./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.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 de325976 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/recursive-simple/id_i15_o15-1.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 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --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-de32597-m [2024-09-17 19:21:30,040 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-17 19:21:30,114 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-17 19:21:30,120 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-17 19:21:30,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-17 19:21:30,153 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-17 19:21:30,154 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-17 19:21:30,154 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-17 19:21:30,155 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-17 19:21:30,155 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-17 19:21:30,156 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-17 19:21:30,156 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-17 19:21:30,157 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-17 19:21:30,159 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-17 19:21:30,159 INFO L153 SettingsManager]: * Use SBE=true [2024-09-17 19:21:30,160 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-17 19:21:30,160 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-17 19:21:30,160 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-17 19:21:30,161 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-17 19:21:30,161 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-17 19:21:30,161 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-17 19:21:30,162 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-17 19:21:30,162 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-17 19:21:30,163 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-17 19:21:30,163 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-17 19:21:30,163 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-17 19:21:30,164 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-17 19:21:30,168 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-17 19:21:30,169 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-17 19:21:30,169 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-17 19:21:30,169 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-17 19:21:30,170 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-17 19:21:30,170 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:21:30,170 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-17 19:21:30,172 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-17 19:21:30,172 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-17 19:21:30,172 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-17 19:21:30,172 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-17 19:21:30,173 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-17 19:21:30,173 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-17 19:21:30,174 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-17 19:21:30,174 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-17 19:21:30,175 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-17 19:21:30,412 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-17 19:21:30,440 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-17 19:21:30,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-17 19:21:30,444 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-17 19:21:30,444 INFO L274 PluginConnector]: CDTParser initialized [2024-09-17 19:21:30,446 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-17 19:21:31,923 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-17 19:21:32,102 INFO L384 CDTParser]: Found 1 translation units. [2024-09-17 19:21:32,103 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-17 19:21:32,113 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/395cb92ef/49035877e75643d4bc200682e8c5585b/FLAG3eb275341 [2024-09-17 19:21:32,487 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/395cb92ef/49035877e75643d4bc200682e8c5585b [2024-09-17 19:21:32,489 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-17 19:21:32,491 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-17 19:21:32,492 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-17 19:21:32,492 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-17 19:21:32,496 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-17 19:21:32,497 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,497 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@157cf489 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32, skipping insertion in model container [2024-09-17 19:21:32,498 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,512 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-17 19:21:32,667 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/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-17 19:21:32,672 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:21:32,691 INFO L200 MainTranslator]: Completed pre-run [2024-09-17 19:21:32,704 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/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-17 19:21:32,704 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-17 19:21:32,721 INFO L204 MainTranslator]: Completed translation [2024-09-17 19:21:32,722 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32 WrapperNode [2024-09-17 19:21:32,722 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-17 19:21:32,723 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-17 19:21:32,723 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-17 19:21:32,723 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-17 19:21:32,730 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,736 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,742 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-17 19:21:32,742 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-17 19:21:32,743 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-17 19:21:32,743 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-17 19:21:32,744 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-17 19:21:32,754 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,754 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,756 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,769 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]. [2024-09-17 19:21:32,769 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,769 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,777 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,779 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,779 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,780 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,781 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-17 19:21:32,783 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-17 19:21:32,783 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-17 19:21:32,783 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-17 19:21:32,784 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (1/1) ... [2024-09-17 19:21:32,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-17 19:21:32,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:32,817 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) [2024-09-17 19:21:32,824 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 [2024-09-17 19:21:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-17 19:21:32,871 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-17 19:21:32,871 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-17 19:21:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-17 19:21:32,872 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-17 19:21:32,872 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-17 19:21:32,872 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-17 19:21:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-17 19:21:32,874 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-17 19:21:32,874 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-17 19:21:32,939 INFO L242 CfgBuilder]: Building ICFG [2024-09-17 19:21:32,941 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-17 19:21:33,066 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-17 19:21:33,067 INFO L291 CfgBuilder]: Performing block encoding [2024-09-17 19:21:33,092 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-17 19:21:33,093 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-17 19:21:33,093 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:21:33 BoogieIcfgContainer [2024-09-17 19:21:33,094 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-17 19:21:33,096 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-17 19:21:33,097 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-17 19:21:33,101 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-17 19:21:33,101 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 17.09 07:21:32" (1/3) ... [2024-09-17 19:21:33,102 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bb6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:21:33, skipping insertion in model container [2024-09-17 19:21:33,103 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 17.09 07:21:32" (2/3) ... [2024-09-17 19:21:33,104 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7a9bb6f1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 17.09 07:21:33, skipping insertion in model container [2024-09-17 19:21:33,104 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:21:33" (3/3) ... [2024-09-17 19:21:33,105 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-17 19:21:33,123 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-17 19:21:33,123 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-17 19:21:33,194 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-17 19:21:33,202 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;@201b1b95, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-17 19:21:33,202 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-17 19:21:33,206 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2024-09-17 19:21:33,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-17 19:21:33,213 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:33,214 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:33,214 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:33,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:33,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-17 19:21:33,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:33,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059091914] [2024-09-17 19:21:33,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:33,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:33,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:33,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:33,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-17 19:21:33,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:33,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059091914] [2024-09-17 19:21:33,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059091914] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:21:33,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-17 19:21:33,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-17 19:21:33,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [80775499] [2024-09-17 19:21:33,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:21:33,591 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-17 19:21:33,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:33,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-17 19:21:33,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:21:33,613 INFO L87 Difference]: Start difference. First operand has 20 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 12 states have internal predecessors, (14), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:21:33,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:33,688 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-17 19:21:33,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-17 19:21:33,691 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 13 [2024-09-17 19:21:33,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:33,698 INFO L225 Difference]: With dead ends: 30 [2024-09-17 19:21:33,698 INFO L226 Difference]: Without dead ends: 18 [2024-09-17 19:21:33,701 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-17 19:21:33,704 INFO L434 NwaCegarLoop]: 17 mSDtfsCounter, 8 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 25 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 25 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:33,705 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 52 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 25 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:33,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-17 