./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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 27b49876 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_i20_o20-1.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 c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --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-27b4987-m [2024-09-21 12:29:37,103 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-21 12:29:37,168 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-21 12:29:37,175 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-21 12:29:37,176 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-21 12:29:37,207 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-21 12:29:37,208 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-21 12:29:37,209 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-21 12:29:37,209 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-21 12:29:37,209 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-21 12:29:37,210 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-21 12:29:37,210 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-21 12:29:37,211 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-21 12:29:37,214 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-21 12:29:37,215 INFO L153 SettingsManager]: * Use SBE=true [2024-09-21 12:29:37,215 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-21 12:29:37,215 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-21 12:29:37,215 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-21 12:29:37,216 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-21 12:29:37,216 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-21 12:29:37,216 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-21 12:29:37,217 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-21 12:29:37,217 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-21 12:29:37,217 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-21 12:29:37,218 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-21 12:29:37,218 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-21 12:29:37,219 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-21 12:29:37,219 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-21 12:29:37,219 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-21 12:29:37,219 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-21 12:29:37,220 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-21 12:29:37,220 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-21 12:29:37,220 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:29:37,220 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-21 12:29:37,220 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-21 12:29:37,221 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-21 12:29:37,221 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-21 12:29:37,221 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-21 12:29:37,221 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-21 12:29:37,221 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-21 12:29:37,222 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-21 12:29:37,223 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-21 12:29:37,223 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 Applying setting for plugin de.uni_freiburg.informatik.ultimate.boogie.procedureinliner: Inline calls to implemented procedures -> NEVER Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Generate GraphML witnesses -> false [2024-09-21 12:29:37,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-21 12:29:37,483 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-21 12:29:37,486 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-21 12:29:37,487 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-21 12:29:37,487 INFO L274 PluginConnector]: CDTParser initialized [2024-09-21 12:29:37,488 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-21 12:29:38,921 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-21 12:29:39,101 INFO L384 CDTParser]: Found 1 translation units. [2024-09-21 12:29:39,102 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-21 12:29:39,112 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/40ba7c5e0/9ce0dc65901b43e8a383f5a8432b017b/FLAGf5c3ae47d [2024-09-21 12:29:39,126 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/40ba7c5e0/9ce0dc65901b43e8a383f5a8432b017b [2024-09-21 12:29:39,130 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-21 12:29:39,132 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-21 12:29:39,135 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-21 12:29:39,135 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-21 12:29:39,141 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-21 12:29:39,144 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,145 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@603c6430 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39, skipping insertion in model container [2024-09-21 12:29:39,145 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,164 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-21 12:29:39,329 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_i20_o20-1.c[454,467] [2024-09-21 12:29:39,333 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:29:39,346 INFO L200 MainTranslator]: Completed pre-run [2024-09-21 12:29:39,360 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_i20_o20-1.c[454,467] [2024-09-21 12:29:39,361 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-21 12:29:39,379 INFO L204 MainTranslator]: Completed translation [2024-09-21 12:29:39,380 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39 WrapperNode [2024-09-21 12:29:39,380 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-21 12:29:39,381 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-21 12:29:39,381 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-21 12:29:39,382 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-21 12:29:39,388 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,395 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,401 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 0, calls inlined = 0, statements flattened = 0 [2024-09-21 12:29:39,402 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-21 12:29:39,402 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-21 12:29:39,403 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-21 12:29:39,403 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-21 12:29:39,412 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,412 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,413 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,424 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]. [2024-09-21 12:29:39,425 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,425 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,431 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,432 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,433 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,434 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,435 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-21 12:29:39,436 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-21 12:29:39,436 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-21 12:29:39,436 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-21 12:29:39,437 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (1/1) ... [2024-09-21 12:29:39,442 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-21 12:29:39,454 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:39,468 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) [2024-09-21 12:29:39,470 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 [2024-09-21 12:29:39,512 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-21 12:29:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2024-09-21 12:29:39,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2024-09-21 12:29:39,513 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-21 12:29:39,513 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-21 12:29:39,514 INFO L130 BoogieDeclarations]: Found specification of procedure main [2024-09-21 12:29:39,514 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2024-09-21 12:29:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-21 12:29:39,516 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-21 12:29:39,516 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-21 12:29:39,590 INFO L242 CfgBuilder]: Building ICFG [2024-09-21 12:29:39,593 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-21 12:29:39,682 INFO L? ?]: Removed 4 outVars from TransFormulas that were not future-live. [2024-09-21 12:29:39,682 INFO L291 CfgBuilder]: Performing block encoding [2024-09-21 12:29:39,703 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-21 12:29:39,704 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-21 12:29:39,705 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:39 BoogieIcfgContainer [2024-09-21 12:29:39,705 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-21 12:29:39,707 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-21 12:29:39,708 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-21 12:29:39,711 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-21 12:29:39,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.09 12:29:39" (1/3) ... [2024-09-21 12:29:39,712 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb1dd2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:29:39, skipping insertion in model container [2024-09-21 12:29:39,712 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.09 12:29:39" (2/3) ... [2024-09-21 12:29:39,713 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@bb1dd2c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.09 12:29:39, skipping insertion in model container [2024-09-21 12:29:39,713 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:39" (3/3) ... [2024-09-21 12:29:39,714 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-21 12:29:39,736 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-21 12:29:39,736 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-21 12:29:39,802 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-21 12:29:39,808 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;@325f3ba4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-21 12:29:39,809 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-21 12:29:39,813 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) [2024-09-21 12:29:39,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-09-21 12:29:39,822 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:39,822 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:39,823 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:39,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:39,827 INFO L85 PathProgramCache]: Analyzing trace with hash 2082045565, now seen corresponding path program 1 times [2024-09-21 12:29:39,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:39,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697264291] [2024-09-21 12:29:39,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:39,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:39,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,091 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:40,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-21 12:29:40,187 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:40,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697264291] [2024-09-21 12:29:40,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697264291] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:29:40,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-21 12:29:40,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-21 12:29:40,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575079809] [2024-09-21 12:29:40,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:29:40,195 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-21 12:29:40,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:40,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-21 12:29:40,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-21 12:29:40,222 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) [2024-09-21 12:29:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:40,296 INFO L93 Difference]: Finished difference Result 30 states and 33 transitions. [2024-09-21 12:29:40,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-21 12:29:40,299 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 [2024-09-21 12:29:40,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:40,306 INFO L225 Difference]: With dead ends: 30 [2024-09-21 12:29:40,306 INFO L226 Difference]: Without dead ends: 18 [2024-09-21 12:29:40,309 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 [2024-09-21 12:29:40,312 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 [2024-09-21 12:29:40,313 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] [2024-09-21 12:29:40,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2024-09-21 12:29:40,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2024-09-21 12:29:40,357 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) [2024-09-21 12:29:40,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2024-09-21 12:29:40,360 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2024-09-21 12:29:40,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:40,361 INFO L474 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2024-09-21 12:29:40,361 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) [2024-09-21 12:29:40,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:40,362 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2024-09-21 12:29:40,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-09-21 12:29:40,364 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:40,364 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:40,365 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-21 12:29:40,366 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:40,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:40,368 INFO L85 PathProgramCache]: Analyzing trace with hash -799337521, now seen corresponding path program 1 times [2024-09-21 12:29:40,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:40,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864396958] [2024-09-21 12:29:40,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:40,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:40,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,479 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:40,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,487 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:40,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,588 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:40,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:29:40,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:40,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864396958] [2024-09-21 12:29:40,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864396958] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:40,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [49400949] [2024-09-21 12:29:40,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:40,662 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:40,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:40,669 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) [2024-09-21 12:29:40,687 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-21 12:29:40,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:40,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-21 12:29:40,766 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:40,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-21 12:29:40,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:41,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-21 12:29:41,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [49400949] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:41,093 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:41,093 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-21 12:29:41,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328603866] [2024-09-21 12:29:41,094 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:41,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-21 12:29:41,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:41,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-21 12:29:41,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-21 