./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/recursive-simple/id_i20_o20-1.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_i20_o20-1.c -s /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/certificate-witnesses-artifact/automizer --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 --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 20:29:00,979 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-11 20:29:01,021 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-11 20:29:01,025 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-11 20:29:01,025 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-11 20:29:01,047 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-11 20:29:01,048 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-11 20:29:01,048 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-11 20:29:01,049 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-11 20:29:01,053 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-11 20:29:01,053 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-11 20:29:01,053 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-11 20:29:01,054 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-11 20:29:01,054 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-11 20:29:01,054 INFO L153 SettingsManager]: * Use SBE=true [2024-09-11 20:29:01,054 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-11 20:29:01,054 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-11 20:29:01,055 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-11 20:29:01,055 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-11 20:29:01,055 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-11 20:29:01,055 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-11 20:29:01,057 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-11 20:29:01,058 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-11 20:29:01,058 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-11 20:29:01,058 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-11 20:29:01,058 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-11 20:29:01,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:29:01,059 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-11 20:29:01,059 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-11 20:29:01,059 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-11 20:29:01,059 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-11 20:29:01,059 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-11 20:29:01,059 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-11 20:29:01,060 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-11 20:29:01,060 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-11 20:29:01,060 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-11 20:29:01,061 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/certificate-witnesses-artifact/automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> c3376ee309c42e8280cfc81381fd928e4a895fffc424cbfa81d01112976a2d85 Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> All Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: YAML Format version -> 2.1 [2024-09-11 20:29:01,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-11 20:29:01,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-11 20:29:01,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-11 20:29:01,290 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-11 20:29:01,290 INFO L274 PluginConnector]: CDTParser initialized [2024-09-11 20:29:01,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-11 20:29:02,417 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-11 20:29:02,578 INFO L384 CDTParser]: Found 1 translation units. [2024-09-11 20:29:02,578 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/recursive-simple/id_i20_o20-1.c [2024-09-11 20:29:02,583 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/7d67494b6/3355643eb6bc4af992330e35f77538f5/FLAG81b619d63 [2024-09-11 20:29:03,002 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/7d67494b6/3355643eb6bc4af992330e35f77538f5 [2024-09-11 20:29:03,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-11 20:29:03,005 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-09-11 20:29:03,006 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-11 20:29:03,006 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-11 20:29:03,009 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-11 20:29:03,010 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,011 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56d7443 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03, skipping insertion in model container [2024-09-11 20:29:03,011 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,024 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-11 20:29:03,137 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_i20_o20-1.c[454,467] [2024-09-11 20:29:03,139 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:29:03,146 INFO L200 MainTranslator]: Completed pre-run [2024-09-11 20:29:03,156 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_i20_o20-1.c[454,467] [2024-09-11 20:29:03,156 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-11 20:29:03,170 INFO L204 MainTranslator]: Completed translation [2024-09-11 20:29:03,170 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03 WrapperNode [2024-09-11 20:29:03,170 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-11 20:29:03,171 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-11 20:29:03,172 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-11 20:29:03,172 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-11 20:29:03,177 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,181 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,191 INFO L138 Inliner]: procedures = 13, calls = 9, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 18 [2024-09-11 20:29:03,191 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-11 20:29:03,192 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-11 20:29:03,192 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-11 20:29:03,192 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-11 20:29:03,199 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,199 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,199 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,206 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 20:29:03,206 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,207 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,208 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,208 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,209 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,210 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-11 20:29:03,210 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-11 20:29:03,210 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-11 20:29:03,211 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-11 20:29:03,211 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (1/1) ... [2024-09-11 20:29:03,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-11 20:29:03,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:03,239 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 20:29:03,241 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 20:29:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-11 20:29:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-11 20:29:03,275 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-11 20:29:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-09-11 20:29:03,275 INFO L130 BoogieDeclarations]: Found specification of procedure id [2024-09-11 20:29:03,275 INFO L138 BoogieDeclarations]: Found implementation of procedure id [2024-09-11 20:29:03,323 INFO L242 CfgBuilder]: Building ICFG [2024-09-11 20:29:03,325 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-11 20:29:03,445 INFO L? ?]: Removed 5 outVars from TransFormulas that were not future-live. [2024-09-11 20:29:03,448 INFO L291 CfgBuilder]: Performing block encoding [2024-09-11 20:29:03,475 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-11 20:29:03,476 INFO L318 CfgBuilder]: Removed 0 assume(true) statements. [2024-09-11 20:29:03,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:29:03 BoogieIcfgContainer [2024-09-11 20:29:03,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-11 20:29:03,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-11 20:29:03,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-11 20:29:03,481 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-11 20:29:03,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 08:29:03" (1/3) ... [2024-09-11 20:29:03,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4660e417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:29:03, skipping insertion in model container [2024-09-11 20:29:03,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 08:29:03" (2/3) ... [2024-09-11 20:29:03,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4660e417 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 08:29:03, skipping insertion in model container [2024-09-11 20:29:03,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:29:03" (3/3) ... [2024-09-11 20:29:03,484 INFO L112 eAbstractionObserver]: Analyzing ICFG id_i20_o20-1.c [2024-09-11 20:29:03,499 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:All NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-11 20:29:03,500 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-09-11 20:29:03,551 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-11 20:29:03,558 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;@2a7359cb, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-11 20:29:03,559 INFO L337 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-09-11 20:29:03,562 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 20:29:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-09-11 20:29:03,568 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:03,568 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:03,570 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:03,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:03,574 INFO L85 PathProgramCache]: Analyzing trace with hash 1493244868, now seen corresponding path program 1 times [2024-09-11 20:29:03,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:03,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516638619] [2024-09-11 20:29:03,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:03,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:03,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:03,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,786 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 20:29:03,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:03,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516638619] [2024-09-11 20:29:03,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516638619] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:29:03,788 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-11 20:29:03,788 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-09-11 20:29:03,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060668013] [2024-09-11 20:29:03,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:29:03,792 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-11 20:29:03,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:03,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-11 20:29:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-09-11 20:29:03,809 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 20:29:03,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:03,857 INFO L93 Difference]: Finished difference Result 22 states and 25 transitions. [2024-09-11 20:29:03,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-11 20:29:03,859 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 20:29:03,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:03,864 INFO L225 Difference]: With dead ends: 22 [2024-09-11 20:29:03,864 INFO L226 Difference]: Without dead ends: 14 [2024-09-11 20:29:03,866 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 20:29:03,868 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 20:29:03,869 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 20:29:03,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2024-09-11 20:29:03,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2024-09-11 20:29:03,899 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 20:29:03,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2024-09-11 20:29:03,901 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 9 [2024-09-11 20:29:03,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:03,901 INFO L474 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2024-09-11 20:29:03,901 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 20:29:03,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:03,902 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2024-09-11 20:29:03,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2024-09-11 20:29:03,903 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:03,903 INFO L216 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:03,903 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-11 20:29:03,903 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:03,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:03,904 INFO L85 PathProgramCache]: Analyzing trace with hash -642736818, now seen corresponding path program 1 times [2024-09-11 20:29:03,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:03,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020776670] [2024-09-11 20:29:03,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:03,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:03,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:03,976 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:03,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,066 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:04,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,124 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 20:29:04,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020776670] [2024-09-11 20:29:04,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020776670] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:04,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799355505] [2024-09-11 20:29:04,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:04,127 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:04,127 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:04,128 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 20:29:04,130 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 20:29:04,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,173 INFO L262 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-09-11 20:29:04,178 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:04,241 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 20:29:04,241 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:04,421 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 20:29:04,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799355505] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:04,421 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:04,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 7] total 12 [2024-09-11 20:29:04,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999218041] [2024-09-11 20:29:04,423 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:04,424 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-11 20:29:04,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:04,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-11 20:29:04,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2024-09-11 20:29:04,427 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:29:04,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:04,469 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2024-09-11 20:29:04,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-09-11 20:29:04,469 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) Word has length 15 [2024-09-11 20:29:04,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:04,470 INFO L225 Difference]: With dead ends: 21 [2024-09-11 20:29:04,470 INFO L226 Difference]: Without dead ends: 17 [2024-09-11 20:29:04,470 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=47, Invalid=109, Unknown=0, NotChecked=0, Total=156 [2024-09-11 20:29:04,471 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 10 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:04,471 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 37 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:04,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2024-09-11 20:29:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2024-09-11 20:29:04,476 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 20:29:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2024-09-11 20:29:04,477 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2024-09-11 20:29:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:04,477 INFO L474 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2024-09-11 20:29:04,477 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 10 states have (on average 2.0) internal successors, (20), 11 states have internal predecessors, (20), 5 states have call successors, (5), 1 states have call predecessors, (5), 3 states have return successors, (5), 2 states have call predecessors, (5), 5 states have call successors, (5) [2024-09-11 