./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c --full-output --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version a9b967e5 Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/certificate-witnesses-artifact/automizer/data/config -Xmx15G -Xms4m -jar /storage/repos/certificate-witnesses-artifact/automizer/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/certificate-witnesses-artifact/automizer/data -tc /storage/repos/certificate-witnesses-artifact/automizer/config/AutomizerReach.xml -i ../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 --traceabstraction.positions.where.we.compute.the.hoare.annotation All --witnessprinter.yaml.format.version 2.1 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-a9b967e-m [2024-09-11 20:28:55,826 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:28:55,906 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:28:55,910 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:28:55,913 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:28:55,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:28:55,944 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:28:55,945 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:28:55,945 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:28:55,947 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:28:55,947 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:28:55,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:28:55,948 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:28:55,950 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:28:55,950 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:28:55,950 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:28:55,951 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:28:55,951 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:28:55,951 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:28:55,951 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:28:55,952 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:28:55,952 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:28:55,953 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:28:55,953 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:28:55,953 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:28:55,954 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:28:55,954 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:28:55,954 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:28:55,955 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:28:55,955 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:28:55,955 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:28:55,955 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:28:55,956 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:28:55,956 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:28:55,956 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:28:55,956 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:28:55,957 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:28:55,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:28:55,957 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:28:55,957 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:28:55,957 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:28:55,958 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:28:55,959 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 715908359373978289cc76ce2f00faf49f4d4a3c6ddae64771646fc969bea981 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:28:56,214 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:28:56,238 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:28:56,242 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:28:56,243 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:28:56,243 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:28:56,244 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-11 20:28:57,566 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:28:57,730 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:28:57,730 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c [2024-09-11 20:28:57,740 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/d1f112dfd/2e4430d5a6df40d5aea5f9f1367bb6c0/FLAG1c2bf2d78 [2024-09-11 20:28:57,752 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/d1f112dfd/2e4430d5a6df40d5aea5f9f1367bb6c0 [2024-09-11 20:28:57,754 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:28:57,756 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:28:57,758 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:28:57,758 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:28:57,763 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:28:57,763 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:28:57" (1/1) ... [2024-09-11 20:28:57,764 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@19ec4cb9 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:57, skipping insertion in model container [2024-09-11 20:28:57,764 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:28:57" (1/1) ... [2024-09-11 20:28:57,782 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:28:57,976 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-11 20:28:57,980 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:28:57,990 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:28:58,003 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i15_o15-1.c[454,467] [2024-09-11 20:28:58,004 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:28:58,018 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:28:58,019 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58 WrapperNode [2024-09-11 20:28:58,019 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:28:58,020 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:28:58,020 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:28:58,020 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:28:58,026 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,031 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,045 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-11 20:28:58,046 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:28:58,046 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:28:58,046 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:28:58,046 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:28:58,054 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,054 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,055 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,062 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]. [2024-09-11 20:28:58,062 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,062 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,064 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,065 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,065 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,066 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,067 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:28:58,068 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:28:58,068 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:28:58,068 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:28:58,069 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (1/1) ... [2024-09-11 20:28:58,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:28:58,083 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:28:58,098 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) [2024-09-11 20:28:58,101 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 [2024-09-11 20:28:58,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:28:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:28:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:28:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:28:58,149 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-11 20:28:58,149 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-11 20:28:58,197 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:28:58,198 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:28:58,265 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-11 20:28:58,265 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:28:58,284 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:28:58,284 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-11 20:28:58,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:28:58 BoogieIcfgContainer [2024-09-11 20:28:58,285 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:28:58,286 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:28:58,286 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:28:58,289 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:28:58,289 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:28:57" (1/3) ... [2024-09-11 20:28:58,290 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d582b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:28:58, skipping insertion in model container [2024-09-11 20:28:58,290 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:28:58" (2/3) ... [2024-09-11 20:28:58,291 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d582b7e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:28:58, skipping insertion in model container [2024-09-11 20:28:58,291 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:28:58" (3/3) ... [2024-09-11 20:28:58,292 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i15_o15-1.c [2024-09-11 20:28:58,304 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:28:58,305 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:28:58,352 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:28:58,357 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;@22c6b7b4, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:28:58,358 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:28:58,361 INFO L276 IsEmpty]: Start isEmpty. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2024-09-11 20:28:58,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 20:28:58,366 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:28:58,367 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:28:58,367 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:28:58,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:28:58,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2024-09-11 20:28:58,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:28:58,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788883709] [2024-09-11 20:28:58,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:28:58,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:28:58,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:58,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:28:58,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:58,616 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-11 20:28:58,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:28:58,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788883709] [2024-09-11 20:28:58,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788883709] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:28:58,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:28:58,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:28:58,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144668228] [2024-09-11 20:28:58,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:28:58,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:28:58,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:28:58,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:28:58,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:28:58,648 INFO L87 Difference]: Start difference. First operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 10 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:28:58,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:28:58,709 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-09-11 20:28:58,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:28:58,714 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 9 [2024-09-11 20:28:58,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:28:58,721 INFO L225 Difference]: With dead ends: 22 [2024-09-11 20:28:58,721 INFO L226 Difference]: Without dead ends: 14 [2024-09-11 20:28:58,723 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:28:58,726 INFO L434 NwaCegarLoop]: 10 mSDtfsCounter, 7 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:28:58,726 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 26 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:28:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-11 20:28:58,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-11 20:28:58,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 10 states have internal predecessors, (10), 2 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-09-11 20:28:58,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-11 20:28:58,767 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2024-09-11 20:28:58,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:28:58,768 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-11 20:28:58,768 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 4 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-09-11 20:28:58,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:28:58,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-11 20:28:58,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 20:28:58,772 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:28:58,772 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:28:58,772 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:28:58,772 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:28:58,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:28:58,774 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2024-09-11 20:28:58,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:28:58,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464771598] [2024-09-11 20:28:58,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:28:58,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:28:58,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:58,883 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:28:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:58,971 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:28:58,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,039 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:28:59,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:28:59,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464771598] [2024-09-11 20:28:59,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464771598] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:28:59,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328512521] [2024-09-11 20:28:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:28:59,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:28:59,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:28:59,046 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) [2024-09-11 20:28:59,048 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-11 20:28:59,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,099 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 20:28:59,107 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:28:59,207 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-09-11 20:28:59,207 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:28:59,444 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-09-11 20:28:59,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328512521] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:28:59,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:28:59,446 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 13 [2024-09-11 20:28:59,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881615601] [2024-09-11 20:28:59,447 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:28:59,447 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-11 20:28:59,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:28:59,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-11 20:28:59,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:28:59,449 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:28:59,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:28:59,527 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-09-11 20:28:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 20:28:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) Word has length 15 [2024-09-11 20:28:59,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:28:59,531 INFO L225 Difference]: With dead ends: 21 [2024-09-11 20:28:59,531 INFO L226 Difference]: Without dead ends: 17 [2024-09-11 20:28:59,532 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:28:59,533 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 7 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:28:59,533 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 37 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:28:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-11 20:28:59,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-11 20:28:59,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 12 states have internal predecessors, (12), 2 states have call successors, (2), 1 states have call predecessors, (2), 3 states have return successors, (4), 3 states have call predecessors, (4), 2 states have call successors, (4) [2024-09-11 20:28:59,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-11 20:28:59,542 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2024-09-11 20:28:59,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:28:59,542 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-11 20:28:59,542 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 2.1) internal successors, (21), 12 states have internal predecessors, (21), 6 states have call successors, (6), 1 states have call predecessors, (6), 3 states have return successors, (6), 2 states have call predecessors, (6), 6 states have call successors, (6) [2024-09-11 20:28:59,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:28:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-11 20:28:59,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 20:28:59,545 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:28:59,545 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:28:59,562 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-09-11 20:28:59,749 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 [2024-09-11 20:28:59,750 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:28:59,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:28:59,750 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2024-09-11 20:28:59,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:28:59,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941534073] [2024-09-11 20:28:59,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:28:59,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:28:59,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,847 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:28:59,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:28:59,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:28:59,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:28:59,989 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-09-11 20:28:59,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:28:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941534073] [2024-09-11 20:28:59,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941534073] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:28:59,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907388923] [2024-09-11 20:28:59,989 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:28:59,990 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:28:59,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:28:59,993 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) [2024-09-11 20:28:59,994 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-11 20:29:00,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:00,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:00,041 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 20:29:00,043 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:00,115 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-09-11 20:29:00,115 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:00,458 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-09-11 20:29:00,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907388923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:00,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:00,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 15 [2024-09-11 20:29:00,459 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536120574] [2024-09-11 20:29:00,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:00,460 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-11 20:29:00,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:00,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-11 20:29:00,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2024-09-11 20:29:00,464 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-11 20:29:00,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:00,519 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-09-11 20:29:00,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:29:00,519 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) Word has length 21 [2024-09-11 20:29:00,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:00,520 INFO L225 Difference]: With dead ends: 24 [2024-09-11 20:29:00,520 INFO L226 Difference]: Without dead ends: 20 [2024-09-11 20:29:00,521 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2024-09-11 20:29:00,522 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 18 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:00,522 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 34 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:00,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-11 20:29:00,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-11 20:29:00,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 14 states have internal predecessors, (14), 2 states have call successors, (2), 1 states have call predecessors, (2), 4 states have return successors, (5), 4 states have call predecessors, (5), 2 states have call successors, (5) [2024-09-11 20:29:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-09-11 20:29:00,528 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2024-09-11 20:29:00,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:00,528 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-09-11 20:29:00,528 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 14 states have internal predecessors, (25), 7 states have call successors, (7), 1 states have call predecessors, (7), 4 states have return successors, (9), 3 states have call predecessors, (9), 7 states have call successors, (9) [2024-09-11 20:29:00,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-09-11 20:29:00,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 20:29:00,529 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:00,529 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:00,546 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:00,730 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 [2024-09-11 20:29:00,730 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:00,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:00,731 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2024-09-11 20:29:00,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:00,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784277853] [2024-09-11 20:29:00,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:00,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:00,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:00,801 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:00,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:00,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:00,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:00,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:00,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:00,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:00,993 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-09-11 20:29:00,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:00,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784277853] [2024-09-11 20:29:00,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784277853] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:00,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967684766] [2024-09-11 20:29:00,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:29:00,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:00,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:00,999 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) [2024-09-11 20:29:01,001 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-11 20:29:01,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:29:01,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:01,046 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 20:29:01,048 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:01,117 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:29:01,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:01,611 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-09-11 20:29:01,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967684766] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:01,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:01,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 17 [2024-09-11 20:29:01,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79704396] [2024-09-11 20:29:01,612 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:01,613 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-09-11 20:29:01,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:01,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-09-11 20:29:01,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2024-09-11 20:29:01,615 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:29:01,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:01,691 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-09-11 20:29:01,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:29:01,692 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) Word has length 27 [2024-09-11 20:29:01,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:01,693 INFO L225 Difference]: With dead ends: 27 [2024-09-11 20:29:01,693 INFO L226 Difference]: Without dead ends: 23 [2024-09-11 20:29:01,694 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 47 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:29:01,694 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 59 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:01,695 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 59 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:01,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-11 20:29:01,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-11 20:29:01,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 16 states have internal predecessors, (16), 2 states have call successors, (2), 1 states have call predecessors, (2), 5 states have return successors, (6), 5 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-11 20:29:01,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-09-11 20:29:01,704 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2024-09-11 20:29:01,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:01,704 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-09-11 20:29:01,704 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 16 states have internal predecessors, (29), 8 states have call successors, (8), 1 states have call predecessors, (8), 5 states have return successors, (12), 4 states have call predecessors, (12), 8 states have call successors, (12) [2024-09-11 20:29:01,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:01,705 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-09-11 20:29:01,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 20:29:01,707 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:01,707 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:01,726 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:01,913 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 [2024-09-11 20:29:01,914 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:01,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2024-09-11 20:29:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:01,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123662460] [2024-09-11 20:29:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:01,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:01,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:01,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:02,053 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:02,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:02,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:02,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:02,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:02,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:02,172 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:02,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:02,204 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-09-11 20:29:02,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:02,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123662460] [2024-09-11 20:29:02,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123662460] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:02,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627103802] [2024-09-11 20:29:02,205 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:29:02,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:02,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:02,206 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) [2024-09-11 20:29:02,208 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-11 20:29:02,260 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:29:02,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:02,261 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 20:29:02,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:02,335 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2024-09-11 20:29:02,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:03,078 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-09-11 20:29:03,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627103802] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:03,078 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:03,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 19 [2024-09-11 20:29:03,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284834800] [2024-09-11 20:29:03,078 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:03,079 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-11 20:29:03,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:03,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-11 20:29:03,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=251, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:29:03,082 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-11 20:29:03,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:03,167 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-09-11 20:29:03,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:29:03,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) Word has length 33 [2024-09-11 20:29:03,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:03,170 INFO L225 Difference]: With dead ends: 30 [2024-09-11 20:29:03,170 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 20:29:03,171 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 59 SyntacticMatches, 5 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:29:03,172 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:03,172 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 48 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:03,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 20:29:03,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-11 20:29:03,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 18 states have internal predecessors, (18), 2 states have call successors, (2), 1 states have call predecessors, (2), 6 states have return successors, (7), 6 states have call predecessors, (7), 2 states have call successors, (7) [2024-09-11 20:29:03,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-09-11 20:29:03,183 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2024-09-11 20:29:03,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:03,183 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-09-11 20:29:03,183 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.0625) internal successors, (33), 18 states have internal predecessors, (33), 9 states have call successors, (9), 1 states have call predecessors, (9), 6 states have return successors, (15), 5 states have call predecessors, (15), 9 states have call successors, (15) [2024-09-11 20:29:03,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:03,184 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-09-11 20:29:03,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 20:29:03,185 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:03,185 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:03,201 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-09-11 20:29:03,385 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 [2024-09-11 20:29:03,385 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:03,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2024-09-11 20:29:03,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:03,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625745844] [2024-09-11 20:29:03,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:03,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:03,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,454 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:03,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,499 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:03,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:03,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,591 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:03,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,625 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:03,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,647 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:03,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,680 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2024-09-11 20:29:03,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:03,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625745844] [2024-09-11 20:29:03,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625745844] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:03,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685884232] [2024-09-11 20:29:03,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:29:03,681 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:03,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:03,683 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) [2024-09-11 20:29:03,685 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-11 20:29:03,740 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-11 20:29:03,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:03,741 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 20:29:03,743 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:03,812 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 40 trivial. 0 not checked. [2024-09-11 20:29:03,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:04,803 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-09-11 20:29:04,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685884232] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:04,803 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:04,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 21 [2024-09-11 20:29:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203995051] [2024-09-11 20:29:04,806 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:04,806 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:29:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:04,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:29:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2024-09-11 20:29:04,809 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-11 20:29:04,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:04,919 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-09-11 20:29:04,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:29:04,921 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) Word has length 39 [2024-09-11 20:29:04,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:04,923 INFO L225 Difference]: With dead ends: 33 [2024-09-11 20:29:04,923 INFO L226 Difference]: Without dead ends: 29 [2024-09-11 20:29:04,924 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 71 SyntacticMatches, 6 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:29:04,924 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 76 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 60 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 60 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:04,925 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 55 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 60 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:04,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-11 20:29:04,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-11 20:29:04,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 20 states have internal predecessors, (20), 2 states have call successors, (2), 1 states have call predecessors, (2), 7 states have return successors, (8), 7 states have call predecessors, (8), 2 states have call successors, (8) [2024-09-11 20:29:04,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-09-11 20:29:04,931 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2024-09-11 20:29:04,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:04,931 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-09-11 20:29:04,932 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 20 states have internal predecessors, (37), 10 states have call successors, (10), 1 states have call predecessors, (10), 7 states have return successors, (18), 6 states have call predecessors, (18), 10 states have call successors, (18) [2024-09-11 20:29:04,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:04,932 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-09-11 20:29:04,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 20:29:04,933 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:04,933 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:04,948 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-09-11 20:29:05,137 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 [2024-09-11 20:29:05,138 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:05,138 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:05,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2024-09-11 20:29:05,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:05,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906645167] [2024-09-11 20:29:05,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:05,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:05,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,261 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,346 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,378 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,424 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,451 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2024-09-11 20:29:05,452 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906645167] [2024-09-11 20:29:05,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906645167] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:05,452 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [375011607] [2024-09-11 20:29:05,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:29:05,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:05,453 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:05,454 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) [2024-09-11 20:29:05,457 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-11 20:29:05,519 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-11 20:29:05,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:05,520 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-11 20:29:05,522 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:05,604 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2024-09-11 20:29:05,604 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:06,925 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2024-09-11 20:29:06,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [375011607] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:06,926 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:06,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 23 [2024-09-11 20:29:06,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880544046] [2024-09-11 20:29:06,926 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:06,926 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-11 20:29:06,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-11 20:29:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=373, Unknown=0, NotChecked=0, Total=506 [2024-09-11 20:29:06,928 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-11 20:29:07,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:07,028 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-11 20:29:07,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:29:07,029 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) Word has length 45 [2024-09-11 20:29:07,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:07,030 INFO L225 Difference]: With dead ends: 36 [2024-09-11 20:29:07,030 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 20:29:07,030 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 83 SyntacticMatches, 7 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=241, Invalid=571, Unknown=0, NotChecked=0, Total=812 [2024-09-11 20:29:07,031 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:07,031 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [60 Valid, 64 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:07,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 20:29:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-11 20:29:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 22 states have internal predecessors, (22), 2 states have call successors, (2), 1 states have call predecessors, (2), 8 states have return successors, (9), 8 states have call predecessors, (9), 2 states have call successors, (9) [2024-09-11 20:29:07,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-09-11 20:29:07,037 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2024-09-11 20:29:07,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:07,037 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-09-11 20:29:07,037 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 20 states have (on average 2.05) internal successors, (41), 22 states have internal predecessors, (41), 11 states have call successors, (11), 1 states have call predecessors, (11), 8 states have return successors, (21), 7 states have call predecessors, (21), 11 states have call successors, (21) [2024-09-11 20:29:07,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:07,038 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-09-11 20:29:07,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-11 20:29:07,039 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:07,039 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:07,055 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:07,239 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 [2024-09-11 20:29:07,240 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:07,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2024-09-11 20:29:07,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:07,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946783535] [2024-09-11 20:29:07,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:07,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:07,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,299 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:07,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,382 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,427 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,496 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,523 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,545 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,566 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,595 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 84 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2024-09-11 20:29:07,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946783535] [2024-09-11 20:29:07,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946783535] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:07,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908307402] [2024-09-11 20:29:07,596 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:29:07,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:07,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:07,598 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) [2024-09-11 20:29:07,600 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-11 20:29:07,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,684 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 20:29:07,686 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:07,763 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 77 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2024-09-11 20:29:07,764 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:09,497 INFO L134 CoverageAnalysis]: Checked inductivity of 154 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 28 trivial. 0 not checked. [2024-09-11 20:29:09,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908307402] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:09,497 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:09,497 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 25 [2024-09-11 20:29:09,497 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685615831] [2024-09-11 20:29:09,498 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:09,498 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-09-11 20:29:09,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:09,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-09-11 20:29:09,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=443, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:29:09,500 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-11 20:29:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:09,617 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-09-11 20:29:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:29:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) Word has length 51 [2024-09-11 20:29:09,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:09,620 INFO L225 Difference]: With dead ends: 39 [2024-09-11 20:29:09,620 INFO L226 Difference]: Without dead ends: 35 [2024-09-11 20:29:09,621 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 95 SyntacticMatches, 8 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=297, Invalid=695, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:29:09,622 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 90 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:09,623 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 56 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:09,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-11 20:29:09,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-11 20:29:09,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 24 states have internal predecessors, (24), 2 states have call successors, (2), 1 states have call predecessors, (2), 9 states have return successors, (10), 9 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-11 20:29:09,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-09-11 20:29:09,633 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2024-09-11 20:29:09,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:09,634 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-09-11 20:29:09,634 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 24 states have internal predecessors, (45), 12 states have call successors, (12), 1 states have call predecessors, (12), 9 states have return successors, (24), 8 states have call predecessors, (24), 12 states have call successors, (24) [2024-09-11 20:29:09,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:09,634 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-09-11 20:29:09,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-11 20:29:09,635 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:09,636 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:09,655 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-09-11 20:29:09,839 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 [2024-09-11 20:29:09,839 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:09,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:09,840 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2024-09-11 20:29:09,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:09,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061548962] [2024-09-11 20:29:09,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:09,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:09,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,920 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:09,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,988 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,044 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,162 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,188 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,213 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,262 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2024-09-11 20:29:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061548962] [2024-09-11 20:29:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061548962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206260243] [2024-09-11 20:29:10,263 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:29:10,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:10,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:10,265 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) [2024-09-11 20:29:10,267 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-11 20:29:10,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:10,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:10,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 20:29:10,380 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:10,452 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2024-09-11 20:29:10,453 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:12,938 INFO L134 CoverageAnalysis]: Checked inductivity of 200 backedges. 0 proven. 164 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-11 20:29:12,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206260243] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:12,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:12,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 27 [2024-09-11 20:29:12,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72290042] [2024-09-11 20:29:12,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:12,939 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-09-11 20:29:12,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:12,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-09-11 20:29:12,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=519, Unknown=0, NotChecked=0, Total=702 [2024-09-11 20:29:12,941 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-11 20:29:13,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:13,069 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-09-11 20:29:13,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:29:13,070 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) Word has length 57 [2024-09-11 20:29:13,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:13,071 INFO L225 Difference]: With dead ends: 42 [2024-09-11 20:29:13,071 INFO L226 Difference]: Without dead ends: 38 [2024-09-11 20:29:13,072 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 107 SyntacticMatches, 9 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=359, Invalid=831, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:29:13,072 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 62 mSDsluCounter, 66 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:13,072 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 75 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:13,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-11 20:29:13,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-11 20:29:13,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 25 states have (on average 1.04) internal successors, (26), 26 states have internal predecessors, (26), 2 states have call successors, (2), 1 states have call predecessors, (2), 10 states have return successors, (11), 10 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-11 20:29:13,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-09-11 20:29:13,078 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2024-09-11 20:29:13,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:13,078 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-09-11 20:29:13,079 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 26 states have internal predecessors, (49), 13 states have call successors, (13), 1 states have call predecessors, (13), 10 states have return successors, (27), 9 states have call predecessors, (27), 13 states have call successors, (27) [2024-09-11 20:29:13,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:13,079 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-09-11 20:29:13,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-11 20:29:13,080 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:13,080 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:13,093 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-09-11 20:29:13,282 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 [2024-09-11 20:29:13,282 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:13,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:13,283 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2024-09-11 20:29:13,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:13,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804738515] [2024-09-11 20:29:13,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:13,284 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:13,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,354 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:13,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,425 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,594 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,630 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,659 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,684 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,708 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,759 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 135 refuted. 0 times theorem prover too weak. 117 trivial. 0 not checked. [2024-09-11 20:29:13,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804738515] [2024-09-11 20:29:13,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804738515] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:13,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046574985] [2024-09-11 20:29:13,760 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:29:13,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:13,760 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:13,762 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) [2024-09-11 20:29:13,764 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-11 20:29:13,900 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-11 20:29:13,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:13,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 20:29:13,902 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:13,982 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2024-09-11 20:29:13,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:17,140 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 207 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2024-09-11 20:29:17,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1046574985] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:17,141 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:17,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 29 [2024-09-11 20:29:17,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636123357] [2024-09-11 20:29:17,141 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:17,142 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-09-11 20:29:17,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:17,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-09-11 20:29:17,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=211, Invalid=601, Unknown=0, NotChecked=0, Total=812 [2024-09-11 20:29:17,143 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-11 20:29:17,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:17,272 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-09-11 20:29:17,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:29:17,273 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) Word has length 63 [2024-09-11 20:29:17,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:17,274 INFO L225 Difference]: With dead ends: 45 [2024-09-11 20:29:17,274 INFO L226 Difference]: Without dead ends: 41 [2024-09-11 20:29:17,275 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 119 SyntacticMatches, 10 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:29:17,279 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 26 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 85 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:17,280 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 85 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:17,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-11 20:29:17,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-11 20:29:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 27 states have (on average 1.037037037037037) internal successors, (28), 28 states have internal predecessors, (28), 2 states have call successors, (2), 1 states have call predecessors, (2), 11 states have return successors, (12), 11 states have call predecessors, (12), 2 states have call successors, (12) [2024-09-11 20:29:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-11 20:29:17,289 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2024-09-11 20:29:17,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:17,290 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-11 20:29:17,290 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 28 states have internal predecessors, (53), 14 states have call successors, (14), 1 states have call predecessors, (14), 11 states have return successors, (30), 10 states have call predecessors, (30), 14 states have call successors, (30) [2024-09-11 20:29:17,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:17,290 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-11 20:29:17,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:29:17,293 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:17,293 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:17,311 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-11 20:29:17,494 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 [2024-09-11 20:29:17,494 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:17,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2024-09-11 20:29:17,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:17,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683008246] [2024-09-11 20:29:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:17,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,737 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,843 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,882 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,917 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,949 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:17,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:17,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:18,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:18,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:18,054 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 165 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2024-09-11 20:29:18,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683008246] [2024-09-11 20:29:18,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683008246] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:18,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112368963] [2024-09-11 20:29:18,055 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:29:18,055 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:18,056 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:18,057 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) [2024-09-11 20:29:18,059 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-11 20:29:18,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:29:18,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:18,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 20:29:18,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:18,346 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 155 refuted. 0 times theorem prover too weak. 155 trivial. 0 not checked. [2024-09-11 20:29:18,346 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:22,546 INFO L134 CoverageAnalysis]: Checked inductivity of 310 backedges. 0 proven. 255 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2024-09-11 20:29:22,547 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112368963] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:22,547 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:22,547 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 31 [2024-09-11 20:29:22,547 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744396492] [2024-09-11 20:29:22,547 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:22,547 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-09-11 20:29:22,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:22,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-09-11 20:29:22,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=689, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:29:22,549 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-11 20:29:22,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:22,680 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-09-11 20:29:22,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:29:22,681 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) Word has length 69 [2024-09-11 20:29:22,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:22,682 INFO L225 Difference]: With dead ends: 48 [2024-09-11 20:29:22,682 INFO L226 Difference]: Without dead ends: 44 [2024-09-11 20:29:22,682 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 131 SyntacticMatches, 11 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=501, Invalid=1139, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 20:29:22,683 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 51 mSDsluCounter, 69 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:22,683 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 78 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:22,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-11 20:29:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-11 20:29:22,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 30 states have internal predecessors, (30), 2 states have call successors, (2), 1 states have call predecessors, (2), 12 states have return successors, (13), 12 states have call predecessors, (13), 2 states have call successors, (13) [2024-09-11 20:29:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-09-11 20:29:22,692 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2024-09-11 20:29:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:22,692 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-09-11 20:29:22,692 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 30 states have internal predecessors, (57), 15 states have call successors, (15), 1 states have call predecessors, (15), 12 states have return successors, (33), 11 states have call predecessors, (33), 15 states have call successors, (33) [2024-09-11 20:29:22,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:22,693 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-09-11 20:29:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 20:29:22,695 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:22,695 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:22,712 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:22,895 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 [2024-09-11 20:29:22,896 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:22,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:22,896 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2024-09-11 20:29:22,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:22,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379173060] [2024-09-11 20:29:22,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:22,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:22,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,003 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:23,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,095 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,163 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,219 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,273 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,391 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,436 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,472 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,606 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 198 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2024-09-11 20:29:23,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379173060] [2024-09-11 20:29:23,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379173060] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:23,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833966097] [2024-09-11 20:29:23,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:29:23,607 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:23,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:23,609 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) [2024-09-11 20:29:23,610 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-11 20:29:23,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-11 20:29:23,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:23,891 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 20:29:23,893 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:23,993 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 187 refuted. 0 times theorem prover too weak. 187 trivial. 0 not checked. [2024-09-11 20:29:23,994 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:29,671 INFO L134 CoverageAnalysis]: Checked inductivity of 374 backedges. 0 proven. 308 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-09-11 20:29:29,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833966097] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:29,671 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:29,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 33 [2024-09-11 20:29:29,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464105902] [2024-09-11 20:29:29,671 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:29,672 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-09-11 20:29:29,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:29,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-09-11 20:29:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=783, Unknown=0, NotChecked=0, Total=1056 [2024-09-11 20:29:29,673 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-11 20:29:29,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:29,798 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-09-11 20:29:29,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 20:29:29,798 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) Word has length 75 [2024-09-11 20:29:29,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:29,799 INFO L225 Difference]: With dead ends: 51 [2024-09-11 20:29:29,799 INFO L226 Difference]: Without dead ends: 47 [2024-09-11 20:29:29,800 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 143 SyntacticMatches, 12 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=581, Invalid=1311, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 20:29:29,800 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 80 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 87 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 87 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:29,800 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [94 Valid, 79 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 87 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:29,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-11 20:29:29,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-11 20:29:29,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 31 states have (on average 1.032258064516129) internal successors, (32), 32 states have internal predecessors, (32), 2 states have call successors, (2), 1 states have call predecessors, (2), 13 states have return successors, (14), 13 states have call predecessors, (14), 2 states have call successors, (14) [2024-09-11 20:29:29,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-09-11 20:29:29,807 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-09-11 20:29:29,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:29,807 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-09-11 20:29:29,808 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 30 states have (on average 2.033333333333333) internal successors, (61), 32 states have internal predecessors, (61), 16 states have call successors, (16), 1 states have call predecessors, (16), 13 states have return successors, (36), 12 states have call predecessors, (36), 16 states have call successors, (36) [2024-09-11 20:29:29,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-09-11 20:29:29,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-11 20:29:29,809 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:29,809 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:29,822 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:30,009 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 [2024-09-11 20:29:30,009 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:30,010 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:30,010 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2024-09-11 20:29:30,010 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:30,010 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891290302] [2024-09-11 20:29:30,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:30,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:30,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,113 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:30,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,269 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,339 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,407 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,521 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,560 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,592 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,650 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,701 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:30,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2024-09-11 20:29:30,735 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891290302] [2024-09-11 20:29:30,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891290302] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:30,735 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984401634] [2024-09-11 20:29:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:29:30,735 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:30,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:30,740 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) [2024-09-11 20:29:30,743 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-11 20:29:31,106 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-11 20:29:31,107 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:31,108 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-11 20:29:31,110 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:31,220 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 222 refuted. 0 times theorem prover too weak. 222 trivial. 0 not checked. [2024-09-11 20:29:31,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:38,346 INFO L134 CoverageAnalysis]: Checked inductivity of 444 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 78 trivial. 0 not checked. [2024-09-11 20:29:38,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984401634] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:38,346 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:38,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 35 [2024-09-11 20:29:38,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148180981] [2024-09-11 20:29:38,346 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:38,347 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2024-09-11 20:29:38,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2024-09-11 20:29:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=307, Invalid=883, Unknown=0, NotChecked=0, Total=1190 [2024-09-11 20:29:38,348 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-11 20:29:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:38,523 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-09-11 20:29:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:29:38,524 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) Word has length 81 [2024-09-11 20:29:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:38,524 INFO L225 Difference]: With dead ends: 54 [2024-09-11 20:29:38,525 INFO L226 Difference]: Without dead ends: 50 [2024-09-11 20:29:38,525 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 155 SyntacticMatches, 13 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=667, Invalid=1495, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 20:29:38,526 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 151 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 102 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:38,526 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 95 Invalid, 170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 102 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:38,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-11 20:29:38,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-11 20:29:38,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 34 states have internal predecessors, (34), 2 states have call successors, (2), 1 states have call predecessors, (2), 14 states have return successors, (15), 14 states have call predecessors, (15), 2 states have call successors, (15) [2024-09-11 20:29:38,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-09-11 20:29:38,533 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2024-09-11 20:29:38,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:38,533 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-09-11 20:29:38,533 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 32 states have (on average 2.03125) internal successors, (65), 34 states have internal predecessors, (65), 17 states have call successors, (17), 1 states have call predecessors, (17), 14 states have return successors, (39), 13 states have call predecessors, (39), 17 states have call successors, (39) [2024-09-11 20:29:38,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:38,534 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-09-11 20:29:38,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-11 20:29:38,534 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:38,534 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:38,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-11 20:29:38,738 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 [2024-09-11 20:29:38,739 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:38,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:38,739 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2024-09-11 20:29:38,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:38,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1607451925] [2024-09-11 20:29:38,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:38,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:38,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:38,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:38,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:38,928 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:38,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,016 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,115 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,180 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,287 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,332 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,370 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,403 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,431 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,457 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,482 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 273 refuted. 0 times theorem prover too weak. 247 trivial. 0 not checked. [2024-09-11 20:29:39,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1607451925] [2024-09-11 20:29:39,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1607451925] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:39,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225541979] [2024-09-11 20:29:39,539 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:29:39,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:39,540 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:39,541 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) [2024-09-11 20:29:39,543 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-09-11 20:29:39,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:39,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 20:29:39,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:40,049 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 260 refuted. 0 times theorem prover too weak. 260 trivial. 0 not checked. [2024-09-11 20:29:40,050 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:49,219 INFO L134 CoverageAnalysis]: Checked inductivity of 520 backedges. 0 proven. 429 refuted. 0 times theorem prover too weak. 91 trivial. 0 not checked. [2024-09-11 20:29:49,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225541979] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:49,220 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:49,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 37 [2024-09-11 20:29:49,220 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947261668] [2024-09-11 20:29:49,220 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:49,221 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-11 20:29:49,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:49,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-11 20:29:49,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=989, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:29:49,222 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-11 20:29:49,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:49,370 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-09-11 20:29:49,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:29:49,370 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) Word has length 87 [2024-09-11 20:29:49,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:49,371 INFO L225 Difference]: With dead ends: 57 [2024-09-11 20:29:49,372 INFO L226 Difference]: Without dead ends: 53 [2024-09-11 20:29:49,372 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 167 SyntacticMatches, 14 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 993 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=759, Invalid=1691, Unknown=0, NotChecked=0, Total=2450 [2024-09-11 20:29:49,373 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:49,373 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 94 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:49,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-11 20:29:49,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-11 20:29:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 36 states have internal predecessors, (36), 2 states have call successors, (2), 1 states have call predecessors, (2), 15 states have return successors, (16), 15 states have call predecessors, (16), 2 states have call successors, (16) [2024-09-11 20:29:49,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-09-11 20:29:49,379 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2024-09-11 20:29:49,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:49,380 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-09-11 20:29:49,380 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 36 states have internal predecessors, (69), 18 states have call successors, (18), 1 states have call predecessors, (18), 15 states have return successors, (42), 14 states have call predecessors, (42), 18 states have call successors, (42) [2024-09-11 20:29:49,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:49,381 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-09-11 20:29:49,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-11 20:29:49,382 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:49,382 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:49,398 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:49,582 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 [2024-09-11 20:29:49,583 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:49,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2024-09-11 20:29:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:49,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520197439] [2024-09-11 20:29:49,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:49,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:49,703 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:49,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:49,812 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:49,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:49,898 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:49,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:49,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:49,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,068 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,232 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,279 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,326 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,361 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,393 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,421 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,446 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:50,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:50,503 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 315 refuted. 0 times theorem prover too weak. 287 trivial. 0 not checked. [2024-09-11 20:29:50,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520197439] [2024-09-11 20:29:50,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520197439] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:50,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097154966] [2024-09-11 20:29:50,504 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:29:50,504 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:50,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:50,507 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) [2024-09-11 20:29:50,508 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-09-11 20:29:51,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:51,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:51,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 20:29:51,003 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:51,096 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 301 refuted. 0 times theorem prover too weak. 301 trivial. 0 not checked. [2024-09-11 20:29:51,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:02,325 INFO L134 CoverageAnalysis]: Checked inductivity of 602 backedges. 0 proven. 497 refuted. 0 times theorem prover too weak. 105 trivial. 0 not checked. [2024-09-11 20:30:02,326 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1097154966] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:02,326 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:02,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-11 20:30:02,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732972045] [2024-09-11 20:30:02,326 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:02,327 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 20:30:02,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:02,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 20:30:02,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:30:02,328 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-09-11 20:30:02,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:02,527 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-09-11 20:30:02,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:30:02,528 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) Word has length 93 [2024-09-11 20:30:02,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:02,529 INFO L225 Difference]: With dead ends: 60 [2024-09-11 20:30:02,529 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 20:30:02,530 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 179 SyntacticMatches, 16 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1101 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 20:30:02,532 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 84 mSDsluCounter, 90 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:02,532 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [101 Valid, 99 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:02,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 20:30:02,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-09-11 20:30:02,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 37 states have (on average 1.027027027027027) internal successors, (38), 38 states have internal predecessors, (38), 2 states have call successors, (2), 1 states have call predecessors, (2), 16 states have return successors, (17), 16 states have call predecessors, (17), 2 states have call successors, (17) [2024-09-11 20:30:02,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-11 20:30:02,542 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2024-09-11 20:30:02,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:02,542 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-11 20:30:02,543 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 36 states have (on average 2.0) internal successors, (72), 37 states have internal predecessors, (72), 18 states have call successors, (18), 1 states have call predecessors, (18), 16 states have return successors, (44), 15 states have call predecessors, (44), 18 states have call successors, (44) [2024-09-11 20:30:02,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:02,543 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-11 20:30:02,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-11 20:30:02,547 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:02,547 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:02,569 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-09-11 20:30:02,747 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 [2024-09-11 20:30:02,748 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:02,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:02,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2024-09-11 20:30:02,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:02,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416355337] [2024-09-11 20:30:02,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:02,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:02,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:02,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,253 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,377 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,465 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,548 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,624 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,695 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,833 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:03,958 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:03,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:04,023 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:04,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:04,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:04,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:04,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:04,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:04,213 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 15 proven. 345 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-11 20:30:04,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416355337] [2024-09-11 20:30:04,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1416355337] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:04,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618941540] [2024-09-11 20:30:04,213 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:30:04,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:04,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:04,215 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) [2024-09-11 20:30:04,217 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-09-11 20:30:04,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-11 20:30:04,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:04,868 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 67 conjuncts are in the unsatisfiable core [2024-09-11 20:30:04,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:04,958 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-11 20:30:04,958 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:05,795 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 345 refuted. 0 times theorem prover too weak. 345 trivial. 0 not checked. [2024-09-11 20:30:05,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618941540] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:05,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:05,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 35, 35] total 37 [2024-09-11 20:30:05,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523852489] [2024-09-11 20:30:05,796 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:05,796 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2024-09-11 20:30:05,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:05,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2024-09-11 20:30:05,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1260, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:30:05,797 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) [2024-09-11 20:30:06,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:06,663 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-11 20:30:06,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-09-11 20:30:06,664 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) Word has length 99 [2024-09-11 20:30:06,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:06,665 INFO L225 Difference]: With dead ends: 63 [2024-09-11 20:30:06,665 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 20:30:06,667 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=4230, Unknown=0, NotChecked=0, Total=4422 [2024-09-11 20:30:06,667 INFO L434 NwaCegarLoop]: 21 mSDtfsCounter, 33 mSDsluCounter, 646 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 1233 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:06,667 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [50 Valid, 667 Invalid, 1233 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 1233 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-11 20:30:06,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 20:30:06,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-11 20:30:06,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 40 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (18), 17 states have call predecessors, (18), 2 states have call successors, (18) [2024-09-11 20:30:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-09-11 20:30:06,674 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2024-09-11 20:30:06,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:06,675 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-09-11 20:30:06,675 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 21 states have internal predecessors, (41), 1 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 16 states have call predecessors, (17), 1 states have call successors, (17) [2024-09-11 20:30:06,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:06,675 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-09-11 20:30:06,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-11 20:30:06,676 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:06,676 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:06,693 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-09-11 20:30:06,877 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 [2024-09-11 20:30:06,877 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:06,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:06,877 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2024-09-11 20:30:06,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:06,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052634196] [2024-09-11 20:30:06,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:06,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:06,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:07,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,270 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,364 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,451 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,618 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,682 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,770 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,818 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,901 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,936 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,969 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,998 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,049 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,080 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 360 proven. 48 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-11 20:30:08,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052634196] [2024-09-11 20:30:08,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052634196] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:08,080 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049682917] [2024-09-11 20:30:08,081 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:30:08,081 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:08,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:08,083 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) [2024-09-11 20:30:08,084 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-09-11 20:30:08,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:30:08,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:08,715 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-11 20:30:08,717 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:08,838 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 392 proven. 0 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-11 20:30:08,838 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:30:08,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049682917] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:30:08,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:30:08,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [22] total 25 [2024-09-11 20:30:08,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711669177] [2024-09-11 20:30:08,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:30:08,839 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-09-11 20:30:08,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:08,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-09-11 20:30:08,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:30:08,840 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2024-09-11 20:30:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:09,043 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2024-09-11 20:30:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:30:09,043 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) Word has length 105 [2024-09-11 20:30:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:09,044 INFO L225 Difference]: With dead ends: 59 [2024-09-11 20:30:09,044 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 20:30:09,044 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=508, Invalid=1132, Unknown=0, NotChecked=0, Total=1640 [2024-09-11 20:30:09,045 INFO L434 NwaCegarLoop]: 36 mSDtfsCounter, 2 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 90 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 90 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 90 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:09,045 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 132 Invalid, 90 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 90 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:30:09,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 20:30:09,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 20:30:09,045 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) [2024-09-11 20:30:09,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 20:30:09,046 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 105 [2024-09-11 20:30:09,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:09,046 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 20:30:09,046 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.0) internal successors, (40), 20 states have internal predecessors, (40), 2 states have call successors, (2), 1 states have call predecessors, (2), 17 states have return successors, (17), 17 states have call predecessors, (17), 2 states have call successors, (17) [2024-09-11 20:30:09,046 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:09,046 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 20:30:09,046 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 20:30:09,048 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 20:30:09,062 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2024-09-11 20:30:09,249 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 [2024-09-11 20:30:09,251 INFO L408 BasicCegarLoop]: Path program histogram: [16, 1] [2024-09-11 20:30:09,253 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 20:30:10,342 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 20:30:10,373 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:30:10 BoogieIcfgContainer [2024-09-11 20:30:10,374 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 20:30:10,374 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 20:30:10,374 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 20:30:10,374 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 20:30:10,375 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:28:58" (3/4) ... [2024-09-11 20:30:10,376 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 20:30:10,380 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2024-09-11 20:30:10,383 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-11 20:30:10,384 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-11 20:30:10,384 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 20:30:10,384 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 20:30:10,462 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 20:30:10,463 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 20:30:10,463 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 20:30:10,464 INFO L158 Benchmark]: Toolchain (without parser) took 72707.89ms. Allocated memory was 157.3MB in the beginning and 570.4MB in the end (delta: 413.1MB). Free memory was 88.0MB in the beginning and 363.8MB in the end (delta: -275.8MB). Peak memory consumption was 139.0MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,464 INFO L158 Benchmark]: CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 20:30:10,464 INFO L158 Benchmark]: CACSL2BoogieTranslator took 261.47ms. Allocated memory is still 157.3MB. Free memory was 87.8MB in the beginning and 122.6MB in the end (delta: -34.8MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,465 INFO L158 Benchmark]: Boogie Procedure Inliner took 25.71ms. Allocated memory is still 157.3MB. Free memory was 122.6MB in the beginning and 121.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,465 INFO L158 Benchmark]: Boogie Preprocessor took 20.80ms. Allocated memory is still 157.3MB. Free memory was 121.2MB in the beginning and 119.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 20:30:10,465 INFO L158 Benchmark]: RCFGBuilder took 217.05ms. Allocated memory is still 157.3MB. Free memory was 119.1MB in the beginning and 109.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,466 INFO L158 Benchmark]: TraceAbstraction took 72087.29ms. Allocated memory was 157.3MB in the beginning and 570.4MB in the end (delta: 413.1MB). Free memory was 108.7MB in the beginning and 368.0MB in the end (delta: -259.3MB). Peak memory consumption was 332.5MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,466 INFO L158 Benchmark]: Witness Printer took 88.67ms. Allocated memory is still 570.4MB. Free memory was 368.0MB in the beginning and 363.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 20:30:10,470 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.20ms. Allocated memory is still 157.3MB. Free memory is still 117.1MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 261.47ms. Allocated memory is still 157.3MB. Free memory was 87.8MB in the beginning and 122.6MB in the end (delta: -34.8MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 25.71ms. Allocated memory is still 157.3MB. Free memory was 122.6MB in the beginning and 121.2MB in the end (delta: 1.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 20.80ms. Allocated memory is still 157.3MB. Free memory was 121.2MB in the beginning and 119.9MB in the end (delta: 1.4MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 217.05ms. Allocated memory is still 157.3MB. Free memory was 119.1MB in the beginning and 109.4MB in the end (delta: 9.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * TraceAbstraction took 72087.29ms. Allocated memory was 157.3MB in the beginning and 570.4MB in the end (delta: 413.1MB). Free memory was 108.7MB in the beginning and 368.0MB in the end (delta: -259.3MB). Peak memory consumption was 332.5MB. Max. memory is 16.1GB. * Witness Printer took 88.67ms. Allocated memory is still 570.4MB. Free memory was 368.0MB in the beginning and 363.8MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. 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 2 procedures, 14 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 70.9s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 16, EmptinessCheckTime: 0.0s, AutomataDifference: 2.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1005 SdHoareTripleChecker+Valid, 1.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 837 mSDsluCounter, 1773 SdHoareTripleChecker+Invalid, 1.1s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1580 mSDsCounter, 294 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2377 IncrementalHoareTripleChecker+Invalid, 2671 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 294 mSolverCounterUnsat, 193 mSDtfsCounter, 2377 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2445 GetRequests, 1778 SyntacticMatches, 120 SemanticMatches, 547 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7042 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=59occurred in iteration=16, InterpolantAutomatonStates: 237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 17 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 60.4s InterpolantComputationTime, 1929 NumberOfCodeBlocks, 1929 NumberOfCodeBlocksAsserted, 100 NumberOfCheckSat, 2736 ConstructedInterpolants, 0 QuantifiedInterpolants, 7826 SizeOfPredicates, 121 NumberOfNonLiveVariables, 2576 ConjunctsInSsa, 369 ConjunctsInUnsatCore, 48 InterpolantComputations, 2 PerfectInterpolantSequences, 6160/13088 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id. Ensures: ((((((((((((((((((3 == \result) && (\old(x) == 3)) || (15 < \old(x))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((2 == \result) && (\old(x) == 2))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((8 == \result) && (\old(x) == 8))) || ((7 == \result) && (7 == \old(x)))) || ((12 == \result) && (\old(x) == 12))) || ((\result == 1) && (\old(x) == 1))) || ((14 == \result) && (\old(x) == 14))) || ((\old(x) == 4) && (4 == \result))) || ((\old(x) == 15) && (15 == \result))) || ((13 == \result) && (\old(x) == 13))) || ((\result == 0) && (\old(x) == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-11 20:30:10,505 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