12:29:41,097 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:29:41,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:41,140 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2024-09-21 12:29:41,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-21 12:29:41,141 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) Word has length 19 [2024-09-21 12:29:41,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:41,142 INFO L225 Difference]: With dead ends: 25 [2024-09-21 12:29:41,142 INFO L226 Difference]: Without dead ends: 21 [2024-09-21 12:29:41,143 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-21 12:29:41,144 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 14 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:41,144 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 50 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:29:41,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2024-09-21 12:29:41,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2024-09-21 12:29:41,150 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) [2024-09-21 12:29:41,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2024-09-21 12:29:41,152 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2024-09-21 12:29:41,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:41,153 INFO L474 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2024-09-21 12:29:41,154 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (6), 3 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-21 12:29:41,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:41,155 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2024-09-21 12:29:41,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-09-21 12:29:41,157 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:41,157 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:41,176 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:41,357 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 [2024-09-21 12:29:41,358 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:41,359 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:41,359 INFO L85 PathProgramCache]: Analyzing trace with hash -1955994435, now seen corresponding path program 2 times [2024-09-21 12:29:41,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:41,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53545794] [2024-09-21 12:29:41,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:41,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:41,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,445 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:41,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:41,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,542 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:41,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:41,580 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-21 12:29:41,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53545794] [2024-09-21 12:29:41,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53545794] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:41,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626771018] [2024-09-21 12:29:41,581 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:29:41,582 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:41,582 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:41,586 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) [2024-09-21 12:29:41,587 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-21 12:29:41,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:29:41,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:41,628 INFO L262 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-21 12:29:41,629 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:41,686 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-21 12:29:41,686 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:42,038 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-21 12:29:42,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626771018] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:42,039 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:42,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-09-21 12:29:42,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870711375] [2024-09-21 12:29:42,043 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:42,044 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-21 12:29:42,044 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:42,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-21 12:29:42,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-09-21 12:29:42,045 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:29:42,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:42,126 INFO L93 Difference]: Finished difference Result 28 states and 29 transitions. [2024-09-21 12:29:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-21 12:29:42,129 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) Word has length 25 [2024-09-21 12:29:42,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:42,130 INFO L225 Difference]: With dead ends: 28 [2024-09-21 12:29:42,130 INFO L226 Difference]: Without dead ends: 24 [2024-09-21 12:29:42,130 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 48 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:29:42,131 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 18 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:42,131 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 80 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:29:42,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2024-09-21 12:29:42,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2024-09-21 12:29:42,142 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) [2024-09-21 12:29:42,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2024-09-21 12:29:42,143 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 25 [2024-09-21 12:29:42,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:42,144 INFO L474 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2024-09-21 12:29:42,144 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (9), 4 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-21 12:29:42,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:42,145 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2024-09-21 12:29:42,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-09-21 12:29:42,159 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:42,160 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:42,174 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:42,361 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 [2024-09-21 12:29:42,361 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:42,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:42,362 INFO L85 PathProgramCache]: Analyzing trace with hash -1072241521, now seen corresponding path program 3 times [2024-09-21 12:29:42,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:42,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548349082] [2024-09-21 12:29:42,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:42,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:42,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:42,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:42,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,500 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,537 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:42,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:42,564 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-21 12:29:42,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548349082] [2024-09-21 12:29:42,565 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548349082] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:42,565 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214624437] [2024-09-21 12:29:42,565 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:29:42,565 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:42,566 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:42,567 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) [2024-09-21 12:29:42,569 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-21 12:29:42,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-21 12:29:42,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:42,614 INFO L262 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-21 12:29:42,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:42,666 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 12:29:42,666 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-21 12:29:43,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214624437] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:43,147 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:43,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-09-21 12:29:43,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563230472] [2024-09-21 12:29:43,147 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:43,148 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-21 12:29:43,148 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:43,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-21 12:29:43,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-09-21 12:29:43,149 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 12:29:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:43,231 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2024-09-21 12:29:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-21 12:29:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) Word has length 31 [2024-09-21 12:29:43,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:43,232 INFO L225 Difference]: With dead ends: 31 [2024-09-21 12:29:43,232 INFO L226 Difference]: Without dead ends: 27 [2024-09-21 12:29:43,233 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 60 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-09-21 12:29:43,235 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:43,237 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 74 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:29:43,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2024-09-21 12:29:43,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2024-09-21 12:29:43,246 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) [2024-09-21 12:29:43,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2024-09-21 12:29:43,247 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 31 [2024-09-21 12:29:43,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:43,248 INFO L474 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2024-09-21 12:29:43,248 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (12), 5 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-21 12:29:43,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2024-09-21 12:29:43,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-21 12:29:43,249 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:43,249 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:43,263 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-21 12:29:43,450 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 [2024-09-21 12:29:43,450 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:43,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:43,451 INFO L85 PathProgramCache]: Analyzing trace with hash -790562051, now seen corresponding path program 4 times [2024-09-21 12:29:43,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:43,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800998308] [2024-09-21 12:29:43,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:43,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:43,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,506 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:43,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:43,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,633 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:43,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:43,686 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-21 12:29:43,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800998308] [2024-09-21 12:29:43,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800998308] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:43,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686049614] [2024-09-21 12:29:43,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:29:43,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:43,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:43,689 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) [2024-09-21 12:29:43,691 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-21 12:29:43,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:29:43,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:43,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-21 12:29:43,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:43,808 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-21 12:29:43,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:44,572 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-21 12:29:44,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686049614] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:44,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:44,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-09-21 12:29:44,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046804862] [2024-09-21 12:29:44,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:44,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-21 12:29:44,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:44,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-21 12:29:44,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-21 12:29:44,575 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-21 12:29:44,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:44,655 INFO L93 Difference]: Finished difference Result 34 states and 35 transitions. [2024-09-21 12:29:44,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-21 12:29:44,657 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) Word has length 37 [2024-09-21 12:29:44,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:44,658 INFO L225 Difference]: With dead ends: 34 [2024-09-21 12:29:44,658 INFO L226 Difference]: Without dead ends: 30 [2024-09-21 12:29:44,658 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 72 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:29:44,659 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 36 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 70 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:44,659 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 90 Invalid, 70 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:29:44,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2024-09-21 12:29:44,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2024-09-21 12:29:44,669 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) [2024-09-21 12:29:44,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2024-09-21 12:29:44,671 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 37 [2024-09-21 12:29:44,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:44,673 INFO L474 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2024-09-21 12:29:44,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (15), 6 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-21 12:29:44,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:44,674 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2024-09-21 12:29:44,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2024-09-21 12:29:44,674 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:44,674 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:44,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-21 12:29:44,879 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 [2024-09-21 12:29:44,880 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:44,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:44,880 INFO L85 PathProgramCache]: Analyzing trace with hash 446137679, now seen corresponding path program 5 times [2024-09-21 12:29:44,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:44,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399414114] [2024-09-21 12:29:44,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:44,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:44,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:44,925 