20:29:04,478 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2024-09-11 20:29:04,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-09-11 20:29:04,479 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:04,479 INFO L216 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:04,491 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-11 20:29:04,682 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 20:29:04,683 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:04,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:04,683 INFO L85 PathProgramCache]: Analyzing trace with hash -2123675004, now seen corresponding path program 2 times [2024-09-11 20:29:04,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:04,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978426245] [2024-09-11 20:29:04,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:04,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:04,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:04,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,793 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:04,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,820 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:04,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:04,853 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 20:29:04,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:04,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978426245] [2024-09-11 20:29:04,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978426245] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:04,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329379764] [2024-09-11 20:29:04,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:29:04,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:04,855 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:04,857 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 20:29:04,858 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 20:29:04,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:04,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:04,895 INFO L262 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-09-11 20:29:04,896 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:04,940 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 20:29:04,940 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:05,207 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 20:29:05,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329379764] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:05,208 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:05,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 9] total 14 [2024-09-11 20:29:05,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106598573] [2024-09-11 20:29:05,208 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:05,209 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-09-11 20:29:05,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:05,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-09-11 20:29:05,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2024-09-11 20:29:05,211 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:29:05,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:05,254 INFO L93 Difference]: Finished difference Result 24 states and 25 transitions. [2024-09-11 20:29:05,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-11 20:29:05,255 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) Word has length 21 [2024-09-11 20:29:05,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:05,255 INFO L225 Difference]: With dead ends: 24 [2024-09-11 20:29:05,255 INFO L226 Difference]: Without dead ends: 20 [2024-09-11 20:29:05,256 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:29:05,256 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 32 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:05,257 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 35 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:05,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2024-09-11 20:29:05,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2024-09-11 20:29:05,260 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 20:29:05,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2024-09-11 20:29:05,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 21 [2024-09-11 20:29:05,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:05,261 INFO L474 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2024-09-11 20:29:05,261 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 12 states have (on average 2.0) internal successors, (24), 13 states have internal predecessors, (24), 6 states have call successors, (6), 1 states have call predecessors, (6), 4 states have return successors, (8), 3 states have call predecessors, (8), 6 states have call successors, (8) [2024-09-11 20:29:05,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:05,261 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2024-09-11 20:29:05,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2024-09-11 20:29:05,262 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:05,262 INFO L216 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:05,274 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-11 20:29:05,462 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 20:29:05,463 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:05,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:05,463 INFO L85 PathProgramCache]: Analyzing trace with hash 54189198, now seen corresponding path program 3 times [2024-09-11 20:29:05,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:05,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432591301] [2024-09-11 20:29:05,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:05,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:05,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,502 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:05,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,544 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,580 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,598 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:05,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:05,618 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 20:29:05,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:05,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432591301] [2024-09-11 20:29:05,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432591301] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790471094] [2024-09-11 20:29:05,619 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:29:05,619 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:05,619 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:05,620 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 20:29:05,622 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 20:29:05,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-09-11 20:29:05,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:05,654 INFO L262 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-11 20:29:05,655 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:05,693 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 20:29:05,694 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:06,094 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 20:29:06,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790471094] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:06,094 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:06,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8, 11] total 16 [2024-09-11 20:29:06,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364296937] [2024-09-11 20:29:06,095 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:06,095 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-09-11 20:29:06,097 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:06,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-09-11 20:29:06,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2024-09-11 20:29:06,099 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:29:06,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:06,156 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2024-09-11 20:29:06,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-09-11 20:29:06,158 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) Word has length 27 [2024-09-11 20:29:06,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:06,159 INFO L225 Difference]: With dead ends: 27 [2024-09-11 20:29:06,159 INFO L226 Difference]: Without dead ends: 23 [2024-09-11 20:29:06,159 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 48 SyntacticMatches, 4 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2024-09-11 20:29:06,160 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 19 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:06,160 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:06,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2024-09-11 20:29:06,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2024-09-11 20:29:06,165 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 20:29:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2024-09-11 20:29:06,167 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 27 [2024-09-11 20:29:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:06,167 INFO L474 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2024-09-11 20:29:06,167 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 14 states have (on average 2.0) internal successors, (28), 15 states have internal predecessors, (28), 7 states have call successors, (7), 1 states have call predecessors, (7), 5 states have return successors, (11), 4 states have call predecessors, (11), 7 states have call successors, (11) [2024-09-11 20:29:06,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:06,168 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2024-09-11 20:29:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-09-11 20:29:06,169 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:06,169 INFO L216 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:06,183 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-09-11 20:29:06,370 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 20:29:06,370 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:06,371 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:06,371 INFO L85 PathProgramCache]: Analyzing trace with hash -1269749436, now seen corresponding path program 4 times [2024-09-11 20:29:06,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:06,371 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704269634] [2024-09-11 20:29:06,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:06,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:06,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:06,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,468 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:06,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,504 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:06,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:06,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:06,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:06,562 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 20:29:06,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704269634] [2024-09-11 20:29:06,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704269634] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:06,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694505785] [2024-09-11 20:29:06,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:29:06,563 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:06,563 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:06,565 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 20:29:06,567 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 20:29:06,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:29:06,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:06,609 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-09-11 20:29:06,610 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:06,654 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 20:29:06,655 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:07,217 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 20:29:07,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [694505785] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:07,218 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:07,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 13] total 18 [2024-09-11 20:29:07,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901639401] [2024-09-11 20:29:07,218 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:07,218 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-09-11 20:29:07,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:07,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-09-11 20:29:07,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=219, Unknown=0, NotChecked=0, Total=306 [2024-09-11 20:29:07,220 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-11 20:29:07,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:07,275 INFO L93 Difference]: Finished difference Result 30 states and 31 transitions. [2024-09-11 20:29:07,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-09-11 20:29:07,276 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) Word has length 33 [2024-09-11 20:29:07,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:07,277 INFO L225 Difference]: With dead ends: 30 [2024-09-11 20:29:07,277 INFO L226 Difference]: Without dead ends: 26 [2024-09-11 20:29:07,277 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 60 SyntacticMatches, 5 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:29:07,278 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 13 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 58 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:07,278 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 52 Invalid, 58 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2024-09-11 20:29:07,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2024-09-11 20:29:07,284 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 20:29:07,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2024-09-11 20:29:07,287 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 33 [2024-09-11 20:29:07,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:07,287 INFO L474 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2024-09-11 20:29:07,287 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 16 states have (on average 2.0) internal successors, (32), 17 states have internal predecessors, (32), 8 states have call successors, (8), 1 states have call predecessors, (8), 6 states have return successors, (14), 5 states have call predecessors, (14), 8 states have call successors, (14) [2024-09-11 20:29:07,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:07,288 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2024-09-11 20:29:07,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-09-11 20:29:07,289 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:07,290 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:07,303 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:07,490 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 20:29:07,490 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:07,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -4035634, now seen corresponding path program 5 times [2024-09-11 20:29:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:07,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281042987] [2024-09-11 20:29:07,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:07,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:07,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:07,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,613 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,634 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,654 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,678 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:07,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:07,709 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 20:29:07,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281042987] [2024-09-11 20:29:07,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281042987] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:07,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187692421] [2024-09-11 20:29:07,710 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:29:07,710 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:07,710 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:07,712 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 20:29:07,712 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 20:29:07,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2024-09-11 20:29:07,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:07,758 INFO L262 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-09-11 20:29:07,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:07,808 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 20:29:07,808 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:08,641 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 20:29:08,641 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [187692421] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:08,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:08,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 