19:21:33,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-17 19:21:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 10 states have (on average 1.1) internal successors, (11), 11 states have internal predecessors, (11), 4 states have call successors, (4), 3 states have call predecessors, (4), 3 states have return successors, (4), 3 states have call predecessors, (4), 3 states have call successors, (4) [2024-09-17 19:21:33,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-17 19:21:33,745 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-17 19:21:33,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:33,746 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-17 19:21:33,746 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 5 states have internal predecessors, (8), 2 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-17 19:21:33,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:33,747 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-17 19:21:33,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-17 19:21:33,748 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:33,749 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:33,749 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-17 19:21:33,750 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:33,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:33,752 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-17 19:21:33,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:33,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078043847] [2024-09-17 19:21:33,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:33,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:33,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:33,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:33,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:33,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:34,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:34,082 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:21:34,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078043847] [2024-09-17 19:21:34,083 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078043847] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:34,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330970337] [2024-09-17 19:21:34,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:34,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:34,084 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:34,088 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) [2024-09-17 19:21:34,090 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-17 19:21:34,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:34,147 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-17 19:21:34,153 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:34,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-17 19:21:34,236 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:34,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-17 19:21:34,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330970337] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:34,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:34,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-17 19:21:34,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611997111] [2024-09-17 19:21:34,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:34,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-17 19:21:34,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:34,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-17 19:21:34,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-17 19:21:34,485 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:21:34,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:34,558 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-17 19:21:34,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-17 19:21:34,559 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) Word has length 19 [2024-09-17 19:21:34,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:34,560 INFO L225 Difference]: With dead ends: 25 [2024-09-17 19:21:34,560 INFO L226 Difference]: Without dead ends: 21 [2024-09-17 19:21:34,560 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-17 19:21:34,563 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:34,563 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 64 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:34,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-17 19:21:34,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-17 19:21:34,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 13 states have internal predecessors, (13), 4 states have call successors, (4), 3 states have call predecessors, (4), 4 states have return successors, (5), 4 states have call predecessors, (5), 3 states have call successors, (5) [2024-09-17 19:21:34,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-17 19:21:34,574 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-17 19:21:34,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:34,575 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-17 19:21:34,575 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.2) internal successors, (22), 13 states have internal predecessors, (22), 7 states have call successors, (8), 1 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 7 states have call successors, (7) [2024-09-17 19:21:34,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:34,577 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-17 19:21:34,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-17 19:21:34,578 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:34,578 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:34,591 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-17 19:21:34,780 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:34,781 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:34,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:34,782 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-17 19:21:34,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:34,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [481130233] [2024-09-17 19:21:34,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:34,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:34,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:34,873 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:34,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:34,880 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:34,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:34,964 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:34,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:35,008 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:35,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-17 19:21:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [481130233] [2024-09-17 19:21:35,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [481130233] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:35,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926612769] [2024-09-17 19:21:35,056 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:21:35,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:35,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:35,058 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) [2024-09-17 19:21:35,061 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-17 19:21:35,106 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:21:35,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:35,107 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-17 19:21:35,108 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:35,183 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-17 19:21:35,184 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-17 19:21:35,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926612769] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:35,504 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:35,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-17 19:21:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662018452] [2024-09-17 19:21:35,505 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:35,505 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-17 19:21:35,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-17 19:21:35,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-17 19:21:35,509 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-17 19:21:35,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:35,654 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-17 19:21:35,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-17 19:21:35,655 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) Word has length 25 [2024-09-17 19:21:35,655 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:35,655 INFO L225 Difference]: With dead ends: 28 [2024-09-17 19:21:35,656 INFO L226 Difference]: Without dead ends: 24 [2024-09-17 19:21:35,656 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:21:35,657 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 24 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:35,657 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 64 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:21:35,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-17 19:21:35,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-17 19:21:35,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 15 states have internal predecessors, (15), 4 states have call successors, (4), 3 states have call predecessors, (4), 5 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-09-17 19:21:35,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-17 19:21:35,672 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-17 19:21:35,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:35,672 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-17 19:21:35,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.1666666666666665) internal successors, (26), 15 states have internal predecessors, (26), 8 states have call successors, (9), 1 states have call predecessors, (9), 5 states have return successors, (10), 4 states have call predecessors, (10), 8 states have call successors, (10) [2024-09-17 19:21:35,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:35,673 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-17 19:21:35,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-17 19:21:35,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:35,674 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:35,691 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-17 19:21:35,878 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:35,879 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:35,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:35,879 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-17 19:21:35,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:35,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397109501] [2024-09-17 19:21:35,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:35,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:35,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:35,948 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:35,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:35,951 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:36,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:36,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:36,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:36,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:36,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-17 19:21:36,130 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397109501] [2024-09-17 19:21:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [397109501] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534720920] [2024-09-17 19:21:36,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:21:36,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:36,131 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:36,133 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) [2024-09-17 19:21:36,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-17 19:21:36,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-17 19:21:36,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:36,180 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-17 19:21:36,182 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:36,248 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:21:36,248 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:36,744 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-17 19:21:36,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534720920] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:36,746 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:36,746 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-17 19:21:36,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87835260] [2024-09-17 19:21:36,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:36,747 