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:44,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:44,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:44,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:44,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,075 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,145 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:45,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:45,173 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-21 12:29:45,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399414114] [2024-09-21 12:29:45,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399414114] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:45,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284391690] [2024-09-21 12:29:45,174 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:29:45,174 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:45,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:45,177 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) [2024-09-21 12:29:45,179 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-21 12:29:45,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-21 12:29:45,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:45,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-21 12:29:45,240 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:45,314 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-21 12:29:45,314 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:46,412 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-21 12:29:46,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284391690] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:46,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:46,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-09-21 12:29:46,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634631530] [2024-09-21 12:29:46,413 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:46,414 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-21 12:29:46,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:46,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-21 12:29:46,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-21 12:29:46,416 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-21 12:29:46,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:46,507 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2024-09-21 12:29:46,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-21 12:29:46,508 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) Word has length 43 [2024-09-21 12:29:46,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:46,509 INFO L225 Difference]: With dead ends: 37 [2024-09-21 12:29:46,509 INFO L226 Difference]: Without dead ends: 33 [2024-09-21 12:29:46,509 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 84 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-21 12:29:46,510 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 66 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 89 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:46,510 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [74 Valid, 86 Invalid, 89 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:29:46,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2024-09-21 12:29:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2024-09-21 12:29:46,515 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) [2024-09-21 12:29:46,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2024-09-21 12:29:46,516 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 43 [2024-09-21 12:29:46,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:46,516 INFO L474 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2024-09-21 12:29:46,516 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (18), 7 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-21 12:29:46,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:46,517 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2024-09-21 12:29:46,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-09-21 12:29:46,518 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:46,518 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:46,531 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-21 12:29:46,718 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 [2024-09-21 12:29:46,719 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:46,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:46,719 INFO L85 PathProgramCache]: Analyzing trace with hash 1764409661, now seen corresponding path program 6 times [2024-09-21 12:29:46,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:46,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339892438] [2024-09-21 12:29:46,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:46,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:46,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:46,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,795 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:46,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,856 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:46,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,899 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:46,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:46,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:46,986 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:46,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,014 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:47,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-21 12:29:47,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339892438] [2024-09-21 12:29:47,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339892438] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:47,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461965287] [2024-09-21 12:29:47,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:29:47,068 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:47,068 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:47,070 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) [2024-09-21 12:29:47,071 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-21 12:29:47,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-21 12:29:47,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:47,145 INFO L262 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-21 12:29:47,147 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:47,216 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-21 12:29:47,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:48,573 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-21 12:29:48,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461965287] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:48,574 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:48,574 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-09-21 12:29:48,574 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569207032] [2024-09-21 12:29:48,574 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:48,574 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-21 12:29:48,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:48,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-21 12:29:48,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-21 12:29:48,576 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-21 12:29:48,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:48,661 INFO L93 Difference]: Finished difference Result 40 states and 41 transitions. [2024-09-21 12:29:48,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-21 12:29:48,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) Word has length 49 [2024-09-21 12:29:48,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:48,662 INFO L225 Difference]: With dead ends: 40 [2024-09-21 12:29:48,663 INFO L226 Difference]: Without dead ends: 36 [2024-09-21 12:29:48,663 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 96 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:29:48,665 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 56 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:48,665 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 92 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-21 12:29:48,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2024-09-21 12:29:48,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2024-09-21 12:29:48,670 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) [2024-09-21 12:29:48,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2024-09-21 12:29:48,671 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 49 [2024-09-21 12:29:48,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:48,671 INFO L474 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2024-09-21 12:29:48,671 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (21), 8 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-21 12:29:48,671 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:48,672 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2024-09-21 12:29:48,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2024-09-21 12:29:48,672 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:48,672 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:48,687 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:48,873 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 [2024-09-21 12:29:48,873 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:48,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:48,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1097922063, now seen corresponding path program 7 times [2024-09-21 12:29:48,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:48,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871115736] [2024-09-21 12:29:48,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:48,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:48,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:48,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:48,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:48,932 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:48,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,151 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,174 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:49,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,224 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-21 12:29:49,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:49,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871115736] [2024-09-21 12:29:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [871115736] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:49,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447761744] [2024-09-21 12:29:49,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 12:29:49,225 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:49,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:49,227 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) [2024-09-21 12:29:49,228 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-21 12:29:49,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:49,313 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-21 12:29:49,318 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:49,379 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-21 12:29:49,379 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:51,187 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-21 12:29:51,187 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [447761744] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:51,188 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:51,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-09-21 12:29:51,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217352251] [2024-09-21 12:29:51,188 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:51,188 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-21 12:29:51,188 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:51,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-21 12:29:51,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-21 12:29:51,190 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-21 12:29:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:51,297 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2024-09-21 12:29:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-21 12:29:51,298 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) Word has length 55 [2024-09-21 12:29:51,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:51,299 INFO L225 Difference]: With dead ends: 43 [2024-09-21 12:29:51,299 INFO L226 Difference]: Without dead ends: 39 [2024-09-21 12:29:51,300 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 108 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-09-21 12:29:51,301 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 81 mSDsluCounter, 103 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:51,301 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [91 Valid, 116 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:29:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2024-09-21 12:29:51,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2024-09-21 12:29:51,306 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) [2024-09-21 12:29:51,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2024-09-21 12:29:51,307 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 55 [2024-09-21 12:29:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:51,307 INFO L474 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2024-09-21 12:29:51,307 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (24), 9 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-21 12:29:51,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:51,308 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2024-09-21 12:29:51,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-21 12:29:51,309 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:51,309 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:51,326 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-21 12:29:51,513 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 [2024-09-21 12:29:51,514 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:51,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:51,514 INFO L85 PathProgramCache]: Analyzing trace with hash 401815421, now seen corresponding path program 8 times [2024-09-21 12:29:51,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:51,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113231600] [2024-09-21 12:29:51,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:51,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:51,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,577 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:51,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,579 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:51,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,663 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,725 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,813 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,872 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,893 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,913 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:51,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:51,943 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-21 12:29:51,943 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113231600] [2024-09-21 12:29:51,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113231600] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:51,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67170724] [2024-09-21 12:29:51,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:29:51,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:51,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:51,946 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) [2024-09-21 12:29:51,948 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-21 12:29:52,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:29:52,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:52,060 INFO L262 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-21 12:29:52,062 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-21 12:29:52,134 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:54,630 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-21 12:29:54,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67170724] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:54,630 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:54,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-09-21 12:29:54,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869100119] [2024-09-21 12:29:54,631 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:54,631 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 12:29:54,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:54,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 12:29:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-09-21 12:29:54,633 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-21 12:29:54,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:54,737 INFO L93 Difference]: Finished difference Result 46 states and 47 transitions. [2024-09-21 12:29:54,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-21 12:29:54,738 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) Word has length 61 [2024-09-21 12:29:54,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:54,739 INFO L225 Difference]: With dead ends: 46 [2024-09-21 12:29:54,739 INFO L226 Difference]: Without dead ends: 42 [2024-09-21 12:29:54,740 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 120 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:29:54,740 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 39 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:54,740 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 121 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:29:54,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-21 12:29:54,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-21 12:29:54,747 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) [2024-09-21 12:29:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2024-09-21 12:29:54,748 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 61 [2024-09-21 12:29:54,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:54,749 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2024-09-21 12:29:54,749 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (27), 10 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-21 12:29:54,749 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:54,750 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2024-09-21 12:29:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2024-09-21 12:29:54,752 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:54,752 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:54,769 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-21 12:29:54,952 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 [2024-09-21 12:29:54,953 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:54,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash -281594161, now seen corresponding path program 9 times [2024-09-21 12:29:54,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:54,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2029425222] [2024-09-21 12:29:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:54,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:54,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:55,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,128 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,283 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,371 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,449 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:55,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:55,479 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-21 12:29:55,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:55,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2029425222] [2024-09-21 12:29:55,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2029425222] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:55,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616421665] [2024-09-21 12:29:55,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:29:55,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:55,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:55,482 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) [2024-09-21 12:29:55,483 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-21 12:29:55,638 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-21 12:29:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:29:55,640 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-21 12:29:55,641 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:29:55,725 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-21 12:29:55,725 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:29:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-21 12:29:58,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616421665] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:29:58,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:29:58,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-09-21 12:29:58,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791136432] [2024-09-21 12:29:58,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:29:58,889 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-21 12:29:58,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:29:58,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-21 12:29:58,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-09-21 12:29:58,891 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-21 12:29:59,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:29:59,026 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2024-09-21 12:29:59,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-21 12:29:59,027 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) Word has length 67 [2024-09-21 12:29:59,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:29:59,028 INFO L225 Difference]: With dead ends: 49 [2024-09-21 12:29:59,028 INFO L226 Difference]: Without dead ends: 45 [2024-09-21 12:29:59,029 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 132 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-09-21 12:29:59,029 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 59 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:29:59,030 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [71 Valid, 144 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:29:59,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2024-09-21 12:29:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2024-09-21 12:29:59,035 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) [2024-09-21 12:29:59,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2024-09-21 12:29:59,036 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 67 [2024-09-21 12:29:59,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:29:59,040 INFO L474 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2024-09-21 12:29:59,041 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (30), 11 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-21 12:29:59,041 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:59,041 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2024-09-21 12:29:59,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2024-09-21 12:29:59,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:29:59,042 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:29:59,058 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-21 12:29:59,242 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 [2024-09-21 12:29:59,243 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:29:59,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:29:59,243 INFO L85 PathProgramCache]: Analyzing trace with hash 132537789, now seen corresponding path program 10 times [2024-09-21 12:29:59,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:29:59,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695573830] [2024-09-21 12:29:59,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:29:59,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:29:59,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,321 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:29:59,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:29:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,408 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,614 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,747 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:29:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:29:59,796 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-21 12:29:59,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:29:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695573830] [2024-09-21 12:29:59,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695573830] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:29:59,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577104425] [2024-09-21 12:29:59,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:29:59,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:29:59,796 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:29:59,798 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) [2024-09-21 12:29:59,799 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-21 12:30:00,000 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:30:00,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:00,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-21 12:30:00,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:00,099 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-21 12:30:00,099 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:04,500 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-21 12:30:04,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1577104425] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:04,501 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:04,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-09-21 12:30:04,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622466847] [2024-09-21 12:30:04,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:04,502 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-21 12:30:04,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:04,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-21 12:30:04,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-09-21 12:30:04,504 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-21 12:30:04,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:04,634 INFO L93 Difference]: Finished difference Result 52 states and 53 transitions. [2024-09-21 12:30:04,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-21 12:30:04,635 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) Word has length 73 [2024-09-21 12:30:04,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:04,636 INFO L225 Difference]: With dead ends: 52 [2024-09-21 12:30:04,636 INFO L226 Difference]: Without dead ends: 48 [2024-09-21 12:30:04,636 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 144 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 12:30:04,637 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 47 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:04,637 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 132 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:04,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-09-21 12:30:04,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-09-21 12:30:04,646 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) [2024-09-21 12:30:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2024-09-21 12:30:04,646 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 73 [2024-09-21 12:30:04,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:04,647 INFO L474 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2024-09-21 12:30:04,647 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (33), 12 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-21 12:30:04,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:04,647 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2024-09-21 12:30:04,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2024-09-21 12:30:04,648 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:04,648 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:04,662 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:04,849 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-21 12:30:04,850 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:04,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:04,850 INFO L85 PathProgramCache]: Analyzing trace with hash 2004764559, now seen corresponding path program 11 times [2024-09-21 12:30:04,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:04,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956851493] [2024-09-21 12:30:04,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:04,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:04,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,970 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:04,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:04,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,141 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,209 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,262 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,442 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,469 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:05,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:05,542 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-21 12:30:05,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956851493] [2024-09-21 12:30:05,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956851493] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:05,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584928187] [2024-09-21 12:30:05,543 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:30:05,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:05,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:05,545 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) [2024-09-21 12:30:05,546 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-21 12:30:05,843 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-21 12:30:05,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:05,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-21 12:30:05,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:05,937 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-21 12:30:05,937 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:11,435 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-21 12:30:11,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584928187] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:11,436 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:11,436 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-09-21 12:30:11,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070508562] [2024-09-21 12:30:11,436 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:11,437 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-21 12:30:11,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:11,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-21 12:30:11,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-09-21 12:30:11,438 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-21 12:30:11,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:11,572 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2024-09-21 12:30:11,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-21 12:30:11,572 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) Word has length 79 [2024-09-21 12:30:11,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:11,573 INFO L225 Difference]: With dead ends: 55 [2024-09-21 12:30:11,573 INFO L226 Difference]: Without dead ends: 51 [2024-09-21 12:30:11,574 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 156 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-09-21 12:30:11,574 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 75 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:11,575 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [89 Valid, 161 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:11,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-21 12:30:11,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-21 12:30:11,582 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) [2024-09-21 12:30:11,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2024-09-21 12:30:11,583 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 79 [2024-09-21 12:30:11,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:11,583 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2024-09-21 12:30:11,583 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (36), 13 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-21 12:30:11,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:11,583 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2024-09-21 12:30:11,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2024-09-21 12:30:11,584 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:11,584 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:11,601 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:11,785 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 [2024-09-21 12:30:11,785 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:11,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:11,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1968163843, now seen corresponding path program 12 times [2024-09-21 12:30:11,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:11,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015769264] [2024-09-21 12:30:11,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:11,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:11,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,889 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:11,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:11,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:11,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,065 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,256 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,304 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,345 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,392 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,423 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,450 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,478 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:12,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-21 12:30:12,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015769264] [2024-09-21 12:30:12,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015769264] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:12,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1398185782] [2024-09-21 12:30:12,534 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:30:12,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:12,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:12,536 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) [2024-09-21 12:30:12,538 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-21 12:30:12,843 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-21 12:30:12,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:12,845 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-21 12:30:12,847 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:12,944 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-21 12:30:12,945 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:20,097 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-21 12:30:20,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1398185782] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:20,098 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:20,098 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-09-21 12:30:20,098 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359560426] [2024-09-21 12:30:20,099 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:20,100 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-21 12:30:20,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-21 12:30:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-09-21 12:30:20,101 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-21 12:30:20,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:20,259 INFO L93 Difference]: Finished difference Result 58 states and 59 transitions. [2024-09-21 12:30:20,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-21 12:30:20,260 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) Word has length 85 [2024-09-21 12:30:20,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:20,261 INFO L225 Difference]: With dead ends: 58 [2024-09-21 12:30:20,261 INFO L226 Difference]: Without dead ends: 54 [2024-09-21 12:30:20,262 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 225 GetRequests, 168 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-09-21 12:30:20,262 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 29 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 109 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:20,262 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 171 Invalid, 109 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:20,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-21 12:30:20,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-09-21 12:30:20,269 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) [2024-09-21 12:30:20,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2024-09-21 12:30:20,270 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 85 [2024-09-21 12:30:20,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:20,271 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2024-09-21 12:30:20,271 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (39), 14 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-21 12:30:20,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:20,271 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2024-09-21 12:30:20,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2024-09-21 12:30:20,273 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:20,273 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:20,286 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-21 12:30:20,473 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 [2024-09-21 12:30:20,474 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:20,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:20,474 INFO L85 PathProgramCache]: Analyzing trace with hash 114960463, now seen corresponding path program 13 times [2024-09-21 12:30:20,474 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:20,474 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433686561] [2024-09-21 12:30:20,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:20,474 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:20,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,608 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:20,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:20,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,710 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,791 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:20,927 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:20,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,067 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,150 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,191 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,224 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,298 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:21,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,329 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-21 12:30:21,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433686561] [2024-09-21 12:30:21,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433686561] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:21,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501722607] [2024-09-21 12:30:21,330 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 12:30:21,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:21,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:21,332 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) [2024-09-21 12:30:21,334 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-21 12:30:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:21,766 INFO L262 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-21 12:30:21,768 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-21 12:30:21,857 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:30,919 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-21 12:30:30,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501722607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:30,920 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:30,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-09-21 12:30:30,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802030225] [2024-09-21 12:30:30,920 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:30,921 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-21 12:30:30,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:30,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-21 12:30:30,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-09-21 12:30:30,923 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-21 12:30:31,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:31,105 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2024-09-21 12:30:31,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-21 12:30:31,106 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) Word has length 91 [2024-09-21 12:30:31,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:31,106 INFO L225 Difference]: With dead ends: 61 [2024-09-21 12:30:31,106 INFO L226 Difference]: Without dead ends: 57 [2024-09-21 12:30:31,107 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 241 GetRequests, 180 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-09-21 12:30:31,108 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 90 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:31,108 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [106 Valid, 171 Invalid, 133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:31,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2024-09-21 12:30:31,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2024-09-21 12:30:31,114 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) [2024-09-21 12:30:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2024-09-21 12:30:31,114 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 91 [2024-09-21 12:30:31,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:31,115 INFO L474 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2024-09-21 12:30:31,115 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (19), 1 states have call predecessors, (19), 16 states have return successors, (42), 15 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-21 12:30:31,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2024-09-21 12:30:31,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2024-09-21 12:30:31,116 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:31,116 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:31,132 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-21 12:30:31,319 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 [2024-09-21 12:30:31,320 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:31,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:31,320 INFO L85 PathProgramCache]: Analyzing trace with hash -654525891, now seen corresponding path program 14 times [2024-09-21 12:30:31,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:31,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394746907] [2024-09-21 12:30:31,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:31,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:31,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,434 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:31,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,637 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,728 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:31,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:31,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,011 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,051 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,186 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:32,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:32,221 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-21 12:30:32,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:32,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394746907] [2024-09-21 12:30:32,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394746907] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:32,222 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463079340] [2024-09-21 12:30:32,222 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:30:32,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:32,222 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:32,224 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) [2024-09-21 12:30:32,226 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-21 12:30:32,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:30:32,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:32,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-21 12:30:32,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:32,838 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-21 12:30:32,838 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:30:44,061 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-21 12:30:44,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463079340] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:30:44,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:30:44,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-21 12:30:44,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548173006] [2024-09-21 12:30:44,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:30:44,062 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-21 12:30:44,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:30:44,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-21 12:30:44,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-21 12:30:44,064 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) [2024-09-21 12:30:44,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:30:44,235 INFO L93 Difference]: Finished difference Result 64 states and 65 transitions. [2024-09-21 12:30:44,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-21 12:30:44,236 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 [2024-09-21 12:30:44,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:30:44,237 INFO L225 Difference]: With dead ends: 64 [2024-09-21 12:30:44,237 INFO L226 Difference]: Without dead ends: 60 [2024-09-21 12:30:44,238 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 192 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-21 12:30:44,238 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 96 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 109 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 142 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 109 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:30:44,238 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 178 Invalid, 142 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 109 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:30:44,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-21 12:30:44,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2024-09-21 12:30:44,244 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) [2024-09-21 12:30:44,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2024-09-21 12:30:44,244 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 97 [2024-09-21 12:30:44,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:30:44,245 INFO L474 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2024-09-21 12:30:44,245 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) [2024-09-21 12:30:44,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:44,245 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2024-09-21 12:30:44,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2024-09-21 12:30:44,246 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:30:44,246 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:30:44,263 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-21 12:30:44,447 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 [2024-09-21 12:30:44,447 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:30:44,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:30:44,447 INFO L85 PathProgramCache]: Analyzing trace with hash -488711921, now seen corresponding path program 15 times [2024-09-21 12:30:44,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:30:44,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138712472] [2024-09-21 12:30:44,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:30:44,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:30:44,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:30:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:30:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:44,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,776 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:44,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:44,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:44,952 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:44,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,017 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,076 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,222 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,260 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,357 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,404 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:30:45,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:30:45,443 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-21 12:30:45,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:30:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138712472] [2024-09-21 12:30:45,444 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138712472] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:30:45,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300911613] [2024-09-21 12:30:45,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:30:45,444 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:30:45,444 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:30:45,446 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) [2024-09-21 12:30:45,448 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-21 12:30:46,127 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-21 12:30:46,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:30:46,128 INFO L262 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-21 12:30:46,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:30:46,243 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-21 12:30:46,243 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:31:00,148 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-21 12:31:00,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [300911613] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:31:00,149 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:31:00,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-09-21 12:31:00,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124131074] [2024-09-21 12:31:00,149 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:31:00,150 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-21 12:31:00,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:31:00,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-21 12:31:00,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-09-21 12:31:00,154 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-21 12:31:00,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:31:00,368 INFO L93 Difference]: Finished difference Result 67 states and 68 transitions. [2024-09-21 12:31:00,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-21 12:31:00,368 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) Word has length 103 [2024-09-21 12:31:00,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:31:00,369 INFO L225 Difference]: With dead ends: 67 [2024-09-21 12:31:00,369 INFO L226 Difference]: Without dead ends: 63 [2024-09-21 12:31:00,370 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 204 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-09-21 12:31:00,370 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 225 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:31:00,370 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [243 Valid, 211 Invalid, 237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:31:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2024-09-21 12:31:00,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2024-09-21 12:31:00,375 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) [2024-09-21 12:31:00,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 64 transitions. [2024-09-21 12:31:00,376 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 64 transitions. Word has length 103 [2024-09-21 12:31:00,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:31:00,376 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 64 transitions. [2024-09-21 12:31:00,377 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.026315789473684) internal successors, (77), 40 states have internal predecessors, (77), 20 states have call successors, (21), 1 states have call predecessors, (21), 18 states have return successors, (48), 17 states have call predecessors, (48), 20 states have call successors, (48) [2024-09-21 12:31:00,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:00,377 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 64 transitions. [2024-09-21 12:31:00,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2024-09-21 12:31:00,378 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:31:00,378 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:31:00,399 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-21 12:31:00,582 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 [2024-09-21 12:31:00,583 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:31:00,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:00,583 INFO L85 PathProgramCache]: Analyzing trace with hash -763891587, now seen corresponding path program 16 times [2024-09-21 12:31:00,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:31:00,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386756769] [2024-09-21 12:31:00,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:31:00,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:31:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:00,704 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:31:00,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:00,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:31:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:00,822 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:00,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:00,960 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:00,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,043 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,259 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,324 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,379 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,426 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,467 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,507 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,541 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:01,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:01,687 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-21 12:31:01,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:31:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386756769] [2024-09-21 12:31:01,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386756769] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:31:01,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370509530] [2024-09-21 12:31:01,687 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-21 12:31:01,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:31:01,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:31:01,689 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) [2024-09-21 12:31:01,690 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-21 12:31:02,548 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-21 12:31:02,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:31:02,550 INFO L262 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-21 12:31:02,551 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:31:02,650 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-21 12:31:02,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:31:19,631 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-21 12:31:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370509530] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:31:19,631 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:31:19,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-09-21 12:31:19,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361483784] [2024-09-21 12:31:19,632 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:31:19,632 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-21 12:31:19,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:31:19,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-21 12:31:19,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-09-21 12:31:19,634 INFO L87 Difference]: Start difference. First operand 63 states and 64 transitions. Second operand has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-21 12:31:19,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:31:19,827 INFO L93 Difference]: Finished difference Result 70 states and 71 transitions. [2024-09-21 12:31:19,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-21 12:31:19,828 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) Word has length 109 [2024-09-21 12:31:19,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:31:19,829 INFO L225 Difference]: With dead ends: 70 [2024-09-21 12:31:19,829 INFO L226 Difference]: Without dead ends: 66 [2024-09-21 12:31:19,831 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 216 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-09-21 12:31:19,831 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 118 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 158 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:31:19,832 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 190 Invalid, 158 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:31:19,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2024-09-21 12:31:19,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2024-09-21 12:31:19,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 43 states have internal predecessors, (43), 4 states have call successors, (4), 3 states have call predecessors, (4), 19 states have return successors, (20), 19 states have call predecessors, (20), 3 states have call successors, (20) [2024-09-21 12:31:19,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2024-09-21 12:31:19,838 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 109 [2024-09-21 12:31:19,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:31:19,838 INFO L474 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2024-09-21 12:31:19,838 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.025) internal successors, (81), 42 states have internal predecessors, (81), 21 states have call successors, (22), 1 states have call predecessors, (22), 19 states have return successors, (51), 18 states have call predecessors, (51), 21 states have call successors, (51) [2024-09-21 12:31:19,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:19,838 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2024-09-21 12:31:19,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2024-09-21 12:31:19,839 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:31:19,839 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:31:19,855 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-09-21 12:31:20,039 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 [2024-09-21 12:31:20,040 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:31:20,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:20,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1440720433, now seen corresponding path program 17 times [2024-09-21 12:31:20,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:31:20,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121371946] [2024-09-21 12:31:20,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:31:20,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:31:20,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:31:20,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:31:20,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,297 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,435 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,610 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,821 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:20,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:20,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,040 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,109 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,130 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,148 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:21,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:21,197 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-21 12:31:21,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:31:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121371946] [2024-09-21 12:31:21,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121371946] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:31:21,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815611446] [2024-09-21 12:31:21,197 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-21 12:31:21,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:31:21,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:31:21,198 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:31:21,199 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-21 12:31:22,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-21 12:31:22,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:31:22,183 INFO L262 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-21 12:31:22,185 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:31:22,284 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-21 12:31:22,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:31:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-21 12:31:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815611446] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:31:42,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:31:42,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-09-21 12:31:42,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854774318] [2024-09-21 12:31:42,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:31:42,668 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-21 12:31:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:31:42,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-21 12:31:42,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-09-21 12:31:42,669 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-21 12:31:42,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:31:42,904 INFO L93 Difference]: Finished difference Result 73 states and 74 transitions. [2024-09-21 12:31:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-21 12:31:42,905 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) Word has length 115 [2024-09-21 12:31:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:31:42,906 INFO L225 Difference]: With dead ends: 73 [2024-09-21 12:31:42,906 INFO L226 Difference]: Without dead ends: 69 [2024-09-21 12:31:42,907 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 228 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-09-21 12:31:42,908 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 218 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 238 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 212 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:31:42,908 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [238 Valid, 192 Invalid, 212 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:31:42,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2024-09-21 12:31:42,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2024-09-21 12:31:42,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 45 states have internal predecessors, (45), 4 states have call successors, (4), 3 states have call predecessors, (4), 20 states have return successors, (21), 20 states have call predecessors, (21), 3 states have call successors, (21) [2024-09-21 12:31:42,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 70 transitions. [2024-09-21 12:31:42,914 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 70 transitions. Word has length 115 [2024-09-21 12:31:42,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:31:42,914 INFO L474 AbstractCegarLoop]: Abstraction has 69 states and 70 transitions. [2024-09-21 12:31:42,915 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 44 states have internal predecessors, (85), 22 states have call successors, (23), 1 states have call predecessors, (23), 20 states have return successors, (54), 19 states have call predecessors, (54), 22 states have call successors, (54) [2024-09-21 12:31:42,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:42,915 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 70 transitions. [2024-09-21 12:31:42,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2024-09-21 12:31:42,916 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:31:42,916 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:31:42,934 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-21 12:31:43,116 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-21 12:31:43,117 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:31:43,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:31:43,117 INFO L85 PathProgramCache]: Analyzing trace with hash -1110583619, now seen corresponding path program 18 times [2024-09-21 12:31:43,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:31:43,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703716565] [2024-09-21 12:31:43,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:31:43,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:31:43,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:31:43,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,278 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:31:43,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,411 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,512 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,595 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,758 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,875 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,943 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:43,989 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:43,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,054 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,152 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,176 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,200 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,266 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:31:44,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:31:44,295 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-09-21 12:31:44,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:31:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703716565] [2024-09-21 12:31:44,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703716565] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:31:44,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203201929] [2024-09-21 12:31:44,295 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-21 12:31:44,295 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:31:44,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:31:44,297 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:31:44,298 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-21 12:31:45,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-21 12:31:45,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:31:45,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-21 12:31:45,504 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:31:45,608 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-21 12:31:45,609 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:32:10,062 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-21 12:32:10,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203201929] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:32:10,062 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:32:10,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-09-21 12:32:10,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437401524] [2024-09-21 12:32:10,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:32:10,063 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-21 12:32:10,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:32:10,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-21 12:32:10,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-09-21 12:32:10,064 INFO L87 Difference]: Start difference. First operand 69 states and 70 transitions. Second operand has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-21 12:32:10,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:32:10,276 INFO L93 Difference]: Finished difference Result 76 states and 77 transitions. [2024-09-21 12:32:10,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-21 12:32:10,277 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) Word has length 121 [2024-09-21 12:32:10,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:32:10,278 INFO L225 Difference]: With dead ends: 76 [2024-09-21 12:32:10,278 INFO L226 Difference]: Without dead ends: 72 [2024-09-21 12:32:10,279 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 321 GetRequests, 240 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-09-21 12:32:10,279 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 131 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 174 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:32:10,279 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 210 Invalid, 174 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:32:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2024-09-21 12:32:10,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2024-09-21 12:32:10,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 47 states have internal predecessors, (47), 4 states have call successors, (4), 3 states have call predecessors, (4), 21 states have return successors, (22), 21 states have call predecessors, (22), 3 states have call successors, (22) [2024-09-21 12:32:10,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2024-09-21 12:32:10,285 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 121 [2024-09-21 12:32:10,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:32:10,285 INFO L474 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2024-09-21 12:32:10,286 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.022727272727273) internal successors, (89), 46 states have internal predecessors, (89), 23 states have call successors, (24), 1 states have call predecessors, (24), 21 states have return successors, (57), 20 states have call predecessors, (57), 23 states have call successors, (57) [2024-09-21 12:32:10,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:10,286 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2024-09-21 12:32:10,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2024-09-21 12:32:10,286 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:32:10,286 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:32:10,311 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-21 12:32:10,487 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:10,487 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:32:10,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:10,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1808618865, now seen corresponding path program 19 times [2024-09-21 12:32:10,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:32:10,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620962420] [2024-09-21 12:32:10,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:32:10,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:32:10,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:10,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:32:10,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:10,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:32:10,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:10,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:10,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:10,834 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:10,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:10,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:10,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,182 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,242 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,294 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,359 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,511 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,584 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,611 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,657 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,679 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,698 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:11,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:11,728 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-09-21 12:32:11,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:32:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620962420] [2024-09-21 12:32:11,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620962420] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:32:11,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1707561748] [2024-09-21 12:32:11,729 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-21 12:32:11,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:11,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:32:11,731 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:32:11,732 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-21 12:32:13,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:13,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-21 12:32:13,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:32:13,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-21 12:32:13,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:32:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-21 12:32:42,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1707561748] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:32:42,340 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:32:42,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 47 [2024-09-21 12:32:42,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690045212] [2024-09-21 12:32:42,341 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:32:42,341 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-21 12:32:42,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:32:42,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-21 12:32:42,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2024-09-21 12:32:42,343 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 47 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) [2024-09-21 12:32:42,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:32:42,580 INFO L93 Difference]: Finished difference Result 79 states and 80 transitions. [2024-09-21 12:32:42,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-21 12:32:42,580 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) Word has length 127 [2024-09-21 12:32:42,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:32:42,581 INFO L225 Difference]: With dead ends: 79 [2024-09-21 12:32:42,581 INFO L226 Difference]: Without dead ends: 75 [2024-09-21 12:32:42,582 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 337 GetRequests, 252 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1430, Invalid=2860, Unknown=0, NotChecked=0, Total=4290 [2024-09-21 12:32:42,583 INFO L434 NwaCegarLoop]: 13 mSDtfsCounter, 245 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 109 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 267 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 109 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:32:42,583 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [267 Valid, 219 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [109 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:32:42,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2024-09-21 12:32:42,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2024-09-21 12:32:42,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 49 states have internal predecessors, (49), 4 states have call successors, (4), 3 states have call predecessors, (4), 22 states have return successors, (23), 22 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-21 12:32:42,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 76 transitions. [2024-09-21 12:32:42,591 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 76 transitions. Word has length 127 [2024-09-21 12:32:42,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:32:42,591 INFO L474 AbstractCegarLoop]: Abstraction has 75 states and 76 transitions. [2024-09-21 12:32:42,592 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.0) internal successors, (92), 47 states have internal predecessors, (92), 23 states have call successors, (24), 1 states have call predecessors, (24), 22 states have return successors, (59), 21 states have call predecessors, (59), 23 states have call successors, (59) [2024-09-21 12:32:42,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:42,592 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 76 transitions. [2024-09-21 12:32:42,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2024-09-21 12:32:42,593 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:32:42,593 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:32:42,612 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2024-09-21 12:32:42,793 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:42,793 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:32:42,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:42,794 INFO L85 PathProgramCache]: Analyzing trace with hash 145386749, now seen corresponding path program 20 times [2024-09-21 12:32:42,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:32:42,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199871881] [2024-09-21 12:32:42,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:32:42,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:32:42,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:42,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:32:42,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,000 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:32:43,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,281 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:43,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,447 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:43,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:43,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,753 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:43,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:43,885 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:43,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,015 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,335 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,476 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,563 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,646 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,782 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,916 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:44,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:44,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:45,031 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:45,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:45,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:45,137 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:45,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:45,165 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-21 12:32:45,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:32:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199871881] [2024-09-21 12:32:45,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199871881] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:32:45,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074475266] [2024-09-21 12:32:45,166 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-21 12:32:45,166 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:45,166 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:32:45,167 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:32:45,168 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-21 12:32:46,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-21 12:32:46,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:32:46,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-21 12:32:46,949 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:32:47,017 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-21 12:32:47,017 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-21 12:32:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-21 12:32:48,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074475266] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-21 12:32:48,367 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-21 12:32:48,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 45 [2024-09-21 12:32:48,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367485731] [2024-09-21 12:32:48,367 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-21 12:32:48,368 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2024-09-21 12:32:48,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:32:48,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2024-09-21 12:32:48,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2024-09-21 12:32:48,369 INFO L87 Difference]: Start difference. First operand 75 states and 76 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2024-09-21 12:32:48,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:32:48,860 INFO L93 Difference]: Finished difference Result 82 states and 83 transitions. [2024-09-21 12:32:48,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2024-09-21 12:32:48,860 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) Word has length 133 [2024-09-21 12:32:48,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:32:48,861 INFO L225 Difference]: With dead ends: 82 [2024-09-21 12:32:48,862 INFO L226 Difference]: Without dead ends: 78 [2024-09-21 12:32:48,862 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 354 GetRequests, 311 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2024-09-21 12:32:48,863 INFO L434 NwaCegarLoop]: 54 mSDtfsCounter, 0 mSDsluCounter, 1859 mSDsCounter, 0 mSdLazyCounter, 1369 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 1913 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-09-21 12:32:48,863 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 1913 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1369 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-09-21 12:32:48,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2024-09-21 12:32:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2024-09-21 12:32:48,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 50 states have (on average 1.02) internal successors, (51), 51 states have internal predecessors, (51), 4 states have call successors, (4), 3 states have call predecessors, (4), 23 states have return successors, (24), 23 states have call predecessors, (24), 3 states have call successors, (24) [2024-09-21 12:32:48,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2024-09-21 12:32:48,870 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 133 [2024-09-21 12:32:48,871 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:32:48,871 INFO L474 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2024-09-21 12:32:48,871 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 24 states have internal predecessors, (49), 1 states have call successors, (4), 1 states have call predecessors, (4), 22 states have return successors, (22), 22 states have call predecessors, (22), 1 states have call successors, (22) [2024-09-21 12:32:48,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:48,871 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2024-09-21 12:32:48,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2024-09-21 12:32:48,872 INFO L208 NwaCegarLoop]: Found error trace [2024-09-21 12:32:48,872 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-21 12:32:48,906 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-21 12:32:49,073 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-21 12:32:49,073 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-21 12:32:49,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:49,074 INFO L85 PathProgramCache]: Analyzing trace with hash -1314272433, now seen corresponding path program 21 times [2024-09-21 12:32:49,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-21 12:32:49,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035143078] [2024-09-21 12:32:49,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-21 12:32:49,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-21 12:32:49,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,288 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2024-09-21 12:32:49,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,290 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 5 [2024-09-21 12:32:49,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:49,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,690 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:49,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:49,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:49,975 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:49,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,099 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,228 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,334 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,432 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,553 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,699 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,865 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,900 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,963 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:50,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:50,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:51,012 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:51,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:51,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:51,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:51,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-21 12:32:51,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-21 12:32:51,086 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 63 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-09-21 12:32:51,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-21 12:32:51,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035143078] [2024-09-21 12:32:51,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035143078] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-21 12:32:51,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037591670] [2024-09-21 12:32:51,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-21 12:32:51,087 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:51,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-21 12:32:51,088 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-21 12:32:51,089 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-21 12:32:52,874 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-21 12:32:52,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-21 12:32:52,877 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-21 12:32:52,879 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-21 12:32:53,023 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-21 12:32:53,023 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-21 12:32:53,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037591670] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-21 12:32:53,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-21 12:32:53,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [27] total 29 [2024-09-21 12:32:53,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045218010] [2024-09-21 12:32:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-21 12:32:53,024 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-21 12:32:53,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-21 12:32:53,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-21 12:32:53,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2024-09-21 12:32:53,025 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-21 12:32:53,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-21 12:32:53,325 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2024-09-21 12:32:53,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-21 12:32:53,326 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) Word has length 139 [2024-09-21 12:32:53,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-21 12:32:53,326 INFO L225 Difference]: With dead ends: 78 [2024-09-21 12:32:53,326 INFO L226 Difference]: Without dead ends: 0 [2024-09-21 12:32:53,328 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=815, Invalid=1635, Unknown=0, NotChecked=0, Total=2450 [2024-09-21 12:32:53,328 INFO L434 NwaCegarLoop]: 50 mSDtfsCounter, 2 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 127 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 127 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-21 12:32:53,328 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 227 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 127 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-21 12:32:53,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-21 12:32:53,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-21 12:32:53,330 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) [2024-09-21 12:32:53,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-21 12:32:53,330 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 139 [2024-09-21 12:32:53,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-21 12:32:53,330 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-21 12:32:53,330 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.04) internal successors, (51), 26 states have internal predecessors, (51), 3 states have call successors, (4), 1 states have call predecessors, (4), 23 states have return successors, (23), 23 states have call predecessors, (23), 3 states have call successors, (23) [2024-09-21 12:32:53,331 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-21 12:32:53,331 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-21 12:32:53,331 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-21 12:32:53,335 INFO L785 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-21 12:32:53,359 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2024-09-21 12:32:53,536 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-21 12:32:53,540 INFO L408 BasicCegarLoop]: Path program histogram: [21, 1] [2024-09-21 12:32:53,542 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-21 12:32:55,091 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-21 12:32:55,149 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.09 12:32:55 BoogieIcfgContainer [2024-09-21 12:32:55,150 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-21 12:32:55,150 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-21 12:32:55,150 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-21 12:32:55,150 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-21 12:32:55,151 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.09 12:29:39" (3/4) ... [2024-09-21 12:32:55,153 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-21 12:32:55,205 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-21 12:32:55,205 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-21 12:32:55,205 INFO L158 Benchmark]: Toolchain (without parser) took 196073.44ms. Allocated memory was 165.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 97.2MB in the beginning and 955.6MB in the end (delta: -858.4MB). Peak memory consumption was 227.7MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,206 INFO L158 Benchmark]: CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 73.9MB in the beginning and 73.8MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:32:55,206 INFO L158 Benchmark]: CACSL2BoogieTranslator took 245.64ms. Allocated memory is still 165.7MB. Free memory was 97.0MB in the beginning and 86.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,206 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.71ms. Allocated memory is still 165.7MB. Free memory was 86.1MB in the beginning and 85.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-21 12:32:55,207 INFO L158 Benchmark]: Boogie Preprocessor took 32.61ms. Allocated memory is still 165.7MB. Free memory was 85.1MB in the beginning and 83.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,207 INFO L158 Benchmark]: RCFGBuilder took 268.91ms. Allocated memory is still 165.7MB. Free memory was 83.5MB in the beginning and 131.0MB in the end (delta: -47.5MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,207 INFO L158 Benchmark]: TraceAbstraction took 195442.15ms. Allocated memory was 165.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 130.3MB in the beginning and 957.7MB in the end (delta: -827.4MB). Peak memory consumption was 770.5MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,208 INFO L158 Benchmark]: Witness Printer took 54.73ms. Allocated memory is still 1.2GB. Free memory was 957.7MB in the beginning and 955.6MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-21 12:32:55,209 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.19ms. Allocated memory is still 113.2MB. Free memory was 73.9MB in the beginning and 73.8MB in the end (delta: 118.9kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 245.64ms. Allocated memory is still 165.7MB. Free memory was 97.0MB in the beginning and 86.1MB in the end (delta: 10.9MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.71ms. Allocated memory is still 165.7MB. Free memory was 86.1MB in the beginning and 85.1MB in the end (delta: 1.0MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 32.61ms. Allocated memory is still 165.7MB. Free memory was 85.1MB in the beginning and 83.7MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 268.91ms. Allocated memory is still 165.7MB. Free memory was 83.5MB in the beginning and 131.0MB in the end (delta: -47.5MB). Peak memory consumption was 10.9MB. Max. memory is 16.1GB. * TraceAbstraction took 195442.15ms. Allocated memory was 165.7MB in the beginning and 1.2GB in the end (delta: 1.1GB). Free memory was 130.3MB in the beginning and 957.7MB in the end (delta: -827.4MB). Peak memory consumption was 770.5MB. Max. memory is 16.1GB. * Witness Printer took 54.73ms. Allocated memory is still 1.2GB. Free memory was 957.7MB in the beginning and 955.6MB in the end (delta: 2.1MB). 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: 193.8s, OverallIterations: 22, TraceHistogramMax: 22, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 3.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1926 SdHoareTripleChecker+Valid, 1.8s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1675 mSDsluCounter, 4880 SdHoareTripleChecker+Invalid, 1.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 4512 mSDsCounter, 657 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3193 IncrementalHoareTripleChecker+Invalid, 3850 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 657 mSolverCounterUnsat, 368 mSDtfsCounter, 3193 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4259 GetRequests, 3234 SyntacticMatches, 210 SemanticMatches, 815 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13950 ImplicationChecksByTransitivity, 8.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=78occurred in iteration=21, InterpolantAutomatonStates: 361, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.7s SatisfiabilityAnalysisTime, 173.6s InterpolantComputationTime, 3331 NumberOfCodeBlocks, 3331 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 4788 ConstructedInterpolants, 0 QuantifiedInterpolants, 13448 SizeOfPredicates, 211 NumberOfNonLiveVariables, 4263 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 13195/29148 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) && (x == 3)) || ((19 == \result) && (19 == x))) || ((11 == \result) && (x == 11))) || ((x == 6) && (6 == \result))) || ((9 == \result) && (x == 9))) || ((x == 17) && (17 == \result))) || ((x == 18) && (18 == \result))) || ((2 == \result) && (x == 2))) || (20 < x)) || ((10 == \result) && (x == 10))) || ((5 == \result) && (5 == x))) || ((20 == \result) && (x == 20))) || ((8 == \result) && (x == 8))) || ((7 == \result) && (7 == x))) || ((12 == \result) && (x == 12))) || ((\result == 1) && (x == 1))) || ((14 == \result) && (x == 14))) || ((x == 4) && (4 == \result))) || ((x == 15) && (15 == \result))) || ((13 == \result) && (x == 13))) || ((x == 16) && (16 == \result))) || ((\result == 0) && (x == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-21 12:32:55,287 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