15] total 20 [2024-09-11 20:29:08,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942726673] [2024-09-11 20:29:08,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:08,642 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-09-11 20:29:08,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:08,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-09-11 20:29:08,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=273, Unknown=0, NotChecked=0, Total=380 [2024-09-11 20:29:08,643 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-11 20:29:08,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:08,715 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2024-09-11 20:29:08,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-11 20:29:08,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) Word has length 39 [2024-09-11 20:29:08,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:08,716 INFO L225 Difference]: With dead ends: 33 [2024-09-11 20:29:08,716 INFO L226 Difference]: Without dead ends: 29 [2024-09-11 20:29:08,717 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 72 SyntacticMatches, 6 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=187, Invalid=413, Unknown=0, NotChecked=0, Total=600 [2024-09-11 20:29:08,718 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 50 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 36 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 57 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 50 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:08,719 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [36 Valid, 51 Invalid, 57 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 50 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:08,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2024-09-11 20:29:08,725 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2024-09-11 20:29:08,725 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 20:29:08,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2024-09-11 20:29:08,726 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 39 [2024-09-11 20:29:08,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:08,726 INFO L474 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2024-09-11 20:29:08,726 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 18 states have (on average 2.0) internal successors, (36), 19 states have internal predecessors, (36), 9 states have call successors, (9), 1 states have call predecessors, (9), 7 states have return successors, (17), 6 states have call predecessors, (17), 9 states have call successors, (17) [2024-09-11 20:29:08,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:08,727 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2024-09-11 20:29:08,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2024-09-11 20:29:08,728 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:08,728 INFO L216 NwaCegarLoop]: trace histogram [7, 7, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:08,741 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 20:29:08,931 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 20:29:08,932 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:08,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:08,932 INFO L85 PathProgramCache]: Analyzing trace with hash -1047611388, now seen corresponding path program 6 times [2024-09-11 20:29:08,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:08,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570211593] [2024-09-11 20:29:08,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:08,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:08,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:08,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:08,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,004 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,046 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,070 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,110 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:09,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:09,147 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 20:29:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570211593] [2024-09-11 20:29:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570211593] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347062332] [2024-09-11 20:29:09,148 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:29:09,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:09,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:09,150 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 20:29:09,159 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 20:29:09,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2024-09-11 20:29:09,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:09,220 INFO L262 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-09-11 20:29:09,222 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:09,281 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 20:29:09,282 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:10,392 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 20:29:10,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347062332] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:10,392 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:10,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11, 17] total 22 [2024-09-11 20:29:10,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197261748] [2024-09-11 20:29:10,393 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:10,393 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-09-11 20:29:10,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:10,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-09-11 20:29:10,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2024-09-11 20:29:10,394 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-11 20:29:10,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:10,466 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2024-09-11 20:29:10,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-11 20:29:10,467 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) Word has length 45 [2024-09-11 20:29:10,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:10,468 INFO L225 Difference]: With dead ends: 36 [2024-09-11 20:29:10,468 INFO L226 Difference]: Without dead ends: 32 [2024-09-11 20:29:10,468 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 84 SyntacticMatches, 7 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=237, Invalid=519, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:29:10,469 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 17 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:10,469 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 64 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:10,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2024-09-11 20:29:10,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2024-09-11 20:29:10,473 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 20:29:10,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2024-09-11 20:29:10,474 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 45 [2024-09-11 20:29:10,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:10,474 INFO L474 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2024-09-11 20:29:10,474 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 20 states have (on average 2.0) internal successors, (40), 21 states have internal predecessors, (40), 10 states have call successors, (10), 1 states have call predecessors, (10), 8 states have return successors, (20), 7 states have call predecessors, (20), 10 states have call successors, (20) [2024-09-11 20:29:10,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:10,475 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2024-09-11 20:29:10,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-09-11 20:29:10,475 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:10,476 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:10,489 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-11 20:29:10,679 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 20:29:10,680 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:10,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:10,680 INFO L85 PathProgramCache]: Analyzing trace with hash 1466649358, now seen corresponding path program 7 times [2024-09-11 20:29:10,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:10,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345799055] [2024-09-11 20:29:10,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:10,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,733 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:10,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,831 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,891 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,930 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,946 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:10,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:10,968 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 20:29:10,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345799055] [2024-09-11 20:29:10,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345799055] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:10,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420623128] [2024-09-11 20:29:10,969 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:29:10,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:10,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:10,971 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 20:29:10,971 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 20:29:11,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:11,039 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-09-11 20:29:11,040 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:11,098 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 20:29:11,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:12,508 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 20:29:12,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420623128] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:12,509 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:12,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 19] total 24 [2024-09-11 20:29:12,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561418680] [2024-09-11 20:29:12,509 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:12,510 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2024-09-11 20:29:12,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:12,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2024-09-11 20:29:12,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=399, Unknown=0, NotChecked=0, Total=552 [2024-09-11 20:29:12,511 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-09-11 20:29:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:12,593 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2024-09-11 20:29:12,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-11 20:29:12,593 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) Word has length 51 [2024-09-11 20:29:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:12,594 INFO L225 Difference]: With dead ends: 39 [2024-09-11 20:29:12,594 INFO L226 Difference]: Without dead ends: 35 [2024-09-11 20:29:12,595 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 96 SyntacticMatches, 8 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2024-09-11 20:29:12,595 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 44 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:12,595 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [54 Valid, 64 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:12,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2024-09-11 20:29:12,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2024-09-11 20:29:12,599 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 20:29:12,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2024-09-11 20:29:12,599 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 51 [2024-09-11 20:29:12,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:12,600 INFO L474 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2024-09-11 20:29:12,600 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 22 states have (on average 2.0) internal successors, (44), 23 states have internal predecessors, (44), 11 states have call successors, (11), 1 states have call predecessors, (11), 9 states have return successors, (23), 8 states have call predecessors, (23), 11 states have call successors, (23) [2024-09-11 20:29:12,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:12,600 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2024-09-11 20:29:12,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-09-11 20:29:12,601 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:12,601 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:12,615 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 20:29:12,805 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 20:29:12,806 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:12,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:12,806 INFO L85 PathProgramCache]: Analyzing trace with hash 335541956, now seen corresponding path program 8 times [2024-09-11 20:29:12,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:12,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782506766] [2024-09-11 20:29:12,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:12,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:12,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:12,861 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:12,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:12,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:12,944 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:12,974 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:12,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,026 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,045 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,062 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,077 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:13,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:13,098 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 20:29:13,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782506766] [2024-09-11 20:29:13,098 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1782506766] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:13,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294924820] [2024-09-11 20:29:13,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:29:13,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:13,099 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:13,100 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 20:29:13,101 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 20:29:13,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:13,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:13,182 INFO L262 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-09-11 20:29:13,183 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:13,245 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 20:29:13,245 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:15,224 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 20:29:15,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294924820] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:15,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:15,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 13, 21] total 26 [2024-09-11 20:29:15,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993362491] [2024-09-11 20:29:15,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:15,225 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:29:15,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:15,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:29:15,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=471, Unknown=0, NotChecked=0, Total=650 [2024-09-11 20:29:15,226 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-11 20:29:15,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:15,312 INFO L93 Difference]: Finished difference Result 42 states and 43 transitions. [2024-09-11 20:29:15,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-09-11 20:29:15,313 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) Word has length 57 [2024-09-11 20:29:15,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:15,314 INFO L225 Difference]: With dead ends: 42 [2024-09-11 20:29:15,316 INFO L226 Difference]: Without dead ends: 38 [2024-09-11 20:29:15,316 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 108 SyntacticMatches, 9 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=355, Invalid=767, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:29:15,317 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 96 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:15,317 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [107 Valid, 66 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:15,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-09-11 20:29:15,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-09-11 20:29:15,321 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 20:29:15,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2024-09-11 20:29:15,321 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 57 [2024-09-11 20:29:15,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:15,321 INFO L474 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2024-09-11 20:29:15,322 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 24 states have (on average 2.0) internal successors, (48), 25 states have internal predecessors, (48), 12 states have call successors, (12), 1 states have call predecessors, (12), 10 states have return successors, (26), 9 states have call predecessors, (26), 12 states have call successors, (26) [2024-09-11 20:29:15,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:15,322 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2024-09-11 20:29:15,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2024-09-11 20:29:15,323 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:15,323 INFO L216 NwaCegarLoop]: trace histogram [10, 10, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:15,334 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:15,523 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 20:29:15,524 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:15,524 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:15,524 INFO L85 PathProgramCache]: Analyzing trace with hash -682001842, now seen corresponding path program 9 times [2024-09-11 20:29:15,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:15,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446447349] [2024-09-11 20:29:15,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:15,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:15,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:15,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,627 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,719 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,754 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,781 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,808 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,830 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,848 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,863 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:15,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:15,886 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 20:29:15,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446447349] [2024-09-11 20:29:15,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446447349] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:15,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112227843] [2024-09-11 20:29:15,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:29:15,887 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:15,887 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:15,888 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 20:29:15,889 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 20:29:15,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2024-09-11 20:29:15,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:15,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-09-11 20:29:15,997 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:16,049 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 20:29:16,049 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:18,616 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 20:29:18,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112227843] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:18,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:18,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14, 23] total 28 [2024-09-11 20:29:18,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217820241] [2024-09-11 20:29:18,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:18,621 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-09-11 20:29:18,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:18,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-09-11 20:29:18,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=207, Invalid=549, Unknown=0, NotChecked=0, Total=756 [2024-09-11 20:29:18,622 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-09-11 20:29:18,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:18,723 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2024-09-11 20:29:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-11 20:29:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) Word has length 63 [2024-09-11 20:29:18,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:18,726 INFO L225 Difference]: With dead ends: 45 [2024-09-11 20:29:18,726 INFO L226 Difference]: Without dead ends: 41 [2024-09-11 20:29:18,726 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 120 SyntacticMatches, 10 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=423, Invalid=909, Unknown=0, NotChecked=0, Total=1332 [2024-09-11 20:29:18,727 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 135 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 76 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 141 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 76 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:18,727 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [147 Valid, 73 Invalid, 141 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 76 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:18,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-11 20:29:18,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-11 20:29:18,731 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 20:29:18,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2024-09-11 20:29:18,731 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 63 [2024-09-11 20:29:18,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:18,731 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2024-09-11 20:29:18,732 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 26 states have (on average 2.0) internal successors, (52), 27 states have internal predecessors, (52), 13 states have call successors, (13), 1 states have call predecessors, (13), 11 states have return successors, (29), 10 states have call predecessors, (29), 13 states have call successors, (29) [2024-09-11 20:29:18,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:18,732 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2024-09-11 20:29:18,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2024-09-11 20:29:18,733 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:18,733 INFO L216 NwaCegarLoop]: trace histogram [11, 11, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:18,744 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:18,933 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 20:29:18,933 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:18,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:18,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1904272772, now seen corresponding path program 10 times [2024-09-11 20:29:18,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:18,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241460011] [2024-09-11 20:29:18,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:18,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:18,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:18,992 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,050 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,139 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,177 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,210 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,235 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,257 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,276 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:19,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:19,333 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 20:29:19,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241460011] [2024-09-11 20:29:19,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241460011] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:19,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1658559017] [2024-09-11 20:29:19,334 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:29:19,334 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:19,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:19,335 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 20:29:19,337 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 20:29:19,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:29:19,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:19,498 INFO L262 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-09-11 20:29:19,499 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:19,569 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 20:29:19,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:22,897 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 20:29:22,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1658559017] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:22,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:22,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 25] total 30 [2024-09-11 20:29:22,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156025489] [2024-09-11 20:29:22,898 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:22,899 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2024-09-11 20:29:22,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:22,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2024-09-11 20:29:22,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=633, Unknown=0, NotChecked=0, Total=870 [2024-09-11 20:29:22,900 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-11 20:29:23,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:23,025 INFO L93 Difference]: Finished difference Result 48 states and 49 transitions. [2024-09-11 20:29:23,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-11 20:29:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) Word has length 69 [2024-09-11 20:29:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:23,027 INFO L225 Difference]: With dead ends: 48 [2024-09-11 20:29:23,027 INFO L226 Difference]: Without dead ends: 44 [2024-09-11 20:29:23,028 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 181 GetRequests, 132 SyntacticMatches, 11 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=497, Invalid=1063, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 20:29:23,028 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 162 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:23,029 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [175 Valid, 76 Invalid, 157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:23,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2024-09-11 20:29:23,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2024-09-11 20:29:23,037 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 20:29:23,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2024-09-11 20:29:23,038 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 69 [2024-09-11 20:29:23,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:23,039 INFO L474 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2024-09-11 20:29:23,039 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 28 states have (on average 2.0) internal successors, (56), 29 states have internal predecessors, (56), 14 states have call successors, (14), 1 states have call predecessors, (14), 12 states have return successors, (32), 11 states have call predecessors, (32), 14 states have call successors, (32) [2024-09-11 20:29:23,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:23,040 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2024-09-11 20:29:23,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2024-09-11 20:29:23,042 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:23,042 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:23,058 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 20:29:23,242 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 20:29:23,243 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:23,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:23,243 INFO L85 PathProgramCache]: Analyzing trace with hash -776930930, now seen corresponding path program 11 times [2024-09-11 20:29:23,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:23,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025329417] [2024-09-11 20:29:23,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:23,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:23,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,312 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:23,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,367 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,413 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,453 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,457 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 20:29:23,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,538 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,565 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,590 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,612 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,656 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,673 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:23,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:23,699 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 20:29:23,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025329417] [2024-09-11 20:29:23,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025329417] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:23,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [765562145] [2024-09-11 20:29:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:29:23,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:23,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:23,701 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 20:29:23,702 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 20:29:23,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2024-09-11 20:29:23,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:23,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-09-11 20:29:23,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:23,987 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 20:29:23,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:28,359 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 20:29:28,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [765562145] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:28,359 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:28,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16, 27] total 32 [2024-09-11 20:29:28,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511449746] [2024-09-11 20:29:28,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:28,360 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2024-09-11 20:29:28,360 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:28,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2024-09-11 20:29:28,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2024-09-11 20:29:28,361 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-09-11 20:29:28,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:28,461 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2024-09-11 20:29:28,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-09-11 20:29:28,461 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) Word has length 75 [2024-09-11 20:29:28,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:28,462 INFO L225 Difference]: With dead ends: 51 [2024-09-11 20:29:28,462 INFO L226 Difference]: Without dead ends: 47 [2024-09-11 20:29:28,463 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 144 SyntacticMatches, 12 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=577, Invalid=1229, Unknown=0, NotChecked=0, Total=1806 [2024-09-11 20:29:28,463 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 48 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 82 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 82 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:28,463 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 76 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 82 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:28,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2024-09-11 20:29:28,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2024-09-11 20:29:28,467 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 20:29:28,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2024-09-11 20:29:28,467 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 75 [2024-09-11 20:29:28,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:28,468 INFO L474 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2024-09-11 20:29:28,468 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 30 states have (on average 2.0) internal successors, (60), 31 states have internal predecessors, (60), 15 states have call successors, (15), 1 states have call predecessors, (15), 13 states have return successors, (35), 12 states have call predecessors, (35), 15 states have call successors, (35) [2024-09-11 20:29:28,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:28,468 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2024-09-11 20:29:28,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2024-09-11 20:29:28,469 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:28,469 INFO L216 NwaCegarLoop]: trace histogram [13, 13, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:28,482 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 20:29:28,669 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 20:29:28,669 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:28,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:28,670 INFO L85 PathProgramCache]: Analyzing trace with hash -1158839228, now seen corresponding path program 12 times [2024-09-11 20:29:28,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:28,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177436166] [2024-09-11 20:29:28,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:28,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:28,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,729 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:28,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,788 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:28,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,849 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,895 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,938 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:28,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:28,977 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:28,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,036 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,087 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,106 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,124 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,143 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:29,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:29,170 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 20:29:29,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177436166] [2024-09-11 20:29:29,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177436166] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:29,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723514458] [2024-09-11 20:29:29,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:29:29,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:29,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:29,172 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 20:29:29,185 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 20:29:29,485 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2024-09-11 20:29:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:29,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-11 20:29:29,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:29,569 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 20:29:29,569 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:35,327 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 20:29:35,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723514458] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:35,328 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:35,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 17, 29] total 34 [2024-09-11 20:29:35,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922248219] [2024-09-11 20:29:35,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:35,328 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2024-09-11 20:29:35,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:35,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2024-09-11 20:29:35,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2024-09-11 20:29:35,329 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-09-11 20:29:35,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:35,444 INFO L93 Difference]: Finished difference Result 54 states and 55 transitions. [2024-09-11 20:29:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-09-11 20:29:35,445 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) Word has length 81 [2024-09-11 20:29:35,445 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:35,445 INFO L225 Difference]: With dead ends: 54 [2024-09-11 20:29:35,445 INFO L226 Difference]: Without dead ends: 50 [2024-09-11 20:29:35,446 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 156 SyntacticMatches, 13 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=663, Invalid=1407, Unknown=0, NotChecked=0, Total=2070 [2024-09-11 20:29:35,446 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 78 mSDsluCounter, 78 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:35,446 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 87 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:29:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2024-09-11 20:29:35,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2024-09-11 20:29:35,454 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 20:29:35,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2024-09-11 20:29:35,455 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 81 [2024-09-11 20:29:35,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:35,455 INFO L474 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2024-09-11 20:29:35,455 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 32 states have (on average 2.0) internal successors, (64), 33 states have internal predecessors, (64), 16 states have call successors, (16), 1 states have call predecessors, (16), 14 states have return successors, (38), 13 states have call predecessors, (38), 16 states have call successors, (38) [2024-09-11 20:29:35,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:35,456 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2024-09-11 20:29:35,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-11 20:29:35,457 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:35,457 INFO L216 NwaCegarLoop]: trace histogram [14, 14, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:35,470 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 20:29:35,657 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 20:29:35,657 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:35,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:35,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1570097358, now seen corresponding path program 13 times [2024-09-11 20:29:35,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:35,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495756084] [2024-09-11 20:29:35,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:35,658 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:35,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:35,730 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:35,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:35,802 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:35,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:35,860 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:35,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:35,911 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:35,981 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:35,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,022 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,061 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,092 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,121 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,147 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,171 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,217 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,234 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:36,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,261 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 20:29:36,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495756084] [2024-09-11 20:29:36,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495756084] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:36,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358245702] [2024-09-11 20:29:36,262 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:29:36,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:36,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:36,263 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 20:29:36,265 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 20:29:36,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:36,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-11 20:29:36,586 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:36,670 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 20:29:36,671 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:43,874 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 20:29:43,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [358245702] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:43,874 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:43,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 31] total 36 [2024-09-11 20:29:43,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200940965] [2024-09-11 20:29:43,874 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:43,875 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2024-09-11 20:29:43,875 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:43,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2024-09-11 20:29:43,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=339, Invalid=921, Unknown=0, NotChecked=0, Total=1260 [2024-09-11 20:29:43,876 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-09-11 20:29:44,021 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:44,021 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2024-09-11 20:29:44,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2024-09-11 20:29:44,022 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) Word has length 87 [2024-09-11 20:29:44,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:44,022 INFO L225 Difference]: With dead ends: 57 [2024-09-11 20:29:44,023 INFO L226 Difference]: Without dead ends: 53 [2024-09-11 20:29:44,023 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 168 SyntacticMatches, 14 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 949 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=755, Invalid=1597, Unknown=0, NotChecked=0, Total=2352 [2024-09-11 20:29:44,024 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 47 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 99 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 99 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:44,024 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [63 Valid, 94 Invalid, 108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 99 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:44,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-11 20:29:44,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-11 20:29:44,031 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 20:29:44,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2024-09-11 20:29:44,034 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 87 [2024-09-11 20:29:44,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:44,034 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2024-09-11 20:29:44,034 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 34 states have (on average 2.0) internal successors, (68), 35 states have internal predecessors, (68), 17 states have call successors, (17), 1 states have call predecessors, (17), 15 states have return successors, (41), 14 states have call predecessors, (41), 17 states have call successors, (41) [2024-09-11 20:29:44,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:44,034 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2024-09-11 20:29:44,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2024-09-11 20:29:44,035 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:44,035 INFO L216 NwaCegarLoop]: trace histogram [15, 15, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:44,050 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-09-11 20:29:44,235 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 20:29:44,236 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:44,236 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:44,236 INFO L85 PathProgramCache]: Analyzing trace with hash -1407069436, now seen corresponding path program 14 times [2024-09-11 20:29:44,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:44,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41580619] [2024-09-11 20:29:44,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:44,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:44,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:44,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,395 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,455 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,508 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,600 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,639 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,672 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,743 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,769 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,844 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:44,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:44,869 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 20:29:44,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41580619] [2024-09-11 20:29:44,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [41580619] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:44,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586376581] [2024-09-11 20:29:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:29:44,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:44,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:44,871 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 20:29:44,872 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 20:29:45,271 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:29:45,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:45,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-09-11 20:29:45,274 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:45,363 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 20:29:45,363 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:29:54,293 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 20:29:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1586376581] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:29:54,294 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:29:54,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 19, 33] total 38 [2024-09-11 20:29:54,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585948991] [2024-09-11 20:29:54,294 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:29:54,294 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2024-09-11 20:29:54,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:29:54,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2024-09-11 20:29:54,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=377, Invalid=1029, Unknown=0, NotChecked=0, Total=1406 [2024-09-11 20:29:54,296 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 20:29:54,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:29:54,426 INFO L93 Difference]: Finished difference Result 60 states and 61 transitions. [2024-09-11 20:29:54,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2024-09-11 20:29:54,426 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 20:29:54,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:29:54,427 INFO L225 Difference]: With dead ends: 60 [2024-09-11 20:29:54,427 INFO L226 Difference]: Without dead ends: 56 [2024-09-11 20:29:54,427 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 180 SyntacticMatches, 15 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=853, Invalid=1799, Unknown=0, NotChecked=0, Total=2652 [2024-09-11 20:29:54,428 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 66 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:29:54,428 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 96 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:29:54,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2024-09-11 20:29:54,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2024-09-11 20:29:54,433 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 20:29:54,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2024-09-11 20:29:54,433 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 93 [2024-09-11 20:29:54,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:29:54,433 INFO L474 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2024-09-11 20:29:54,434 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 20:29:54,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:54,434 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2024-09-11 20:29:54,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2024-09-11 20:29:54,435 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:29:54,435 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:29:54,449 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-09-11 20:29:54,638 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 20:29:54,638 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:29:54,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:29:54,638 INFO L85 PathProgramCache]: Analyzing trace with hash -1758730226, now seen corresponding path program 15 times [2024-09-11 20:29:54,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:29:54,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679573452] [2024-09-11 20:29:54,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:29:54,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:29:54,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:54,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:29:54,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:54,796 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:54,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:54,876 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:54,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:54,934 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:54,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:54,985 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,033 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,074 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,146 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,196 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,248 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,271 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,291 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,310 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,327 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:29:55,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:29:55,353 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 360 refuted. 0 times theorem prover too weak. 330 trivial. 0 not checked. [2024-09-11 20:29:55,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:29:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679573452] [2024-09-11 20:29:55,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679573452] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:29:55,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046527276] [2024-09-11 20:29:55,353 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:29:55,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:29:55,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:29:55,355 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 20:29:55,357 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 20:29:55,859 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2024-09-11 20:29:55,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:29:55,860 INFO L262 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-11 20:29:55,862 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:29:55,948 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 20:29:55,948 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:07,069 INFO L134 CoverageAnalysis]: Checked inductivity of 690 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2024-09-11 20:30:07,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046527276] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:07,070 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:07,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20, 35] total 40 [2024-09-11 20:30:07,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271150457] [2024-09-11 20:30:07,070 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:07,070 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2024-09-11 20:30:07,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:07,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2024-09-11 20:30:07,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=417, Invalid=1143, Unknown=0, NotChecked=0, Total=1560 [2024-09-11 20:30:07,071 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-09-11 20:30:07,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:07,230 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2024-09-11 20:30:07,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-09-11 20:30:07,230 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) Word has length 99 [2024-09-11 20:30:07,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:07,231 INFO L225 Difference]: With dead ends: 63 [2024-09-11 20:30:07,231 INFO L226 Difference]: Without dead ends: 59 [2024-09-11 20:30:07,232 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 192 SyntacticMatches, 16 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=957, Invalid=2013, Unknown=0, NotChecked=0, Total=2970 [2024-09-11 20:30:07,232 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 67 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:07,232 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [85 Valid, 106 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:07,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-11 20:30:07,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-11 20:30:07,236 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 20:30:07,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2024-09-11 20:30:07,236 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 99 [2024-09-11 20:30:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:07,237 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2024-09-11 20:30:07,237 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 38 states have (on average 2.0) internal successors, (76), 39 states have internal predecessors, (76), 19 states have call successors, (19), 1 states have call predecessors, (19), 17 states have return successors, (47), 16 states have call predecessors, (47), 19 states have call successors, (47) [2024-09-11 20:30:07,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:07,237 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2024-09-11 20:30:07,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2024-09-11 20:30:07,238 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:07,238 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:07,253 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 20:30:07,441 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 20:30:07,442 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:07,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:07,442 INFO L85 PathProgramCache]: Analyzing trace with hash -1678126652, now seen corresponding path program 16 times [2024-09-11 20:30:07,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:07,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564796722] [2024-09-11 20:30:07,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:07,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:07,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:07,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,632 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,769 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 20:30:07,835 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,896 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:07,950 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:07,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,010 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,052 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,088 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,118 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,144 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,170 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,218 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,238 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,258 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:08,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:08,288 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 376 trivial. 0 not checked. [2024-09-11 20:30:08,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564796722] [2024-09-11 20:30:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564796722] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:08,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209406204] [2024-09-11 20:30:08,288 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-09-11 20:30:08,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:08,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:08,290 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 20:30:08,291 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 20:30:08,957 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-09-11 20:30:08,957 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:08,958 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-11 20:30:08,959 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:09,036 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 392 refuted. 0 times theorem prover too weak. 392 trivial. 0 not checked. [2024-09-11 20:30:09,036 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:22,619 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 648 refuted. 0 times theorem prover too weak. 136 trivial. 0 not checked. [2024-09-11 20:30:22,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209406204] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:22,620 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:22,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21, 37] total 42 [2024-09-11 20:30:22,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18117616] [2024-09-11 20:30:22,620 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:22,620 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2024-09-11 20:30:22,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:22,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2024-09-11 20:30:22,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=459, Invalid=1263, Unknown=0, NotChecked=0, Total=1722 [2024-09-11 20:30:22,621 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2024-09-11 20:30:22,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:22,770 INFO L93 Difference]: Finished difference Result 66 states and 67 transitions. [2024-09-11 20:30:22,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-09-11 20:30:22,771 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) Word has length 105 [2024-09-11 20:30:22,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:22,771 INFO L225 Difference]: With dead ends: 66 [2024-09-11 20:30:22,771 INFO L226 Difference]: Without dead ends: 62 [2024-09-11 20:30:22,772 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 277 GetRequests, 204 SyntacticMatches, 17 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1067, Invalid=2239, Unknown=0, NotChecked=0, Total=3306 [2024-09-11 20:30:22,773 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 37 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:22,773 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 115 Invalid, 120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:22,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-11 20:30:22,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-11 20:30:22,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 41 states have (on average 1.024390243902439) internal successors, (42), 42 states have internal predecessors, (42), 2 states have call successors, (2), 1 states have call predecessors, (2), 18 states have return successors, (19), 18 states have call predecessors, (19), 2 states have call successors, (19) [2024-09-11 20:30:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2024-09-11 20:30:22,780 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 105 [2024-09-11 20:30:22,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:22,780 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2024-09-11 20:30:22,781 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 40 states have (on average 2.0) internal successors, (80), 41 states have internal predecessors, (80), 20 states have call successors, (20), 1 states have call predecessors, (20), 18 states have return successors, (50), 17 states have call predecessors, (50), 20 states have call successors, (50) [2024-09-11 20:30:22,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2024-09-11 20:30:22,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2024-09-11 20:30:22,781 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:22,781 INFO L216 NwaCegarLoop]: trace histogram [18, 18, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:22,796 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 20:30:22,982 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 20:30:22,982 INFO L399 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:22,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:22,982 INFO L85 PathProgramCache]: Analyzing trace with hash -543729842, now seen corresponding path program 17 times [2024-09-11 20:30:22,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:22,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722989107] [2024-09-11 20:30:22,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:22,983 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:23,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,072 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:23,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,154 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,227 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,295 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,443 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,493 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,539 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,619 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,653 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,683 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,717 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,745 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,767 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,789 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,809 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,827 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:23,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 459 refuted. 0 times theorem prover too weak. 425 trivial. 0 not checked. [2024-09-11 20:30:23,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722989107] [2024-09-11 20:30:23,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722989107] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:23,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379503923] [2024-09-11 20:30:23,852 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-09-11 20:30:23,852 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:23,852 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:23,853 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:23,854 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-09-11 20:30:24,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2024-09-11 20:30:24,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:24,623 INFO L262 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-09-11 20:30:24,625 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:24,717 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 442 refuted. 0 times theorem prover too weak. 442 trivial. 0 not checked. [2024-09-11 20:30:24,717 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:30:40,864 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 0 proven. 731 refuted. 0 times theorem prover too weak. 153 trivial. 