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-17 19:21:36,747 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:36,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-17 19:21:36,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-17 19:21:36,748 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-17 19:21:36,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:36,826 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-17 19:21:36,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-17 19:21:36,826 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) Word has length 31 [2024-09-17 19:21:36,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:36,827 INFO L225 Difference]: With dead ends: 31 [2024-09-17 19:21:36,827 INFO L226 Difference]: Without dead ends: 27 [2024-09-17 19:21:36,828 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 59 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-17 19:21:36,829 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 13 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:36,829 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 83 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:36,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-17 19:21:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-17 19:21:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 16 states have (on average 1.0625) internal successors, (17), 17 states have internal predecessors, (17), 4 states have call successors, (4), 3 states have call predecessors, (4), 6 states have return successors, (7), 6 states have call predecessors, (7), 3 states have call successors, (7) [2024-09-17 19:21:36,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-17 19:21:36,836 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-17 19:21:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:36,836 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-17 19:21:36,836 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.142857142857143) internal successors, (30), 17 states have internal predecessors, (30), 9 states have call successors, (10), 1 states have call predecessors, (10), 6 states have return successors, (13), 5 states have call predecessors, (13), 9 states have call successors, (13) [2024-09-17 19:21:36,837 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:36,837 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-17 19:21:36,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-17 19:21:36,838 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:36,843 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:36,859 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-17 19:21:37,043 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:37,044 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:37,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:37,044 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-17 19:21:37,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:37,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110623290] [2024-09-17 19:21:37,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:37,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:37,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:37,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,104 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:37,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,158 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:37,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,197 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:37,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:37,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:37,268 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-17 19:21:37,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:37,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110623290] [2024-09-17 19:21:37,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110623290] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:37,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553170446] [2024-09-17 19:21:37,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:21:37,269 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:37,269 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:37,271 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) [2024-09-17 19:21:37,272 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-17 19:21:37,320 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:21:37,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:37,321 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-17 19:21:37,323 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:37,392 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-17 19:21:37,392 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:38,083 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-17 19:21:38,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553170446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:38,084 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:38,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-17 19:21:38,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956646916] [2024-09-17 19:21:38,084 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:38,085 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-17 19:21:38,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:38,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-17 19:21:38,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-17 19:21:38,086 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-17 19:21:38,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:38,172 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-17 19:21:38,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-17 19:21:38,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) Word has length 37 [2024-09-17 19:21:38,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:38,174 INFO L225 Difference]: With dead ends: 34 [2024-09-17 19:21:38,174 INFO L226 Difference]: Without dead ends: 30 [2024-09-17 19:21:38,175 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 71 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:21:38,175 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:38,176 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 88 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:38,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-17 19:21:38,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-17 19:21:38,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 19 states have internal predecessors, (19), 4 states have call successors, (4), 3 states have call predecessors, (4), 7 states have return successors, (8), 7 states have call predecessors, (8), 3 states have call successors, (8) [2024-09-17 19:21:38,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-17 19:21:38,188 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-17 19:21:38,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:38,188 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-17 19:21:38,189 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.125) internal successors, (34), 19 states have internal predecessors, (34), 10 states have call successors, (11), 1 states have call predecessors, (11), 7 states have return successors, (16), 6 states have call predecessors, (16), 10 states have call successors, (16) [2024-09-17 19:21:38,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-17 19:21:38,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-17 19:21:38,190 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:38,190 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:38,207 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-17 19:21:38,395 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:38,396 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:38,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:38,396 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-17 19:21:38,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:38,398 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095155908] [2024-09-17 19:21:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:38,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:38,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:38,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:38,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,530 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:38,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:38,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:38,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,622 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:38,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,643 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:38,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:38,670 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-17 19:21:38,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095155908] [2024-09-17 19:21:38,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095155908] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:38,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [246411781] [2024-09-17 19:21:38,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:21:38,671 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:38,671 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:38,673 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) [2024-09-17 19:21:38,674 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-17 19:21:38,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-17 19:21:38,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:38,730 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-17 19:21:38,732 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:38,815 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-17 19:21:38,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:39,875 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-17 19:21:39,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [246411781] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:39,877 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:39,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-17 19:21:39,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325995158] [2024-09-17 19:21:39,877 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:39,878 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:21:39,878 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:39,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:21:39,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-17 19:21:39,879 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-17 19:21:39,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:39,966 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-17 19:21:39,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-17 19:21:39,967 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) Word has length 43 [2024-09-17 19:21:39,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:39,968 INFO L225 Difference]: With dead ends: 37 [2024-09-17 19:21:39,968 INFO L226 Difference]: Without dead ends: 33 [2024-09-17 19:21:39,968 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 83 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2024-09-17 19:21:39,969 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 67 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 68 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 67 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:39,969 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 106 Invalid, 68 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 67 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:39,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-17 19:21:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-17 19:21:39,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 20 states have (on average 1.05) internal successors, (21), 21 states have internal predecessors, (21), 4 states have call successors, (4), 3 states have call predecessors, (4), 8 states have return successors, (9), 8 states have call predecessors, (9), 3 states have call successors, (9) [2024-09-17 19:21:39,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-17 19:21:39,975 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-17 19:21:39,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:39,975 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-17 19:21:39,975 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.111111111111111) internal successors, (38), 21 states have internal predecessors, (38), 11 states have call successors, (12), 1 states have call predecessors, (12), 8 states have return successors, (19), 7 states have call predecessors, (19), 11 states have call successors, (19) [2024-09-17 19:21:39,976 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:39,976 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-17 19:21:39,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-17 19:21:39,977 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:39,977 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:39,995 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-17 19:21:40,181 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-09-17 19:21:40,182 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:40,182 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:40,182 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-17 19:21:40,182 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:40,183 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687131854] [2024-09-17 19:21:40,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:40,183 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:40,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:40,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,347 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,394 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,490 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,514 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:40,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:40,543 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-17 19:21:40,544 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687131854] [2024-09-17 19:21:40,544 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687131854] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:40,544 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274153800] [2024-09-17 19:21:40,544 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:21:40,544 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:40,544 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:40,546 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) [2024-09-17 19:21:40,548 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-17 19:21:40,618 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-17 19:21:40,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:40,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-17 19:21:40,621 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-17 19:21:40,709 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:42,071 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-17 19:21:42,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274153800] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:42,072 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:42,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-17 19:21:42,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101344977] [2024-09-17 19:21:42,072 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:42,072 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-17 19:21:42,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:42,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-17 19:21:42,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-17 19:21:42,074 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-17 19:21:42,146 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:42,146 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-17 19:21:42,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-17 19:21:42,147 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) Word has length 49 [2024-09-17 19:21:42,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:42,148 INFO L225 Difference]: With dead ends: 40 [2024-09-17 19:21:42,148 INFO L226 Difference]: Without dead ends: 36 [2024-09-17 19:21:42,148 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 95 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:21:42,149 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 55 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 55 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:42,149 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [45 Valid, 93 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 55 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:42,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-17 19:21:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-17 19:21:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 23 states have internal predecessors, (23), 4 states have call successors, (4), 3 states have call predecessors, (4), 9 states have return successors, (10), 9 states have call predecessors, (10), 3 states have call successors, (10) [2024-09-17 19:21:42,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-17 19:21:42,155 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-17 19:21:42,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:42,155 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-17 19:21:42,155 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.1) internal successors, (42), 23 states have internal predecessors, (42), 12 states have call successors, (13), 1 states have call predecessors, (13), 9 states have return successors, (22), 8 states have call predecessors, (22), 12 states have call successors, (22) [2024-09-17 19:21:42,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:42,156 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-17 19:21:42,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-17 19:21:42,157 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:42,157 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:42,170 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-17 19:21:42,357 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:42,358 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:42,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:42,358 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-17 19:21:42,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:42,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508957367] [2024-09-17 19:21:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:42,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:42,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,583 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,676 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-17 19:21:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508957367] [2024-09-17 19:21:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508957367] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:42,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116921156] [2024-09-17 19:21:42,723 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:21:42,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:42,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:42,725 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) [2024-09-17 19:21:42,726 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-17 19:21:42,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:42,813 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-17 19:21:42,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-17 19:21:42,886 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:44,619 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-17 19:21:44,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116921156] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:44,619 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:44,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-17 19:21:44,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924623251] [2024-09-17 19:21:44,619 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:44,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-17 19:21:44,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:44,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-17 19:21:44,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:21:44,622 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-17 19:21:44,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:44,717 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-17 19:21:44,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-17 19:21:44,718 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) Word has length 55 [2024-09-17 19:21:44,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:44,719 INFO L225 Difference]: With dead ends: 43 [2024-09-17 19:21:44,719 INFO L226 Difference]: Without dead ends: 39 [2024-09-17 19:21:44,720 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 107 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2024-09-17 19:21:44,720 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 48 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:44,720 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [58 Valid, 118 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:21:44,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-17 19:21:44,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-17 19:21:44,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 25 states have internal predecessors, (25), 4 states have call successors, (4), 3 states have call predecessors, (4), 10 states have return successors, (11), 10 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-17 19:21:44,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-17 19:21:44,729 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-17 19:21:44,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:44,730 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-17 19:21:44,730 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.090909090909091) internal successors, (46), 25 states have internal predecessors, (46), 13 states have call successors, (14), 1 states have call predecessors, (14), 10 states have return successors, (25), 9 states have call predecessors, (25), 13 states have call successors, (25) [2024-09-17 19:21:44,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:44,730 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-17 19:21:44,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-17 19:21:44,731 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:44,731 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:44,748 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-17 19:21:44,935 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:44,936 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:44,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:44,936 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-17 19:21:44,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:44,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137955247] [2024-09-17 19:21:44,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:44,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:44,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:45,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,282 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,316 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,344 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,363 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:45,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:45,392 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-17 19:21:45,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:45,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137955247] [2024-09-17 19:21:45,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137955247] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:45,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795565454] [2024-09-17 19:21:45,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:21:45,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:45,393 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:45,395 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) [2024-09-17 19:21:45,396 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-17 19:21:45,503 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:21:45,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:45,504 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-17 19:21:45,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:45,602 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-17 19:21:45,602 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:47,973 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-17 19:21:47,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795565454] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:47,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:47,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-17 19:21:47,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271217903] [2024-09-17 19:21:47,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:47,974 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-17 19:21:47,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:47,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-17 19:21:47,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-17 19:21:47,977 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-17 19:21:48,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:48,088 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-17 19:21:48,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-17 19:21:48,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) Word has length 61 [2024-09-17 19:21:48,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:48,090 INFO L225 Difference]: With dead ends: 46 [2024-09-17 19:21:48,090 INFO L226 Difference]: Without dead ends: 42 [2024-09-17 19:21:48,091 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 119 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:21:48,091 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 54 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:48,092 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 121 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-17 19:21:48,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-17 19:21:48,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-17 19:21:48,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 27 states have internal predecessors, (27), 4 states have call successors, (4), 3 states have call predecessors, (4), 11 states have return successors, (12), 11 states have call predecessors, (12), 3 states have call successors, (12) [2024-09-17 19:21:48,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-17 19:21:48,098 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-17 19:21:48,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:48,098 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-17 19:21:48,098 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 27 states have internal predecessors, (50), 14 states have call successors, (15), 1 states have call predecessors, (15), 11 states have return successors, (28), 10 states have call predecessors, (28), 14 states have call successors, (28) [2024-09-17 19:21:48,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:48,099 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-17 19:21:48,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-17 19:21:48,100 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:48,100 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:48,115 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-17 19:21:48,304 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:48,305 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:48,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:48,305 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-17 19:21:48,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:48,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858967234] [2024-09-17 19:21:48,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:48,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:48,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:48,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,384 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:48,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,459 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,520 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,688 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,727 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:48,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:48,864 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-17 19:21:48,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858967234] [2024-09-17 19:21:48,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1858967234] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:48,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615931380] [2024-09-17 19:21:48,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:21:48,864 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:48,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:48,866 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) [2024-09-17 19:21:48,868 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-17 19:21:49,008 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-17 19:21:49,008 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:49,009 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-17 19:21:49,010 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:49,086 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-17 19:21:49,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-17 19:21:52,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615931380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:52,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:52,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-17 19:21:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053446704] [2024-09-17 19:21:52,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:52,343 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-17 19:21:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-17 19:21:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-17 19:21:52,345 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-17 19:21:52,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:52,463 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-17 19:21:52,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-17 19:21:52,464 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) Word has length 67 [2024-09-17 19:21:52,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:52,467 INFO L225 Difference]: With dead ends: 49 [2024-09-17 19:21:52,467 INFO L226 Difference]: Without dead ends: 45 [2024-09-17 19:21:52,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 131 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:21:52,469 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 65 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 71 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 71 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:52,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 112 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 71 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:21:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-17 19:21:52,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-17 19:21:52,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 29 states have internal predecessors, (29), 4 states have call successors, (4), 3 states have call predecessors, (4), 12 states have return successors, (13), 12 states have call predecessors, (13), 3 states have call successors, (13) [2024-09-17 19:21:52,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-17 19:21:52,482 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-17 19:21:52,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:52,482 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-17 19:21:52,483 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.076923076923077) internal successors, (54), 29 states have internal predecessors, (54), 15 states have call successors, (16), 1 states have call predecessors, (16), 12 states have return successors, (31), 11 states have call predecessors, (31), 15 states have call successors, (31) [2024-09-17 19:21:52,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:52,483 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-17 19:21:52,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-17 19:21:52,488 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:52,488 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:52,506 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-17 19:21:52,688 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-17 19:21:52,689 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:52,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:52,689 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-17 19:21:52,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:52,690 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1353201190] [2024-09-17 19:21:52,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:52,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:52,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:52,800 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:52,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:52,803 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:52,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:52,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:52,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:52,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,079 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,131 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:53,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:53,306 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-17 19:21:53,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1353201190] [2024-09-17 19:21:53,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1353201190] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:53,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [596381810] [2024-09-17 19:21:53,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:21:53,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:53,308 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:53,309 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) [2024-09-17 19:21:53,311 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-17 19:21:53,507 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:21:53,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:53,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-17 19:21:53,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:53,613 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-17 19:21:53,615 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:21:58,047 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-17 19:21:58,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [596381810] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:21:58,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:21:58,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-17 19:21:58,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034341516] [2024-09-17 19:21:58,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:21:58,049 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-17 19:21:58,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:21:58,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-17 19:21:58,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-17 19:21:58,051 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-17 19:21:58,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:21:58,191 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-17 19:21:58,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-17 19:21:58,192 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) Word has length 73 [2024-09-17 19:21:58,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:21:58,192 INFO L225 Difference]: With dead ends: 52 [2024-09-17 19:21:58,193 INFO L226 Difference]: Without dead ends: 48 [2024-09-17 19:21:58,193 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 143 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:21:58,194 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 64 mSDsluCounter, 123 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:21:58,194 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [77 Valid, 136 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:21:58,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-17 19:21:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-17 19:21:58,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 31 states have internal predecessors, (31), 4 states have call successors, (4), 3 states have call predecessors, (4), 13 states have return successors, (14), 13 states have call predecessors, (14), 3 states have call successors, (14) [2024-09-17 19:21:58,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-17 19:21:58,200 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-17 19:21:58,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:21:58,200 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-17 19:21:58,201 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0714285714285716) internal successors, (58), 31 states have internal predecessors, (58), 16 states have call successors, (17), 1 states have call predecessors, (17), 13 states have return successors, (34), 12 states have call predecessors, (34), 16 states have call successors, (34) [2024-09-17 19:21:58,201 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:58,201 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-17 19:21:58,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-17 19:21:58,204 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:21:58,204 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:21:58,217 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-17 19:21:58,405 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-17 19:21:58,405 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:21:58,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:21:58,405 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-17 19:21:58,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:21:58,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635399526] [2024-09-17 19:21:58,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:21:58,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:21:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:21:58,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,509 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:21:58,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,603 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,759 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,871 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,955 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:58,990 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:58,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:59,018 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:59,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:59,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:59,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:59,064 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:21:59,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:21:59,099 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-17 19:21:59,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:21:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635399526] [2024-09-17 19:21:59,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635399526] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:21:59,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016180352] [2024-09-17 19:21:59,099 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-17 19:21:59,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:21:59,100 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:21:59,101 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) [2024-09-17 19:21:59,102 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-17 19:21:59,369 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-17 19:21:59,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:21:59,371 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-17 19:21:59,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:21:59,474 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-17 19:21:59,474 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:22:05,101 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-17 19:22:05,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016180352] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:22:05,101 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:22:05,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-17 19:22:05,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891277755] [2024-09-17 19:22:05,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:22:05,103 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-17 19:22:05,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:05,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-17 19:22:05,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-17 19:22:05,105 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-17 19:22:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:05,260 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-17 19:22:05,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-17 19:22:05,260 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) Word has length 79 [2024-09-17 19:22:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:05,261 INFO L225 Difference]: With dead ends: 55 [2024-09-17 19:22:05,261 INFO L226 Difference]: Without dead ends: 51 [2024-09-17 19:22:05,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 155 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1311, Unknown=0, NotChecked=0, Total=1892 [2024-09-17 19:22:05,262 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 99 mSDsluCounter, 133 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:05,263 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 146 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:22:05,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-17 19:22:05,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-17 19:22:05,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 32 states have (on average 1.03125) internal successors, (33), 33 states have internal predecessors, (33), 4 states have call successors, (4), 3 states have call predecessors, (4), 14 states have return successors, (15), 14 states have call predecessors, (15), 3 states have call successors, (15) [2024-09-17 19:22:05,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-17 19:22:05,270 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-17 19:22:05,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:05,271 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-17 19:22:05,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.066666666666667) internal successors, (62), 33 states have internal predecessors, (62), 17 states have call successors, (18), 1 states have call predecessors, (18), 14 states have return successors, (37), 13 states have call predecessors, (37), 17 states have call successors, (37) [2024-09-17 19:22:05,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:05,271 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-17 19:22:05,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-17 19:22:05,272 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:22:05,272 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:22:05,285 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-17 19:22:05,472 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:05,472 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:22:05,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-17 19:22:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:22:05,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279679540] [2024-09-17 19:22:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:22:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:22:05,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:22:05,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:22:05,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,661 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:05,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,741 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:05,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:05,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:05,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:05,953 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,007 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,085 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:06,228 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-17 19:22:06,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:22:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279679540] [2024-09-17 19:22:06,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [279679540] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:22:06,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731203114] [2024-09-17 19:22:06,229 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-17 19:22:06,229 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:06,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:22:06,231 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) [2024-09-17 19:22:06,233 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-17 19:22:06,601 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-17 19:22:06,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:22:06,603 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-17 19:22:06,605 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:22:06,735 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-17 19:22:06,735 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:22:13,906 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-17 19:22:13,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1731203114] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:22:13,907 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:22:13,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-17 19:22:13,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389400095] [2024-09-17 19:22:13,907 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:22:13,908 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-17 19:22:13,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:13,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-17 19:22:13,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-17 19:22:13,910 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-17 19:22:14,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:14,106 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-17 19:22:14,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-17 19:22:14,107 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) Word has length 85 [2024-09-17 19:22:14,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:14,108 INFO L225 Difference]: With dead ends: 58 [2024-09-17 19:22:14,108 INFO L226 Difference]: Without dead ends: 54 [2024-09-17 19:22:14,109 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 167 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=1495, Unknown=0, NotChecked=0, Total=2162 [2024-09-17 19:22:14,110 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 130 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:14,110 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 162 Invalid, 130 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:22:14,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-17 19:22:14,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-17 19:22:14,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 35 states have internal predecessors, (35), 4 states have call successors, (4), 3 states have call predecessors, (4), 15 states have return successors, (16), 15 states have call predecessors, (16), 3 states have call successors, (16) [2024-09-17 19:22:14,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-17 19:22:14,118 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-17 19:22:14,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:14,119 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-17 19:22:14,119 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.0625) internal successors, (66), 35 states have internal predecessors, (66), 18 states have call successors, (19), 1 states have call predecessors, (19), 15 states have return successors, (40), 14 states have call predecessors, (40), 18 states have call successors, (40) [2024-09-17 19:22:14,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:14,119 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-17 19:22:14,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-17 19:22:14,120 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:22:14,120 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:22:14,139 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-17 19:22:14,321 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-09-17 19:22:14,322 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:22:14,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:14,322 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-17 19:22:14,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:22:14,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2083452118] [2024-09-17 19:22:14,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:22:14,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:22:14,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:22:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:22:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,774 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,832 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,878 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,924 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:14,996 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:15,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:15,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,094 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:15,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,126 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-17 19:22:15,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:22:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2083452118] [2024-09-17 19:22:15,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2083452118] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:22:15,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867356532] [2024-09-17 19:22:15,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-17 19:22:15,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:15,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:22:15,129 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) [2024-09-17 19:22:15,130 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-17 19:22:15,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:15,595 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-17 19:22:15,596 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:22:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-17 19:22:15,699 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:22:24,805 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-17 19:22:24,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867356532] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:22:24,805 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:22:24,806 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-17 19:22:24,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330053456] [2024-09-17 19:22:24,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:22:24,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:22:24,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:24,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:22:24,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:22:24,807 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-17 19:22:24,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:24,970 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-17 19:22:24,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-17 19:22:24,971 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) Word has length 91 [2024-09-17 19:22:24,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:24,972 INFO L225 Difference]: With dead ends: 61 [2024-09-17 19:22:24,972 INFO L226 Difference]: Without dead ends: 57 [2024-09-17 19:22:24,973 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 179 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1691, Unknown=0, NotChecked=0, Total=2450 [2024-09-17 19:22:24,973 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 84 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 165 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:24,974 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 165 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:22:24,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-17 19:22:24,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-17 19:22:24,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 37 states have internal predecessors, (37), 4 states have call successors, (4), 3 states have call predecessors, (4), 16 states have return successors, (17), 16 states have call predecessors, (17), 3 states have call successors, (17) [2024-09-17 19:22:24,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-17 19:22:24,984 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-17 19:22:24,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:24,984 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-17 19:22:24,984 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0588235294117645) internal successors, (70), 37 states have internal predecessors, (70), 19 states have call successors, (20), 1 states have call predecessors, (20), 16 states have return successors, (43), 15 states have call predecessors, (43), 19 states have call successors, (43) [2024-09-17 19:22:24,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:24,985 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-17 19:22:24,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-17 19:22:24,986 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:22:24,986 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:22:25,001 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-17 19:22:25,186 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-17 19:22:25,186 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:22:25,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:25,187 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-17 19:22:25,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:22:25,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1950505536] [2024-09-17 19:22:25,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:22:25,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:22:25,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,293 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:22:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:22:25,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,398 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,483 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,693 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,773 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,874 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,918 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,961 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:25,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:25,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:26,021 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:26,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:26,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:26,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:26,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:26,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:26,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:26,129 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-17 19:22:26,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:22:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1950505536] [2024-09-17 19:22:26,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1950505536] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:22:26,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993581380] [2024-09-17 19:22:26,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-17 19:22:26,130 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:26,130 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:22:26,132 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) [2024-09-17 19:22:26,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-17 19:22:26,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-17 19:22:26,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:22:26,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-17 19:22:26,637 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:22:26,739 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-17 19:22:26,739 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:22:37,921 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-17 19:22:37,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993581380] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:22:37,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:22:37,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-17 19:22:37,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342995836] [2024-09-17 19:22:37,922 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:22:37,922 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-17 19:22:37,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:37,923 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-17 19:22:37,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-17 19:22:37,923 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-17 19:22:38,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:38,096 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-17 19:22:38,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-17 19:22:38,097 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) Word has length 97 [2024-09-17 19:22:38,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:38,098 INFO L225 Difference]: With dead ends: 64 [2024-09-17 19:22:38,098 INFO L226 Difference]: Without dead ends: 60 [2024-09-17 19:22:38,099 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 191 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-17 19:22:38,099 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 104 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:38,100 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [121 Valid, 180 Invalid, 147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:22:38,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-17 19:22:38,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-17 19:22:38,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 39 states have internal predecessors, (39), 4 states have call successors, (4), 3 states have call predecessors, (4), 17 states have return successors, (18), 17 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-17 19:22:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-17 19:22:38,106 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-17 19:22:38,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:38,106 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-17 19:22:38,106 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 38 states have internal predecessors, (73), 19 states have call successors, (20), 1 states have call predecessors, (20), 17 states have return successors, (45), 16 states have call predecessors, (45), 19 states have call successors, (45) [2024-09-17 19:22:38,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:38,106 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-17 19:22:38,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-17 19:22:38,108 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:22:38,108 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:22:38,128 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-17 19:22:38,308 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-17 19:22:38,308 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:22:38,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:38,309 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-17 19:22:38,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:22:38,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145854652] [2024-09-17 19:22:38,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:22:38,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:22:38,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,448 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:22:38,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:22:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,660 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:38,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,775 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:38,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:38,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:38,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,204 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,353 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,505 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,749 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:39,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:39,822 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-17 19:22:39,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:22:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145854652] [2024-09-17 19:22:39,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145854652] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:22:39,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599404535] [2024-09-17 19:22:39,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-17 19:22:39,823 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:39,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:22:39,825 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) [2024-09-17 19:22:39,827 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-17 19:22:40,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-17 19:22:40,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:22:40,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-17 19:22:40,500 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:22:40,581 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-17 19:22:40,582 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-17 19:22:41,438 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-17 19:22:41,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599404535] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-17 19:22:41,438 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-17 19:22:41,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-17 19:22:41,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062752312] [2024-09-17 19:22:41,438 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-17 19:22:41,439 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-17 19:22:41,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:41,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-17 19:22:41,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-17 19:22:41,440 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-17 19:22:42,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:42,352 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-17 19:22:42,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-17 19:22:42,352 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) Word has length 103 [2024-09-17 19:22:42,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:42,353 INFO L225 Difference]: With dead ends: 67 [2024-09-17 19:22:42,353 INFO L226 Difference]: Without dead ends: 63 [2024-09-17 19:22:42,355 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-17 19:22:42,355 INFO L434 NwaCegarLoop]: 25 mSDtfsCounter, 33 mSDsluCounter, 803 mSDsCounter, 0 mSdLazyCounter, 1271 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 828 SdHoareTripleChecker+Invalid, 1271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1271 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:42,356 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 828 Invalid, 1271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1271 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-17 19:22:42,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-17 19:22:42,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-17 19:22:42,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 40 states have (on average 1.025) internal successors, (41), 41 states have internal predecessors, (41), 4 states have call successors, (4), 3 states have call predecessors, (4), 18 states have return successors, (19), 18 states have call predecessors, (19), 3 states have call successors, (19) [2024-09-17 19:22:42,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-17 19:22:42,362 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-17 19:22:42,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:42,362 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-17 19:22:42,363 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.135135135135135) internal successors, (42), 21 states have internal predecessors, (42), 1 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 17 states have call predecessors, (18), 1 states have call successors, (18) [2024-09-17 19:22:42,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:42,363 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-17 19:22:42,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-17 19:22:42,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-17 19:22:42,364 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-17 19:22:42,384 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-09-17 19:22:42,568 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-17 19:22:42,569 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-17 19:22:42,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:42,569 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-17 19:22:42,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-17 19:22:42,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664974700] [2024-09-17 19:22:42,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-17 19:22:42,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-17 19:22:42,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:42,744 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-17 19:22:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:42,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-17 19:22:42,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:42,923 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:42,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,039 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,134 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,220 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,422 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,552 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,596 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,636 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,757 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,778 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-17 19:22:43,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-17 19:22:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-17 19:22:43,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-17 19:22:43,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664974700] [2024-09-17 19:22:43,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664974700] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-17 19:22:43,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781947011] [2024-09-17 19:22:43,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-17 19:22:43,809 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:43,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-17 19:22:43,810 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) [2024-09-17 19:22:43,812 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-17 19:22:44,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-17 19:22:44,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-17 19:22:44,515 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-17 19:22:44,516 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-17 19:22:44,648 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-17 19:22:44,648 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-17 19:22:44,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781947011] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-17 19:22:44,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-17 19:22:44,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-17 19:22:44,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291920637] [2024-09-17 19:22:44,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-17 19:22:44,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-17 19:22:44,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-17 19:22:44,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-17 19:22:44,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-17 19:22:44,650 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-17 19:22:44,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-17 19:22:44,850 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-17 19:22:44,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-17 19:22:44,851 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) Word has length 109 [2024-09-17 19:22:44,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-17 19:22:44,851 INFO L225 Difference]: With dead ends: 63 [2024-09-17 19:22:44,851 INFO L226 Difference]: Without dead ends: 0 [2024-09-17 19:22:44,852 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 141 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2024-09-17 19:22:44,852 INFO L434 NwaCegarLoop]: 40 mSDtfsCounter, 2 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 108 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-17 19:22:44,853 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 175 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 108 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-17 19:22:44,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-17 19:22:44,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-17 19:22:44,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-17 19:22:44,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-17 19:22:44,853 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 109 [2024-09-17 19:22:44,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-17 19:22:44,853 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-17 19:22:44,854 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.05) internal successors, (41), 21 states have internal predecessors, (41), 3 states have call successors, (4), 1 states have call predecessors, (4), 18 states have return successors, (18), 18 states have call predecessors, (18), 3 states have call successors, (18) [2024-09-17 19:22:44,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-17 19:22:44,854 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-17 19:22:44,854 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-17 19:22:44,857 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-17 19:22:44,873 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-17 19:22:45,057 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,17 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-17 19:22:45,060 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-17 19:22:45,062 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-17 19:22:46,108 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-17 19:22:46,137 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 17.09 07:22:46 BoogieIcfgContainer [2024-09-17 19:22:46,137 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-17 19:22:46,137 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-17 19:22:46,138 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-17 19:22:46,138 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-17 19:22:46,138 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 17.09 07:21:33" (3/4) ... [2024-09-17 19:22:46,141 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-17 19:22:46,190 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-17 19:22:46,190 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-17 19:22:46,190 INFO L158 Benchmark]: Toolchain (without parser) took 73699.90ms. Allocated memory was 157.3MB in the beginning and 750.8MB in the end (delta: 593.5MB). Free memory was 100.5MB in the beginning and 649.6MB in the end (delta: -549.2MB). Peak memory consumption was 46.4MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,191 INFO L158 Benchmark]: CDTParser took 0.22ms. Allocated memory is still 157.3MB. Free memory is still 116.6MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:22:46,191 INFO L158 Benchmark]: CACSL2BoogieTranslator took 230.77ms. Allocated memory is still 157.3MB. Free memory was 100.1MB in the beginning and 89.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,191 INFO L158 Benchmark]: Boogie Procedure Inliner took 19.46ms. Allocated memory is still 157.3MB. Free memory was 89.2MB in the beginning and 88.4MB in the end (delta: 757.4kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-17 19:22:46,193 INFO L158 Benchmark]: Boogie Preprocessor took 38.94ms. Allocated memory is still 157.3MB. Free memory was 88.4MB in the beginning and 86.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,193 INFO L158 Benchmark]: RCFGBuilder took 310.63ms. Allocated memory is still 157.3MB. Free memory was 86.8MB in the beginning and 75.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,193 INFO L158 Benchmark]: TraceAbstraction took 73041.09ms. Allocated memory was 157.3MB in the beginning and 750.8MB in the end (delta: 593.5MB). Free memory was 74.9MB in the beginning and 652.8MB in the end (delta: -577.8MB). Peak memory consumption was 403.0MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,194 INFO L158 Benchmark]: Witness Printer took 52.56ms. Allocated memory is still 750.8MB. Free memory was 652.8MB in the beginning and 649.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-17 19:22:46,198 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22ms. Allocated memory is still 157.3MB. Free memory is still 116.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 230.77ms. Allocated memory is still 157.3MB. Free memory was 100.1MB in the beginning and 89.5MB in the end (delta: 10.6MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 19.46ms. Allocated memory is still 157.3MB. Free memory was 89.2MB in the beginning and 88.4MB in the end (delta: 757.4kB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 38.94ms. Allocated memory is still 157.3MB. Free memory was 88.4MB in the beginning and 86.8MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 310.63ms. Allocated memory is still 157.3MB. Free memory was 86.8MB in the beginning and 75.4MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 73041.09ms. Allocated memory was 157.3MB in the beginning and 750.8MB in the end (delta: 593.5MB). Free memory was 74.9MB in the beginning and 652.8MB in the end (delta: -577.8MB). Peak memory consumption was 403.0MB. Max. memory is 16.1GB. * Witness Printer took 52.56ms. Allocated memory is still 750.8MB. Free memory was 652.8MB in the beginning and 649.6MB in the end (delta: 3.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 15]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 4 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 71.9s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 3.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 954 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 786 mSDsluCounter, 2693 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2429 mSDsCounter, 258 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2419 IncrementalHoareTripleChecker+Invalid, 2677 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 258 mSolverCounterUnsat, 264 mSDtfsCounter, 2419 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2634 GetRequests, 1967 SyntacticMatches, 120 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=63occurred in iteration=16, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 61.1s InterpolantComputationTime, 2061 NumberOfCodeBlocks, 2061 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2928 ConstructedInterpolants, 0 QuantifiedInterpolants, 8018 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2688 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 6160/13088 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id. Ensures: ((((((((((((((((((3 == \result) && (\old(x) == 3)) || (15 < \old(x))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((2 == \result) && (\old(x) == 2))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\result == 0) && (\old(x) == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-17 19:22:46,233 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE