:12:27,205 INFO L208 NwaCegarLoop]: Found error trace [2024-09-20 12:12:27,205 INFO L216 NwaCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-20 12:12:27,218 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2024-09-20 12:12:27,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2024-09-20 12:12:27,405 INFO L399 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-20 12:12:27,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-20 12:12:27,406 INFO L85 PathProgramCache]: Analyzing trace with hash -783545697, now seen corresponding path program 4 times [2024-09-20 12:12:27,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-20 12:12:27,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730108322] [2024-09-20 12:12:27,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-20 12:12:27,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-20 12:12:27,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:27,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-20 12:12:27,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-20 12:12:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:12:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-20 12:12:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730108322] [2024-09-20 12:12:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730108322] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-20 12:12:27,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130673341] [2024-09-20 12:12:27,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-20 12:12:27,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-20 12:12:27,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-20 12:12:27,958 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) [2024-09-20 12:12:27,959 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2024-09-20 12:12:28,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-20 12:12:28,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-20 12:12:28,004 INFO L262 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-20 12:12:28,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-20 12:12:28,056 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:12:28,056 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-20 12:12:29,162 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-20 12:12:29,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130673341] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-20 12:12:29,162 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-20 12:12:29,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 59 [2024-09-20 12:12:29,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664017292] [2024-09-20 12:12:29,162 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-20 12:12:29,163 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2024-09-20 12:12:29,163 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-20 12:12:29,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2024-09-20 12:12:29,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=846, Invalid=2576, Unknown=0, NotChecked=0, Total=3422 [2024-09-20 12:12:29,164 INFO L87 Difference]: Start difference. First operand 1258 states and 1881 transitions. Second operand has 59 states, 59 states have (on average 1.1864406779661016) internal successors, (70), 59 states have internal predecessors, (70), 2 states have call successors, (3), 2 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)