0 not checked. [2024-09-11 20:30:40,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379503923] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:30:40,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:30:40,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22, 39] total 44 [2024-09-11 20:30:40,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413713875] [2024-09-11 20:30:40,865 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:30:40,865 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2024-09-11 20:30:40,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:30:40,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2024-09-11 20:30:40,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2024-09-11 20:30:40,866 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2024-09-11 20:30:41,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:30:41,053 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2024-09-11 20:30:41,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-09-11 20:30:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) Word has length 111 [2024-09-11 20:30:41,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:30:41,054 INFO L225 Difference]: With dead ends: 69 [2024-09-11 20:30:41,054 INFO L226 Difference]: Without dead ends: 65 [2024-09-11 20:30:41,055 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 216 SyntacticMatches, 18 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1543 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1183, Invalid=2477, Unknown=0, NotChecked=0, Total=3660 [2024-09-11 20:30:41,056 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 170 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 190 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 188 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:30:41,056 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [190 Valid, 110 Invalid, 188 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:30:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2024-09-11 20:30:41,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2024-09-11 20:30:41,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 44 states have internal predecessors, (44), 2 states have call successors, (2), 1 states have call predecessors, (2), 19 states have return successors, (20), 19 states have call predecessors, (20), 2 states have call successors, (20) [2024-09-11 20:30:41,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 66 transitions. [2024-09-11 20:30:41,060 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 66 transitions. Word has length 111 [2024-09-11 20:30:41,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:30:41,061 INFO L474 AbstractCegarLoop]: Abstraction has 65 states and 66 transitions. [2024-09-11 20:30:41,061 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 21 states have call successors, (21), 1 states have call predecessors, (21), 19 states have return successors, (53), 18 states have call predecessors, (53), 21 states have call successors, (53) [2024-09-11 20:30:41,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:41,061 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 66 transitions. [2024-09-11 20:30:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2024-09-11 20:30:41,062 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:30:41,062 INFO L216 NwaCegarLoop]: trace histogram [19, 19, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:30:41,079 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-09-11 20:30:41,262 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-09-11 20:30:41,263 INFO L399 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:30:41,263 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:30:41,263 INFO L85 PathProgramCache]: Analyzing trace with hash 1011974276, now seen corresponding path program 18 times [2024-09-11 20:30:41,263 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:30:41,263 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577527573] [2024-09-11 20:30:41,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:30:41,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:30:41,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,402 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:30:41,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,492 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,649 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,715 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,798 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,857 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,915 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:41,962 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:41,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,001 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,037 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,071 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,101 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,129 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,155 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,175 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,193 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,208 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,223 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:30:42,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:30:42,246 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 513 refuted. 0 times theorem prover too weak. 477 trivial. 0 not checked. [2024-09-11 20:30:42,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:30:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577527573] [2024-09-11 20:30:42,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577527573] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:30:42,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [807243740] [2024-09-11 20:30:42,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-09-11 20:30:42,246 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:30:42,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:30:42,249 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:30:42,250 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-09-11 20:30:43,197 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2024-09-11 20:30:43,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:30:43,198 INFO L262 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 40 conjuncts are in the unsatisfiable core [2024-09-11 20:30:43,200 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:30:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 495 refuted. 0 times theorem prover too weak. 495 trivial. 0 not checked. [2024-09-11 20:30:43,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:31:02,648 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 819 refuted. 0 times theorem prover too weak. 171 trivial. 0 not checked. [2024-09-11 20:31:02,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [807243740] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:31:02,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:31:02,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 23, 41] total 46 [2024-09-11 20:31:02,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768099738] [2024-09-11 20:31:02,649 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:31:02,649 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2024-09-11 20:31:02,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:31:02,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2024-09-11 20:31:02,650 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=549, Invalid=1521, Unknown=0, NotChecked=0, Total=2070 [2024-09-11 20:31:02,652 INFO L87 Difference]: Start difference. First operand 65 states and 66 transitions. Second operand has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2024-09-11 20:31:02,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:31:02,809 INFO L93 Difference]: Finished difference Result 72 states and 73 transitions. [2024-09-11 20:31:02,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2024-09-11 20:31:02,810 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) Word has length 117 [2024-09-11 20:31:02,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:31:02,810 INFO L225 Difference]: With dead ends: 72 [2024-09-11 20:31:02,811 INFO L226 Difference]: Without dead ends: 68 [2024-09-11 20:31:02,811 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 309 GetRequests, 228 SyntacticMatches, 19 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1714 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1305, Invalid=2727, Unknown=0, NotChecked=0, Total=4032 [2024-09-11 20:31:02,812 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 134 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 134 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:31:02,812 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 125 Invalid, 134 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 134 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:31:02,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-09-11 20:31:02,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2024-09-11 20:31:02,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 46 states have internal predecessors, (46), 2 states have call successors, (2), 1 states have call predecessors, (2), 20 states have return successors, (21), 20 states have call predecessors, (21), 2 states have call successors, (21) [2024-09-11 20:31:02,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2024-09-11 20:31:02,816 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 117 [2024-09-11 20:31:02,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:31:02,816 INFO L474 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2024-09-11 20:31:02,816 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 44 states have (on average 2.0) internal successors, (88), 45 states have internal predecessors, (88), 22 states have call successors, (22), 1 states have call predecessors, (22), 20 states have return successors, (56), 19 states have call predecessors, (56), 22 states have call successors, (56) [2024-09-11 20:31:02,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:02,817 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2024-09-11 20:31:02,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2024-09-11 20:31:02,817 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:31:02,817 INFO L216 NwaCegarLoop]: trace histogram [20, 20, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:31:02,835 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-09-11 20:31:03,017 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:03,018 INFO L399 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:31:03,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:03,018 INFO L85 PathProgramCache]: Analyzing trace with hash 486282894, now seen corresponding path program 19 times [2024-09-11 20:31:03,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:31:03,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [61988308] [2024-09-11 20:31:03,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:31:03,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:31:03,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:31:03,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,329 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,430 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,515 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,586 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,652 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,714 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,838 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,881 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,921 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,957 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:03,993 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:03,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,024 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,055 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,084 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,111 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,132 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,149 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,164 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:04,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 570 refuted. 0 times theorem prover too weak. 532 trivial. 0 not checked. [2024-09-11 20:31:04,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:31:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [61988308] [2024-09-11 20:31:04,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [61988308] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:31:04,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391332765] [2024-09-11 20:31:04,188 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-09-11 20:31:04,188 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:04,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:31:04,189 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:31:04,190 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-09-11 20:31:05,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:05,362 INFO L262 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-09-11 20:31:05,363 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:31:05,470 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 551 refuted. 0 times theorem prover too weak. 551 trivial. 0 not checked. [2024-09-11 20:31:05,470 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:31:28,717 INFO L134 CoverageAnalysis]: Checked inductivity of 1102 backedges. 0 proven. 912 refuted. 0 times theorem prover too weak. 190 trivial. 0 not checked. [2024-09-11 20:31:28,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391332765] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:31:28,717 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:31:28,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24, 43] total 47 [2024-09-11 20:31:28,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023556873] [2024-09-11 20:31:28,718 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:31:28,718 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-11 20:31:28,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:31:28,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-11 20:31:28,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=594, Invalid=1568, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 20:31:28,719 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2024-09-11 20:31:28,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:31:28,885 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2024-09-11 20:31:28,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-09-11 20:31:28,886 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) Word has length 123 [2024-09-11 20:31:28,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:31:28,886 INFO L225 Difference]: With dead ends: 75 [2024-09-11 20:31:28,886 INFO L226 Difference]: Without dead ends: 71 [2024-09-11 20:31:28,887 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 240 SyntacticMatches, 21 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1430, Invalid=2860, Unknown=0, NotChecked=0, Total=4290 [2024-09-11 20:31:28,888 INFO L434 NwaCegarLoop]: 9 mSDtfsCounter, 73 mSDsluCounter, 109 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-11 20:31:28,888 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [95 Valid, 118 Invalid, 139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-11 20:31:28,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2024-09-11 20:31:28,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2024-09-11 20:31:28,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 48 states have internal predecessors, (48), 2 states have call successors, (2), 1 states have call predecessors, (2), 21 states have return successors, (22), 21 states have call predecessors, (22), 2 states have call successors, (22) [2024-09-11 20:31:28,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 72 transitions. [2024-09-11 20:31:28,892 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 72 transitions. Word has length 123 [2024-09-11 20:31:28,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:31:28,892 INFO L474 AbstractCegarLoop]: Abstraction has 71 states and 72 transitions. [2024-09-11 20:31:28,892 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 1.9782608695652173) internal successors, (91), 46 states have internal predecessors, (91), 22 states have call successors, (22), 1 states have call predecessors, (22), 21 states have return successors, (58), 20 states have call predecessors, (58), 22 states have call successors, (58) [2024-09-11 20:31:28,892 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:28,892 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 72 transitions. [2024-09-11 20:31:28,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2024-09-11 20:31:28,893 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:31:28,893 INFO L216 NwaCegarLoop]: trace histogram [21, 21, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:31:28,911 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2024-09-11 20:31:29,093 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:29,093 INFO L399 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:31:29,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:29,094 INFO L85 PathProgramCache]: Analyzing trace with hash 1510268740, now seen corresponding path program 20 times [2024-09-11 20:31:29,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:31:29,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297907861] [2024-09-11 20:31:29,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:31:29,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:31:29,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,233 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:31:29,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,401 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,568 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,680 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,787 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,884 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:29,973 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:29,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,060 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,142 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,215 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,313 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,400 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,477 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,531 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,635 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,687 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,735 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,786 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,846 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,903 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:30,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:30,973 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 20 proven. 610 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2024-09-11 20:31:30,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:31:30,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297907861] [2024-09-11 20:31:30,973 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297907861] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:31:30,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948738635] [2024-09-11 20:31:30,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-11 20:31:30,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:30,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:31:30,975 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:31:30,976 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2024-09-11 20:31:32,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-11 20:31:32,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:31:32,359 INFO L262 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 87 conjuncts are in the unsatisfiable core [2024-09-11 20:31:32,361 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:31:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-11 20:31:32,431 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-11 20:31:33,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1220 backedges. 0 proven. 610 refuted. 0 times theorem prover too weak. 610 trivial. 0 not checked. [2024-09-11 20:31:33,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948738635] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-11 20:31:33,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-11 20:31:33,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 45, 45] total 47 [2024-09-11 20:31:33,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360059364] [2024-09-11 20:31:33,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-11 20:31:33,481 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-09-11 20:31:33,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:31:33,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-09-11 20:31:33,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=2070, Unknown=0, NotChecked=0, Total=2162 [2024-09-11 20:31:33,482 INFO L87 Difference]: Start difference. First operand 71 states and 72 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) [2024-09-11 20:31:34,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:31:34,597 INFO L93 Difference]: Finished difference Result 78 states and 79 transitions. [2024-09-11 20:31:34,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-09-11 20:31:34,598 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) Word has length 129 [2024-09-11 20:31:34,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:31:34,600 INFO L225 Difference]: With dead ends: 78 [2024-09-11 20:31:34,600 INFO L226 Difference]: Without dead ends: 74 [2024-09-11 20:31:34,602 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 298 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=252, Invalid=7230, Unknown=0, NotChecked=0, Total=7482 [2024-09-11 20:31:34,602 INFO L434 NwaCegarLoop]: 26 mSDtfsCounter, 43 mSDsluCounter, 1078 mSDsCounter, 0 mSdLazyCounter, 2081 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 1104 SdHoareTripleChecker+Invalid, 2081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 2081 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-11 20:31:34,603 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 1104 Invalid, 2081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 2081 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-11 20:31:34,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2024-09-11 20:31:34,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2024-09-11 20:31:34,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 50 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (23), 22 states have call predecessors, (23), 2 states have call successors, (23) [2024-09-11 20:31:34,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2024-09-11 20:31:34,610 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 129 [2024-09-11 20:31:34,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:31:34,610 INFO L474 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2024-09-11 20:31:34,610 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 26 states have internal predecessors, (51), 1 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 21 states have call predecessors, (22), 1 states have call successors, (22) [2024-09-11 20:31:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:34,610 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2024-09-11 20:31:34,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2024-09-11 20:31:34,611 INFO L208 NwaCegarLoop]: Found error trace [2024-09-11 20:31:34,611 INFO L216 NwaCegarLoop]: trace histogram [22, 22, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2024-09-11 20:31:34,631 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2024-09-11 20:31:34,811 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-09-11 20:31:34,811 INFO L399 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-09-11 20:31:34,812 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:34,812 INFO L85 PathProgramCache]: Analyzing trace with hash -92396082, now seen corresponding path program 21 times [2024-09-11 20:31:34,812 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-11 20:31:34,812 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225936772] [2024-09-11 20:31:34,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-11 20:31:34,812 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-11 20:31:34,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:34,968 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-11 20:31:34,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,093 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,301 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,388 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,503 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,644 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,706 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,764 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,815 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,864 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,907 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,945 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:35,979 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:35,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,009 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,035 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,059 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,082 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,102 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,120 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,136 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 2 [2024-09-11 20:31:36,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-11 20:31:36,158 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 630 proven. 63 refuted. 0 times theorem prover too weak. 651 trivial. 0 not checked. [2024-09-11 20:31:36,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-11 20:31:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225936772] [2024-09-11 20:31:36,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225936772] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-11 20:31:36,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060857706] [2024-09-11 20:31:36,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-09-11 20:31:36,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:36,159 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-11 20:31:36,159 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-11 20:31:36,160 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2024-09-11 20:31:37,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2024-09-11 20:31:37,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-11 20:31:37,584 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 46 conjuncts are in the unsatisfiable core [2024-09-11 20:31:37,587 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-11 20:31:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1344 backedges. 672 proven. 0 refuted. 0 times theorem prover too weak. 672 trivial. 0 not checked. [2024-09-11 20:31:37,711 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-11 20:31:37,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060857706] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-11 20:31:37,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-11 20:31:37,712 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [27] total 29 [2024-09-11 20:31:37,712 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222693093] [2024-09-11 20:31:37,712 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-11 20:31:37,712 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2024-09-11 20:31:37,712 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-11 20:31:37,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2024-09-11 20:31:37,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=522, Unknown=0, NotChecked=0, Total=812 [2024-09-11 20:31:37,713 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2024-09-11 20:31:37,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-11 20:31:37,966 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2024-09-11 20:31:37,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-09-11 20:31:37,968 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) Word has length 135 [2024-09-11 20:31:37,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-11 20:31:37,968 INFO L225 Difference]: With dead ends: 74 [2024-09-11 20:31:37,968 INFO L226 Difference]: Without dead ends: 0 [2024-09-11 20:31:37,969 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=815, Invalid=1635, Unknown=0, NotChecked=0, Total=2450 [2024-09-11 20:31:37,969 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 2 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 195 SdHoareTripleChecker+Invalid, 117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-11 20:31:37,970 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 195 Invalid, 117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-11 20:31:37,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-11 20:31:37,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-11 20:31:37,970 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 20:31:37,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-11 20:31:37,970 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 135 [2024-09-11 20:31:37,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-11 20:31:37,970 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-11 20:31:37,970 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.0) internal successors, (50), 25 states have internal predecessors, (50), 2 states have call successors, (2), 1 states have call predecessors, (2), 22 states have return successors, (22), 22 states have call predecessors, (22), 2 states have call successors, (22) [2024-09-11 20:31:37,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-11 20:31:37,970 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-11 20:31:37,970 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-11 20:31:37,974 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2024-09-11 20:31:37,993 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2024-09-11 20:31:38,174 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-11 20:31:38,177 INFO L408 BasicCegarLoop]: Path program histogram: [21, 1] [2024-09-11 20:31:38,179 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2024-09-11 20:31:39,384 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-11 20:31:39,410 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 08:31:39 BoogieIcfgContainer [2024-09-11 20:31:39,411 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-11 20:31:39,411 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2024-09-11 20:31:39,411 INFO L270 PluginConnector]: Initializing Witness Printer... [2024-09-11 20:31:39,411 INFO L274 PluginConnector]: Witness Printer initialized [2024-09-11 20:31:39,411 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 08:29:03" (3/4) ... [2024-09-11 20:31:39,412 INFO L139 WitnessPrinter]: Generating witness for correct program [2024-09-11 20:31:39,415 INFO L361 RCFGBacktranslator]: Ignoring RootEdge to procedure id [2024-09-11 20:31:39,417 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 13 nodes and edges [2024-09-11 20:31:39,417 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2024-09-11 20:31:39,417 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2024-09-11 20:31:39,417 INFO L896 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2024-09-11 20:31:39,474 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.graphml [2024-09-11 20:31:39,475 INFO L149 WitnessManager]: Wrote witness to /storage/repos/certificate-witnesses-artifact/automizer/witness.yml [2024-09-11 20:31:39,475 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2024-09-11 20:31:39,475 INFO L158 Benchmark]: Toolchain (without parser) took 156470.39ms. Allocated memory was 172.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 135.8MB in the beginning and 423.9MB in the end (delta: -288.0MB). Peak memory consumption was 626.6MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,476 INFO L158 Benchmark]: CDTParser took 0.08ms. Allocated memory is still 104.9MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-11 20:31:39,478 INFO L158 Benchmark]: CACSL2BoogieTranslator took 164.82ms. Allocated memory is still 172.0MB. Free memory was 135.8MB in the beginning and 124.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,478 INFO L158 Benchmark]: Boogie Procedure Inliner took 20.37ms. Allocated memory is still 172.0MB. Free memory was 124.6MB in the beginning and 123.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,478 INFO L158 Benchmark]: Boogie Preprocessor took 17.95ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 121.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,478 INFO L158 Benchmark]: RCFGBuilder took 266.38ms. Allocated memory is still 172.0MB. Free memory was 121.4MB in the beginning and 140.7MB in the end (delta: -19.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,479 INFO L158 Benchmark]: TraceAbstraction took 155932.13ms. Allocated memory was 172.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 139.6MB in the beginning and 428.1MB in the end (delta: -288.4MB). Peak memory consumption was 629.1MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,479 INFO L158 Benchmark]: Witness Printer took 63.90ms. Allocated memory is still 1.1GB. Free memory was 428.1MB in the beginning and 423.9MB in the end (delta: 4.2MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2024-09-11 20:31:39,479 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.08ms. Allocated memory is still 104.9MB. Free memory is still 74.5MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 164.82ms. Allocated memory is still 172.0MB. Free memory was 135.8MB in the beginning and 124.6MB in the end (delta: 11.3MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 20.37ms. Allocated memory is still 172.0MB. Free memory was 124.6MB in the beginning and 123.5MB in the end (delta: 1.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 17.95ms. Allocated memory is still 172.0MB. Free memory was 123.5MB in the beginning and 121.4MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 266.38ms. Allocated memory is still 172.0MB. Free memory was 121.4MB in the beginning and 140.7MB in the end (delta: -19.2MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 155932.13ms. Allocated memory was 172.0MB in the beginning and 1.1GB in the end (delta: 914.4MB). Free memory was 139.6MB in the beginning and 428.1MB in the end (delta: -288.4MB). Peak memory consumption was 629.1MB. Max. memory is 16.1GB. * Witness Printer took 63.90ms. Allocated memory is still 1.1GB. Free memory was 428.1MB in the beginning and 423.9MB 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: 154.6s, OverallIterations: 22, TraceHistogramMax: 22, PathProgramHistogramMax: 21, EmptinessCheckTime: 0.0s, AutomataDifference: 3.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 1508 SdHoareTripleChecker+Valid, 1.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1235 mSDsluCounter, 2819 SdHoareTripleChecker+Invalid, 1.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2566 mSDsCounter, 397 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3805 IncrementalHoareTripleChecker+Invalid, 4202 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 397 mSolverCounterUnsat, 253 mSDtfsCounter, 3805 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 4050 GetRequests, 2983 SyntacticMatches, 210 SemanticMatches, 857 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14730 ImplicationChecksByTransitivity, 7.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=74occurred in iteration=21, InterpolantAutomatonStates: 362, 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, 22 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 137.3s InterpolantComputationTime, 3159 NumberOfCodeBlocks, 3159 NumberOfCodeBlocksAsserted, 167 NumberOfCheckSat, 4536 ConstructedInterpolants, 0 QuantifiedInterpolants, 13206 SizeOfPredicates, 211 NumberOfNonLiveVariables, 4116 ConjunctsInSsa, 589 ConjunctsInUnsatCore, 63 InterpolantComputations, 2 PerfectInterpolantSequences, 13195/29148 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - ProcedureContractResult [Line: 6]: Procedure Contract for id Derived contract for procedure id. Ensures: (((((((((((((((((((((((3 == \result) && (\old(x) == 3)) || ((19 == \result) && (19 == \old(x)))) || ((11 == \result) && (\old(x) == 11))) || ((\old(x) == 6) && (6 == \result))) || ((9 == \result) && (\old(x) == 9))) || ((\old(x) == 17) && (17 == \result))) || ((\old(x) == 18) && (18 == \result))) || ((2 == \result) && (\old(x) == 2))) || (20 < \old(x))) || ((10 == \result) && (\old(x) == 10))) || ((5 == \result) && (5 == \old(x)))) || ((20 == \result) && (\old(x) == 20))) || ((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))) || ((\old(x) == 16) && (16 == \result))) || ((\result == 0) && (\old(x) == 0))) RESULT: Ultimate proved your program to be correct! [2024-09-11 20:31:39,535 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE